Patent ID: 8610375

Claim:
An adaptive bleeder circuit, applicable to a power converter, wherein the power converter has a transformer primary side and a transformer secondary side, the power converter enables an input voltage to be selectively connected or not connected to the transformer primary side through a pulse-width-modulated signal, the transformer primary side has an alternating current (AC) Triode for Alternating Current (TRAIC), and the AC TRAIC has a holding current and an input current flowing through the AC TRAIC, the adaptive bleeder circuit comprising: a bleeder circuit, used for adjusting a switch on/off ratio (duty ratio) of the pulse-width-modulated signal according to the holding current and the input current, wherein when the input current is less than the holding current, the bleeder circuit increases the on-state time of the pulse-width-modulated signal, such that the input current recovers to the holding current.