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January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter
FEATURES
Industry standard footprint (2 inch X 1 inch) Regulated Outputs, Fixed Switching Frequency Up to 92 % Efficiency 4:1 Input Range Up to 30 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 30 watts of output power in standard 2 .00 x 1.0 0 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 (U nder 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 output 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 LINE REGULATION AT22S5-6 9-36 VDC 5.0 VDC 6 A 89 ± 0.5 % ± 0.2 % AT22S12-2.5 9-36 VDC 12 VDC 2.5 A 91 ± 0.5 % ± 0.2 % AT22S15-2 9-36 VDC 15 VDC 2 A 91 ± 0.5 % ± 0.2 % AT22D12-1.25 9-36 VDC ±12 VDC ±1.25 A 87 ±1 % ± 0.5 % AT22D15-1 9-36 VDC ±15 VDC ±1 A 88 ±1 % ± 0.5 % AT45S5-6 18-75VDC 5 VDC 6 A 89 ± 0.5 % ± 0.2 % AT45S12-2.5 18-75VDC 12 VDC 2.5 A 91 ± 0.5 % ± 0.2 % AT45S15-2 18-75VDC 15 VDC 2 A 92 ± 0.5 % ± 0.2 % AT45D12-1.25 18-75VDC ±12 VDC ±1.25 A 91 ±1 % ± 0.5 % AT45D15-1 18-75VDC ±15 VDC ±1 A 92 ±1 % ± 0.5 % FUNCTIONAL BLOCK DIAGRAM Page 1 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 3800 mA 100% Load, Vin =18V 48Vin 1900 No-Load Input Current Vin =Nominal input AT22S3.3-7.5 100 mA AT22S5-6 110 AT22S12-2.5 50 AT22S15-2 50 AT22D12-1.25 60 AT22D15-1 60 AT45S3.3-7.5 50 AT45S5-6 50 AT45S12-2.5 30 AT45S15-2 30 AT45D12-1.25 40 AT45D15-1 40 Input Under Voltage Lockout Turn-On Voltage Threshold 24Vin
48 Vin
16.5 8.5 8.8 17.5 VDC VDC Turn-Off Voltage Threshold 24Vin 7.7 15.5 8.5 8.8 16.5 VDC VDC Lockout Hysteresis Voltage 24Vin 48 Vin 0.5
0.9 VDC
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 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 3.267 3.3 3.333 Volts Vo=5.0 4.95 5 5.05 Vo=12 11.88 12 12.12 Vo=15 14.85 15 15.15 Output Voltage Balance Vin =nominal, Io= Io_max, Tc=25℃ Dual ±1.0 % 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 ±0.5 % % Dual ±1.0 Temperature Coefficient TC=-40℃ to 80℃ ±0.02 %/℃ 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 mV Vo=12V Vo=15V Vo=±15V Vo=±12V 100 Operating Output Current Range Vo=3.3V 0 7500 mA Vo=5V 0 6000 Vo=12V 0 2500 Vo=15 0 2000 Vo=±12V 0 ±1250 Vo=±15V 0 ±1000 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=±12V Vo=±15V 7500 6000 2500 2000 1250 1000 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 3 3 ms Turn-On Delay Time, From On/Off Control Von/off to 10%Vo,set All 2.5 ms Output Voltage Rise Time 10% Vo_set to 90% Vo_set Vin=24V Vin=48V 3 3 ms Page 3 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter FEATURE CHARACTERISTICS Parameters Conditions Model Min. Typical Max. Units Efficiency 100% Load Vin =24 Vdc, Io = Io_max, Tc=25℃ AT22S3.3-7.5 87 AT22S5-6 90 AT22S12-2.5 91 AT22S15-2 92 AT22D12-1.25 91 AT22D15-1 92 Vin =48 Vdc, Io = Io_max, Tc=25℃ AT45S3.3-7.5 88 AT45S5-6 90 AT45S12-2.5 90 AT45S15-2 91 AT45D12-1.25 90 AT45D15-1 91 ISOLATION CHARACTERISTICS Input to Output 1 minutes All 1500 Volts Isolation Resistance All 1000 MΩ Isolation Capacitance All 1000 pF Switching Frequency Vin=24V 430 KHz Vin=48 430 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 ff) 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=±12V ±15 Vo=±15V ±18 MTBF Io =100%of Io_max;Ta=25℃ per MIL-HDBK-217F Single Dual 900
650 K hours
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 +65℃. 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) The remote ON/OFF input feature of the converter allows external circuitry to turn the converter ON or OFF. Active-high remote ON/OFF is available as standard. The converter is turned on if the remote ON/OFF pin is high (>3.5Vdc to 75Vdc 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 “-Vin”. If not using the remote on/off pin, leave the pin open (module 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 c urrent and continuous short circuit protection. The unit operates normally once the fault condition is removed. At the point of current limit inception, the converter will go into hiccup mode protection. Over Voltage Protection The over-voltage protection consists of a Z ener diode to limit the output voltage. Over-Temperature Protection (OTP) The AT series converters are equipped with non-latching over-temperature protection. If the temperature exceeds a threshold of 110°C (typical) the converter will shut down, disabling the output. When the temperature has decreased the converter will automatically restart. The over-temperature condition can be induced by a variety of reasons such as external overload condition or a system fan failure. 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 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 + 65℃. Also, maximum c ase temperature under any operating condition should not exceed +105℃. Page 6 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter Efficiency vs. Load Curves Page 7 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter Page 8 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 9 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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) AT22S3.3-7.5 AT22S5-6 AT22S12-2.5 AT22S15-1.25 AT22D12-1.25 AT22D15-1 AT45D15-1 ±15V 8.06 2.4 3.9 2.7 25 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 10 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 6A for 24Vin models and 3A 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 Connection circuit for conducted EMI testing MODEL C1 C2 C3 AT22S3.3-7.5 4.7uF/50V 1812 1000pF/3KV 1808 NC AT22S5-6 4.7uF/50V 1812 1000pF/3KV 1808 NC AT22S12-2.5 4.7uF/50V 1812 1000pF/3KV 1808 NC AT22S15-2 4.7uF/50V 1812 1000pF/3KV 1808 NC AT22D12-1.25 4.7uF/50V 1812 1000pF/3KV 1808 NC AT22D15-1 4.7uF/50V 1812 1000pF/3KV 1808 NC AT45S3.3-7.5 2.2uF/100V 1812 1000pF/3KV 1808 NC AT45S5-6 2.2uF/100V 1812 1000pF/3KV 1808 NC AT45S12-2.5 2.2uF/100V 1812 1000pF/3KV 1808 NC AT45S15-2 2.2uF/100V 1812 1000pF/3KV 1808 NC AT45D12-1.25 2.2uF/100V 1812 1000pF/3KV 1808 NC AT45D15-1 2.2uF/100V 1812 1000pF/3KV 1808 NC Page 11 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter Page 12 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter Page 13 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter EMC Considerations EMI Test standard: EN55022 Class B Conducted Emission Test Condition: Input Voltage: Nominal, Output Load: Full Load MODEL C1 C2 C3 C5 C6 C7 L1 L2 AT22S3.3-7.5 4.7uF/50V 1812 4.7uF/50V 1812 4.7uF/50V 1812 1000pF/2000V 1206 1000pF/2000V 1206 1000pF/2000V 1206 400µH Common Choke 150µH Common Choke AT22S5-6 4.7uF/50V 1812 4.7uF/50V 1812 4.7uF/50V 1812 1000pF/2000 V 1206 1000pF/2000V 1206 1000pF/2000V 1206 400µH Common Choke 150µH Common Choke AT22S12-2.5 4.7uF/50V 1812 4.7uF/50V 1812 4.7uF/50V 1812 1000pF/2000 V 1206 1000pF/2000V 1206 1000pF/2000V 1206 400µH Common Choke 150µH Common Choke AT22S15-2 4.7uF/50V 1812 4.7uF/50V 1812 4.7uF/50V 1812 1000pF/2000 V 1206 1000pF/2000V 1206 1000pF/2000V 1206 400µH Common Choke 150µH Common Choke AT22D12-1.25 4.7uF/50V 1812 4.7uF/50V 1812 4.7uF/50V 1812 1000pF/2000 V 1206 1000pF/2000V 1206 1000pF/2000V 1206 400µH Common Choke 150µH Common Choke AT22D15-1 4.7uF/50V 1812 4.7uF/50V 1812 4.7uF/50V 1812 1000pF/2000 V 1206 1000pF/2000V 1206 1000pF/2000V 1206 400µH Common Choke 400µH Common Choke Page 14 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 Watt DC-DC Converter Page 15 of 16
January 17, 2018 A.01 AT SERIES (2” x 1” Package) Up to 30 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 3 + V Output + V Output
4 Trim - V Output
6 Remote On/Off Remote On/Off
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
±12 Volts ±15 Volts 3.3 Volts – 7.5A
5 Volts - 6A
12 Volts – 2.5A
15 Volts – 2A
±12 Volts - ±1.25A ±15 Volts - ±1A Page 16 of 16