Patent ID: 8232743

Claim:
A voltage converter for use in a backlight module, comprising: an inductor configured to store an energy of an input voltage; a power switch configured to control a charging path of the inductor according to a switch control signal; a first capacitor configured to provide a first output voltage by storing an energy of the inductor; a second capacitor configured to provide a second output voltage by storing the energy of the inductor; a third capacitor configured to provide a third output voltage by storing the energy of the inductor; a first switch configured to control a signal transmission path between the inductor and the first capacitor according to a first control signal; a second switch configured to control a signal transmission path between the inductor and the second capacitor according to a second control signal; a third switch configured to control a signal transmission path between the inductor and the third capacitor according to a third control signal; a first feedback circuit configured to provide a first feedback voltage corresponding to the first output voltage; a second feedback circuit configured to provide a second feedback voltage corresponding to the second output voltage; a third feedback circuit configured to provide a third feedback voltage corresponding to the third output voltage; and a boost control circuit configured to generate the switch control signal according to the first feedback signal, generate the first control signal according to the first feedback signal and the switch control signal, generate the second control signal according to the first feedback signal, the second feedback signal and the first control signal, and generate the third control signal according to the first feedback signal, the third feedback signal and the second control signal.