发明名称 |
Power supply control circuit |
摘要 |
A power supply control circuit comprises an output transistor 32 which controls supply of electric power to a load and a gate driving circuit which generates control signals “a” and “b” for controlling on/off of the output transistor based on an external input signal. A first discharge path includes a first depletion-type N-channel MOS transistor provided between a gate and a source of the output transistor and discharges a gate charge of the output transistor based on the control signals, when turning off the output transistor. A second discharge path includes a first depletion-type N-channel MOS transistor discharges more slowly than the first discharge path. A diode is coupled to the first depletion-type N-channel MOS transistor in series and detects that a gate voltage of the output transistor has fallen to a prescribed voltage level, and cuts off a first discharge path. |
申请公布号 |
US8242830(B2) |
申请公布日期 |
2012.08.14 |
申请号 |
US20100979102 |
申请日期 |
2010.12.27 |
申请人 |
SOMA OSAMU;NAKAHARA AKIHIRO;RENESAS ELECTRONICS CORPORATION |
发明人 |
SOMA OSAMU;NAKAHARA AKIHIRO |
分类号 |
H03K17/687 |
主分类号 |
H03K17/687 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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