Semiconductor device including a bootstrap diode, high side power drive circuit, low side power drive circuit, and control circuit for controlling a high side power device and low side power device

A semiconductor device for controlling the drive of a high side power device and of a low side power device which are connected in a totem-pole configuration, said semiconductor device comprising:

• a high side drive circuit for controlling said high side power device and including a circuit load;
• a low side drive circuit for controlling said low side power device;
• a VCC terminal connected to said low side drive circuit and for supplying a VCC potential to said low side drive circuit, said VCC potential serving as a power supply potential to said low side drive circuit;
• a bootstrap diode connected at its anode to said VCC terminal and at its cathode to said high side drive circuit and used to produce a VB potential serving as a power supply potential to said high side drive circuit;
• and
• a control circuit for turning off said circuit load before said VB potential becomes lower than said VCC potential.