New Industry Products

20W Triple-Output DC-DCs for Avionics and MRO Designs

July 16, 2017 by Paul Shepard

Modular Devices, Inc. (MDI) has expanded its POWRMOD product line, specifically designed for Avionics and commercial Aviation MRO applications, with the PM3704DC-DC 20W triple output dc-dc converters. These units offer a primary output of +5Vdc at 1A, and dual secondary outputs of +/- 12-Vdc or +/- 15-Vdc at 400mA.

The PM3704 features the following: No external components required. Precision machined metal case for heat removal and EMI shielding; Common Mode EMI Filters (Input and Ouput); Low Ripple, independently regulated outputs; Fast Transient Response Time; Simple On-Off control; Short Circuit and output overload protection; Full magnetic isolation (No Optocouplers); Works through input transients of DO-160G; Designed for long life, reliable operation in Avionics environments; Power Supply Watchdog signals

PM3704's come in a 48.27x48.27x10mm machined metal case with corner flanges for ease of mounting and effective thermal management. All POWRMOD products are available with Commercial Screening (-40 to +85 degrees C ) or Rugged screening (-55 to +105 degrees C) levels. PM3704 is designed to suit cost conscious, avionics and MRO applications.

Features and benefits include:

  • Self-contained DC-DC Converter: Fully Functional; Needs No Additional External Capacitors or Components
  • Metal Case: Shields Against Radiated Emissions and Susceptibility
  • Internal Common Mode EMI Filter: Limits Conducted Emissions
  • 200kHz Current Mode Flyback Topology: Fully Regulated Outputs With Low Ripple and Fast Transient Response Times
  • On-Off Control Function: Grounding on-off pin inhibits output
  • Output Voltage Selection: Other Output Voltages/Combinations May Be Specified; Consult Factory
  • Short Circuit Limited: Protected Against Output Overloads and Short Circuits
  • Fully Isolated: Inputs to Outputs and Case 500VDC, Outputs to Case 100VDC
  • Transients Tolerant: Works Through Input Transients of DO-160G
  • Compact, Encapsulated Construction: Small Footprint with Long Life and Reliable Operation in Severe Operational Environments
  • Signals, Functions: Power supply watchdog signals - FAIL/OK, PDW, RESET; ADJUST Function.