Lamp and regulation and control circuit thereof

A technology of circuits and lamps, which is applied in the electronic field, can solve problems such as breakdown failure of control transistors, and achieve the effect of avoiding breakdown failure and ensuring reliability

Active Publication Date: 2021-04-02
宁波公牛光电科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The embodiment of this application provides a lamp and its control circuit, which can solve the problem of breakdown failure of the control transistor caused by the short circuit of the light-emitting element in the related art

Method used

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  • Lamp and regulation and control circuit thereof
  • Lamp and regulation and control circuit thereof
  • Lamp and regulation and control circuit thereof

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Embodiment Construction

[0075] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0076] In abnormal scenarios such as a short circuit of the light-emitting element, or a short circuit of the positive and negative terminals of the output side of the lamp, the energy of the electrolytic capacitor in the isolated power supply will be instantly loaded to the control transistor, causing the current flowing through the control transistor to become larger, resulting in The breakdown failure phenomenon occurs in the control transistor. Since the failed regulating transistor cannot adjust the luminous parameters of the luminous element, the luminous parameter a...

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Abstract

The application provides a lamp and a regulation and control circuit (000) thereof, and belongs to the technical field of electronics, and the regulation and control circuit (000) comprises a regulation and control transistor (M1) used for regulating light-emitting parameters of a light-emitting element (001), and a protection circuit (20). Due to the fact that the protection circuit (20) can turnoff the regulation and control transistor (M1) in time when the current flowing through the regulation and control transistor (M1) is larger than the current threshold value, the problem that the regulation and control transistor (M1) breaks down and loses efficacy due to large current is effectively solved.

Description

technical field [0001] The present application relates to the field of electronic technology, in particular to a lamp and a control circuit thereof. Background technique [0002] Dimmable lamps refer to lamps with adjustable luminous parameters such as brightness and color temperature. [0003] In the related art, a dimmable lamp generally includes: an isolated power supply, a driving circuit, a regulating transistor and a light emitting element. Wherein, the isolated power supply is respectively connected with the light-emitting element and the driving circuit, and is used to supply power for the light-emitting element and the driving circuit. The driving circuit, the regulating transistor and the light-emitting element are connected in sequence, and the regulating transistor is used to adjust the light-emitting parameters of the light-emitting element under the control of the driving circuit. [0004] However, when the light-emitting element is short-circuited, the energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B47/20H05B47/25
CPCH05B47/20H05B47/25Y02B20/40
Inventor 刘静马兰
Owner 宁波公牛光电科技有限公司
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