Integrated high-voltage power IGBT device monolithic LED driving chip

A high-voltage power device and LED driving technology, applied in the field of integrated circuits, can solve the problems of complex peripheral circuits and high overall cost, and achieve the effect of ensuring high performance and reducing complexity

Inactive Publication Date: 2012-06-27
成都成电硅海科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Various driving circuits in the prior art have the defects of high overall cost and complex peripheral circuits

Method used

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  • Integrated high-voltage power IGBT device monolithic LED driving chip

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Embodiment Construction

[0009] The overall application scheme of the present invention consists of an LED driver chip and its peripheral circuits. The LED driver IC consists of a regulator linear regulator 1, a Toff off-time timer 2, a DIM dimming controller 3, a PWM signal generator 4, a DRV power tube driver module 5, a low-voltage power device 6, and a gate of an external high-voltage power device The setting circuit 7, the high-voltage power tube 17, and the protection circuit 8 are composed, and the protection circuit 8 includes a load open-circuit short-circuit protection circuit, an over-current protection circuit and an over-temperature protection circuit. The peripheral circuit is composed of a standard full-bridge rectifier circuit 12 , high-voltage input BUCK step-down circuits 13 , 14 , 15 , 16 , and a sampling resistor 18 .

[0010] The LED driver IC drives the internal low-voltage power device 6 in a fixed off-time control mode, and its fixed off-time is determined by Toff off-time time...

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Abstract

An integrated high-voltage power IGBT device monolithic LED driving chip relates to an integrated circuit technology. A regulator linear adjuster, a Toff turn-off time timer, a DIM light-dimmer controller, PWM signal generator, a DRV power tube driving module, a low voltage power device, a grid setting circuit of an external high voltage power device, a protection circuit and an IGBT high voltage power device are integrated on the chip. The regulator linear adjuster is connected with an output terminal of the IGBT high voltage power device. The Toff turn-off time timer, the DIM light-dimmer controller and the protection circuit are connected with the PWM signal generator. The PWM signal generator is connected with a grid electrode of the low voltage power device through the DRV power tube driving module. The grid electrode of the IGBT high voltage power device is connected with the grid setting circuit. The output terminal is connected with an input terminal of the low voltage power device. According to the invention, an innovation framework is used. The chip can work stably and reliably in a general alternating current input scope of 85VAC to 265 VAC. High performance of the system can be guaranteed.

Description

technical field [0001] The present invention relates to integrated circuit technology. Background technique [0002] High-voltage step-down LED drive control chip refers to a type of LED drive IC that can directly drive LEDs in the range of 85VAC to 265VAC universal AC input, which is stable, reliable and efficient. Because it is often used for driving and controlling lighting LEDs, the current is often relatively large. Various driving circuits in the prior art have the defects of high overall cost and complex peripheral circuits. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an LED driver chip that can adapt to the input voltage range from 18V to 450V. [0004] The technical solution adopted by the present invention to solve the technical problem is to integrate a high-voltage power IGBT device monolithic LED driver chip, which is characterized in that the following parts are integrated in the chip: regulat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCY02B20/42Y02B20/40
Inventor 黄国辉李文昌刘剑黄云川于廷江
Owner 成都成电硅海科技股份有限公司
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