| 摘要 |
A power source apparatus used in electronic equipment includes a power source for supplying a power source voltage, a voltage transformer for transforming the power source voltage supplied from the power source into a voltage different from the power source voltage, a load driven by the voltage supplied from the power source, a transistor for switching between the voltage output from the voltage transformer and the voltage directly output from the power source and supplying one of the voltages output from the voltage transformer and the power source to the load, and a controller for switching the transistor to select the voltage output from the voltage transformer when a level of the power source voltage exceeds a predetermined value, and for switching the transistor to select the voltage directly output from the power source when the level of the power source voltage is below the predetermined value.
|
