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

Specifications

Input: 12 VDC to VDC
Input Range (Continuous): 9 VDC to 20 VDC (START)
Input Range (Full Power): 8 VDC to 20 VDC (RUN)
Isolation Input to Case: 500 VDC to VDC
Isolation Input to Output: 500 VDC to VDC
Isolation Output to Case: 500 VDC to VDC
Storage Temp: -65 °C to 150 °C
Shock: to MIL-STD-810 Method 516.5 Procedure III
Acceleration: to MIL-STD 883 Method 2001, test condition A1, Y1 direction, 500G's
Vibration: to MIL-STD-883 Method 2026, test condition 2H
Weight: 18 gms typical to gms typical

Environment

- Grade EU:
  - Full Output Power at T_case = 85°C
  - Minimum Output Power at T_case = -55°C
    - Linearly derates to zero at T_case = 115

- - TID up to kRad(Si)
  - No SEE up to 60MeV*cm²/mg

- Grade L:
  - Full Output Power at T_case = 85°C
  - Minimum Output Power at T_case = -55°C
    - Linearly derates to zero at T_case = 115

- - TID up to 45kRad(Si)
  - No SEE up to 60MeV*cm²/mg

- Grade S:
  - Full Output Power at T_case = 85°C
  - Minimum Output Power at T_case = -55°C
    - Linearly derates to zero at T_case = 115

- - TID up to 100kRad(Si)
  - No SEE up to 60MeV*cm²/mg

- Grade LE:
  - Full Output Power at T_case = 125°C
  - Minimum Output Power at T_case = -55°C
    - Linearly derates to zero at T_case = 135

- - TID up to 45kRad(Si)
  - No SEE up to 60MeV*cm²/mg

- Grade SE:
  - Full Output Power at T_case = 125°C
  - Minimum Output Power at T_case = -55°C
    - Linearly derates to zero at T_case = 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

Toggle Columns: Parameter - Conditions

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

					Array
(
    [model_no] => MN
    [diagram] => https://mdipower.com/mdi/products/wp-content/uploads/2020/09/CS-1607n-MN.png
    [mounting_information] => Seam Weld Flangeless PCB Mount
    [pin_count] => 7
    [step_file] => 
    [style_designator] => 16
    [style_name] => Case Style 16
)

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Model: 3834-S28