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AssigneeuPI Semiconductor Corp.
InventorsWei-Hsiu HUNG, Yen-Chih LIN, Chen-Xiu LIN
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A controller of a power conversion circuit generates PWM signals to control output stage circuits to provide an output voltage and a load current to an output terminal. The controller includes a sensing circuit, a comparison circuit, a PWM generation circuit and a control loop. The sensing circuit generates a current sensing signal related to load current. The comparison circuit compares the current sensing signal and a default value representing a current threshold to generate a comparison result. The control loop, coupled to the output terminal, the PWM generation circuit and the comparison circuit, generates a trigger signal according to a reference voltage and the output voltage to control the PWM generation circuit to generate PWM signals. When the comparison result indicates that the load current exceeds current threshold, the control loop temporarily stops providing trigger signal to PWM generation circuit to delay the generation of PWM signals.
A method of operating a controller of a power conversion circuit, the controller being coupled to a plurality of output stage circuits and generating a plurality of pulse width modulation (PWM) signals to control the output stage circuits respectively, so that the power conversion circuit providing an output voltage and a load current to an output terminal, the method comprising following steps of:
Dependencies are inferred from the claim text.