| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power supply circuit optimizing an overcurrent detection threshold in accordance with a load by switching the overcurrent detection threshold from a load-side in accordance with a structure of the load such as a type of the load or the number of loads without changing a DC power supply circuit in an overcurrent protection function of the DC power supply circuit. <P>SOLUTION: A switch element 37, a resistor R3c and a resistor R3b are arranged inside the DC power supply circuit 3. Wiring of a point B is taken to outside the DC power supply circuit 3, and it is connected to A of a load 4. Thus, voltage Vc obtained by feeding back a difference between both end potentials of the current detection resistor R1 can be varied from A of the load 4. Consequently, the overcurrent detection threshold of the DC power supply circuit 3 can be varied from the load-side. <P>COPYRIGHT: (C)2009,JPO&INPIT |
