Search International and National Patent Collections

1. (WO2018100844) DRIVE DEVICE

Pub. No.:    WO/2018/100844    International Application No.:    PCT/JP2017/033281
Publication Date: Fri Jun 08 01:59:59 CEST 2018 International Filing Date: Fri Sep 15 01:59:59 CEST 2017
IPC: H03K 17/08
H02J 7/00
H02M 1/00
H02M 1/08
H03K 17/00
Inventors: KAWAMOTO, Akira
川本 輝
A drive device (1) controls driving of an opening/closing MOS transistor (Q1) and a protection MOS transistor (Q2) which are interposed in series in a power supply path from a DC power supply (2) to a load (3) and which are connected in such a way that parasitic diodes therein are arranged reversely to each other, and the drive device is provided with a drive unit (5) and a reverse connection protection control unit (6). The drive unit drives the opening/closing MOS transistor and the protection MOS transistor by receiving power supplied from the DC power supply through a high-potential-side power supply line (L1) connected to a high-potential-side terminal of the DC power supply and a low-potential-side power supply line (L2) connected to a low-potential-side terminal of the DC power supply. When the potential relationship between the high-potential-side power supply line and the low-potential-side power supply line becomes opposite to the normal relationship, the reverse connection protection control unit performs a protection operation by forcibly driving the protection MOS transistor to turn off independently of the driving by the drive unit so that an electric current flowing in the power supply path is blocked.