发明授权
- 专利标题: Load drive circuit using flywheel diode
- 专利标题(中): 使用飞轮二极管负载驱动电路
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申请号: US10310967申请日: 2002-12-06
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公开(公告)号: US06829152B2公开(公告)日: 2004-12-07
- 发明人: Shoji Miura , Tomoatsu Makino , Fuminari Suzuki
- 申请人: Shoji Miura , Tomoatsu Makino , Fuminari Suzuki
- 优先权: JP2001-373129 20011206; JP2002-300627 20021015
- 主分类号: H02M114
- IPC分类号: H02M114
摘要:
A load drive circuit, disposed to drive an inductive load, includes a reflux closed circuit connected to the load. A flywheel diode is placed in the reflux closed circuit. A MOS transistor, disposed to turn on/off current to drive the load, is connected in parallel to the flywheel diode. A capacitor is disposed to connect its both ends to a gate and a drain of the MOS transistor, while a resistor is disposed to connect its both ends to the gate and a source of the MOS transistor. During a recovery operation of the flywheel diode, with the help of the capacitor and resistor, a gate-to-source voltage of the MOS transistor is pulled up to a value over a threshold for a predetermined period of time. Pulling up the gate-to-source voltage results in a softened recovery characteristic of the flywheel diode, suppressing recovery surges.
公开/授权文献
- US20030107905A1 Load drive circuit using flywheel diode 公开/授权日:2003-06-12
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