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Made in the USA

Product Series: 3735

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3735

26 – 40 Watt Hybrid DC-DC Converter

Features

Completely self contained Thick Film Hybrid DC-DC Converter
For MIL-STD 704/1275 applications
No External Filter Caps required
Fully Isolated design
Inhibit-not function
Power on soft start
Short Circuit protection
Fully hermetic package
Fully Isolated design with magnetically coupled feedback
No Optocouplers

Specifications

Input: 28 VDC
Input Range (Continuous): 15 VDC to 50 VDC
Input Range (Continuous): 18 VDC to 50 VDC
Transient Survival Voltage: 80 VDC
Isolation Input to Output: 500 VDC
Isolation Input to Output: 500 VDC
Isolation Output to Case: 100 VDC
Storage Temp: -55 °C to +150 °C
Shock: 50 G's
Acceleration: 500 G's
Vibration: 30 G's
Weight: 65 gms typical

Environment

Grade I:
Full Output Power at Tcase = 85°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 115
TID up to kRad(Si)
No SEE up to 60MeV*cm2/mg
Grade M:
Full Output Power at Tcase = 85°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 115
TID up to kRad(Si)
No SEE up to 60MeV*cm2/mg
Grade E:
Full Output Power at Tcase = 125°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 135
TID up to kRad(Si)
No SEE up to 60MeV*cm2/mg

Additional Notes

High Power Density

High Efficiency

Single inputs have Remote Sense pins

Input Ripple Filter

Output Common Mode Filter

Single Output Devices

Toggle Columns: Parameter - Conditions
Parameters Conditions 3735-S03.3 (40W) 3735-S05 (40W) 3735-S12 (40W) 3735-S15 (40W) 3735-S28 (40W)
3735-S03.3 (40W) MIN 3735-S03.3 (40W) TYP 3735-S03.3 (40W) MAX 3735-S05 (40W) MIN 3735-S05 (40W) TYP 3735-S05 (40W) MAX 3735-S12 (40W) MIN 3735-S12 (40W) TYP 3735-S12 (40W) MAX 3735-S15 (40W) MIN 3735-S15 (40W) TYP 3735-S15 (40W) MAX 3735-S28 (40W) MIN 3735-S28 (40W) TYP 3735-S28 (40W) MAX
Output Voltage (FLD) — +3.2 +3.3 +3.4 +4.9 +5.0 +5.1 +11.85 +12.0 +12.15 +14.85 +15.0 +15.15 +27.3 +28.0 +28.3
Output current Vin min — Vin max .8A - 8A .8A - 8A .333A - 3.33A .267A - 2.67A .143A - 1.43A
Efficiency Pout = max rated load 73% 76% - 75% 77% - 81% 83% - 83% 85% - 82% 84% -
Line regulation Pout = max rated load
Vin min — Vin max		 - 10mV 20mV - 10mV 20mV - 10mV 20mV - 10mV 20mV - 20mV 40mV
Load regulation Pout = 10% to F.L. - 20mV 50mV - 20mV 50mV - 20mV 50mV - 20mV 50mV - 50mV 100mV
Output ripple F.L. BW 2 MHz
mVpp		 - 50 100 - 50 100 - 100 200 - 100 200 - 150 300

Dual Output Devices

Toggle Columns: Parameter - Conditions
Parameters Conditions 3735-D05 (40W) 3735-D12 (40W) 3735-D15 (40W)
3735-D05 (40W) MIN 3735-D05 (40W) TYP 3735-D05 (40W) MAX 3735-D12 (40W) MIN 3735-D12 (40W) TYP 3735-D12 (40W) MAX 3735-D15 (40W) MIN 3735-D15 (40W) TYP 3735-D15 (40W) MAX
Output Voltage (FLD) — +4.9
-4.9		 +5.0
-5.0		 +5.1
-5.1		 +11.85
-11.85		 +12.0
-12.0		 +12.15
-12.15		 +14.85
-14.85		 +15.0
-15.0		 +15.15
-15.15
Output current Vin min — Vin max ±.4A - ±4A ±.167A - ±1.67A ±0.133mA - ±1.33A
Efficiency Pout = max rated load 78% 80% - 81% 83% - 82% 84% -
Line regulation Pout = max rated load
Vin min — Vin max		 - ±10mV ±20mV - ±10mV ±20mV - ±10mV ±20mV
Load regulation Pout = 10% to F.L. - ±20mV ±50mV - ±20mV ±50mV - ±20mV ±50mV
Output ripple F.L. BW 2 MHz
mVpp		 - 50 100 - 100 200 - 100 200

Pinout Table

3735-SXX 3735-DXX
Pin-1: + input Pin-1: + input
Pin-2: inhibit-not Pin-2: inhibit-not
Pin-3: output adjust Pin-3: + output
Pin-4: output return Pin-4: output return
Pin-5: + output Pin-5: - output
Pin-6: N/C Pin-6: N/C
Pin-7: N/C Pin-7: N/C
Pin-8: case Pin-8: case
Pin-9: N/C Pin-9: N/C
Pin-10: + input return Pin-10: + input return