| 摘要 |
<p>A power factor correction circuit (3) has a first rectifier diode (D4) for controlling the serial charging of two capacitors (C1, C2), two rectifier diodes (D5, D6) for controlling the parallel discharging of the two capacitors, and a resistor (R) connected in series with the first diode (D4) in order to enhance the power factor and reduce the power-on current. An electronic current-controlled switch (T1) is used, and the parallel discharge diodes (D6, D5) are Zener diodes for protecting the load circuit against over-voltages just above the peak line voltage value.</p> |
