发明名称 |
POWER SUPPLY CONTROLLER |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply controller for controlling power supply through on-off operation of a semiconductor element based on a pulse train-like control signal while performing protective operation for preventing breakdown of a semiconductor switch element and capable of preventing superfluous protection appropriately. <P>SOLUTION: The power supply controller 10 comprises a thermal FET 11 provided with an FET 20 performing on/off operation based on a PWM control signal. The thermal FET 11 is provided with an overheat protection circuit 42 and a signal corresponding to the voltage level at the gate terminal G is inputted to a microcomputer 12 by an input level detection means 50 provided on the outside of the thermal FET 11. The microcomputer 12 performs stop operation of a PWM control signal when the voltage level at the gate terminal G reaches the interruption level of the FET 20 by a predetermined number of times. On the other hand, the microcomputer 12 sustains output without performing stop operation of a PWM control signal when the voltage level of a power supply 30 for vehicle is below a reference level. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
申请公布号 |
JP2006180573(A) |
申请公布日期 |
2006.07.06 |
申请号 |
JP20040368222 |
申请日期 |
2004.12.20 |
申请人 |
AUTO NETWORK GIJUTSU KENKYUSHO:KK;SUMITOMO WIRING SYST LTD;SUMITOMO ELECTRIC IND LTD;TOYOTA MOTOR CORP |
发明人 |
KOSAKA MITSUAKI;KATO MASAYUKI;SHIBATA MASAO |
分类号 |
H02M3/155;H01L21/822;H01L27/04;H02H7/20;H03K17/08 |
主分类号 |
H02M3/155 |
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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