| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power semiconductor device capable of sufficiently charging a bootstrap capacitor, with a circuit being simplified and miniaturized. <P>SOLUTION: One end of a bootstrap capacitor Cbs is connected to a connection point of a low-side switching element M2 and a high-side switching element M1 connected in totem-pole, while the other end is connected to a power supply terminal of a high-side drive circuit 10a. A bootstrap diode Dbs supplies a current from a low-side drive power supply LV to the other end of the bootstrap capacitor Cbs. When the high-side drive circuit 10a turns on the high-side switching element M1 and a low-side drive circuit 10b turns off the low-side switching element M2, a bootstrap compensation circuit 12 supplies a current from a floating power supply FV, whose reference potential is a high voltage side potential, to the other end of the bootstrap capacitor Cbs. <P>COPYRIGHT: (C)2012,JPO&INPIT |
