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LED driving circuit

An LED driver and LED module technology, which is applied in the layout of electric lamp circuits, electric light sources, electrical components, etc., can solve the problems of increasing the cost and design complexity of LED driver circuits, and is not suitable for ordinary occasions, and achieves reduction of power loss, cost reduction effect

Inactive Publication Date: 2015-07-29
GE LIGHTING SOLUTIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, every addition of a switching power supply or every use of a dedicated constant current chip will greatly increase the cost and design complexity of the LED drive circuit, which is not suitable for ordinary applications

Method used

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Embodiment Construction

[0023] Specific implementations of the present invention will be described below. It should be noted that in the process of specific descriptions of these implementations, for the sake of concise description, it is impossible for this specification to describe all the features of the actual implementations in detail. It should be understood that, in the actual implementation process of any embodiment, just like in the process of any engineering project or design project, in order to achieve the developer's specific goals and to meet system-related or business-related constraints, Often a variety of specific decisions are made, and this can vary from one implementation to another. In addition, it will be appreciated that while such development efforts may be complex and lengthy, the technology disclosed in this disclosure will be Some design, manufacturing or production changes based on the content are just conventional technical means, and should not be interpreted as insuffic...

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Abstract

The present invention relates to an LED drive circuit, comprising: a switched-mode power supply (SMPS) used for receiving an external power supply and generating a regulated output voltage according to a regulating signal; a linear power supply circuit used for receiving the output voltage of the SMPS and converting the output voltage into a linear voltage to be provided for an LED module; a ripple signal sampling circuit used for acquiring ripple signals generated by the linear power supply circuit; a ripple signal compensating circuit used for receiving the acquired ripple signals and converting the ripple signals into offset voltage signals; and an output voltage regulator circuit used for receiving voltage feedback signals of the linear power supply circuit and the offset voltage signals, and generating the regulating signal according to the difference between the voltage feedback signals and a reference voltage to regulate the output voltage of the SMPS, the reference voltage being equal to the sum of a preset first reference voltage supply and the offset voltage signals.

Description

technical field [0001] The invention relates to a driving circuit for driving an LED light source. Background technique [0002] As a new type of lighting source, LED has become the development trend of a new generation of lighting sources due to its long life, high luminous efficiency, multiple light colors, one-time light distribution and directional irradiation functions, and the ability to work under safe voltages. [0003] Traditional LED drive circuits usually receive external AC power input (or DC power input) through a switching power supply (Switched-Mode Power Supply, SMPS) and adjust the output to the LED module according to an adjustment signal such as a pulse width modulation (PWM) signal Voltage signal to make it meet the needs of power supply. [0004] The simplest LED drive circuit only includes a one-stage switching power supply. Although this structure is simple, the output voltage provided by the one-stage switching power supply to the LED module is usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
CPCH05B45/3725Y02B20/30
Inventor 黄俊华朱逸民韩万华欧阳昱宇
Owner GE LIGHTING SOLUTIONS LLC