Invention Grant
US09013849B2 Ground protection circuit and switch driving device using the same
有权
接地保护电路和开关驱动装置使用相同
- Patent Title: Ground protection circuit and switch driving device using the same
- Patent Title (中): 接地保护电路和开关驱动装置使用相同
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Application No.: US13401242Application Date: 2012-02-21
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Publication No.: US09013849B2Publication Date: 2015-04-21
- Inventor: Motohiro Ando
- Applicant: Motohiro Ando
- Applicant Address: JP Kyoto
- Assignee: Rohm Co., Ltd.
- Current Assignee: Rohm Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Fish & Richardson P.C.
- Priority: JP2011-035325 20110222
- Main IPC: H02H3/02
- IPC: H02H3/02 ; H02H7/22 ; H02H3/087 ; H02H7/20
Abstract:
A ground protection circuit (36) includes: a sensing resistor (R3), disposed on a path which a charging current (IB) of a bootstrap circuit (D1, C1) flows through; a comparator (361), for comparing a voltage (ΔV) between two ends of the sensing resistor (R3) and a specific threshold voltage (Vth) to generate a ground protection signal (S1); and a logic gate (362), for enabling the ground protection signal (S1) to be invalid in a normal charging operation of the bootstrap circuit.
Public/Granted literature
- US20120212863A1 GROUND PROTECTION CIRCUIT AND SWITCH DRIVING DEVICE USING THE SAME Public/Granted day:2012-08-23
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