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VPTHVM-270 Bus Converter

With up to 200W of output power, this regulated bus converter module operates from a 270V bus to step down the power to create a 28V bus for your power system. A wide input voltage range accommodates MIL-STD-704 input power requirements for avionics, mobile, ground and other applications. The high efficiency design reduces input power requirements and eases thermal management.



  • Up to 200W output power
  • Single output
  • Use in conjunction with any VPT DV or VPT Series 28V DC-DC converters
  • Very high efficiency up to 91%
  • Wide input voltage range: 160 to 500 Volts per MIL-STD-704
  • High input transient voltage – 500V for 1 second
  • Low input transient voltage – 160V for 1 second
  • Operation over a wide -55°C to +100°C STANDARD
  • High isolation: 3000V
  • Six-sided metal cases for improved EMI performance and mechanical/environmental performance
  • Parallel up to 5 units with current sharing
  • Undervoltage lockout, fixed frequency, output soft start,current limit protection
  • No optoisolators for ultimate reliability

Compliances and Certifications:

  • MIL-STD-704 input voltage requirements
  • Environmental screening to JESD22, MIL-STD-810, MIL-STD-883
  • J-STD-001, ISO-9001, IPC-A-610 Class 3 manufacturing

Summary Data

For complete specifications, please see the official datasheet.

To provide you with the most accurate data for the actual performance of this product once deployed, please note that the electrical performance data provided below is at Tcase = -55° C to +100° C, Vin= +270V ±5%, full load, unless otherwise specified.

Select a product to view its specifications:

Parameter Conditions VPTHVM-270 Units
Input VoltageContinuous
Transient (1 second)
Output VoltageVin = 270
Vin = 160V to 500V
Output Power (1) 0 200W
EfficiencyVin: 270V8891 %
Input RippleVin = 270, Full Load, 20Hz to 10MHz 50250mApp
Output RippleVin = 270, Full Load, 20Hz to 10MHz 100250mVpp
Isolation2250 VDC 100  

(1) Derate linearly to 0 at 110 deg. C
VPT, Inc.