Invention Grant
- Patent Title: Bridge output circuit, power device and semiconductor device
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Application No.: US16778317Application Date: 2020-01-31
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Publication No.: US10958269B2Publication Date: 2021-03-23
- Inventor: Haruo Yamakoshi
- Applicant: Rohm Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: Rohm Co., Ltd.
- Current Assignee: Rohm Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Fish & Richardson P.C.
- Priority: JPJP2019-018917 20190205
- Main IPC: H03K17/687
- IPC: H03K17/687 ; H02M3/158 ; H02M1/088

Abstract:
A bridge output circuit of the present invention reduces the dead time.
Upon receiving an input signal (SIN) for indicating on state of a high-side transistor (1H), a gate control signal generation circuit (4) outputs a low-side gate control signal (LGCTL) for turning off a low-side transistor (1L) to a low-side driver circuit (2L). On the other hand, a high-side gate control signal (HGCTL) for turning on the high-side transistor is generated from a signal delayed the low-side gate control signal and outputted to a high-side driver circuit (2H). The time of delay is controlled by the input signal (SIN), a signal (LGFB) indicating on/off state of the low-side transistor, and a signal (SOUT_L) indicating a level of an output signal.
Upon receiving an input signal (SIN) for indicating on state of a high-side transistor (1H), a gate control signal generation circuit (4) outputs a low-side gate control signal (LGCTL) for turning off a low-side transistor (1L) to a low-side driver circuit (2L). On the other hand, a high-side gate control signal (HGCTL) for turning on the high-side transistor is generated from a signal delayed the low-side gate control signal and outputted to a high-side driver circuit (2H). The time of delay is controlled by the input signal (SIN), a signal (LGFB) indicating on/off state of the low-side transistor, and a signal (SOUT_L) indicating a level of an output signal.
Public/Granted literature
- US20200252062A1 Bridge Output Circuit, Power Device and Semiconductor Device Public/Granted day:2020-08-06
Information query
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