| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor control circuit for a mirror device which can reliably stop a mirror at a predetermined position while it does not respond to the overcurrent in a short time caused by load fluctuation of a motor or the like. SOLUTION: In the motor control circuit, a transistor 68 is turned on, and a transistor 72 is turned off if a load on a motor 20 is temporarily increased while a door mirror is turned, the driving current A4 running in the motor 20 is increased to or above a predetermined value, and the voltage between both terminals of a resistor 59 for detecting the overcurrent is increased, and charges are accumulated in a capacitor 52. In the motor control circuit, before the timer time determined by the time constants of a resistor 50 and the capacitor 52 is elapsed, a transistor 48 maintains its ON state, and a MOSFET 24 maintains the ON state. If the transistor 68 is turned off, a transistor 72 is turned on, the transistor 48 maintains its ON state, the MOSFET 24 maintains its ON state, and the motor 20 is continuously driven to turn the door mirror to a predetermined position. COPYRIGHT: (C)2005,JPO&NCIPI
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