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Made in the USA

Model: 3108-S28

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3108-S28

7.5-20 Watt Hybrid DC-DC Converter

Features

RadHard TID >100kRad(Si)
2:1 Margin: Operates beyond 200kRad TID
No SEE: LET > 82meV*cm^2/mg
Proton Resistant: No optocouplers used
Specifically designed for redundant space applications
Completely self contained Thick Film Hybrid DC-DC Converter
No External Filter Caps required
Fully Isolated design
Inhibit-not function
Power on soft start
200kHz operation for low ripple and fast response time
Built in EMI input filter meets MIL-STD 461C requirements CE01,CE03, CS01, CS02 & CS06
Short Circuit protection
Over voltage protection
BIT
External Sync

Specifications

Input: 120 VDC
Input Range (Continuous): 86 VDC to 158 VDC
Isolation Input to Case: 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: 60 gms typical

Environment

Grade EU:
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 L:
Full Output Power at Tcase = 85°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 115
TID up to 45kRad(Si)
No SEE up to 60MeV*cm2/mg
Grade LE:
Full Output Power at Tcase = 125°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 135
TID up to 45kRad(Si)
No SEE up to 60MeV*cm2/mg
Grade S:
Full Output Power at Tcase = 85°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 115
TID up to 100kRad(Si)
No SEE up to 60MeV*cm2/mg
Grade SE:
Full Output Power at Tcase = 125°C
Minimum Output Power at Tcase = -55°C
Linearly derates to zero at Tcase = 135
TID up to 100kRad(Si)
No SEE up to 60MeV*cm2/mg

Single Output Devices

Toggle Columns: Parameter - Conditions
Parameters Conditions 3108-S28 (20W) MIN 3108-S28 (20W) TYP 3108-S28 (20W) MAX
Output Voltage (FLD) — +27.8 +28.0 +28.2
Output current Vin min — Vin max - - 714mA
Efficiency Pout = max rated load 78% 82% -
Line regulation Pout = max rated load
Vin min — Vin max		 - 50mV 250mV
Load regulation Pout = 10% to F.L. - 50mV 250mV
Output ripple F.L. BW 2 MHz
mVpp		 - 150 350

Pinout Table

3108-SXX≥24
Pin-1: bit
Pin-2: inhibit not
Pin-3: soft start
Pin-4: sync
Pin-5: N/C
Pin-6: input ret
Pin-7: + input
Pin-8: N/C
Pin-9: N/C
Pin-10: main output
Pin-11: N/C
Pin-12: main output ret

Case Styles

Part Number Designator Case Style Pin Count Mounting Step File
2 Case Style 2 12 Solder Sealed Flangelss PCB Mount Download
F – 10 Pin Case Style 3 10 Solder Sealed Flanged PCB Mount Download
H Case Style 5 12 Seam Weld Flangeless PCB Mount Download
HF – 10 Pin Case Style 6 10 Seam Weld Flanged PCB Mount Download
VF Case Style 8 12 Seam Weld Flanged Chassis Mount Download