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AssigneePower Design, Inc.
InventorsYi-Lun SHEN, Yu-Yun HUANG
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A power controller with short-circuit protection is disclosed to control a power switch, which is connected in series with a current-sense resistor and an inductive device between two power lines. The current-sense resistor provides a current-sense signal. The power controller includes a PWM signal generator and a short-circuit protection circuit. The PWM signal generator generates a PWM signal to the power switch to create switching cycles, each consisting of an ON time and an OFF time. The short-circuit protection circuit has a high-pass filter and a condition detector. The high-pass filter high-pass filters the current-sense signal to provide a filtered signal to the condition detector, which determines whether the filtered signal fits a predetermined condition during the ON time to generate a short-circuit protection signal and to prevent the power switch being turned on.
A power controller configured to control a power switch, the power switch, a current sense resistor, and an inductive component connected between two power lines in series, the current sense resistor configured to provide a current sense signal, the power controller comprising:
A control method applied to a power controller to control a power switch, the power switch, a current sense resistor, and an inductive component connected between two power lines in series, the current sense resistor configured to provide a current sense signal, the control method comprising steps of:
A power controller configured to control a power switch, the power switch, a current sense resistor, and an inductive component connected between two power lines in series, the current sense resistor configured to provide a current sense signal, the power controller comprising:
Dependencies are inferred from the claim text.