Patent ID: 7936133

Claim:
A converter circuit capable of self-reactivation comprising: a detecting circuit for detecting a voltage level of a load and generating a first control signal or a second control signal correspondingly according to the voltage level; a pulse width modulation (PWM) circuit coupled to the detecting circuit for outputting a power control signal when receiving the first control signal, or for stopping operations of the PWM circuit a first predetermined time period after receiving the second control signal; a control circuit coupled to the detecting circuit for outputting a backlight-off signal a second predetermined time period after receiving the second control signal, and outputting a backlight-on signal a third predetermined time period after outputting the backlight-off signal; a switching circuit coupled to the PWM circuit and the control circuit for stopping operations of the PWM circuit after receiving the backlight-off signal, and reactivating the PWM circuit after receiving the backlight-on signal; and a power converting circuit coupled to the PWM circuit for converting input power to provide converted power to the load based on the power control signal.