Linear constant-current LED driving circuit, chip and device

A LED driving, linear constant current technology, applied in lighting devices, electric light sources, electrical components, etc., can solve problems such as low efficiency and large circuit loss

Active Publication Date: 2017-08-15
SHENZHEN SUNMOON MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a linear constant current LED drive circuit, aiming to solve the problem of large circuit loss caused by the discharge

Method used

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  • Linear constant-current LED driving circuit, chip and device
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  • Linear constant-current LED driving circuit, chip and device

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Embodiment Construction

[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0023] figure 2 The structure of the linear constant current LED driving circuit provided by the embodiment of the present invention is shown. For ease of description, only the parts related to the present invention are shown, which are detailed as follows:

[0024] As a preferred embodiment of the present invention, the linear constant current LED drive circuit is connected to the LED load 300 and includes a rectifier module 100, a constant current drive module 200, an input voltage detection module 400, a discharge control module 500, and a discharge module 600.

[0025] The rectifier module 1...

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Abstract

The invention provides a linear constant-current LED driving circuit, chip and device suitable for the technical field of LED driving. The circuit comprises a rectification module, a constant current driving module, an input voltage detection module, a discharge control module and a discharge module; the input voltage detection module detects an output voltage of the rectification module to generate a voltage detection value; the discharge control module generates a discharge stop signal or a discharge signal according to the voltage detection value; and the discharge module cuts off a discharge current according to the discharge stop signal, or starts outputting the discharge current according to the discharge current. When the discharge control module determines that there is no access of a silicon controlled rectifier light modulator and the voltage detection value is between a first reference voltage value and a break-down voltage value, the leakage module is controlled to cut off the discharge current, the circuit loss is reduced and the circuit efficiency is improved.

Description

Technical field [0001] The invention belongs to the technical field of LED driving, and particularly relates to a linear constant current LED driving circuit, a driving chip and a driving device. Background technique [0002] As a new type of light source, Light-Emitting Diode (LED) is widely used in various fields due to its high brightness, low energy consumption and long life. The linear constant current drive scheme is used in various fields with its simple system structure. It is widely used in small and medium power LED drive systems. [0003] At present, the commonly used thyristor dimming constant current LED driving circuit such as figure 1 As shown, the circuit includes a thyristor dimmer 10, a rectifier module 20, a bleeder module 30, a constant current drive module 40 and an LED load 50. When figure 1 When the thyristor dimmer 10 is not connected to the circuit shown, before the output voltage of the rectifier module 20 rises to the turn-on voltage of the LED load 50, t...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37
Inventor 李照华林道明王东旭
Owner SHENZHEN SUNMOON MICROELECTRONICS
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