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September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter
FEATURES
Industry standard footprint (2 inch X 1 inch) Regulated Outputs, Fixed Switching Frequency Up to 88 % Efficiency 4:1 Input Range Up to 15 Watts of Power -40°C to +85°C temperature range Remote On/Off logic control (Option) No Tantalum Capacitors Continuous Short Circuit and Over Current Protection PRODUCT OVERVIEW The AT series offer up to 15 watts of output power in standard 2 .00 x 1.00 x 0.4 inches packages. This series features high efficiency and 1500 Volts of DC isolation. The AT series provides a 4:1 wide input voltage range of 9 to 36 or 18 to 75VDC, and delivers accurate regulated output. Th ese modules operate over the ambient operating temperature range of – 40°C to +85°C. These converters are fully protected against input UVLO (Under Voltage Lock Out), over-current, over -voltage and continuous short circuit protection. In addition, the option control functions include Positive R emote On/Off and adjustable out put voltage. APPLICATIONS: Distributed Power Architecture Mobile telecommunication Industrial applications Battery operated equipment AVAILABLE OPTIONS Customizable output voltages CE Mark 2004/108/EC certification UL60950-1, EN60950- 1, and IEC60950- 1 safety Contact DATEL for other series in 2 .00" x 1.00" footprint Cost Savings , Lower Power, Other Voltage outputs, Higher Efficiency , etc. MODEL NUMBER INPUT VOLTAGE OUTPUT VOLTAGE OUTPUT CURRENT MAX EFFICIENCY % LOAD REGULATION OPTION AT22S3.3-4 9-36 VDC 3.3VDC 4 A 87 ± 0.2 % P, T AT22S5-3 9-36 VDC 5.0 VDC 3 A 87 ± 0.2 % P, T AT22S12-1.25 9-36 VDC 12 VDC 1.25 A 87 ± 0.2 % P, T AT22S15-1 9-36 VDC 15 VDC 1 A 88 ± 0.2 % P, T AT22D5-1.5 9-36 VDC ±5 VDC ±1.5 A 85 ±1 % P, T AT22D12-0.62 9-36 VDC ±12 VDC ±0.62 A 87 ±1 % P, T AT22D15-0.5 9-36 VDC ±15 VDC ±0.5 A 88 ±1 % P, T AT45S3.3-4 18-75VDC 3.3 VDC 4 A 88 ± 0.2 % P, T AT45S5-3 18-75VDC 5 VDC 3 A 88 ± 0.2 % P, T AT45S12-1.25 18-75VDC 12 VDC 1.25 A 87 ± 0.2 % P, T AT45S15-1 18-75VDC 15 VDC 1 A 87 ± 0.2 % P, T AT45D5-1.5 18-75VDC ±5 VDC ±1.5 A 85 ±1 % P, T AT45D12-0.62 18-75VDC ±12 VDC ±0.62 A 87 ±1 % P, T AT45D15-0.5 18-75VDC ±15 VDC ±0.5 A 87 ±1 % P, T FUNCTIONAL BLOCK DIAGRAM Page 1 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter ABSOLUTE MAXIMUM RATINGS Parameters Conditions Model Min. Typical Max. Units Input Voltage Continuous DC 24Vin 0 36 Volts 48Vin 0 75 Transient 100ms, DC 24Vin 50 Volts 48Vin 100 Operating Ambient Temperature Derating, Above 78℃ All -40 +85 ℃ Case Temperature All +105 ℃ Storage Temperature All -55 +125 ℃ Input / Output Isolation Voltage 1 minute All 1500 Volts INPUT CHARACTERISTICS Note: All specifications are typical at nominal input, full load at 25 ℃ unless otherwise noted Parameters Conditions Model Min. Typical Max. Units Operating Input Voltage 24Vin 9 24 36 Volts 48Vin 18 48 75 Maximum Input Current 100% Load, Vin =9V 24Vin 2100 mA 100% Load, Vin =18V 48Vin 1000 No-Load Input Current Vin =Nominal input AT22S3.3-4 60 mA AT22S5-3 70 AT22S12-1.25 30 AT22S15-1 A22D5-1.5 30 AT22D12-0.62 30 AT22D15-0.5 30 AT45S3.3-4 40 AT45S5-3 40 AT45S12-1.25 20 AT45S15-1 AT22D5-1.5 20 AT45D12-0.62 20 AT45D15-0.5 20 Off Converter Input Current Shutdown input idle current All 4 10 mA Inrush Current (I 2t) AT per ETS300 132 -2 All 0.1 A2s Input Reflected -Ripple Current P-P thru 12uH inductor, 5Hz to 20MHz All 30 mA Page 2 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter OUTPUT CHARACTERISTIC Parameters Conditions Model Min. Typical Max. Units Output Voltage Set Point Vin =Nominal Vin , Io = Io_max, Tc=25℃ Vo=3.3 3.2505 3.3 3.3495 Volts Vo=5.0 4.925 5 5.075 Vo=12 11.82 12 12.18 Vo=15 Vo=±5 14.775 ±4.925 15.225 ±5.075 Output Voltage Balance Vin =nominal, Io= Io_max, Tc=25℃ Dual ±2.0 % Output Voltage Regulation Line Regulation Vin =High line to Low line Full Load Single ±0.2 % % Dual ±0.5 Load Regulation Io = Full Load to min. Load Single ±0.2 % % Dual ±1.0 Temperature Coefficient TC=-40℃ to 80℃ ±0.03 %/℃ Cross Regulation Load cross variation 10%/100% Dual ±5 % Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth Peak-to-Peak Full Load, 20MHz bandwidth 0.1uF ceramic capacitor Vo=3.3V Vo=5V Vo=±5V mV Vo=15V Vo=12V Vo=±15V Vo=±12V 100 Operating Output Current Range Vo=3.3V 0 4000 mA Vo=5V 0 3000 Vo=12V 0 1250 Vo=15V Vo=±5V 1000 ±1500 Vo=±12V 0 ±625 Vo=±15V 0 ±500 Output DC Current -Limit Inception Output Voltage=90% VO, nominal All 110 140 160 % Maximum Output Capacitance Full load, Resistance Vo=3.3V Vo=5V Vo=12V Vo=15V Vo=±5V Vo=±12V Vo=±15V 4000 3000 1250 1000 1500 625 470 µF DYNAMIC CHARACTERISTICS Parameters Conditions Model Min. Typical Max. Units Output Voltage Current Transient Step Change in Output Current 75% to 100% of I o_max di/dt=0.1A/us All ±5 % Setting Time (within 1% Vo nominal) All 250 µs Turn-On Delay and Rise Time Turn-On Delay Time, From Input Vin _min to 10%Vo_set Vin=24V Vin=48V 10 10 ms Turn-On Delay Time, From On/Off Control Von/off to 10%Vo,set All 10 ms Output Voltage Rise Time 10% Vo_set to 90% Vo_set Vin=24V Vin=48V 10 10 ms Page 3 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter FEATURE CHARACTERISTICS Parameters Conditions Model Min. Typical Max. Units Efficiency 100% Load Vin =24 Vdc, Io = Io_max, Tc=25℃ AT22S3.3-4 87 AT22S5-3 87 AT22S12-1.25 87 AT22S15-1 AT22D5-1.5 88 AT22D12-0.62 87 AT22D15-0.5 88 Vin =48 Vdc, Io = Io_max, Tc=25℃ AT45S3.3-4 88 AT45S5-3 88 AT45S12-1.25 87 AT45S15-1 AT45D5-1.5 87 AT45D12-0.62 87 AT45D15-0.5 87 ISOLATION CHARACTERISTICS Input to Output 1 minutes All 1500 Volts Isolation Resistance All 1000 MΩ Isolation Capacitance All 1000 pF Switching Frequency Vin=24V 400 KHz Vin=48 400 On/Off Control (Option P) , Positive Remote On/Off logic Logic High (Module On) Von/off at Ion/off=0.1uA All 3.5 or Open Circui t
75 Volts
Logic Low (Module O n) Von/off at Ion/off=0.1uA All 1.2 Volts Output Voltage Trim range (Option T) At rated Power All -10 +10 % ON/OFF Current Ion/off at Von/off=0.0V 0.3 1 mA Leakage Current Logic High, Von/off=15V 30 µA Output Over Voltage Protection Zener or TVS Clamp Vo=3.3V 3.9 VDC Vo=5V 6.2 Vo=12V 15 Vo=15V 18 Vo=±5V ±6.2 Vo=±12V ±15 Vo=±15V ±18 MTBF Io =100%of Io_max;Ta=25℃ per MIL-HDBK-217F All TBD M hours Weight All 35 grams Page 4 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Operating Temperature Range The AT series of converters operates over the wide temperature of -405℃ to +85℃. This module starts to derate above +78℃. The module operate normally up to + 105℃ case temperature. Output Voltage Adjustment The output voltage on the T option models is adjustable within the range of -10% to +10%. Remote ON/OFF (Option) Module with option P has Remote On/Off function. This feature allows the user to switch the module on and off electronically. All models are available in “positive logic” versions. The converter turns on if the remote ON/OFF pin is high (>3.5Vdc or open circuit). Setting the pin low (<1.2Vdc) will turn the converter off. The signal level of the remote on/off input is defined with respect to ground. If not using the remote on/off pin, leave the pin open (converter will be on). UVLO (Under Voltage Lock Out) Input under voltage lockout is standard on the AT unit. The unit will shut down when the input voltage drops below a threshold, and the unit will operate when the input voltage goes above the upper threshold. Over Current Protection All models have internal over current and continuous short circuit protection. The unit operates normally once the fault condition is removed. At the point of current limit inception, the converter w ill go into hiccup mode protection. Over Voltage Protection The over-voltage protection consists of a Z ener diode to limit the output voltage. Recommended Layout PCB Footprints and Soldering Information The end user of the converter must ensure that other components and metal in the vicinity of the converter meet the sp acing requirements to which the system is approved. Low resistance and low inductance PCB layout traces should be used where possible. Careful consideration must also be given to proper low impedance tracks between power module, input and output grounds. The recommended footprints and soldering profiles are shown in the next two figures Recommended PCB Layout Footprints , Dimensions are in inches (mm) Wave Soldering P rofiles Note： 1. Soldering Materials: Sn/Cu/N i 2. Ramp up rate during preheat: 1.4 ℃ /Sec (From 50 ℃ to 100℃) 3. Soaking temperature: 0.5 ℃/Sec (From 100 ℃ to 130℃), 60±20 seconds 4. Peak temperature: 260 ℃, above 250℃ 3~6 Seconds 5. Ramp up rate during cooling: - 10.0 ℃/Sec (From 260 ℃ to 150℃) 100 200 300 0 50 100 150 Temperature ( C ) Time (Seconds) Lead Free Wave Soldering Profile Page 5 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter AT Series power de-rating Curves Note that the converter o perating ambient temperature r ange is -40℃ to + 85℃ with derating above + 78℃. Also, maximum c ase temperature under any operating condition should not exceed +105℃. Page 6 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Efficiency vs. Load Curves Page 7 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Page 8 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Page 9 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Input Capacitance at the Converter In order to avoid problems with loop stability , the converter must be connected to a low impedance AC source and a low inductance source. The input capacitors (Cin) should be placed close to the converter input pins to de -couple distribution inductance. The external input capacitors should have low ESR in order to quiet any ripple. Circuit AT shown in the figure below represents typical meAT urement methods for reflected ripple current. The capacitor C1 and inductor L1 simulate the typical DC source impedance. The input reflected -ripple current is measured by a current probe oscilloscope with a simulated source Inductance (L1). L1: 12uH C1: None Cin: 33µF ESR < 0.7ohm @100KHz Input Reflected -Ripple Test Setup Test Set-Up The basic test set-up to measure efficiency, load regulation , line regulation and other parameters is shown in the next figure . When testing the converter under any transient conditions , the user should ensure that the transient response of the source is sufficient to p ower the equipment under test. Below is the calculation of : 1- Efficiency 2- Load regulation 3- Line regulation The value of efficiency is defined AT: %100×× ININ OO IV IVη Where VO is output voltage, IO is output current, VIN is input voltage, IIN is input current. The value of load regulation is defined AT : %100. ×−= NL NLFL V VVregLoad Where VFL is the output voltage at full load VNL is the output voltage at 10% load The value of line regulation is defined AT : %100. ×−= LL LLHL V VVregLine Where V HL is the output v oltage of the maximum input voltage at full load. VLL is the output voltage of the minimum input voltage at full load. AT Series Test Setup Output Voltage Adjustment (T-Option) In order to trim the voltage up or down , the user needs to connect the trim resistor either between the trim pin and - Vo for trim -up and between trim pin and +Vo for trim-down. The output voltage trim range is ±10%. This is shown in the next two figures : +Vin R trim-up R-Load Trim +Vo -Vin -Vo Trim-up Voltage Setup +Vin -Vin -Vo +Vo R trim-down R-Load Trim Trim-down Voltage Setup Page 10 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter 1. The value of R trim-up is defined as: Where R trim-up is the external resistor in Kohm. VO, nom is the nominal output voltage. VO is the desired output voltage. R1, R2, R3, Rt and Vr are internal to the unit and are defined in the table below Trim up and Trim down Resistor Values Model Number Output Voltage(V) (KΩ) (KΩ) (KΩ) Rt (KΩ) Vr (KΩ) AT22S3.3-4 AT22S5-3 AT22S12-1.25 AT22S15-1 AT22D5-1.5 AT22D12-0.62 AT22D15-0.5 For example, to trim -up the output voltage of the 5.0 Volts module (AT22S5-3) by 10% to 5.5V, R trim-up is calculated as follows: Vo – Vo, nom = 5.5 – 5.0 = 0.5V R1 = 2.32 KΩ R2 = 2.32 KΩ R3 = 0 KΩ Rt = 8.2 KΩ, Vr= 2.5 V 2. The value of R trim-down defined as : Where Rtrim-down is the external resistor in Kohm. VO, nom is the nominal output voltage. VO is the desired output voltage. R1, R2, are internal to the unit and are defined in the table below. Where R trim-up is the external resistor in Kohm. VO, nom is the nominal output voltage. VO is the desired output voltage. R1, R2, R3, Rt and Vr are internal to the unit and are defined in the table above Trim down Resistor Values For example, to trim -down the output voltage of 5.0V module (AT22S5-3) by 10% to 4.5V, R trim-down is calculated as follows: VO,nom – Vo = 5.0 – 4.5 = 0.5V R1 = 2.32 KΩ R2 = 2.32 KΩ R3 = 0 KΩ Rt = 8.2 KΩ Vr= 2.5 V Noise Measurement and Output Ripple The test set -up for noise and ripple meas urements is shown in the figure below . A coaxial cable w as used to prevent impedance mismatch reflections disturbing the noise readings at higher frequencies. Measurements are taken with the output appropriately loaded and all ripple/noise specifications are from 0 Hz to 20MHz Bandwidth. +Vin -Vin -Vo +Vo R-LoadC2Vin BNC To Scope Output Voltage Ripple and Noise Measurement Set-Up Note: C1: None C2: 0.1µF ceramic capacitor Output Capacitance This series of converters provide s unconditional stability with or without external capacitors. For good transient response, low ESR output capacitors should be located close to the point of load. Page 11 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter SAFETY and EMC Input Fusing and Safety Considerations The AT series of converters do not have an internal fuse. However, to achieve maximum safety and system protection, always use an input line fuse. DATEL recommended a time delay fuse of 4A for 24Vin models and 2A for 48Vin modules. The circuit in the figure below is recommended by a Transient Voltage Suppressor diode across the input terminal to protect the unit against surge or spike voltage and input reverse voltage. Input Protection Circuit EMC Considerations EMI Test standard: EN55022 Class A and B Conducted Emission Test Condition: Input Voltage: Nominal, Output Load: Full Load (1) EMI and conducted noise meet EN55022 Class A: Connection circuit for conducted EMI testing Note: To meet EN55022 Class A without capacitor to the input pin. Page 12 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Page 13 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter Page 14 of 15
September 17, 2017 A.03 AT SERIES (2” x 1” Package) Up to 15 Watt DC-DC Converter MECHANICAL DIMENSIONS Inches (mm) PIN CONNECTIONS Pin Connections PIN SINGLE OUTPUT DUAL OUTPUT 1 - V Input - V Input 2 + V Input + V Input 2 + V Output + V Output
4 No Pin or Trim (option T) Common
6 No Pin or Remote (option) No Pin or Remote (option)
PART NUMBER AND ORDERING INFORMATION Family, Form Factor Package AT Nominal Input Voltage Number of Outputs S Voltage Output Current Output (A) (9-36) 22 Volts (18-75) 45 Volts S - Single D - Dual For proper part ordering, enter option suffixes in order listed in table above
3.3 Volts
5 Volts
12 Volts
15 Volts
±5 Volts ±12 Volts ±15 Volts
3.3 Volts – 3A
5 Volts - 3A
12 Volts – 1.25A
15 Volts – 1A
±5 Volts - ±1.5A ±12 Volts - ±0.62A ±15 Volts - ±0.5A P, T Option None – Standard without Remote On/Off or Output Trim P – Positive Remote T – Output Trim Option Page 15 of 15