Patent ID: 7663852
Filing Date: 2010-02-16
Classification: H02M

Abstract:
1. A method, comprising: receiving an input signal at a single electrical terminal of a power supply circuit of a power supply, wherein the input signal is representative of an input voltage of the power supply only when current is pulled into the power supply circuit through the single electrical terminal of the power supply circuit, wherein the input signal is a feedback signal only when current is pulled out of the power supply circuit through the single electrical terminal of the power supply circuit; alternatingly disabling and enabling the power supply when the power supply is experiencing a fault condition; continuing the alternating disabling and enabling of the power supply until the fault condition is removed; detecting an input under-voltage condition of the power supply when the power supply is disabled during said alternatingly disabling and enabling the power supply when the power supply is experiencing the fault condition; and regulating an output of the power supply with the power supply circuit in response to the input signal when the input signal is the feedback signal.