BDX12-1.0S100RM

BDX BELLNIX | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 37

Technical content

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 This product is a step down DC-DC converter that h as a feature to change settings such as output voltage, turn-on sequence and turn-off sequence via serial communication (PMBus/AVSBus) during operation. Furthermore, the product is equipped with digital control feature achieving high output voltage accuracy and ultra high-speed response. ■ Features ･Output Voltage Accuracy ±0.5% ･Settings can be changed and monitored during operation via serial communication ･Ultra High-Speed Response (PMBus,AVSBus) ･Small foot print, high power density ･Turn-on and turn-off sequences can be configured ･High-speed serial communication via AVSBus (via PMBus) ･Overcurrent protection ･High reliability, High performance ･Under Voltage Lock Out ･SMD package ･ON/OFF Control ･Non-Isolated Converter ･Adjustable Output Voltage ･Operating temperature −40ºC to +85ºC (via PMBus/AVSBus) (Temperature derating required) ･Output Overvoltage Protection ･RoHS compliant ■ Rating Table 1 ※1 Models BDP Series Input V Vdc Output V Vdc Output I A Line Reg. %(typ.) Load Reg. %(typ.) ﾞ Noise mVpp(typ.) Efficiency %(typ.) BDX12-1.0S100RM ※4 12V (8.0 to 14.0) 1.0 (0.5 to 1.2) 0 to 100 ※3 0.2 0.2 20 ※2 (Io=50%) BDX12-1.0S50R0S ※5 12V (8.0 to 14.0) 1.0 (0.5 to 1.2) +50A ※3 ※6 0.2 0.2 20 ※2 89 ※7 （Io=50% ） ※1 : Unless otherwise specified, the product is measured at input voltage 12V, output voltage 1.0V, output current 100%, ambient temperature 25 ℃±5 ℃. ※2 : BW=20MHz. ※3 : Depending on ambient temperature, temperature derating and forced air cooling may be required. ※4: It is possible to operate by itself. When conne cting in parallel, it becomes the master unit. ※5: It is a slave unit for parallel operation or du al output operation along with BDX12-1.0S100RM. Does not operate as a single unit. ※6: By connecting in parallel with BDX12-1.0S100RM, tot al output current can be added by 50A per BDX12-1.0 S50R0S (total output current 350 A max.) ※7: When 1 unit of BDX12-1.0S50R0S is used in parallel operation. ■ Specification Table 2 BDX12 -1.0S100RM BDX12 -1.0S50R0S Input voltage range Refer to Table 1 Rated input voltage 12V 12V Rated output voltage 1.0V 1.0V Default preset output voltage 1.0V 1.0V Adjustable output voltage range Refer to Table 1 Output voltage accuracy ±0.5% ±0.5% Line regulation Refer to Table 1 (Rated output, Inp ut voltage varying in the range of Table 1) Load regulation Refer to Table 1 (Rated I/O voltage , output current varying from 0 to 100%) Ripple noise Refer to Table 1 (Rated input/output, measurement frequency bandwidth 20MHz) Efficiency Refer to Table 1 (Rated input, output cu rrent 50%) Refer to Table 1 (Rated input, output current 50%, when 1unit used) Overcurrent protection Yes Under voltage lock out Yes Output overvoltage protection Yes Remote ON/OFF Yes P-Good signal Yes Remote sensing Yes Operating temperature range −40ºC to +85ºC (Refer t o temperature derating described separately) Storage temperature range −40ºC to +85ºC Humidity 20 to 95%R.H. (Max. wet bulb temperature 6 9°C with no condensation) Storage condition Below 30°C /60% R.H before mounti ng Cooling condition Refer to temperature derating des cribed separately Weight 9.46g typ. 2.85g typ. Outer dimensions W=32.8 L=23.0 H=7.0(mm) (Refer to outer dimensions described separately) W=16.5 L=27.0 H=3.95(mm) (Refer to outer dimensions described separately) ＊ The above specifications are provided with rated value, unless otherwise specified. ＊ The contents provided in this datasheet may be changed at any time without prior notice.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 1. Scope These specifications shall apply to the non-isolate d type DC-DC converter, BDX12-1.0S100RM and BDX12-1.0S50R0S. 2. Model/Rating Model Name Rated input voltage Rated output Shape Remarks BDX12-1.0S100RM *1 DC 12.0V DC 1.0V, 100A SMD BDX12-1.0S50R0S *2 DC 12.0V DC 1.0V, +50A *3 SMD Total output current 350A max. Unless otherwise mentioned in the specifications, i nput shall be rated input, output shall be rated ou tput and ambient temperature shall be 25°C±5°C. *1 Operates as a single unit. When connecting in parallel, it becomes the master unit. *2 It is a slave unit for parallel operation or dual output operation along with BDX12-1.0S100RM. Does not operate as a single unit. *3 By connecting in parallel with BDX12-1.0S100RM, tot al output current can be added by 50A per BDX12-1.0S50R0S. *4 When using parallel and dual output operation toget her, the maximum configuration will be VOUT1: 300A max., VOUT2: 50A max. For details, refer to se ction 7-3 and “BDX series Parallel, Dual output operation Application Note”. 3. Environmental conditions 3-1 Temperature range In operation −40°C to +85°C (Derating required) In storage −40°C to +85°C 3-2 Humidity range In operation 20 to 95%R.H. (However, max. wet bulb temperature 69°C, no condensation) In storage 20 to 95%R.H. (However, max. wet bulb temperature 69°C, no condensation) Note) Store in a place below 30°C/60% R.H. before mounting. 4. Specifications & Standards The product is RoHS compliant. 4-1 Input characteristics Item Specifications & Standards Conditions Input voltage 8.0 to 14.0V (Rating 12.0V)

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 4-2 BDX12-1.0S100RM (VOUT1) Output characteristics and functions Characteristics when BDX12-1.0S100RM is operated as a single unit (VOUT1) . Item Specifications & Standards Conditions Rated output voltage 1.0V Output voltage by default 1.0V Output voltage tolerance 1.0V±0.5% max. Output curr ent at 0% Adjustable output voltage range 500 to 1200mV Configured via serial communication Output current 0 to 100A Derating required Load regulation 0.2% typ. 0.5% max. Output current varying from 0 to 100% Temperature regulation ±0.003%/°C typ. Temperature varying from -40 to +85°C Integrated regulation ±1.0% max. Including line regulation, load regulation, temp. regulation.*3 Ripple noise 20mVp-p typ. 50mVp-p max. BW = 20MHz Efficiency 89% typ. Output current at 50% 86% typ. Output current at 100% Overcurrent protection Operates at 105% or above (auto restart type) Refer to section 8-15 for operation. Maximum output capacitance 20mF (= 20000 μF) *4 Under Voltage Lock Out Yes Activation voltage: 7.5V typ. Deactivation voltage: 6.8V typ. Refer to section 8-12 for operation. ON/OFF control Between ON/OFF1 pin - SGND pin ON when open OFF when short circuit or low Refer to section 8-7-1 for voltage at open and low. P-Good output At normal output: High At abnormal output: Low Refer to section 8-10 for voltage at high and low. Output overvoltage protection Shut down Refer to section 8-14 for operation. Serial communication feature PMBus 1.3 compliance AVSBus compliance Sequence feature Yes (via PMBus communication) Monitoring feature Yes (via serial communication) Oscillation frequency setup 600kHz×2Phase Fixed *1 With measurement circuit of section 4-5 . *2 Unless otherwise specified, the following measurement conditions will be applied. Input voltage 12.0V, output voltage 1.0V, output current 100% and ambient temperature 25°C±5°C. *3 Value is designed value. *4 Maximum output capacitance depends on the output voltage and turn-on time when start-up, and on the characteristic of added capacitor. Make sure to check with the actual device. Contact us, if necessary to increase the output capacitance more than the maximum capacitance. *1, *2

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 4-3 BDX12-1.0S100RM // BDX12-1.0S50R0S (VOUT1) Output characteristics Characteristics when BDX12-1.0S100RM and BDX12-1.0S50R0S are in parallel operation (VOUT1). *1, *2 Item Specifications & Standards Conditions Rated output voltage 1.0V Output voltage by default 1.0V Output voltage tolerance 1.0V±0.5% max. Output current at 0% Adjustable output voltage range 500 to 1200mV Configured via serial communication Output current BDX12-1.0S50R0S × 1 unit: 0 to 150A BDX12-1.0S50R0S × 2 units: 0 to 200A BDX12-1.0S50R0S × 3 units: 0 to 250A BDX12-1.0S50R0S × 4 units: 0 to 300A BDX12-1.0S50R0S × 5 units: 0 to 350A Derating required Load regulation 0.2% typ. 0.5% max. Output current varying from 0 to 100% Temperature regulation ±0.003%/°C typ. Temperature varying from -40 to +85°C Integrated regulation BDX12-1.0S50R0S × 1 unit: ±1.0% max. Including line regulation, load regulation, temp. regulation.*3 Ripple noise 20mVp-p typ. 50mVp-p max. BW = 20MHz Efficiency BDX12-1.0S50R0S × 1 unit: 89% typ. BDX12-1.0S50R0S × 5 units: 88% typ. Output current at 50% BDX12-1.0S50R0S × 1 unit: 86% typ. BDX12-1.0S50R0S × 5 units: 84% typ. Output current at 100% Overcurrent protection Operates at 105% or above (auto restart type) Refer to section 8-15 for operation. Maximum output capacitance 20mF (= 20000 μF) *4 Oscillation frequency setup BDX12-1.0S50R0S × 1 unit: 600kHz typ. × 3Phase BDX12-1.0S50R0S × 2 units: 600kHz typ. × 4Phase BDX12-1.0S50R0S × 3 units: 600kHz typ. × 5Phase BDX12-1.0S50R0S × 4 units: 600kHz typ. × 6Phase BDX12-1.0S50R0S × 5 units: 600kHz typ. × 7Phase Fixed *1 With measurement circuit of section 4-5 . *2 Unless otherwise specified, the following measurement conditions will be applied. Input voltage 12.0V, output voltage 1.0V, output current 100% and ambient temperature 25°C±5°C. *3 Value is designed value. *4 Maximum output capacitance depends on the output voltage and turn-on time when start-up, and on the characteristic of added capacitor. Make sure to che ck with the actual device. Contact us, if necessary to increase the output capacitance more than the maximum capacitance.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 4-4 BDX12-1.0S50R0S Dual output (VOUT2) characteristics Characteristics when BDX12-1.0S50R0S are in dual output operation (VOUT2). *1, *2 Item Specifications & Standards Conditions Rated output voltage 1.0V Output voltage by default 1.0V Output voltage tolerance 1.0V±0.5% max. Output current at 0% Adjustable output voltage range 500 to 1200mV Configured via serial communication Output current 0 to 50A Derating required Load regulation 0.2% typ. 0.5% max. Output current varying from 0 to 100% Temperature regulation ±0.003%/°C typ. Temperature varying from -40 to +85 °C Integrated regulation ±1.0% max. Including line regulation, load regulati on, temp. regulation. *3 Ripple noise 20mVp-p typ. 50mVp-p max. BW = 20MHz Efficiency 89% typ. VOUT1, VOUT2 when both output current at 50% 86% typ. VOUT1, VOUT2 when both output current at 100% Overcurrent protection Operates at 105% or above (auto restart type) Refer to section 8-15 for operation Maximum output capacitance 10mF (= 10000 μF) *4 Oscillation frequency setup 500kHz Fixed *1 With measurement circuit of 4-5 *2 Unless otherwise specified, the following measurement conditions will be applied. Input voltage 12.0V, output voltage 1.0V, output current 100% and ambient temperature 25°C±5°C. *3 Value is designed value. *4 Maximum output capacitance depends on the output voltage and turn-on time when start-up, and on the characteristic of added capacitor. Make sure to che ck with the actual device. Contact us, if necessary to increase the output capacitance more than the maximum capacitance.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 4-5 Measurement circuit 4-5-1 BDX12-1.0S100RM Single operation measurement circuit ON/OFF2 Load Vin SW1(VOUT1 ON/OFF control ) Open = Output ON Short = Output OFF V VIN PGND A VOUT V A +SENSE 1 -SENSE 1 Cin Cout Cin:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×4 Cout:100uF(3216 size Multi -layer ceramic capacitor )×8 BDX12-1.0S100RM series 7,16 8,9,14,15 10,11,12,13 +SENSE2 -SENSE2 SDA SCL SALRT AVS_SDA AVS_MDA AVS_VDDIO AVS_CLK SGND SA CONFIG PWM2 PWM3 PWM4 PWM5 PWM6 IMON 2 IMON 3 IMON 4 IMON 5 IMON 6 REFIN TMON1 TMON2 P-Good1 P-Good2 ON/OFF1 SW1 Rsa Rcon Ronoff1 Conoff1 VOUT1 Rsa: Address setting resistor Rcon:5.6kΩ(Configuration ID setting resistor , standard setting ) Ronoff 1:10Ω Conoff 1:0.1uF(1005 size Multi -layer ceramic capacit or ) Coaxial cable : 50 Ω, 1.5m R0: 51 Ω C0: 0.1μF Oscilloscope (ripple noise measurement) 4-5-2 BDX12-1.0S100RM // BDX12-1.0S50R0S Parallel operation measurement circuit ON/OFF2 Load Vin SW1(VOUT1 ON/OFF control ) Open: Output ON Short : Output OFF V VIN PGND A VOUT V A +SENSE 1 -SENSE 1 Cin1 Cout1 Cin1:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×4 Cin2:10uF(3216 size Multi -layer ceramic capacitor )×4 Cout1:100uF(3216 size Multi -layer ceramic capacitor )×8, 47uF(2012 size Multi -layer ceramic capacitor )×8 Cout2:100uF(3216 size Multi -layer ceramic capacitor )×4 BDX12-1.0S100RM series 7,16 8,9,14,15 10,11,12,13 +SENSE2 -SENSE2 SDA SCL SALRT AVS_SDA AVS_MDA AVS_VDDIO AVS_CLK SGND SA CONFIG PWM2 PWM3 PWM4 PWM5 PWM6 IMON2 IMON3 IMON4 IMON5 IMON6 REFIN TMON1 TMON2 P-Good1 P-Good2 ON/OFF1 SW1 Rsa Rcon Ronoff1 Conoff1 VIN PGND VOUT BDX12-1.0S50R0S 2,14 PWM FAULT REFIN IMON TMON Cref2 Cout2Cin2 VOUT1 Cref2:0.1uF(1005 size Multi -layer ceramic capacitor ) Rsa: Address setting resistor Rcon: Configuration ID setting resistor Ronoff1:10Ω Conoff1:0.1uF(1005 size Multi -layer ceramic capacit or ) Coaxial cable: 50 Ω, 1.5m R0: 51 Ω C0: 0.1μF Oscilloscope (ripple noise measurement)

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 4-5-3 BDX12-1.0S50R0S Dual output measurement circ uit ON/OFF2 Load1 Vin Cref1:2.2uF(2012 size Multi -layer ceramic capacitor ) Cref2:0.1uF(1005 size Multi -layer ceramic capacitor ) Rsa: Address setting resistor Rcon: Configuration ID setting resistor Ronoff1:10Ω Conoff1:0.1uF(1005 size Multi -layer ceramic capacitor ) V VIN PGND A VOUT V A +SENSE 1 -SENSE 1 Cin1 Cout1 Cin1:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×4 Cin2:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×8 Cout1:100uF(3216 size Multi -layer ceramic capacitor )×8, 47uF(2012 size Multi -layer ceramic capacitor )×8 Cout2:100uF(3216 size Multi -layer ceramic capacitor )×4, 47uF(2012 size Multi -layer ceramic capacitor )×16, 1000uF(7343 size Conductive polymer capacitor )×1 BDX12-1.0S100RM series 7,16 8,9,14,15 10,11,12,13 +SENSE 2 -SENSE 2 SDA SCL SALRT AVS_SDA AVS _MDA AVS_VDDIO AVS_CLK SGND SA CONFIG PWM2 PWM3 PWM4 PWM5 PWM6 IMON2 IMON3 IMON4 IMON5 IMON6 REFIN TMON1 TMON2 P-Good 1 P-Good 2 ON/OFF1 SW1 Rsa Rcon Ronoff1 Conoff1 VIN PGND VOUT BDX12-1.0S50R0S 2,14 PWM FAULT REFIN IMON TMON Cref2 Cout2 Cin2 VOUT1 Load2 A VOUT2 V Cref1 SW2 Ronoff2 Conoff2 SW1(VOUT1 ON/OFF control ) Open: Output ON Short: Output OFF SW1(VOUT2 ON/OFF control ) Open: Output ON Short: Output OFF Coaxial cable: 50 Ω, 1.5m R0: 51 Ω C0: 0.1μF Oscilloscope （ripple noise measurement）

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 Airflow Component to measure the temperature 5. Temperature derating Install BDX series in a well-ventilated place. Implement derating appropriate to usage environment. Derating shall be according to ambient temperature and input voltage. Temperature of the converter varies substantially d epending on the board it is mounted on and on the ambient temperature. Ultimately, therefore, mount t he converter onto a device which will actually be u sed with the converter. When operated with the actual e quipment at the highest ambient temperature, temperature of the converter must not exceed the absolute maximum rating (112.5°C max.). 5-1 BDX12-1.0S100RM <Energization condition> -Input voltage 12V -Output voltage 1.0V < Heat release pattern conditions > Copper foil coating of 120 x 120 mm in dimension and 70 μm thickness when mounted on a 6 layered board (Only BDX12-1.0S100RM is mounted) <Air-flow direction, Condition of measuring temperature> 100 120 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Output current [A] Ambient temperature [℃] Wind speed 0m/s 1m/s 2m/s

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 5-2 BDX12-1.0S50R0S (Parallel operation) <Energization condition> <Air-flow direction, Condition of measuring temperature> -Input voltage 12V -Output voltage 1.0V < Heat release pattern conditions > Copper foil coating of 120 x 120 mm in dimension and 70 μm thickness when mounted on a 6 layered board (Only BDX12-1.0S50R0S is mounted) 5-3 BDX12-1.0S50R0S (Dual output operation) <Energization condition> <Air-flow direction, Condition of measuring temperature> -Input voltage 12V -Output voltage 1.0V <Heat release pattern conditions> Copper foil coating of 120×120mm in dimension and 70 μm thickness when mounted on a 6 layered board (Only BDX12-1.0S50R0S is mounted) <Air-flow direction, Condition of measuring temperature> -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Output current [A] Ambient temperature [℃] Wind speed 0m/s 1m/s 2m/s -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Output current [A] Ambient temperature [℃] Wind speed 0m/s 1m/s 2m/s

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 6. Outer dimensions and description of pins 6-1 BDX12-1.0S100RM Shape and dimensions 32.8±0.5 23.0±0.5 7.0 max. 1 pin Lot.No. Company name Model name 20×1.52 1.63 4×1.52 3.43 30.23 2 9 1013 14 21 1.2 2.05 29.97 Top View Bottom View Side View 10.89 14.69 0.43 0.17 10.53 19.87 18.49 B pin A pin A pin dimension B pin dimension 2.84 1.57 26.97 20.07 18.4 11.78 21.03 A B 6-2 BDX12-1.0S100RM Recommended footprint Top View A pin from 7 to 16pin B pin from 1 to 6, 17 to 41pin 3.3 2.1 1.1 2.5 20×1.52 1.58 4×1.52 3.43 30.23 2 9 10 13 14 21 1.2 2.1 30.03 10.94 14.74 0.37 0.17 10.53 19.87 18.54 B pin A pin 20.12 26.97 Unit: mm Dimensional tolerance: ±0.2mm B pin space: 0.2mm min. Unit: mm Note) Recommended layout is shown on the left. Use your design standard for your specific design. When mounted by an automated machine, picking up at point A or B is needed.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 6-3 BDX12-1.0S100RM Description of pins Pin Name Function 7,16 VIN Voltage input pin 8,9,14,15 PGND Power ground pin 10,11,12,13 VOUT Voltage output pin

1 IMON6 Current signal input pin *1

2 IMON5 Current signal input pin *1

3 IMON4 Current signal input pin *1

4 IMON3 Current signal input pin *1

5 IMON2 Current signal input pin *1

6 SA Address setting pin

17 PWM2 PWM output pin

18 PWM3 PWM output pin

19 PWM4 PWM output pin

20 PWM5 PWM output pin

21 PWM6 PWM output pin

22 AVS_CLK AVSBus clock input pin

23 SGND Signal ground

24 AVS_SDA AVSBus output pin

25 AVS_MDA AVSBus input pin

26 AVS_VDDIO AVSBus reference voltage input pin

27 ON/OFF2 VOUT2 Remote ON/OFF input pin

28 ON/OFF1 VOUT1 Remote ON/OFF input pin

29 P-Good2 VOUT2 Power-good output pin

30 P-Good1 VOUT1 Power-good output pin

31 SCL PMBus clock input pin

32 SDA PMBus data I/O pin

33 SALRT PMBus alarm output pin

34 CONFIG Configuration ID setting pin

35 +SENSE2 VOUT2 (+) Remote sensing pin *1 36 -SENSE2 VOUT2 (-) Remote sensing pin *1 37 +SENSE1 VOUT1 (+) Remote sensing pin *1 38 -SENSE1 VOUT1(-) Remote sensing pin *1

39 TMON2 VOUT2 Temperature signal input pin

40 TMON1 VOUT1 Temperature signal input pin

41 REFIN Current signal reference voltage output pi n *1

*1 Particular attention is required since these pins a re related to the feedback loop. Make sure to refer to section 7 before use.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 6-4 BDX12-1.0S50R0S Shape and dimensions Top View Bottom View Side View Model name code Lot.No. 1 pin Company name Board address 16.5±0.5 27.0±0.5 3.95 max.0.2 2.3 1.15 2.5 4.7 7.1 9.5 11.9 14.2 0.1 2.75 7.1 11.45 14.3 11.7 14.4 0.4 1.4 8.0 12.75 15.1 17.1 19.1 22.2 24.2 19.3 4.7 11.78 A B 6-5 BDX12-1.0S50R0S Recommended footprint 0.4 2.3 1.15 4.7 7.1 9.5 11.9 14.2 0.3 2.31 7.1 11.89 14.5 14.6 0.39 0.95 8.45 13.2 15.55 17.55 19.55 22.65 24.85 AB C D E F G Top View 1.5 2.89 1.6 2.1 2.5 0.35 2.7 4.2 1.6 7.91 1.7 6.55 10.9 2.5 3.4 0.8 A B C D 7.91 1.2 E 1.8 2.7 1.6 2.8 F G 0.45 Unit: mm Note 1: Recommended layout is shown on the left. Use your design standard for your specific design. Note 2: Do not wire the pattern directly under the converter (first layer). However, this does not apply to recommended patterns shown in section 7-3 When mounted by an automated machine, picking up at point A or B is needed. Unit: mm Dimensional tolerance: ±0.2mm

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 6-6 BDX12-1.0S50R0S Description of pins Pin Name Function 2,14 VIN Voltage input pin 3,7,9,13 PGND Power ground pin

8 VOUT Voltage output pin

16 PWM PWM input pin

17 FAULT FAULT signal output pin

18 REFIN Current signal reference voltage input pin *1

19 IMON Current signal output pin *1

20 TMON Temperature signal output pin

4,5,6,10,11,12 GND Ground for heat dissipation 1,15 GND Fixed pin (C onnected to GND inside the converter.) Particular attention is required since these pins a re related to the feedback loop. Make sure to refer to section 7 and the layout commentary in “BDX series Evaluation Board User Manual”. 6-7 Lot indication 7 1

7 D 2

Production code for manufacture control (may not be indicated ) Manufacturing month (Jan to Sep=1 to 9, Oct=O, Nov=N, Dec=D) Manufacturing year (the last digit of A.D.) (Manufactured in January 2017) (Manufactured in December 2017)

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 7. Standard connection diagram/ Recommended layout 7-1 BDX12-1.0S100RM Single operation ON/OFF2 Load Vin SW1(VOUT1 ON/OFF control ) Open = Output ON Short = Output OFF VIN PGND VOUT +SENSE 1 -SENSE 1 Cin Cout Cin:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×4 Cout:100uF(3216 size Multi -layer ceramic capacitor )×8 BDX12-1.0S100RM series 7,16 8,9,14,15 10,11,12,13 +SENSE2 -SENSE2 SDA SCL SALRT AVS_SDA AVS_MDA AVS_VDDIO AVS_CLK SGND SA CONFIG PWM2 PWM3 PWM4 PWM5 PWM6 IMON 2 IMON 3 IMON 4 IMON 5 IMON 6 REFIN TMON1 TMON2 P-Good1 P-Good2 ON/OFF1 SW1 Rsa Rcon Ronoff1 Conoff1 VOUT1 Rsa: Address setting resistor Rcon:5.6kΩ (Configuration ID setting resistor , standard setting ) Ronoff1:10Ω Conoff1:0.1uF(1005 size Multi -layer ceramic capacit or ) Note 1: Make sure to connect the +SENSE1 and -SENSE1 pins to the converter. Note 2: The SENSE line (the line from +SENSE1, -SENSE1 pin to the both sides of Cout) is related to the feedback loop. Since the SENSE line is sensitive to noise, do not route the wiring long as much as possible and wire it in parallel. Note 3: When wiring between SW1 and the converter is extend ed and connected , o vershoot and undershoot may occur on the ON/OFF 1 pin. In that c ase, please connect SW1 via RC filter (reference value: Ronoff 1 = 10 Ω, Conoff 1 = 0.1 μF). Note 4: Rsa is a resistor to set a device address via PMBus communication. Make sure to connect an appropriate resistor for the required address. Note 5: Rcon is a resistor to set a configuration ID. Connect a resistor of a value according to the configuration ID to be called at startup. When using the standard setting, connect a 5.6 kΩ resistor. Note 6: Leave the SALRT pin, SDA pin and SCL pin OPEN when the PMBus communication function is not used. Note 7: When not using the AVSBus communication fun ction, connect the AVS_CLK pin and AVS_MDA pin to the SGND pin, and leave the AVS_VDDIO pin and AVS_SDA pin OP EN. Note 8: Make sure to add input/output capacitors ( Cin, Cout) as close to the root of the converter as possible. Note 9: Wire between the input power and the conve rter in order to lower line impedance. If the line impedance gets high, connect the capacitor which ha s appropriate capacity to operate stable input voltage to Cin in parallel. Note 10: When adding the output capacitor Cout, the converter may not start depending on capacity. Make sure to check with the actual device.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 7-2 BDX12-1.0S100RM // BDX12-1.0S50R0S Parallel operation ON/OFF2 Load Vin SW1(VOUT1 ON/OFF control ) Open: Output ON Short: Output OFF VIN PGND VOUT +SENSE 1 -SENSE 1 Cin1 Cout1 Cin1:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×4 Cin2:10uF(3216 size Multi -layer ceramic capacitor )×4 Cout1:100uF(3216 size Multi -layer ceramic capacitor )×8, 47uF(2012 size Multi -layer ceramic capacitor )×8 Cout2:100uF(3216size Multi -layer ceramic capacitor )×4 BDX12-1.0S100RM series 7,16 8,9,14,15 10,11,12,13 +SENSE2 -SENSE2 SDA SCL SALRT AVS_SDA AVS_MDA AVS_VDDIO AVS_CLK SGND SA CONFIG PWM2 PWM3 PWM4 PWM5 PWM6 IMON2 IMON3 IMON4 IMON5 IMON6 REFIN TMON1 TMON2 P-Good1 P-Good2 ON/OFF1 SW1 Rsa Rcon Ronoff1 Conoff1 VIN PGND VOUT BDX12-1.0S50R0S 2,14 PWM FAULT REFIN IMON TMON Cref2 Cout2Cin2 VOUT1 Cref2:0.1uF(1005 size Multi -layer ceramic capacitor ) Rsa: Address setting resistor Rcon: Configuration ID setting resistor Ronoff1:10Ω Conoff1:0.1uF(1005 size Multi -layer ceramic capacit or ) Note 1: The default setting is set for single opera tion, so when parallel operation is required, setti ng writing by serial communication is necessary. Please refer to “BDX series Parallel, Dual output operation Application Note” for details about parallel operation, such as setting writing and using multiple BDX 12-1.0S50R0S. Note 2: SENSE line (the line from +SENSE1, -SENSE1 pin to the both sides of Cout1) is related to the feedback loop. Since the SENSE line is sensitive to noise, do not route the wiring long as much as possible and wire it in parallel. Note 3: IMON-REFIN line (the line from IMONx and RE FIN pin of BDX12-1.0S100RM to IMON and REFIN pin of BDX12-1.0S50R0S) is strongly related t o the feedback loop and current monitor accuracy. Since the IMON-REFIN line is sensitive to noise, do not route the wiring long as much as possible and wire it in parallel. Please refer to the layout commentary in "BDX serie s Evaluation Board User Manual" for handling the IMON-REFIN line. Note 4: Current signal reference voltage of 1.25V typ. is supplied to the REFIN line (the line from REFIN pin of BDX12-1.0S100RM to REFIN pin of BDX12-1.0S50R0S) from BDX12-1.0S100RM, and it is strongly related to current monitor accuracy. Since the REFIN line is sensitive to noise, insert a capacitor of Cref2 = 0.1uF on the BDX12-1.0S50R0S s ide. Also, make sure to keep the capacitance 20uF or less between REFIN and GND. Note 5: At the PWM line (the line from PWMx pin of BDX12-1.0S100RM to PWM pin of BDX12-1.0S50R0S) a square wave of 0⇔3.3V typ., 600kHz typ. is transmitted. Be careful not to bring PWM line close to SENSE line, IMON - REFIN line, and to other noise sensitive lines. Also, be careful that the PWM line does not exceed 5V.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 7-3 BDX12-1.0S50R0S Dual output operation ON/OFF2 Load1 Vin Cref1:2.2uF(2012 size Multi -layer ceramic capacitor ) Cref2:0.1uF(1005 size Multi -layer ceramic capacitor ) Rsa: Address setting resistor Rcon: Configuration ID setting resistor Ronoff1:10Ω Conoff1:0.1uF(1005 size Multi -layer ceramic capacitor ) VIN PGND VOUT +SENSE 1 -SENSE 1 Cin1 Cout1 Cin1:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×4 Cin2:22uF(3225 size Multi -layer ceramic capacitor )×4, 10uF(3216 size Multi -layer ceramic capacitor )×8 Cout1:100uF(3216 size Multi -layer ceramic capacitor )×8, 47uF(2012 size Multi -layer ceramic capacitor )×8 Cout2:100uF(3216 size Multi -layer ceramic capacitor )×4, 47uF (2012 size Multi -layer ceramic capacitor )×16, 1000uF(7343 size Conductive polymer capacitor )×1 BDX12-1.0S100RM series 7,16 8,9,14,15 10,11,12,13 +SENSE 2 -SENSE 2 SDA SCL SALRT AVS_SDA AVS _MDA AVS_VDDIO AVS_CLK SGND SA CONFIG PWM2 PWM3 PWM4 PWM5 PWM6 IMON2 IMON3 IMON4 IMON5 IMON6 REFIN TMON1 TMON2 P-Good 1 P-Good 2 ON/OFF1 SW1 Rsa Rcon Ronoff1 Conoff1 VIN PGND VOUT BDX12-1.0S50R0S 2,14 PWM FAULT REFIN IMON TMON Cref2 Cout2 Cin2 VOUT1 Load2 VOUT2 Cref1 SW2 Ronoff2 Conoff2 SW1(VOUT1 ON/OFF control ) Open: Output ON Short: Output OFF SW1(VOUT2 ON/OFF control ) Open: Output ON Short: Output OFF Note 1: Make sure to connect the +SENSEx and -SENSEx pins to the converter. Note 2: The SENSE line (the line from +SENSEx, -SEN SEx pin to the both sides of Coutx) is related to t he feedback loop. Since the SENSE line is sensitive to noise, do not route the wiring long as much as possible and wire it in parallel. Note 3: When wiring between SWx and the converter i s extended and connected, overshoot and undershoot may occur on the ON/OFFx pin. In that ca se, please connect SWx via RC filter (reference value: Ronoffx = 10 Ω, Conoffx = 0.1 μF). Note 4: The default setting is set for single oper ation, so when dual output operation is required, s etting writing by serial communication is necessary. Pleas e refer to “BDX series Parallel, Dual output operation Application Note” for details about paral lel operation, such as setting writing and using along with parallel operation. Note 5: IMON-REFIN line (the line from IMONx and REFIN pin of BDX-1.0S100RM to IMON and REFIN pin of BDX12-1.0S50R0S) is strongly related to the feedback loop and current monitor accuracy. Since the IMON-REFIN line is sensitive to noise, do not r oute the wiring long as much as possible and wire it in parallel. Please refer to the layout commentary in "BDX serie s Evaluation Board User Manual" for handling the IMON-REFIN line. Note 6: Current signal reference voltage of 1.25V typ. is supplied to the REFIN line (the line from REFIN pin of BDX12-1.0S100RM to REFIN pin of BDX12-1.0S50R0S) from BDX12-1.0S100RM, and it is strongly related to current monitor accuracy. Since the REFIN line is sensitive to noise, insert a capacitor between REFIN and GND of Cref1 = 2.2uF on BDX12-1.0S100RM side and Cref2 = 0.1uF on BDX12-1.0S50R0S side. Also, make sure to k eep the capacitance 20uF or less between REFIN and GND. Note 7: At the PWM line (the line from PWMx pin of BDX12-1.0S100RM to PWM pin of BDX12-1.0S50R0S) a square wave of 0 ⇔3.3V typ., 500kHz typ. is transmitted. Be careful not to bring PWM line close to SENSE line, IMON - REFIN line, and to other noise sensitive lines. Also, be careful that the PWM line does not exceed 5V.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 7-4 Recommended layout Connect the VIN and VOUT pins of BDX12-1.0S100RM an d BDX12-1.0S50R0S in a solid pattern in the vicinity of the converter pin (see reference layout below). The reference layout diagram below shows only the power lines on the mounting surface. Please design considering the current value and the environmental temperature etc. to be used. Please refer to the layout commentary in "BDX serie s Evaluation Board User Manual" for detailed layout such as handling signal lines and using multiple units of BDX12-1.0S50R0S. 2 9 14 21

22 Cout

BDX12-1.0S100RM 1 15 Vout Cout Cout GND GND Vin Vin BDX12-1.0S50R0S Cin Cin

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 8. Functions 8-1 Digital control The PMBus and AVSBus communication interface (serial communication) allows output voltage, sequence and other product settings to be changed and inform ation such as input voltage and output voltage to b e obtained. Values configured via serial communication should b e taken as the targeted ones which could differ fro m the actual values due to product variations. Operating memory （Volatile） Writing by special command Copying the setting according to the configuration ID setting when powering on Control circuit PMBus/AVSBus Interface Status register Referring while executing Referring when reading the settings Referring when reading the Status register Rewriting depending on the operation state Referring during monitoring the operation state Rewriting when changing the settings Communicating with PMBus master device PMBus PMBus master device BDX12-1.0S100RM series AVSBus AVSBus master device Communicating with AVSBus master device User store memory (Non-volatile) ID0 ID1 ID2 ID7 … Digital control conceptual diagram 8-1-1 Internal memory The product contains volatile operating memory and non-volatile user store memory. Settings for the converter are stored in the user store memory and t he settings are copied from the user store memory corresponding to the configuration ID setting resistor Rcon, to the operating memory during start-up. Rcon [Ω] Configuration ID 6800 0 1800 1 2200 2 2700 3 3300 4 3900 5 ― 6 (unavailable) 5600 7 (standard setting, write disabled) Control circuit of the product reads the contents o f the operating memory. The contents can be re-writ ten when the settings are changed via serial communicat ion. Because the operating memory is volatile, the changed settings in this memory are lost when the product is turned off. In order to change the setting value at start-up, i t is necessary to write the setting value to the no nvolatile user store memory by the special command and connec t the configuration ID setting resistor Rcon. You cannot rewrite and delete configuration ID once wri tten. For information of special commands, please contact us.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 8-2 Output voltage setup This output voltage can be changed in the range bet ween 500 to 1200mV only via serial communication, not via an external resistor. Output voltage other than the default setting can only be changed via se rial communication . Item PMBus/AVSBus commands Adjustment range Resolution Default setting Output voltage PMBus - VOUT_COMMAND 500 to 1200mV 1mV 1000mV AVSBus – TARGET_RAIL_VOLTAGE Note: When the output voltage setting is changed, t he setting of turn-on rise and turn-off fall will n ot be maintained. Please reset the turn-on rise and turn-off fall. 8-3 Margin State The product has 3 margin states, Margin OFF, Margin HIGH and Margin LOW when setting output voltage. Different output voltage can be set to each Margin state and the output voltage is adjusted to the val ue of the preset margin state at that time. Output voltage can be set independently on each Mar gin State in the range between 500 to 1200mV via PMBus communication. Items PMBus commands Adjustment range Resolution Default setting Output voltage in the Margin OFF State VOUT_COMMAND 500 to 1200mV 1mV 1000mV Output voltage in the Margin High State VOUT_MARGIN_HIGH 500 to 1200mV 1mV 1200mV Output voltage in the Margin Low State VOUT_MARGIN_LOW 500 to 1200mV 1mV 500mV The default margin state setting is OFF. The margin state can be switched to Margin High or Margin Low via PMBus communication when temporal voltage change is required. Item PMBus commands Default setting Switching Margin States OPERATION Margin OFF 8-4 Output voltage trimming This function allows output voltage to be increased or decreased in the range mentioned below via PMBu s communication. Item PMBus command Setting range Resolution Default setting Output voltage trimming VOUT_TRIM -250 to +250mV 1mV 0mV 8-5 Output voltage limit This function enables output voltage to be set at the highest level that can be configured via the VOUT_COMMAND, VOUT_MARGIN_HIGH or VOUT_MARGIN_LOW commands. It caps output voltage at the preset level in case of excessive output voltage accidentally being applied. It has no connection with the overvoltage protectio n feature. The setting value of this function can b e set via PMBus communication. Item PMBus command Setting range Resolution Default setting Output voltage max. value VOUT_MAX 500 to 1200mV 1mV 1200mV Output voltage min. value VOUT_MIN 500 to 1200mV 1mV 500mV

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 8-6 Remote sensing This function allows excellent load regulation characteristics to be obtained on the load side. The sensing line is a part of the feed back loop and is very sensitive, thus extra care must be exercised when routing a pattern. Route the +SENSEx and –SENSEx pins side by side and connect the pins to the load. When this function is not used at VOUT1, make sure to connect between the VOUT and +SENSE1 pins as well as the PGND and –SENSE1 pins of BDX12-1.0S100RM. When this function is not used at VOUT2, make sure to connect between the VOUT and +SENSE2 p ins as well as the PGND and –SENSE2 pins of BDX12-1.0S50R0S which is outputting VOUT2. 8-7 ON/OFF control This function allows output voltage to be turned on and off without switching the input on or off physically. It can be controlled by two methods, one is using the ON/OFFx pin and the other is by using the PMBus communication. Each method can be set to “enabled” or “disabled” by PMBus communication. By default, the ON/OFF control by the ON/OFFx pin is set “enabled”. 8-7-1 ON/OFF control via the ON/OFFx pin ON/OFF of VOUT1 and VOUT2 can be controlled by open ing or short-circuiting between the ON/OFF1 pin and SGND pin, ON/OFF2 pin and SGND pin. As per the chart below, ON/OFFx pin is pulled up to 3.3V internally via output resistance of 1kΩ. Between the ON/OFF1 pin – SGND pin Output Remarks Output resistance 1kΩ (±1%, ±100ppm/K) SHORT (0.8V max.) OFF Source current 3.5mA max. Note: Make sure not to generate chattering between the ON/OFFx pin and SGND pin. 8-7-2 ON/OFF control via PMBus communication Output voltage can be controlled on or off via PMBu s communication. When using PMBus communication to turn off output, switching can be terminated immediately or after a turn-off sequence has been applied. Items PMBus commands Default settings ON/OFF control via PMBus communication OPERATION Output OFF Operation setting of ON/OFF control *1 ON_OFF_CONFIG ON/OFF control – via ON/OFFx pin in enabled ON/OFF control – via PMBus communication is disabled *1 When both ON/OFF control by the ON/OFFx pin and PMB us communication are enabled, AND operation is performed as shown in the table below. Between ON/OFFx pin - SGND pin Settings by PMBus – OPERATION commands Output settings Open ON ON Open OFF OFF Short ON OFF Short OFF OFF 8-8 Sequence setup This function allows the items below to be configured.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 Turn-on Delay Turn-on Rise Turn-off Delay Turn-off Fall Turn-on delay is a period from when the ON command is issued by the ON/OFF control (via the ON/OFF1 pin or PMBus communication) until output voltage begins increasing. (See the figure below). Turn-off delay is a period from when the OFF command is issued by the ON/OFF control (via the ON/OFF1 pin or PMBus communication) until output voltage begins decreasing. (See the figure below). Turn-on Rise and Turn-off Fall are not retained when the output voltage setting is changed. Please reset Turn-on Rise and Turn-off Fall after changing the output voltage setting. Turn-on delay delay ON OFF Output voltage ON/OFF Control signal rise Turn-on Turn-off Turn-off fall There is a delay of 25ms typ. until the turn-on seq uence begins after the input. (See the figure below ). Each setting of the sequence features can be configured via PMBus communication. However, turn-on rise may differ from the preset time depending on load capacity. Output voltage Input voltage ON OFF ON/OFF Control signal 25ms typ.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 Items PMBus commands Setting range Resolution Default setting Turn-on delay TON_DELAY 0.2 to 50ms 0.01ms 0.2ms Turn-on rise TON_RISE 1.0 to 10ms 0.001ms 1.0ms Turn-off delay TOFF_DELAY 0.0 to 50ms 0.01ms 0.0ms Turn-off fall TOFF_FALL 1.0 to 10ms 0.001ms 1.0ms Turn-off delay and turn-off fall do not apply when the converter is turned off by the following protec tion features (Under voltage lock out, Input overvoltage protection, Output overvoltage protection, Overcur rent protection). 8-9 Output voltage transition rate setting This function allows output voltage transition rate to be configured via serial communication when changing output voltage. Item PMBus/AVSBus commands Setting range Resolution Default setting VOUT1 Output voltage transition rate setting value PMBus - VOUT_TRANSITION_RATE 0.1 to 10mV/ μs 0.1mV/ μs 10mV/ μs AVSBus - TRANSITION_RATE VOUT2 Output voltage transition rate setting value PMBus - VOUT_TRANSITION_RATE 0.1 to 1mV/ μs 0.1mV/ μs 1mV/ μs AVSBus - TRANSITION_RATE 8-10 P-Good signal P-Good1 and P-Good2 pins allow monitoring the status of VOUT1 and VOUT2 respectively. As shown in the right figure, P-Goodx pin is pulled up to 3.3V internally via output resistance of 1kΩ. P-Goodx pin outputs High when the converter is perf orming the assumed regulation, and Low when it is under the following conditions. -When the output is set to OFF by ON/OFFx pin or PM Bus communication -During turn-on delay -During turn-on rise -When protection functions such as overcurrent prot ection, under voltage lock out, output overvoltage protection etc. are in operation Note 1: P-Goodx pin may output High when input voltage turn-on up to operation starting voltage. P-Goodx pin output Pin voltage Remarks High 3.3V (±0.1V) Output resistance 1kΩ (±1%, ±100ppm/K) Low 0.4V max. 8-11 Operation state monitoring Input voltage, output voltage and output current of the product can be obtained via serial communication. Items Monitor accuracy Conditions Input voltage ±2.5% typ. Input voltage 12V Output voltage ±0.5% typ. Output voltage 800mV or more, 1200mV or less ±5mV typ. Output voltage 500mV or more, less than 800mV Output current ±5%FS *1 typ. Input voltage 12V, output voltage 1.0V, ambient temperature 25°C *1 Based on 100% output current.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 This product contains 6 status registers, STATUS_BY TE, STATUS_WORD, STATUS_VOUT, STATUS_IOUT, STATUS_INPUT, STATUS_TEMPERATURE. Error status of this product can be detected by monitoring the status registers. The status registers are set when the protection fe atures are activated during operation. Either one o f the items stated below can clear the status registers. -Execute the CLEAR_FAULTS command -Re-startup input -During automatic reset operation The contents of each register can be read out via serial communication. Refer to the command list for each register in details. Items PMBus/AVSBus commands Monitoring input voltage PMBus - READ_VIN Monitoring output voltage PMBus - READ_VOUT Monitoring output current PMBus - READ_IOUT STATUS_BYTE register PMBus - STATUS_BYTE STATUS_WORD register PMBus - STATUS_WORD STATUS_VOUT register PMBus - STATUS_VOUT STATUS_IOUT register PMBus - STATUS_IOUT STATUS_INPUT register PMBus - STATUS_INPUT STATUS_TEMPERATURE register PMBus - STATUS_TEMPERAT URE AVSBUS_STATUS register AVSBus - AVSBUS_STATUS 8-12 Under Voltage Lock Out (UVLO) This function prevents the product from malfunction ing when input voltage drops. When the input voltage becomes equal to or higher than the activation volt age, it prepares for switching operation to start and when the input voltage falls below the deactivation voltage it stops switching operation. Note: The status register (See section 9-6-5 , 9-6-6 , 9-6-9 ) of UVLO may be set depending on voltage tilt in degrees during power-up. 8-13 Input overvoltage protection Input voltage of 15V typ. or over activates the overvoltage protection feature that stops switching operation. Input voltage of 14V typ. or under restarts switching operation. Note: Refrain from inputting voltage that exceeds 14V which is out of specification. Protection will not activate when input voltage ex ceeds 14V and under 15V. 8-14 Output overvoltage protection When output voltage (between the +SENSE1 and –SENSE 1 pins) exceeds operation threshold of the output overvoltage protection feature, switching operation stops (shut down). This feature will not function if overvoltage state is caused due to breakage of the product. Threshold of the output overvoltage protection can be configured via PMBus communication. Item PMBus command Setting range Resolution Default setting Threshold of output overvoltage protection VOUT_OV_FAULT_LIMIT 500 to 1350mV 1mV 1350mV Note 1: Applications that require sudden load curre nt change may activate the output overvoltage protection depending on adjustment level of output voltage. To prevent this, output capacitors should be added. Note 2: You can retry the turn-on sequence by one of the following methods. -Execute the CLEAR_FAULTS command -Turn ON after setting to OFF by ON/OFF control (See section 8-7 ). -Re-startup input

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 8-15 Output overcurrent protection When output goes into an overcurrent state, switching operation will cease and restarts turn-on sequence after 100ms typ. Upon releasing the overcurrent state, switching operation will resume with output voltage. Note : Refrain from keeping an overcurrent state for a long time period. 9. PMBus communication 9-1 Definitions of Symbols and Terms The symbols and terms used in section 9 are defined as below Symbols or Terms Definition Byte 8 bits Word 16 bits (2 bytes) Set Set bit to logic “1” Clear Set bit to logic “0” nnb Number “nn” should be in a binary value nnh Number “nn” should be a value in hexadecimal no tation 9-2 Communication method PMBus interface of the product complies with PMBus Specification Revision1.3. 9-3 Communication pins The PMBus communication pins (SDA, SCL, SALRT) should be connected to a 3.3V power supply by using a pull-up resistor or its equivalent method. 3.3V BDX12-1.0S100 RM series SGND SCL SDA SCL SDA PMBus Master Device Other PMBus Device GND SALRT SALRT 9-3-1 SDA pin The SDA pin is a data input/output pin used for PMB us communication. The pin serves as an open drain output when data is output. Input Low level: 0.8V max. Input High level: 1.55V min. Output Low level: 0.4V max. (Sink current 4mA max. ） 9-3-2 SCL pin The SCL pin is a clock input pin used for PMBus com munication. The SCL pin does not get driven by the product but by a bus master device. Input Low level: 0.8V max. Input High level : 1.55V min. Input frequency: 50 to 1000 kHz

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 9-3-3 SALRT pin The SALRT pin is an abnormal signal output pin which serves as an open drain output. The pin is open in normal mode and low in abnormal mode. Output Low level: 0.4V max. (Sink current 4mA max.) 9-4 Device address setup Each device can be identified by a device address since multiple devices share the same bus in the PMBus protocol. A unique device address should be given in order to avoid device address duplication on the same bus. A device address can be specified by placing a resistor between the SA and SGND pins. The following table shows resistor values(Rsa) and their corresponding device addresses. Each resistor should have a 1% tolerance (E12 standard). A device address will be specified according to res istance value between the SA and SGND pins during power up. Thus input voltage requires to be set at 0V if you want to change a device address. Even when the communication feature is not used, make sure the SA pin is NOT OPEN. Device address Rsa [Ω] Device address Rsa [Ω] 1100 000 0 1010 000 1500 1100 001 180 1010 001 1800 1100 100 330 1010 100 2200 1100 101 470 1010 101 2700 1000 000 680 1011 000 3300 1000 001 820 1011 001 3900 1000 100 1000 1011 100 4700 1000 101 1200 1011 101 5600

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 9-5 Data format 9-5-1 Direct Format The data format comprises of elements indicated below. X: Actual value Y: Value using data word of the PMBus command (A 2-byte signed integer using two’s complement) m: Tilt coefficient b: Off set value R: Exponential * Refer to 9-6-1 for value of m, b, R. The formula below shows links between the elements. X = 1 m (Y × 10 −R – b) Y = (m X + b) × 10 R 9-6 VPMBus commands 9-6-1 PMBus command list The following PMBus commands can be used for this product. 1) VOUT1, VOUT2 in common PMBus commands Command codes Transaction type *1 Data length (Byte) Data format Unit Default setting PAGE 00h R/W Byte 1 ― ― 00h ON_OFF_CONFIG 02h R/W Byte 1 ― ― 16h CLEAR_FAULTS 03h Send Byte 0 ― ― ― STATUS_BYTE 78h Read Byte 1 ― ― ― STATUS_WORD 79h Read Word 2 ― ― ― STATUS_VOUT 7Ah Read Byte 1 ― ― ― STATUS_IOUT 7Bh Read Byte 1 ― ― ― STATUS_INPUT 7Ch Read Byte 1 ― ― ― READ_VIN 88h Read Word 2 Direct mV ― APPLY_SETTINGS E7h Write Word 2 ― ― ― RESTORE_CONFIG F2h Write Word 2 ― ― ―

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 2) VOUT1 PMBus commands Command codes Transaction type *1 Data length (Byte) Data format Unit Default setting OPERATION 01h R/W Byte 1 ― ― 00h VOUT_COMMAND 21h R/W Word 2 Direct mV 03E8h (1000mV) VOUT_TRIM 22h R/W Word 2 Direct mV 0000h (0mV) VOUT_MAX 24h R/W Word 2 Direct mV 04B0h (1200mV) VOUT_MIN 2Bh R/W Word 2 Direct mV 01F4h (500mV) VOUT_MARGIN_HIGH 25h R/W Word 2 Direct mV 04B0h (1200mV) VOUT_MARGIN_LOW 26h R/W Word 2 Direct mV 01F4h (500mV) VOUT_TRANSITION_RATE 27h R/W Word 2 Direct mV /µs 0064h (10mV/ µs) VOUT_OV_FAULT_LIMIT 40h R/W Word 2 Direct mV 0546h (1350mV) TON_DELAY 60h R/W Word 2 Direct ms 0014h (0.20ms) TON_RISE 61h R/W Word 2 Direct ms 03E8h (1.000ms) TOFF_DELAY 64h R/W Word 2 Direct ms 0000h (0.00ms) TOFF_FALL 65h R/W Word 2 Direct ms 03E8h (1.000ms) READ_VOUT 8Bh Read Word 2 Direct mV ― READ_IOUT 8Ch Read Word 2 Direct A ― 3) VOUT2 PMBus commands Command codes Transaction type *1 Data length (Byte) Data format Unit Default setting OPERATION 01h R/W Byte 1 ― ― 00h VOUT_COMMAND 21h R/W Word 2 Direct mV 03E8h (1000mV) VOUT_TRIM 22h R/W Word 2 Direct mV 0000h (0mV) VOUT_MAX 24h R/W Word 2 Direct mV 04B0h (1200mV) VOUT_MIN 2Bh R/W Word 2 Direct mV 01F4h (500mV) VOUT_MARGIN_HIGH 25h R/W Word 2 Direct mV 04B0h (1200mV) VOUT_MARGIN_LOW 26h R/W Word 2 Direct mV 01F4h (500mV) VOUT_TRANSITION_RATE 27h R/W Word 2 Direct mV /µs 000Ah (1mV/ µs) VOUT_OV_FAULT_LIMIT 40h R/W Word 2 Direct mV 0546h (1350mV) TON_DELAY 60h R/W Word 2 Direct ms 0014h (0.20ms)

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 TON_RISE 61h R/W Word 2 Direct ms 03E8h (1.000ms) TOFF_DELAY 64h R/W Word 2 Direct ms 0000h (0.00ms) TOFF_FALL 65h R/W Word 2 Direct ms 03E8h (1.000ms) READ_VOUT 8Bh Read Word 2 Direct mV ― READ_IOUT 8Ch Read Word 2 Direct A ― *1) The proper names of data formats in the transaction type indicated in the previous page are described below. Transaction type Communication protocol Send Byte Send Byte Protocol Read Byte Read Byte Protocol Read Word Read Word Protocol Write Word Write Word Protocol R/W Byte Read Byte Protocol and Write Byte Protocol R/W Word Read Word Protocol and Write Word Protocol 9-6-2 PAGE command (00h) This is used for switching control objects of commands which are described in 9-6-1 -2) 3). Meanings of each bit are described as below. Bit No. Purpose Value Description Default setting 7-0 To switch the separate commands of VOUT1, VOUT2 control object 00000000 VOUT1 ●

00000001 VOUT2

9-6-3 ON_OFF_CONFIG command (02h) This command is used to set the ON/OFF control operations. Meanings of each bit are described below. Bit No. Purpose Value Description Default setting 7–5 — 000 Unavailable ● 4-2 To select “ENABLE” or “DISABLE” of the ON/OFF control 000 Select “Disable” of the ON/OFF control via PMBus communication and ON/OFF1 pin (Always set to ON) 101 “Enable” ON/OFF1 pin, “Disable” PMBus communication 110 “Disable” ON/OFF1 pin, “Enable” PMBus communication 111 “Enable” ON/OFF1 pin and PMBus Communication *1 1 — 1 Positive logic (Output is ON when opened) ●

0 To select “ENABLE” or

“DISABLE” of turn-off sequence when output is turned off via the ON/OFF1 pin

0 Output is turned off via a sequence

configured by TOFF_DELAY and TOFF_FALL.

1 Switching stops immediately

*1 ON/OFF control by ON/OFF1 pin, PMBus communication is AND operation (see 8-7-2 ).

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 9-6-4 CLEAR_FAULTS command (03h) This is a command to clear all the bits in a status register. If executed after the output overvoltage protection function is activated, the turn-on sequence will be retried. This command is used only to clear all the bits in a status register therefore contents of the status register remains until the causes are removed. 9-6-5 STATUS_BYTE command (78h) This command is used to read the STATUS_BYTE register. Meanings of each bit are described below. Bit No. Bit name Description 7 — Undisclosed

6 OFF 1 when output is OFF (OFF by protection featu res as well as

the ON/OFF control)

5 VOUT_OV_FAULT 1 when overvoltage protection is ac tivated

4 IOUT_OC_FAULT 1 when overcurrent protection is ac tivated

( 0 during retry of turn-on sequence ）

3 VIN_UV 1 when under voltage lock out is activated

2 — Undisclosed 1 — Undisclosed 0 — Undisclosed 9-6-6 STATUS_WORD command (79h) This command is used to read the STATUS_WORD register. Meanings of each bit are described below. Bit No. Bit name Description

15 VOUT 1 when one of the STATUS_VOUT register bits is 1

14 IOUT 1 when one of the STATUS_IOUT register bits is 1

13 INPUT 1 when one of the STATUS_INPUT register bi ts is 1

12 — Undisclosed 11 POWER_GOOD# Negative logic signal. 1 under condi tions that P-Good pin becomes low. 10 — Undisclosed 9 — Undisclosed 8 — Undisclosed 7 — Undisclosed the ON/OFF control)

5 VOUT_OV_FAULT 1 when output overvoltage protection is activated

4 IOUT_OC_FAULT 1 when output overcurrent protection is activated

(0 during retry of turn-on sequence) 2 — Undisclosed 1 — Undisclosed 0 — Undisclosed 9-6-7 STATUS_VOUT command (7Ah) This command is used to read the STATUS_VOUT register. Meanings of each bit are described below. Bit No. Description 7 1 when output overvoltage protection is activated 6-0 Undisclosed

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 9-6-8 STATUS_IOUT command (7Bh) This command is used to read the STATUS_IOUT register. Meanings of each bit are described below. Bit No. Description 7 1 when output overcurrent protection is activated (0 during retry of turn-on sequence) 6-0 Undisclosed 9-6-9 STATUS_INPUT command (7Ch) This command is used to read the STATUS_INPUT register. Meanings of each bit are described below. Bit No. Description 7 1 when input overvoltage protection is activated

6 Undisclosed

5 Undisclosed

4 1 when under voltage lock out is activated

3 Undisclosed

2 Undisclosed

1 Undisclosed

0 Undisclosed

9-6-10 READ_VIN command (88h) This command is used to read input voltage. 9-6-11 APPLY_SETTINGS command (E7h) This command is to apply the change contents after changing the setting of a specific command. After changing the setting of the commands below, it is necessary to write 0001h with the APPLY_SETTINGS command. VOUT_TRANSITION_RATE VOUT_OV_FAULT_LIMIT TON_RISE TOFF_FALL 9-6-12 RESTORE_CONFIG command (F2h) This command copies the setting value of the user store memory to the operating memory. Meanings of each bit are described below. Bit No. Purpose Value

Description

7-4 — 0h Unavailable 3-0 Specify Configuration ID (Refer to 8-1-1 0h Configuration ID 0 1h Configuration ID 1 2h Configuration ID 2 3h Configuration ID 3 4h Configuration ID 4 5h Configuration ID 5 7h Configuration ID 7

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 9-6-13 OPERATION command (01h) This command is used for the ON/OFF control and to select the output voltage command to be used. Meanings of each bit are described below. Bit No. Purpose Value Description Default setting 7-6 ON/OFF control 00 Switching stops immediately ●

01 Output is turned off via a sequence configured b y

TOFF_DELAY and TOFF_FALL

10 Output ON

5-2 Select the output voltage command to be used

0000 PMBus - VOUT_COMMAND command

(Margin OFF)

0110 PMBus - VOUT_MARGIN_LOW command

(Margin Low)

1010 PMBus - VOUT_MARGIN_HIGH command

(Margin High)

1110 AVSBus - TARGET_RAIL_VOLTAGE

1 Copy of AVSBus -

TARGET_RAIL_VOLTAGE command value

1 When the output voltage setting has been

changed by AVSBUS -TARGET_RAIL_VOLTAGE command, the setting value of TARGET_RAIL_VOLTAGE will be copied to PMBus - VOUT_COMMAND command value.

0 Do not change command value of PMBus -

VOUT_COMMAND 0 — 0 Unavailable ● A bit combination other than one of those specified above is not defined. If the ON/OFF control is disabled via PMBus communi cation using the ON_OFF_CONFIG command, the ON/OFF feature can not be controlled via this command. 9-6-14 VOUT_COMMAND command (21h) This command is used to configure output voltage when Margin state is Margin OFF. 9-6-15 VOUT_TRIM command (22h) This command is used to set output voltage trimming. 9-6-16 VOUT_MAX command (24h) This command is used to set a maximum limit of output voltage. 9-6-17 VOUT_MIN command (2Bh) This command is used to set a minimum limit of output voltage. 9-6-18 VOUT_MARGIN_HIGH command (25h) This command is used to set output voltage when Margin state is Margin High. 9-6-19 VOUT_MARGIN_LOW command (26h) This command is used to set the output voltage when Margin state is Margin Low. 9-6-20 VOUT_ TRANSITION_RATE command (27h) This command is used to set the output voltage change rate during operation. After writing this command, it is necessary to writ e 0001h with the APPLY_SETTINGS command (See section 9-6-11 ).

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 9-6-21 VOUT_OV_FAULT_LIMIT command (40h) This command is used to set a threshold of the output overvoltage protection. After writing this command, it is necessary to writ e 0001h with the APPLY_SETTINGS command (See section 9-6-11 ). 9-6-22 TON_DELAY command (60h) This command is used to set turn-on delay. 9-6-23 TON_RISE command (61h) This command is used to set turn-on rise. After writing this command, it is necessary to writ e 0001h with the APPLY_SETTINGS command (See section 9-6-11 ). 9-6-24 TOFF_DELAY command (64h) This command is used to set turn-off delay. 9-6-25 TOFF_FALL command (65h) This command is used to set turn-off fall. After writing this command, it is necessary to writ e 0001h with the APPLY_SETTINGS command (See section 9-6-11 9-6-26 READ_VOUT command (8Bh) This command is used to read output voltage. 9-6-27 READ_IOUT command (8Ch) This command is used to read output current. 10. AVSBus communication 10-1 Definitions of Symbols and Terms The symbols and terms used in section 10 are defined as below. Symbols or Terms Definition Byte 8 bits Word 16 bits (2 bytes) Set Set bit to logic “1” Clear Set bit to logic “0” nnb Number “nn” should be in a binary value nnh Number “nn” should be a value in hexadecimal no tation 10-2 Communication method AVSBus interface of this product complies with PMBus Specification Revision 1.3 – Part III (AVSBus).

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 10-3 Communication pins Connect the AVSBus communication pins (AVS_CLK, AVS_MDA, AVS_SDA) to the AVSBus master device as shown below (AVSBus 3 - Wire Mode Connections). Also, please connect the reference voltage pin AVS_VDDIO to a power suppl y of 0.9 to 3.63V. 10-3-1 AVS_MDA pin The AVS_MDA pin is a data input pin used for AVSBus communication. Input High level threshold: 0.6V × AVS_VDDIO min. Input Low level threshold: 0.4V × AVS_VDDIO max. 10-3-2 AVS_CLK pin The AVS_CLK pin is a clock input pin used for AVSBus communication. The AVS_CLK pin does not get driven by the product but by the AVSBus master device. Input High level threshold: 0.6V × AVS_VDDIO min. Input Low level threshold: 0.4V × AVS_VDDIO max. Input frequency: 5 to 50 MHz 10-3-3 AVS_SDA pin The AVS_SDA pin is a data input pin of push-pull output. Output High level: 0.8V × AVS_VDDIO min. Output Low level: 0.2V × AVS_VDDIO max. 10-4 AVSBus commands 10-4-1 AVSBus command list The AVSBus commands shown below can be used for this product. AVSBus commands <CmdDataType> <Cmd> <RailSel> TARGET_RAIL_VOLTAGE 0000b 11b: Read 00b: Write 0000b: VOUT1 0001b: VOUT2 TRANSITION_RATE 0001b 11b: Read 00b: Write 0000b: VOUT1 0001b: VOUT2 RAIL_CURRENT 0010b 11b: Read 0000b: VOUT1 0001b: VOUT2 VOLTAGE_RESET 0100b 00b: Write 0000b: VOUT1 0001b: VOUT2 AVSBUS_STATUS 1110h 11b: Read 0000b

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 10-4-2 TARGET_RAIL_VOLTAGE command (0000b) This command is used for setting the output voltage. In order to control the output voltage with this command, it is necessary to set the output voltage command used in the PMBus - OPERATION command to the AVSBus – TARGET_RAIL_VOLTAGE (See section 9-6-13 ). The <CmdData> field is a 16 bi t unsigned integer ( unit: mV). 10-4-3 TRANSITION_RATE command (0001b) This command is used to set the output voltage transition rate during operation. Meanings of each bit of the <CmdData> field are described below. Bit No. Purpose Value 15-8 Setting transition rate when output voltage rises 8 bit unsigned integer (Unit: mV/ μs) 7-0 Setting transition rate when output voltage drops 8 bit unsigned integer (Unit: mV/ μs) 10-4-4 RAIL_CURRENT command (0010b) This command is used to read the output current. The <CmdData> field is a 16 b it unsigned inte ger (VOUT1 unit: 20×mA, VOUT2 unit: 30×mA). 10-4-5 VOLTAGE_RESET command (0100b) This command will copy PMBus - VOUT_COMMAND command value to TARGET RAIL VOLTAGE command value. The <CmdData> field should be 0000h. 10-4-6 AVSBUS_STATUS command (1110b) This command is used to read the AVSBUS_ STATUS reg ister. AVSBUS_ STATUS register is common to VOUT1 and VOUT2. Meanings of each bit of the <CmdData> field are described below. Bit No. Bit name Description

15 VDONE 1 when output voltage reaches the output v oltage setting

14-0 ― Undisclosed

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 11. Reverse polarity protection at the input (Example) Inadvertently, reversing the polarity of the input connected to the product can lead to product damage. If there is a possibility that the polarity reversal may occur, add a protection circuit to the product. The figure below is an example of a protection circuit using a fuse and diode. Vout Load C2 Vin D1+Vin FUSE BDX12-1.0S100RM series GND +SENSE1 -SENSE1 12. Overvoltage protection (Example) The product comes with a built-in overvoltage protection function. However, if switch element in the product is damaged when in short circuit mode, the DC input voltage might still be delivered directly to the o utput side. Thus, an input shutoff circuit needs to be ad ded to the product to prevent it from becoming dama ged when in overvoltage mode. Vout Load C2 Vin SCR +Vin FUSE BDX12-1.0S100RM series GND +SENSE1 Overvoltage detection circuit -SENSE1 Note1: If the converter is damaged when in overvoltage mode, the ON/OFF control can not be operated. Note2: If there is an ON/OFF feature for power source of the converter, the function can be used. Note3: Allow enough capacity in the DC power supply for a fuse to blow.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 13. Mounting requirements The following conditions will apply to soldering temperature, time and storing before mounting. Re-flow method - Pre-heat temperature: 150 to 180°C, 120s max. (S ee the figure below) - Peak temperature: 250°C max. 220°C or over, 60s max. - BDX12-1.0S100RM Re-flow count: Once After mounting the converter onto a board, reflow can not be made again by turning over the mounted boards. - BDX12-1.0S50R0S Re-flow count: Twice Refrain from giving vibrations during reflow, for it may cause converter components to move. Flow mounting is not possible for the product. 180°C 150°C 60 to 120s 60s max. 220°C Peak 250°C max. Time Temperature 13-1 Storage before mounting Humidity control level for the product is JEDEC MSL3. If a dry pack is opened, store at an ambience below 30°C/60%R.H. If the product is kept in an unopened package for one year or kept in an opened dry package at an ambience below 30°C/60%R.H. for more than 168 hours, baking (125°C±5°C/24h) is required before reflow process. After mounting the product, handle it in accordance with the storage requirements. 14. Vibration and Shock Testing Vibration: 5 to 10Hz, Total amplitude 10mm, 10 to 5 5Hz, Acceleration 2G (One hour for each of the thr ee directions) Shock: Acceleration 20G (three times for each of the three directions), Shock time 11 ± 5ms 15. Cleaning The product is not for immersible cleaning. Use of no-clean flux is recommended.

Digital Control ・・ ・・Non-Isolated POL DC-DC Converter BDX Series Bellnix DC-DC Converter BDD20190530_C02 16. Precautions for use To ensure user’s safety, check specifications befor e using the product and always observe the followin g precautions for use. - The product is intended for use in general electr onics equipment (office equipment, communication equipment, measurement equipment). Do not use the p roduct for medical equipment, nuclear equipment, trains, etc., whereby human life or prop erty may be directly affected by a damaged product. Consult with us for any use other than for such general electronics equipment - Minor changes and component parts changes that do not affect contents of the specifications will be made due to characteristic improvement of the product and other reasons without prior notice. - The product is not suitable for series operation. - Do not use connectors and sockets for mounting th e product. Contact resistance may have an adverse effect on the performance. Use soldering method for mounting on a printed circuit board. - The product supports for high current. Pattern or wiring can become higher temperature when current gets large. Current value must take sufficient meas ures when setting an evaluation environment and when designing the surrounding layout etc. - The product has a built-in overcurrent protection circuit but avoid a prolonged short circuit state which may lead to failure. - The product may be damaged if used under nonstand ard electrical conditions or nonstandard environmental conditions including temperature. Ensure use within the standards. - Avoid storing or using the product in a place that generates corrosive gas or dust. - The product may be damaged by static electricity. Make sure that the workplace is guarded against static buildup and static electricity on operators by use of proper grounding. - A fuse mechanism is not built in the product. Con nect a fuse to the + input line to guard against excessive input current under abnormal circumstances. Allow enough capacity in the power supply for a fuse to blow. - The product has overvoltage protection. If overvo ltage occurs due to abnormality in the module, inpu t voltage is output, as is, in the same mode, which m ay result in fumes and ignition. Make sure that an overvoltage protection circuit is added to prevent it from occurring. - The product does not come with a test report. - The product is subject to the license from Power- one which is related to the patented digital power technology owned by Bel Fuse Inc. 17. Warranty The warranty term of the product is one year after shipment. Should the product become defective withi n the warranty period due to our design or workmanship, the product will be repaired free of charge or replaced. However, this warranty does not cover products whic h have been subjected to unauthorized inner modifications, etc. The scope of our warranty is limited to that of the said product. 18. Contact If you have any further technical questions for this product, please contact us. E-mail: info@bellnix.com URL: http://www.bellnix.com