Patent ID: 6486714
Filing Date: 2002-11-26
Classification: H02M,H05B

Abstract:
A half-bridge inverter circuit comprising:a switching circuit of a half-bridge type comprising a first main switching element on a high side and a second main switching element on a low side; and a drive circuit outputting a high side output signal and a low side output signal for driving the switching circuit with a dead time period, the driver circuit comprising a first dead time control circuit on the high side and a second dead time control circuit on the low side, the first and second dead time control circuits cooperating to produce the dead time period, the driver circuit further comprising a start-up circuit comprising a latch circuit that is reset upon detection of a rise in power supply on the low side at start-up of the inverter circuit and is set by the low side output signal from the second dead time control circuit, and a gate circuit allowing the high side output signal from the first dead time control circuit to pass after receiving the low side output signal in response to an output from the latch circuit.