Solution

3KW Totem-Pole PFC based on SiC device

Release time:

2023-05-24 13:49

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PROJECT INTRODUCTION
The reference design is 3kW continuous mode totem-pole PFC, withinput 176Vac~264Vac and rated output 400Vdc/7.5A. This solution notonly discards the rectifier bridge and diode in the traditional PFCcircuit, but also adopts the 3rd generation semiconductor devicessuch as SiC/GaN, to reduce or eliminate the loss and straight-throughproblems caused by the reverse recovery of the traditional Mosfetbody diode in the current continuous mode, and the peak efficiencyof the solution reaches 99.1%
 
DESIGN SPECIFICATION
Input Voltage 176Vac-264Vac
Output Voltage 400Vdc
Rated Power 3000W
System Efficiency 65KHz
PF >0.99
Switching Frequency 99.1%网40%load,98.6%afullload

 

FEATURES

· Continuous mode totem-pole PFC with single ARM 4 MCU:

· SiC Mosfet solution, no reverse recovery, which eliminates the defect thatthe traditional totem pole PFC can only be used in DCM/BCM:

· Fixed frequency and optimized EMI filter:

· Higher efficiency, the peak efficiency is 99.1%%:

· Digital control design, better flexibility;

· Small volume: 13024044mm，power density: 25W/inch 3

· MCU integrated comparators achieve various protection functions: input &output UVLO/OVP/OCP, DC BUS OVP and short circuit protection:

 

MAIN TOPOLOGY

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MAIN DEVICES
 
Function Part Number Brand
PFC HF MOS C3M0065100K Wolfspeed
PFC LF MOS IXFH80N65X2 IXYS
Driver IXDN609SIA IXYS
Current Detection MCA1101-50-5 Aceinna

 

 MEASUREMENT RESULTS AND WAVEFORMS

 

picEfficiency curve @230Vac input

picPF @ 230V input

 

 

picUTHD @230Vac input

picVin&lin@ 25%load

 

 

picVin&Iin@ 100% load

pic0-75% load dynamics

 

 

picInput transfer from 176Vac to 264Vac

picFull load start-up

 

 

picZero crossing slow start

pic30 input voltage distortion tests

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3KW Totem-Pole PFC based on SiC device

2023-05-24