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Primary side feedback single-stage active PFCLED constant current driving chip and equipment

A technology of constant current drive chip and primary side feedback, applied in the direction of electrical components, etc., can solve the problem of constant current chip voltage and negative voltage compensation technology, limited open circuit and short circuit protection functions, difficult to achieve line voltage regulation rate and load regulation rate, It does not have problems such as integrated active power factor correction circuit, and achieves the effect of strengthening system reliability, excellent line voltage regulation rate and load regulation rate, and high-precision output constant current control

Pending Publication Date: 2022-07-29
广州市力驰微电子科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The primary-side feedback single-stage active PFC LED constant current drive chip and equipment proposed by the present invention solve the problem that the existing common constant current control chip does not have an integrated active power factor correction circuit, resulting in a low power factor and relatively low total harmonics. High, so that the loss is large when the circuit is switched. At the same time, the ordinary constant current chip has very limited functions in voltage and negative voltage compensation technology, open circuit and short circuit protection, and it is difficult to achieve efficient line voltage regulation and load regulation. The problem with the protection restart function of

Method used

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  • Primary side feedback single-stage active PFCLED constant current driving chip and equipment
  • Primary side feedback single-stage active PFCLED constant current driving chip and equipment
  • Primary side feedback single-stage active PFCLED constant current driving chip and equipment

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Embodiment 1

[0048] refer to Figure 4-Figure 10 As shown, the primary-side feedback single-stage active PFCLED constant-current driver chip includes a chip body, and the chip body is provided with a startup module, a constant-current control module, a feedback network module, and a system protection module;

[0049] Start-up module: After the system is powered on, the bus voltage charges the capacitor of the VCC pin through the start-up resistor. When the VCC voltage rises to the start-up threshold voltage, the internal control circuit of the chip starts to work, the COMP voltage is quickly pulled up to 1.0V and the chip The main body starts to output pulse signal, the system just starts to work at a low switching frequency, the COMP voltage starts to rise gradually from 1.0V, and the peak current of the primary side rises accordingly, so as to realize the soft start of the output LED current and effectively prevent the output current from overshoot, When the output voltage is established...

Embodiment 2

[0070] refer to Figure 1-Figure 3 As shown, the primary-side feedback single-stage active PFCLD constant-current driving chip device includes a first conveyor belt 1 and a second conveyor belt 2, and a chip body is provided between the first conveyor belt 1 and the second conveyor belt 2 The flipping mechanism 3 turned upside down, and between the flipping mechanism 3 and the first conveyor belt 1 and the second conveyor belt 2, a slide rail 4 for peeling off the chip body and the flipping mechanism 3 is provided, and the flipping mechanism 3 includes an outer cylinder 301, an inner cylinder 302, the bracket 303, the motor 304, and the outer cylinder 301 and the inner cylinder 302 are rotated and sleeved, the end of the inner cylinder 302 away from the outer cylinder 301 is fixedly connected to the bracket 303, the bracket 303 is fixedly connected to the first conveyor belt 1, and the shell of the motor 304 The body is fixedly connected with the bracket 303, and the end of th...

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Abstract

The invention discloses a primary side feedback single-stage active PFCLED constant-current driving chip and equipment, relates to the field of driving chips, and aims to solve the problems that an existing common constant-current control chip is not provided with an integrated active power factor correction circuit, so that the power factor is relatively low, the total harmonic wave is relatively high, the loss is relatively large when a circuit is switched on and switched off, and the cost is relatively high. In order to solve the problems that a common constant current chip is limited in functions of voltage and negative voltage compensation technology and open circuit and short circuit protection, high-efficiency line voltage regulation rate and load regulation rate are difficult to realize, and a perfect protection restart function is not provided, the invention provides the following scheme that the chip comprises a chip body, a starting module, a constant current control module, a feedback network module and a system protection module are arranged in the chip body. The chip effectively solves the problems that a common constant-current control chip is low in power factor, high in total harmonic wave, large in loss when a circuit is switched on and off, difficult to realize high-efficiency line voltage regulation rate and load regulation rate, and not provided with a perfect protection restart function.

Description

technical field [0001] The invention relates to the field of driving chips, in particular to a primary-side feedback single-stage active PFCLED constant-current driving chip and equipment. Background technique [0002] LED lighting has high requirements on the stability of the power supply. Therefore, a constant current control chip needs to be added to the LED lighting equipment circuit. The ordinary constant current control chip on the market does not have an integrated active power factor correction circuit, resulting in a low power factor and at the same time. The high total harmonics make the circuit switching loss larger. At the same time, ordinary constant current chips have very limited functions in voltage and negative voltage compensation technology, open circuit and short circuit protection, and it is difficult to achieve efficient line voltage regulation and load regulation. It also does not have a perfect protection restart function. Therefore, in order to solve...

Claims

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Application Information

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IPC IPC(8): H05B45/345H05B45/50
CPCH05B45/345H05B45/50
Inventor 郑泽建林宇
Owner 广州市力驰微电子科技有限公司
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