| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply conversion circuit for use in a device having high peak load characteristics.SOLUTION: A power supply conversion circuit 10 is connected between an external power supply 20 and a device 30 having high peak load characteristics, and includes a booster circuit 11, a control circuit 12 and an energy storage element. The booster circuit has an input end connected with the external power supply, and an output end connected electrically with the device having high peak load characteristics. The control circuit is connected in parallel with the booster circuit, and has first voltage specified value and current specified value. When the output current of the external power supply is larger than the current specified value, or the output voltage of the external power supply is smaller than the voltage specified value, the control circuit lowers the output voltage of the booster circuit below the output voltage of the energy storage element.SELECTED DRAWING: Figure 1A |
