3.3KW Interleaved PFC

Release time:

2023-05-24 11:57

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PROJECT INTRODUCTION
The project is 3.3kW interleaved PFC, with input 176Vac~264Vac andoutput 400Vdc/8.5A. The 180interleaved operation significantlyreduces high frequency ripple current on the input DC BUS and theoutput capacitor; Switch frequency is set as 65KHz; Peak efficiency iup to 98.4% and PF exceeds 0.99 at full load and full input voltagerange. lt's a excellent DEMO for air conditioning, OBC and AC/DCconverter
 
DESIGN SPECIFICATION
Input Voltage 176Vac~264Vac
Output Voltage 380Vdc~420Vdc
Rated Power 3300W
System Efficiency 98%ahalfload97.8%afull load
PF 0.99
Switching Frequency 65KHz

 

FEATURES

· Use IXYS Mosfet and Wolfspeed Sic diode, to reduce Trr losses, highlyimprove the system efficiency:

· 180° interleaved parallel PFC, smaller input/output current ripple

· Smaller inductor volume, total volume is only 1/2 of the single Boost PFC

· Inductor volume is reduced by 33% compared to the traditional 20-40KhzIGBT PFC;

· Full protection, including input UVLO, output OvP,OTP and power-limiting:

· Small volume(135mm*200mm*58mm) power density up to 33W/incha3:

 

MAIN TOPOLOGY

pic

 

MAIN DEVICES
 
Function Part Number Brand
Rectifier Bridge SBR2572*2 HY
PFC MOS IXFH60N65X2 Littelfuse
PFC Diode C3D08060A Wolfs peed
Driver IC IXDN609SIA Littelfuse
Output filter capacitor EKP397M2WP45SZSHP Samxon

 

 MEASUREMENT RESULTS AND WAVEFORMS

 

picEfficiency Curve

picPE

 

 

picVgs & Inductor Current

picVgs & Vds

 

 

picOutput voltage @ 176Vac full load start-up

picOutput voltage ripple-20.5V: 5% @ Full load

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3.3KW Interleaved PFC

2023-05-24