3KW Push-Pull DCDC converter

Release time:

2023-05-24 11:30

pic

PROJECT INTRODUCTION
This reference design is a 3KW push-pull converter and Buck DC/DCconverter with input range 20-30Vdc, output 450V-700V.Interleavedparallel push-pull topology reduce current ripple on input capacitor;SiC diode alleviate reverse recovery loss; Buck converter converts thepush-pull output to 450-700V adjustable; Peak current control modewith cycle-by-cycle current limiting function improves the reliability ofthe system.
 
DESIGN SPECIFICATION
Input Voltage 20Vdc~30Vdc
Output Voltage 450~700Vdc
Rated Power 3000W
Switching Frequency 65KHz
System Efficiency Peak 92.5%

 

FEATURES

· Push-pull + Buck designd with wide input/output range;

· Interleaved Push-Pull, smaller current ripple;

· Outputs can be connected in parallel;

· Full protection, including input UVP, output OvP/OCP & power limitingprotection

 

MAIN TOPOLOGY

pic

 

MAIN DEVICES
 
Function Part Number Brand
MOSFET IXFH320N10T2 IXYS
Output Rectifier Diode C4D08120A Wolfspeed
MOSFET Driver IXDN609SIA IXYS
Output Filter Capacitor EKP397M2WP45SZSHP Samxon

 

 MEASUREMENT RESULTS AND WAVEFORMS

 

picEfficiency curve @ 400v output

picEfficiency curve @ 700V output

 

 

picVoltage ripple @ Vout 400V no load

picVoltage ripple @ Vout 400V full load

 

 

picVgs&Vds @ 25% load & input 90° interleaved

picVgs&Vds @ full load & input 90° interleaved

 

 

picDynamic: 0%-50% load

picDynamic: 0%-100% load

 

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3KW Push-Pull DCDC converter

2023-05-24