Patent ID: 8749301

Claim:
A power management device of a touchable control system, comprising: a boost circuit boosting an output voltage according to an input voltage, a controlling signal for ballasting charging, and a controlling signal for boosting charging; a detection circuit detecting a predetermined value of the output voltage; a modulation circuit separately modulating the output voltage by the controlling signal for ballasting charging after the output voltage reaches the predetermined value and by the controlling signal for boosting charging before the output voltage reaches the predetermined value according to the detecting of the detection circuit; a loading circuit receiving the reached predetermined value of the output voltage according to the modulation of the modulation circuit; and a change-over switch electrically disconnecting the boost circuit and the loading circuit before the output voltage reaches the predetermined value; wherein the controlling signal for boosting charging modulating the output voltage is more rapider than the controlling signal for ballasting charging modulating the output voltage.