2 kW fully digital AC-DC power supply (D-SMPS) evaluation board

2020-07-20
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The STEVAL-ISA172V2 is a 2 kW fully digital switch mode AC-DC converter consisting of two power sections: a two phase interleaved power factor corrector (PFC) and a DC-DC phaseshifted full-bridge converter, controlled by a STM32F334 microcontroller for each section. The interleaved PFC comprises two boost converters operating with 180° out of phase, based on 600 V 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 the transformer is supplied by the full-bridge converter and switching losses are reduced thanks to zero voltage switching (ZVS) operation. On the secondary side synchronous rectification (SR) is used to ensure low conduction losses. The output voltage waveform is rectified by STripFET Power MOSFETs and then smoothed by the output filter.

STEVAL-ISA172V2是一款2 kW全数字开关模式AC-DC转换器，由两个电源部分组成：一个两相交错式功率因数校正器（PFC）和一个DC-DC相移全桥转换器，由STM32F334微控制器控制每个部分。交错式PFC包括两个基于600 V MDmesh M2功率MOSFET且相位差为180°的升压转换器。下游部分包括一个基于MDmesh DM2功率MOSFET的DC-DC相移全桥转换器，并使用HF变压器执行降压，选择的初级与次级比例可在整个工作范围内保持足够高的效率和调节。在初级侧，变压器由全桥转换器供电，由于零电压开关（ZVS）操作，开关损耗得以降低。在次级侧，同步整流（SR）用于确保低传导损耗。输出电压波形由STripFET功率MOSFET整流，然后由输出滤波器平滑。

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2 kW fully digital AC-DC power supply (D-SMPS) evaluation board

Document Introduction