Power control device
AssigneeRohm Co., Ltd.
InventorKenichi Okajima
Life of this patent
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Abstract
A power control device includes: an output voltage controller to control the output voltage of a power supply circuit based on a feedback voltage obtained by dividing the output voltage with voltage dividing resistors; and an overvoltage protection circuit to protect against an overvoltage in the output voltage. The overvoltage protection circuit includes: an output voltage detector to detect whether the output voltage has risen above an output voltage threshold value; and a feedback voltage detector to detect whether the feedback voltage has fallen to or below a feedback voltage threshold value. The overvoltage protection circuit continues or stops operation of the output voltage controller based on a first detection output from the output voltage detector and a second detection output from the feedback voltage detector.
Claims12
A power control device comprising:
- an output voltage controller configured to control an output voltage of a power supply circuit based on a feedback voltage obtained by dividing the output voltage with voltage dividing resistors;
- and
- an overvoltage protection circuit configured to protect against an overvoltage in the output voltage,
- wherein
- the overvoltage protection circuit includes:
- an output voltage detector configured to detect whether the output voltage has exceeded an output voltage threshold value;
- and
- a feedback voltage detector configured to detect whether the feedback voltage has fallen to or below a feedback voltage threshold value, and
- the overvoltage protection circuit continues or stops operation of the output voltage controller based on a first detection output from the output voltage detector and a second detection output from the feedback voltage detector.
Dependencies are inferred from the claim text.