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Control circuit, control chip and power supply system

A technology of control circuit and control signal, applied in control/regulating system, electrical components, regulating electrical variables, etc., can solve the problems of high withstand voltage and high cost

Active Publication Date: 2021-07-06
SHANGHAI XINLONG SEMICON TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a control circuit, a control chip and a power supply system to solve the problems of high withstand voltage and high cost of the LED constant current drive chip in the prior art

Method used

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  • Control circuit, control chip and power supply system
  • Control circuit, control chip and power supply system
  • Control circuit, control chip and power supply system

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Embodiment Construction

[0083] In order to make the purpose, advantages and features of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in very simplified form and not drawn to scale, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention. In addition, the structures shown in the drawings are often a part of the actual structures. In particular, each drawing needs to display different emphases, and sometimes uses different scales.

[0084]As used in the present invention, the singular forms "a", "an" and "the" include plural objects, the term "or" is usually used in the sense of including "and / or", and the term "several" Usually, the term "at least one" is used in the meaning of "at least one", and the term "at least two" is usually used in the meaning of "two or more". In a...

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PUM

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Abstract

The invention provides a control circuit, a control chip and a power supply system. The power supply system comprises a control chip, wherein the voltage of the output end of the power supply system is smaller than that of the input end of the power supply system, the control chip takes electricity from the output end of the power supply system, and the control circuit works according to preset logic to ensure that the control chip works normally. Through the configuration, the voltage withstanding requirement of the control chip is reduced, the manufacturing cost is reduced, and the problems that in the prior art, the voltage withstanding requirement of an LED constant-current driving chip is high, and the cost is high are solved. The power supply system has the advantages of being simple in structure and small in number of peripheral elements.

Description

technical field [0001] The invention relates to the technical field of power chips, in particular to a control circuit, a control chip and a power supply system. Background technique [0002] Traditional LED constant current driver chips for high input voltages take power from the input terminal, which requires relatively high withstand voltage for the chip, resulting in relatively high chip costs, which is not conducive to the promotion and application of LED constant current driver chips. Contents of the invention [0003] The invention provides a control circuit, a control chip and a power supply system to solve the problems of high withstand voltage and high cost of LED constant current drive chips in the prior art. [0004] In order to solve the above technical problems, according to the first aspect of the present invention, a control circuit is provided, the control circuit includes a bias unit, a comparison unit and a control signal unit; [0005] The bias unit in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B45/345H05B45/34H02M3/156
CPCH02M3/156H05B45/34H05B45/345
Inventor 王建虎李瑞平池伟刘彬
Owner SHANGHAI XINLONG SEMICON TECH CO LTD
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