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6.6KW OBC

Release time:

2023-05-24 10:52

PROJECT INTRODUCTION

The reference design is a 6.6kW OBC solution with input voltagerange 176-264Vac, rated output 240-420Vdc/16A. The input topologyis interleaved parallel PFC, DC/DC is full-bridge LLC, and the output isSiC diode bridge rectifier. For the short-circuit protection issue of LLCa more reliable two-level overcurrent protection is used to improvethe system reliability.

DESIGN SPECIFICATION

Input Voltage	176Vac~264Vac
Output Voltage	240~410Vdc
Rated Power	6600W
Switching Frequency	94% @full load
System Efficiency	PFC：60KHz；LLC：80~300KHz

FEATURES

· Interleaved design, minimize EMl filter and output capacitor:

· Dualloop control, output CC & CV mode;

· SiC SBD rectifier, no trr issue and improve system efficiency:

· Full protection,including input UVLO, output OVP/OCP.

· Small volume:145mm*235mm*45mm, power density67W/incha3

MAIN TOPOLOGY

MAIN DEVICES

Function	Part Number	Brand
Input Rectifier	DSP45-12A	IXYS
PFC MOS	IXFH60N65X2	IXYS
PFC Diode	C3D20060D	Wolfspeed
MOSFET Driver	IXDN604SIA	IXYS
LLC MOS	IXFH60N65X2	IXYS
LLc Diode	C3D20060D	IXYS