Patent ID: 8269461

Claim:
A hybrid battery charger, comprising: a power input terminal for receiving an input voltage; a power output terminal for supplying an output voltage and an output current; an output stage connected to the power input terminal and the power output terminal; an error amplifier connected to the output stage, operative to generate a first error signal and a second error signal according to the output voltage and the output current; a linear controller connected to the error amplifier, operative to generate a first control signal according to the first error signal; a PWM controller connected to the error amplifier, operative to generate a second control signal and a third control signal according to the second error signal; and a multiplexer connected to the linear controller, the PWM controller, and the output stage, and according to a mode signal, operative to select the first control signal for the output stage to operate the hybrid battery charger in a linear mode or select the second and third control signals for the output stage to operate the hybrid battery charger in a switching mode.