互补MOSFET的脉冲变压器隔离驱动电路设计

A Design Of The Driving Circuits Of Complementary MOSFET

随着MOSFET的应用日益广泛,在一些特殊场合常常会使用到互补MOSFET。本文针对互补MOSFET的驱动问题进行了深入讨论,比较了常用的驱动电路,提出了一种针对互补MOSFET设计的新型驱动电路,并通过仿真验证了结果。

Complementary MOSFET is used widely in power switch circuits. There are two types of drive circuits that often used here to drive MOSFET, optocoupler device and the transformer-isolated device. However, the former needs auxiliary power supply and response slowly, so we take pulse transformer instead. There are some problems to be solved in the applications of the latter, such as the release of energy stored in the inductor, the idealization of the waveform, the range of the duty, etc. This optimized design of the transformer-isolated gate drive circuit of MOSFET is completed with the OrCAD software, the simulations and verifications are carried out to confirm whether these problems are solved. Then, the circuit is manufactured with actual devices, the tests show that the resuits of the simulations and verifications meet the actuality much close.