Output circuit with transistor overcurrent protection
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United States of America Patent
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-
Jul 3, 2007
Grant Date -
Dec 16, 2004
app pub date -
Jun 15, 2004
filing date -
Jun 16, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
When the overcurrent detection circuit detects that a voltage drop of the output transistor exceeds a threshold value, it turns on the switch by the first operational amplifier. In the shut-down signal generation circuit, the capacitor is charged with a charge current determined based on a current depending on the voltage drop of the output transistor. The shut-down signal generation circuit generates a shut-down signal to turn off the output switch when a voltage of the capacitor exceeds a voltage of the inverting input terminal of the second operational amplifier.
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