| 摘要 |
A self-adaptive lightning-proof anti-surge control circuit (2) for use in a power supply switch (1), comprising an anti-surge unit (20), a switch unit (21), a sampling unit (22), and a control driving unit (23). The anti-surge unit (20) is connected between a filter/rectifier circuit (11) and a power conversion circuit (12). The switch unit (21) is connected in parallel to the anti-surge unit (20), and regulates the input impedance of the power supply switch (1). The sampling unit (22) is connected to the filter/rectifier circuit (11), and samples surge signals of the filter/rectifier circuit (11). The control driving unit (23) is connected to the sampling unit (22), and generates a driving control signal according to the surge signal, so as to control ON or OFF of the switch unit (21). The present self-adaptive lightning-proof anti-surge control circuit (2) detects the voltage change at the output end of the filter/rectifier circuit (11), and regulates the input impedance of the power supply switch (1) according to said voltage change, thus limiting surge current and protecting power components. |
