| 摘要 |
PROBLEM TO BE SOLVED: To obtain an overcurrent detection circuit which can set a detection value of an overcurrent according to a use environment of a power supply device. SOLUTION: This invention relates to the overcurrent detection circuit which detects the overcurrent of an output current of the power supply device. The overcurrent detection circuit includes: a current detection means which detects the output current by converting it to a voltage value; an installation posture setting means which changes and sets a conversion rate at which the current detection means converts the output current to the voltage value according to the installation posture of the power supply device; a reference voltage generation means which generates a reference voltage; a circumferential temperature setting means which changes and sets the voltage value of the reference voltage generation means according to the circumferential temperature at which the power supply device is used; and a voltage comparison means which compares the voltage value obtained by converting the output current by using the conversion rate of the current detection means which is set by the installation posture setting means, and the voltage value of the reference voltage setting means set by the circumferential temperature setting means, and outputs an overcurrent detection signal when both the voltage values become equal to each other. COPYRIGHT: (C)2008,JPO&INPIT
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