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AssigneeShenzhen Billda Technology Co., Ltd
InventorsJIANJUN KE, WEICHANG WU, PEIZHI CHEN, QIU FENG
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The invention provides a short-circuit protection circuit and a lighting device. A control circuit comprises a thyristor and a switch transistor. A comparison circuit is electrically connected to a power supply, one terminal of a current sampling circuit and one terminal of the thyristor, the other terminal of the current sampling circuit is electrically connected to a first terminal of the switch transistor, a second terminal of the switch transistor is electrically connected to a second terminal of the thyristor, a third terminal of the switch transistor is electrically connected to an external load. By adopting the invention, the thyristor can be kept in an on-state to control on-off of the switch transistor so as to ensure that the switch transistor can be completely turned off, thus effectively improving the validity and reliability of short-circuit protection.
A short-circuit protection circuit, comprising a comparison circuit, a current sampling circuit and a control circuit, wherein the control circuit comprises a thyristor and a switch transistor, the comparison circuit is electrically connected to a power supply, one terminal of the current sampling circuit and a first terminal of the thyristor, the other terminal of the current sampling circuit is electrically connected to a first terminal of the switch transistor, a second terminal of the switch transistor is electrically connected to a second terminal of the thyristor, and a third terminal of the switch transistor is electrically connected to an external load.
Dependencies are inferred from the claim text.