| 摘要 |
A charge pump circuit for a high side drive circuit and a driver driving voltage circuit that stably output a voltage when input voltage is low. The charge pump circuit includes first and second transistors, first and second capacitors, and first to third diodes. The first capacitor has a high voltage side, connected to a load driving power supply voltage via the first diode, and a low voltage side, connected to the load driving power supply voltage via the first transistor or grounded via the second transistor driven in synchronization with the first transistor. The high voltage side is supplied, via the third diode, with a low side drive voltage that is as an output voltage of a low side charge pump, and functions to output high side drive voltage to a high side pre-driver circuit via the second diode.
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