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Current-fed dual inductor converter (CF-DIC) project files

Inspired by article Filho, Barbi (1996), A comparison between two current-fed push-pull DC-DC converters-analysis, design and experimentation and made with great assistance of Dragoljub Aleksijević (aka Macola).

Block diagram

Feature list

  • Wide range input: 85 – 265 Vac, 120 – 380 Vdc
  • Wide range output: 2.5 – 52.5 Vdc
  • Max. current 3 A continuously, or 5 A with forced-air cooling (max. power up to ~260 W)
  • Output voltage controlled by tracker circuit or optionally with multiturn trimpot if fixed output voltage is required
  • Cascaded PWM Controller LM5041B (sync buck + push-pull stage)
  • Isolated HV power ground and signal ground for improved noise immunity
  • HV buck section with high performance SiC MOSFET switches
  • High performance Vitroperm 500F core material for power transformer
  • Synchronous rectifier with low R(ds,on) MOSFET switches
  • Over-voltage (OVP), short circuit protection and over-temperature protection (OTP) with latched shutdown and opto-isolated open-collector "Fault" output
  • Over-current protection (OCP)
  • QR flyback as bias power supply (VIPer35)
  • Four bias power supply outputs: +6.5 V, -8 V and "floating" +12 V / -12 V that can be further regulated with LDOs
  • Compact size: 157 x 92 x 45 mm
  • Weight (with enclosure): 0.49 kg

r5B6 prototype



Current-fed dual inductor converter with wide input and output voltage range





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