| 摘要 |
PROBLEM TO BE SOLVED: To avoid the stop of a microcomputer which results from temporary rapid drop of the output voltage of a battery and shorten the time from the start of power feeding from the battery to the start of power feeding to the microcomputer through a constant voltage power supply circuit in an electronic controller for a vehicle.SOLUTION: A power feeding relay circuit 2 includes: a first power feeding path 201, a capacitor 24, and a second power feeding path 202. The first power feeding path 201 includes a first diode 21, a resistance element 22, a second diode 23, which are serially connected from the battery side in this order and forms a power feeding path from the battery 9 to a constant voltage power feeding element 3. The capacitor 24 is electrically connected with a portion of the first power feeding path 201 which is located between the resistance element 22 and the second diode 23 and a reference potential point 8. The second power feeding path 202 includes a third diode 25 and is parallely connected with the first power feeding path 201 to form a power feeding path from the battery 9 to the constant voltage power feeding element 3. |
