LED driver chip and its over-temperature protection point adjustment unit
A technology of LED drive and adjustment unit, which is applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., which can solve the problems of LED drive chip burnout, inconvenience for users, and short continuous working time of LED lighting equipment, so as to achieve continuous work Time-prolonging, easy-to-use effects
Active Publication Date: 2017-12-26
SHENZHEN CYT SEMICON TECH CO LTD
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Problems solved by technology
[0005] Based on one or more of the above problems, the present invention provides an LED driver chip and its over-temperature protection point adjustment unit to solve the problem that the temperature of the LED driver chip in the prior art is too high, causing the LED driver chip to burn out, and The continuous working time of LED lighting equipment is short, causing inconvenience to users
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[0022] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. It should be noted that, if there is no conflict, the embodiments of the present invention and various features in the embodiments can be combined with each other, and all are within the protection scope of the present invention.
[0023] See figure 1 and figure 2 , figure 1 is a schematic structural diagram of the over-temperature protection point adjustment unit in a preferred embodiment of the present invention, figure 2 yes figure 1 The schematic diagram of the circuit structure of the over-temperature protection point adjustment unit is shown. Such as figure 1 and figure 2 As shown, the over-temperature protection point adjustment unit 24 is used to set the over-temperature protection point for temperature compensation startup, including an operational amplifier module 241, a current mirror module 242, a current amplification module 243, a...
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The invention discloses an LED driving chip and an over-temperature protection point adjusting unit thereof. The over-temperature protection point adjusting unit comprises an operational amplifier module, a current mirror module, a variable-resistance unit and a current amplification module, wherein the operational amplifier module is used for providing loading voltage and guarantees that stable voltage is provided when multiple loads exist or a single load is larger; the current mirror module is used for providing mirror current for current output by the operational amplifier module; the current amplification module is used for amplifying the mirror current according to default multiple; the variable-resistance unit is used for setting the over-temperature protection point size. The LED driving chip and the over-temperature protection point adjusting unit thereof have the benefits as follows: the LED driving chip is effectively prevented from being burnt out due to overhigh working temperature, meanwhile, the continuous working time of LED lighting equipment is prolonged as far as possible, and convenience is brought to a user.
Description
technical field [0001] The invention relates to the technical field of driving LED light sources, in particular to an LED driving chip and an over-temperature protection point adjustment unit thereof. Background technique [0002] Due to the advantages of environmental protection, long service life, energy saving, stable performance, high luminous efficiency and small size, LED light sources have been widely used in various lighting fields, such as indoor lighting, automobiles, and consumer electronics. [0003] At present, with the rapid development of LED technology, LED light sources have been widely used in high-power lighting equipment. However, the current high-power lighting requires a large number of LEDs, some as many as hundreds. Recently, a kind of LED photoelectric module has been widely used. The LED photoelectric module includes a substrate and an LED driving circuit and an LED lamp are arranged on the substrate. The LED driving circuit includes an LED driving...
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IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 王泽宇张伟珊焦飞华古道雄
Owner SHENZHEN CYT SEMICON TECH CO LTD