STEVAL-ISA172V2

STEVAL-ISA172V2 is a 2kW fully digital AC-DC power supply (D-SMPS) evaluation board. The converter consisting of 2 power sections: a two phase interleaved PFC and a DC-DC phaseshifted full-bridge converter, controlled by a STM32F334 MCU for each section. The interleaved PFC comprises two boost converters operating with 180° out of phase, based on 600V MDmesh M2 Power MOSFETs. The downstream section comprises of a DC-DC phase-shifted full-bridge converter based on MDmesh DM2 power MOSFETs and performing voltage step down using HF transformer, with a primary to secondary ratio chosen to maintain high enough efficiency and regulation over the entire operating range. On the primary side transformer is supplied by the full-bridge converter and switching losses are reduced thanks to ZVS operation. On the secondary side synchronous rectification (SR) is used to ensure low conduction losses. The O/P voltage waveform is rectified by STripFET Power MOSFETs and then smoothed by the O/P filter.

• Input AC voltage range from 90V to 264V
• 48V or 52V output voltage, 42A max output current and 2kW nominal output power
• 45Hz to 65Hz input AC frequency, 60kHz PFC switching frequency, 100kHz DC-DC switching frequency
• 0.99 maximum power factor, interleaved PFC stage
• DC-DC full-bridge phase-shifted ZVS w/ synchronous rectification, 4kV HF transformer isolation volt
• Forced cooling with air flow speed modulation according to the output power
• Over-temperature protection and output short-circuit protection
• PFC control & DC-DC control: managed by STM32F334C8
• PFC power stage based on MDmesh M2 power MOSFETs and SiC diodes
• DC-DC power stage based on Mdmesh DM2 power MOSFETs