| 摘要 |
PROBLEM TO BE SOLVED: To provide a power factor control circuit which lightens nonefficient current property and besides is of inexpensive constitution. SOLUTION: A power factor control circuit 10 includes a switch inductor constitution which generates output voltage 40, being coupled with rectified voltage input 20. A control circuit 35 is provided with a feedback path 50 which switches the switch inductor constitution 30, according to the control input, and this compares a part of the output voltage with the detected parameter of input voltage, and adds weighted fixed voltage 65, and supplies error voltage to control input. |
