| 摘要 |
<p>PURPOSE:To prevent driving time by a battery from being shortened in an electronic unit such as a personal computer driven by the battery and to prevent deterioration on account of over-discharge in a charging battery. CONSTITUTION:Even if the stop period of the electronic unit main body such as the personal computer lasts for a long time, the power of a power control circuit consuming power in spite of the ON/OFF of main body power is supplied not from the battery but from a solar battery Namely, a voltage supply line from the battery 1 for the power control circuit 7 is cut and the solar battery 20 is connected to the power terminal of the power control circuit in power circuit constitution where power is supplied from the battery 1 to loads 3 and 4 through a DC/DC conversion part 2 and power is supplied to the power control circuit 7.</p> |
