Circuit Design of 50W DC-DC Dual Output Converter

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Summary:

The DPA-Switch greatly simplifies the design compared to designs that use separate devices. This design uses coupled output inductors and synchronous rectification for excellent cross regulation and high efficiency.

design feature

  • High efficiency: 90% efficiency at 36 VDC input with synchronous rectification
  • Dual output cross adjustment rate is good: the cross adjustment rate from no load to full load on the two outputs is ±4%
  • Output overload, open loop and over temperature protection
  • 300 kHz switching frequency allows for adequate transformer reset time during synchronous rectification
  • 3.85 × 2.25 × 0.6 inches (~9.62 W/in3)

50W DC-DC converter circuit diagram using DPA425R

See the uploading documentation for details (click to download)

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