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 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

Case Styles