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LED chip drive circuit

A technology of LED chips and driving circuits, which is applied in the layout of electric lamp circuits, electric light sources, lighting devices, etc.

Inactive Publication Date: 2006-01-25
赖益嵩
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-power LED lighting drive circuits, there is no perfect functional protection circuit in the prior art except DC to DC conversion

Method used

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  • LED chip drive circuit
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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. Such as figure 1 As shown, the LED chip drive circuit power supply of the present invention and the LED chip are sequentially connected with a DC power supply reverse polarity protection circuit, a lithium battery protection circuit, a driver IC, a parallel overtemperature protection circuit and a dimming control circuit.

[0018] The function of the DC power supply reverse polarity protection circuit is to provide protection when the DC power supply, that is, the battery input polarity is reversed. The lithium battery protection circuit is only used when the lithium-ion Li-ion battery that can be recharged many times is used. When the input power supply voltage is as low as about 2.3V, its output control terminal DOUT outputs a low level to drive the pin 4 of ICU2. (ON / OFF) is pulled low, and pin 4 of the driver IC U2 is the input terminal of ...

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Abstract

A LED chip driving circuit connects driving IC and LED chip in sequence and over-temp protective circuit is connected between driving IC and LED chip. It is suitable for flashlight and other portable lighting device.

Description

technical field [0001] The invention relates to a high-power LED lighting circuit, in particular to a driving and protection circuit for a high-power LED chip. Background technique [0002] Semiconductor lighting technology, Light Emitting Diode (Light Emitting Diode), referred to as LED lighting technology has entered the practical period due to its many advantages such as flexible application, green environmental protection, long life, convenient adjustment and energy saving. For high-power LED lighting driving circuits, there is no complete functional protection circuit in the prior art except DC to DC conversion. Contents of the invention [0003] The object of the present invention is to provide an LED chip driving circuit, and the technical problem to be solved is to provide the LED chip with a high-efficiency DC-to-DC conversion and at the same time provide a perfect protection function for the LED chip. [0004] The present invention adopts the following technical...

Claims

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Application Information

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IPC IPC(8): H05B37/00
Inventor 赖益嵩
Owner 赖益嵩
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