Current-fed dual inductor converter with wide input and output voltage range
Clone or download
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Type Name Latest commit message Commit time
Failed to load latest commit information.
Eagle files
Gerber files
EEZ CF-DIC r5B6 Sheet1of3.png
EEZ CF-DIC r5B6 Sheet2of3.png
EEZ CF-DIC r5B6 Sheet3of3.png
EEZ CF-DIC r5B6.pdf
Feryster QR Flyback custom transformer.pdf

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 AC input 85 – 265 V
  • Wide DC output: 2.5 – 52.5 V
  • Max. current 5 A continuously (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(gs,on) MOSFET switches
  • Active Duty cycle limiter
  • Over-voltage (OVP), short circuit protection and over-temperature protection (OTP) with latch and opto-isolated open-collector "Fault" output
  • Four bias power supply outputs: +6 V, -8 V and "floating" +12 V / -12 V
  • Over-current protection (OCP)
  • f(sw,buck)= ~68 kHz, f(sw,pp)= ~34 kHz
  • QR flyback as bias power supply (VIPer35)
  • Compact size (155 x 90 mm)

r5B4 prototype

PCB top layer

PCB top layer