| 摘要 |
<p>PURPOSE: Dynamic damper and lighting driving circuit including the dynamic damper are provided to withstand sudden rising voltage by limiting in-rush current. CONSTITUTION: A dynamic damper limits inrush current and includes a timing circuit and a damper circuit. The timing circuit includes a first capacitor, a charge loop and a discharge loop. The damper circuit is connected to the timing circuit. When input voltage is provided to a damper, the first capacitor is charged while the first capacitor is discharged when the input voltage is 0. When the first capacitor is being charged, the damper circuit enters a first operation state and generates a dynamic damper resistor value. When capacitance voltage of the first capacitor is greater than a first threshold voltage, the damper circuit enters a second operation state and the dynamic damper resistor value starts to decrease. When the capacitance voltage is greater than a second threshold voltage, the damper circuit enters a short-circuit state and the dynamic damper resistor value decreases to 0.</p> |
