Power supply circuit and control method for power supply circuit
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United States of America Patent
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Jan 5, 2021
Grant Date -
N/A
app pub date -
Aug 30, 2019
filing date -
Mar 15, 2019
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Abstract
A power supply circuit according to an embodiment includes an driver, a control circuit, and a protection circuit. The driver includes a first transistor connected between a high-potential-side power supply and a node and a second transistor connected between a low-potential-side power supply and the node. The control circuit generates, according to an output voltage to a load connected to the node via a first low-pass filter circuit, first and second switching pulses for alternately switching the first and second transistors. The protection circuit outputs, when a voltage of the node via a second low-pass filter circuit exceeds a first reference voltage, an interruption signal for making at least the first transistor nonconductive.
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