Leakage protection circuit and lighting system
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsYongyu Zhong, Longqi Wang
Life of this patent
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Abstract
A leakage protection circuit for a lighting system can include: a pull-down current generation circuit configured to generate a pull-down current flowing from a DC bus to a reference voltage; and a control circuit configured to control the pull-down current generation circuit to generate a varied pull-down current during an operating interval, and to determine whether leakage occurs in accordance with a change state of a detection voltage signal representative of a voltage on the DC bus in a detection time interval, where the detection time interval is within the operating interval.
Claims20
A leakage protection circuit for a lighting system, comprising:
- a) a pull-down current generation circuit configured to generate a pull-down current flowing from a DC bus to a reference voltage;
- and
- b) a control circuit configured to control the pull-down current generation circuit to generate a varied pull-down current during an operating interval, and to determine whether leakage occurs in accordance with a change state of a detection voltage signal representative of a voltage on the DC bus in a detection time interval, wherein the detection time interval is within the operating interval.
Dependencies are inferred from the claim text.