Patent ID: 6778001
Filing Date: 2004-08-17
Classification: H03H

Abstract:
A semiconductor circuit component capable of being driven when an externally provided switch unit is turned on to supply a first power supply voltage to said semiconductor circuit component,said semiconductor circuit component comprising: a load-control semiconductor switching device with a control terminal; a control signal supply circuit for supplying a control signal to said control terminal of said load-control semiconductor switching device to drive said load-control semiconductor switching device, and wherein the control signal supply circuit is coupled to a third power supply voltage; and a drive control circuit for controlling the control signal supply circuit in a manner so that, only when said switch unit is turned on, a second power supply voltage is supplied from said drive control circuit to said control signal supply circuit to make said control signal supply circuit output the control signal, wherein said second power supply voltage is less than said third power supply voltage and said drive control circuit further comprises a drive control semiconductor switching device with a control terminal and a voltage suppressing circuit disposed between the control terminal of the drive control semiconductor switching device and the second power supply voltage.