| 摘要 |
PURPOSE:To provide the efficient power unit with small capacity to be used for various kinds of electric appliances by using a dropper regulator dependent on the efficiency due to the difference between input and output voltages and a switching regulator independent of the input voltage according to the input voltage while switched to one output part. CONSTITUTION:The efficient power unit is provided with a dropper regulator power supply part 11, a switching regulator power supply part 12, a detection part 13 detecting the input voltage, a comparison part 14 comparing the input voltage with the set output voltage, and a changeover part 15 switching to an efficient power supply system. |
