Circuit design of 15W multi-output DC-DC converter

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM
Photocoupler

Summary:

Resistor R1 sets the input under/overvoltage point to 33 V and 86 V. It also linearly reduces the device's maximum duty cycle (DCMAX) as the input voltage increases to prevent saturation of the core during transients.

design feature

  • Small number of components
  • Built-in precision OV/UV, set by single resistor
  • Use synchronous rectification, high efficiency (88%)
  • Multiple outputs with good cross adjustment
  • Built-in output overload, open loop and over temperature protection
  • 400 kHz switching frequency
  • No primary current sense resistor

Circuit diagram of 15W multi-output DC-DC converter

See the uploading documentation for details (click to download)

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