Title:
SWITCH DEVICE AND MOTOR DRIVE DEVICE USING SAID SWITCH DEVICE
Document Type and Number:
WIPO Patent Application WO/2020/031672
Kind Code:
A1
Abstract:
This motor drive device 10 has: an IPD1 for which a VBB pin and an IN pin are connected to the application end of a voltage V1, an OUT pin is connected to a node n1 of a DC motor 20, and that performs on/off control of a transistor M5 that is integrated between the VBB pin and the OUT pin according to the terminal voltage of the IN pin; and an IPD2 for which the VBB pin and the IN pin are connected to the application end of a voltage V2, the OUT pin is connected to a node n2 of the DC motor 20, and that performs on/off control of a transistor M6 that is integrated between the VBB pin and the OUT pin according to the terminal voltage of the IN pin. The voltages V1 and V2 are switched in terms of their high low relationship to each other according to the rotation direction of the DC motor 20. The IPD1 and the IPD2 respectively include a motor locking detection unit that does forced stopping of the output operation when an overcurrent protection operation continues across a mask period.
Inventors:
TAKUMA TORU (JP)
KULANDAIRAJ PRAVEEN JAYAKAR THOMAS (JP)
SOUNDARARAJAN SRINIVASA PRASAD (JP)
KULANDAIRAJ PRAVEEN JAYAKAR THOMAS (JP)
SOUNDARARAJAN SRINIVASA PRASAD (JP)
Application Number:
PCT/JP2019/028618
Publication Date:
February 13, 2020
Filing Date:
July 22, 2019
Export Citation:
Assignee:
ROHM CO LTD (JP)
International Classes:
H02P7/06; H02P7/28
Foreign References:
| JP2001328487A | 2001-11-27 | |||
| JPH07337065A | 1995-12-22 | |||
| JP2002127824A | 2002-05-09 | |||
| JP2007228180A | 2007-09-06 |
Attorney, Agent or Firm:
SANO PATENT OFFICE (JP)
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