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Gate Driving Half-Bridge Circuit

2016-05-17 14:19  
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Gate Driving Half-Bridge Circuit
In the half-bridge circuit, the gate driving circuit can solve the below problems: the upper arm(high voltage end which is short for high end) drive need isolation; high end driving voltage always needs the voltage which is higher than power supply +UDD, namely UDD+SGS; However, it always uses the bootstrap circuit; the power MOSFET of upper and down arm can not be conducted at the same time, and the time should be predetermined. There are only two power MOSFETsin series with power supply, therefore, the diodes VD1 and VD2 are added, thus the withstand voltage of power MOSFET can close to the power supply.