LED driver and LED lighting device

An LED driver and node technology, applied in the field of light source driver design, can solve problems such as low driving efficiency, poor load regulation, and LED light source load damage, and achieve the effect of excellent load regulation

Active Publication Date: 2020-02-11
SHANGHAI LUMIXESS TECH
View PDF15 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The driving efficiency of this scheme is very high, and there is very little high-frequency oscillation in the resonant tank, but the load regulation of this scheme is very poor. For example, the LED driver designed is one-to-two (one power supply with two light bars) The driver, when driving an LED light source load including only one light bar, the load current will double, which may cause the LED light source load to be overheated and damaged
[0006] Therefore, in summary, the LED driver in the prior art has the technical problems of being unable to take into account low driving efficiency and poor load regulation.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • LED driver and LED lighting device
  • LED driver and LED lighting device
  • LED driver and LED lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] As mentioned in the background art section, the LED driver that can be used to drive the LED light source in the prior art cannot take into account both the driving efficiency and the load regulation rate, and cannot meet the market demand.

[0030] The inventor of the present application analyzed an LED driver using a series resonance scheme in the prior art.

[0031] figure 1 It is a schematic structural block diagram of an LED driver in the prior art. Such as figure 1As shown, the LED driver 100 in the prior art may include a half-bridge circuit composed of a capacitor C2A, a capacitor C2B, a switch tube Q1 and a switch tube Q2, an electrolytic capacitor C1, current limiting resistors R1 and R2, a driving circuit, and a series resonance The capacitor C3 and the inductor T4A of the circuit, the LED load (not shown in the figure) and the current-limiting capacitors C4A and C4B connected in parallel to both ends of the inductor T4A. figure 1 The shown LED load includ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An LED driver and an LED lighting device. The LED driver includes: a bridge circuit including first to fourth bridge arms, a first node between the first and second bridge arms, and a bridge between the second and third bridge arms. A second node, a third node between the third and fourth bridge arms, a fourth node between the fourth and first bridge arms, a DC voltage input between the fourth and second nodes, the first bridge arm includes a first Transistors, the second bridge arm includes a second transistor, the first and second transistors are controlled and turned on alternately; a parallel resonant circuit, coupled between the first and third nodes, includes a parallel resonant inductor and a resonant capacitor, parallel resonant The circuit is suitable for driving LED loads; the excitation source circuit is suitable for providing excitation current for the parallel resonant circuit; the starting circuit is suitable for controlling the conduction of the second transistor after the DC voltage is established, so that the parallel resonant circuit starts to vibrate. The LED driver of the invention has excellent load regulation rate and high driving efficiency.

Description

technical field [0001] The invention relates to the field of light source driver design, in particular to an LED driver and an LED lighting device. Background technique [0002] In the field of lighting, fluorescent lamp is a traditional light source. It is a low-pressure gas discharge lamp, which exhibits negative resistance characteristics during operation. Most of them need a matching electronic ballast during operation. The LED light source has shown a wide range of application prospects due to its advantages of high light efficiency, long life and low cost. In more and more application scenarios, people prefer to replace traditional fluorescent lamps with LED light sources. [0003] In the prior art, when replacing a fluorescent lamp with an LED light source, in order not to dismantle the electronic ballast, an LED light source compatible with the electronic ballast can be directly selected, so that only the old fluorescent lamp needs to be simply removed and replaced ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00Y02B20/30
Inventor 陈忠王新胜陈亮邬秋峰
Owner SHANGHAI LUMIXESS TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products