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LED drive chip and drive circuit

A LED drive and chip technology, applied in the field of LED lighting, can solve the problems of low precision of constant current voltage regulation, high power consumption, affecting the reliability and service life of LED lighting, etc.

Inactive Publication Date: 2017-03-22
重庆奥海辉龙大数据有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LED lighting power management and its driving circuit are not ideal, and there are some disadvantages, such as low PFC (Power Factor Correction, power factor), high power consumption, low precision of constant current voltage regulation, etc., which affect the performance of LED lighting. reliability and service life

Method used

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  • LED drive chip and drive circuit
  • LED drive chip and drive circuit

Examples

Experimental program
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Effect test

no. 1 example

[0028] Please refer to figure 1 , The LED driver chip 100 provided by the first embodiment of the present invention includes VCC pin, ZCD pin, RT pin, Ctrl pin, FB pin, Gate pin, GND pin and CS pin, and settings The RS trigger 110, the protection module 130, the function module 150, and the signal processing module 170 inside the LED driver chip 100. The protection module 130, the function module 150 and the signal processing module 170 are all electrically connected to the RS trigger 110, and the protection module 130 It is electrically connected to the functional module 150; the VCC pin, ZCD pin and CS pin are all electrically connected to the protection module 130, and the RT pin, Ctrl pin, FB pin and Gate pin are all electrically connected to the signal processing module 170, The GND pin is grounded.

[0029] Please refer to figure 2 The RS flip-flop 110 includes an R input terminal, an S input terminal, and a Q output terminal, and is used to store the working state of the ...

no. 2 example

[0057] Please refer to Figure 4 The LED driving circuit 200 provided by the second embodiment of the present invention includes a rectifier circuit 210, a filter circuit 230, a control circuit 250, and a charging and discharging circuit 270. The rectifier circuit 210, the filter circuit 230, the control circuit 250, and the charging and discharging circuit 270 are sequentially Electrically connected, the control circuit 250 includes the LED driving chip 100 provided by the first embodiment of the present invention.

[0058] The rectifier circuit 210 is used to convert external AC power into DC power, and includes an AC power source F1, a rectifier bridge 211, a first capacitor C1, and a first diode D1. The AC power source F1 is electrically connected to the input end of the rectifier bridge 211. The first output terminal of 211 is connected in series with the first capacitor C1 to ground and is electrically connected to the control circuit 250. The second output terminal of the ...

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PUM

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Abstract

The invention provides an LED drive chip and a drive circuit, and relates to the technical field of LED illumination. The LED drive chip comprises an RS trigger, a protection module, a function module and a signal processing module, wherein the protection module, the function module and the signal processing module all are electrically connected with the RS trigger; and the LED drive chip supports power factor correction and has complete protection functions which include an under-voltage protection function, an output overvoltage protection function, an output short-circuit protection function, a current-limiting protection function and an over-temperature protection function. The LED drive circuit comprises a rectifier circuit, a filter circuit, a control circuit and a charge and discharge circuit, wherein the rectifier circuit, the filter circuit, the control circuit and the charge and discharge circuit are electrically connected in sequence; the control circuit comprises the LED drive chip. The LED drive chip has outstanding advantages of high PFC, high-precision constant current and stable voltage, low power consumption, low cost and the like, and a peripheral application circuit is simple.

Description

Technical field [0001] The present invention relates to the technical field of LED lighting, in particular to an LED drive chip and a drive circuit. Background technique [0002] At present, LED (Light Emitting Diode, Light Emitting Diode) lighting applications are very wide, such as LED spotlights, downlights, street lights, tunnel lights and other lighting fixtures. Compared with ordinary incandescent lamps, fluorescent lamps, etc., they have small size and power consumption. Low, long service life, rich colors, environmental protection and excellent performance such as good shock resistance. However, LED lighting power management and its driving circuit are not ideal, and there are some shortcomings, such as low PFC (Power Factor Correction, power factor), high power consumption, low constant current voltage regulation accuracy, etc., which affect the LED lighting Reliability and service life. Summary of the invention [0003] The purpose of the present invention is to provid...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37Y02B20/30
Inventor 陈平物盛周军
Owner 重庆奥海辉龙大数据有限公司