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LED drive circuit

A LED drive and circuit technology, applied in the electronic field, can solve the problems of circuit damage, aging, acceleration, etc.

Pending Publication Date: 2019-10-15
杭州展虹科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the LED driving process, overheating will damage the entire circuit or accelerate aging, so an LED driving circuit with overheating protection is designed for this purpose

Method used

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  • LED drive circuit

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Embodiment Construction

[0008] The content of the present invention will be further described below in conjunction with the accompanying drawings.

[0009] An LED driver circuit such as figure 1 As shown, it includes a first resistor 101, a first PNP transistor 102, a second resistor 103, a third resistor 104, a first comparator 105, a first PMOS transistor 106, a fourth resistor 107, a first NMOS transistor 108, a second PMOS tube 109 and LED lamp 110:

[0010] One end of the first resistor 101 is connected to the power supply voltage VCC, and the other end is connected to the emitter of the first PNP transistor 102 and the positive input of the first comparator 105; the base of the first PNP transistor 102 is grounded , the collector is grounded, the emitter is connected to one end of the first resistor 101 and the positive input end of the first comparator 105; one end of the second resistor 103 is connected to the power supply voltage VCC, and the other end is connected to the third resistor On...

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PUM

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Abstract

The invention discloses an LED drive circuit. The LED drive circuit comprises a first resistor, a first PNP tube, a second resistor, a third resistor, a first comparator, a first PMOS tube, a fourth resistor, a first NMOS tube, a second PMOS tube and an LED lamp. The LED drive circuit provided by the invention can be used for protecting overheating and can avoiding damage.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an LED driving circuit. Background technique [0002] During the LED driving process, overheating will damage or accelerate the aging of the entire circuit, so an LED driving circuit with overheating protection is designed for this purpose. Contents of the invention [0003] The invention aims to solve the deficiencies of the prior art, and provides an LED driving circuit. [0004] An LED driving circuit, comprising a first resistor, a first PNP transistor, a second resistor, a third resistor, a first comparator, a first PMOS transistor, a fourth resistor, a first NMOS transistor, a second PMOS transistor and an LED lamp : [0005] One end of the first resistor is connected to the power supply voltage VCC, and the other end is connected to the emitter of the first PNP transistor and the positive input end of the first comparator; the base of the first PNP transistor is gr...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/50
Inventor 齐盛
Owner 杭州展虹科技有限公司
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