| 摘要 |
PROBLEM TO BE SOLVED: To prevent instantaneous rush current from a power source to a load. SOLUTION: This contact damage preventing circuit comprises a diode 2 for preventing the back flow of the current from the load to a power source device 1 connected to each other in series in a power feeder line, a P-chFET11 for preventing the rush current from the power source device 1 to the load, a Zener diode 3 detecting the application of the power source voltage from the power source device 1, a transistor 5, a resistor 7 and a P-chFET8 for controlling the ON/OFF operation of the P-chFET11, a resistor 10 for determining a time for the P-chFET11 to change from OFF condition to ON condition, and a time constant circuit of a capacitor 12. |
