Power device control circuit and power device circuit

摘要

A power device control circuit enters a gate driving signal into a gate terminal of a power device. The power device control circuit includes: a control signal input circuit that receives a power device control signal for control of the power device; a driving system control circuit connected to the control signal input circuit; a driving circuit with a plurality of driving systems, the driving circuit driving the power device in response to a driving circuit control signal received from the driving system control circuit; and a timer circuit that makes switching between the driving systems in response to the driving circuit control signal after elapse of a given period of time from receipt of a predetermined signal, specifically the power device control signal, thereby changing the driving power of the driving system control circuit to drive the power device.

主权项

1. A power device control circuit configured to provide a gate driving signal to a gate terminal of a power device, the power device control circuit comprising:
a control signal input circuit configured to receive a power device control signal for control of said power device; a driving system control circuit connected to said control signal input circuit; a driving circuit with a plurality of driving systems, the driving circuit configured to drive said power device in response to a driving circuit control signal received from said driving system control circuit; and a plurality of timer circuits with each timer circuit configured to provide a respective output at a time different from any other timer circuit so as to cause the driving system control circuit to switch between said driving systems in response to said driving circuit control signal after elapse of a given period of time from receipt of a predetermined signal, thereby changing the driving power of said driving system control circuit to drive said power device, wherein said predetermined signal is the power device control signal or the driving circuit control signal, said power device control circuit switches between the driving systems in a stepwise manner using said plurality of timer circuits to change said driving power smoothly, and one of said timer circuits is used to switch between said driving systems at a start of a mirror period of the power device.