3KW high efficiency on board DCDC

Release time:

2023-05-16 18:19

 

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PROJECT INTRODUCTION
This reference design solution is a 3kW on board DC/DC, with inputvoltage range 350-700Vdc, rated output 27.5V/10A (peak 130A). Maintopology selected phase shift full bridge and synchronousrectification, making the solution design simple and reliable.
 
DESIGN SPECIFICATION
Input Voltage 350vdc-700Vdc
Output Voltage 27.5Vdc
Rated Power 3000OW
System Efficiency Peak 96%: 93%@full load
Switching Frequency 100KHZ

 

FEATURES

· PSFB + Sync Rectifier base on SiC, simple & reliable system;

· High efficiency, peak up to 96%;

· Suitable for wide range output applications;

· Small volume (145mm235mm*45mm): power density 30W/incha3;

· Full protection, including input OVP, UVP & OCP, BUS OVP, output OVP.UVP & OCP, Short circuit protection, etc:

 

MAIN TOPOLOGY

poc

 

MAIN DEVICES
 
Function Part Number Brand
Primary SIC MOSFET C3M0120100K Wolfs peed
Claim Diode C4D05720A Wolfs peed
Secondary MOSFET IXFH90N20X3 Wolfs peed
Primary MOSFET Driver IXDN604SIA Littelfuse
SecondaryMOSFET Driver IXDN609SIA Littelfuse

 

 MEASUREMENT RESULTS AND WAVEFORMS

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Efficiency Curve

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Load regulation

 

 

pic350Vin 超前臂 ZVS

pic700Vin 超前臂ZVS

 

 

pic350Vin lead leg Zvs

pic700Vin lead leg ZVS

 

 

pic350Vin lag led Zvs

pic700Vin lag leg ZvS

 

 

pic350Vin Sync. MOSFET's Vgs&Vds

pic700Vin Sync. MOSFET's Vgs&Vds

 

 

picOutput voltage ripple @700Vin no load

picOutput voltage ripple @700Vin full load

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3KW high efficiency on board DCDC

2023-05-24