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Made in the USA

Model: 3834-S28

3834-S28

This DC-DC Converter is recommended for space applications requiring good efficiency at low power as well as a small package size.

Features

Efficiency optimized for lower power applications
GaN switching transistor at fixed 250 kHz for low ripple
No SEE: LET > 82meV*cm^2/mg
Magnetically coupled regulation
Inhibit-not function
Power on soft start
Fully hermetic package
Internal soft start

Specifications

Input: 12 VDC
Input Range (Continuous): 9 VDC to 20 VDC
Input Range (Full Power): 8 VDC to 20 VDC
Isolation Input to Case: 500 VDC
Isolation Input to Output: 500 VDC
Isolation Output to Case: 500 VDC
Storage Temp: -65 °C to 150 °C
Shock:
Acceleration:
Vibration:
Weight: 18 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 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 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 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

Additional Notes

To operate converter, open inhibit-not pin
To inhibit converter, connect inhibit-not pin to input return
If needed use EMI Filter MDI Model 3747 available separately

Single Output Devices

Parameters Conditions 3834-S28 (2W)
MIN TYP MAX
Output set voltage — 27.7V 28V 28.3V
Output current Vin min — Vin max 0.007A - 0.071A
Efficiency Pout = max rated load 75% 78% —
Line regulation Pout = max rated load
Vin min — Vin max		 — 400mV 700mV
Load regulation Pout = 10% to F.L. — 400mV 700mV
Output ripple F.L. BW 2 MHz
mVpp		 — 180mV 300mV

Pinout Table

3834-SXX
Pin-1: +12VDC Input
Pin-2: +12VDC Input Rtn
Pin-3: Output Pos
Pin-4: Output Rtn
Pin-5: Case
Pin-6: N/C
Pin-7: Inhibit-not

Case Styles

Part Number Designator Case Style Pin Count Mounting Step File
MN Case Style 16 7 Seam Weld Flangeless PCB Mount —