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LED driver and LED lighting device

A technology of LED drivers and electronic ballasts, applied in the field of power electronics, can solve the problems of high cost, difficulty in coordinated control of two-stage circuits, and large volume

Inactive Publication Date: 2015-04-08
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] Due to the need to set up a two-stage converter, the existing LED driver based on electronic ballasts is expensive and bulky, and there are difficulties in the coordinated control of the two-stage circuit

Method used

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  • LED driver and LED lighting device
  • LED driver and LED lighting device
  • LED driver and LED lighting device

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Embodiment Construction

[0037] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the invention, some specific details are set forth in detail. The present invention can be fully understood by those skilled in the art without the description of these detailed parts. In order not to obscure the essence of the present invention, well-known methods, procedures, procedures, components and circuits have not been described in detail.

[0038] Additionally, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

[0039] Meanwhile, it should be understood that in the following description, "circuit" refers to a conductive loop formed by at least one element or sub-circuit through electrical connection or electromagnetic connection. When an element or circuit is said to be "connected to" another eleme...

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Abstract

The invention discloses an LED driver and an LED lighting device. A rectifier bridge and a rectifier and filter circuit are connected to the output port of an electronic ballast to output direct current to drive an LED load. The input end of the rectifier and filter circuit is short-circuited periodically by a power switch; the average current flowing into the LED load can be controlled and constant current control can be realized. As a result, the LED load can be driven based on the output of the electronic ballast without an inductance element; as a result, the circuit structure is simple, the cost is low and the volume is small. Meanwhile, the control difficulty is relatively low.

Description

technical field [0001] The invention relates to power electronics technology, in particular to an LED driver and an LED lighting device. Background technique [0002] Electronic ballast (Electrical Ballast) is a kind of ballast, which refers to the electronic control that converts DC or low-frequency AC voltage into high-frequency AC voltage to drive low-voltage gas discharge lamps (germicidal lamps), tungsten halogen lamps and other light sources. device. Since the electronic ballast does not have the function of constant voltage output or constant current output, and only transmits energy through self-excited oscillation, the electronic ballast cannot be directly used to drive LED (light-emitting diode) loads that require a dedicated DC power supply. [0003] In the prior art, an LED driver is generally formed by cascading a rectifier bridge, a step-up converter and a step-down converter at an output port of an electronic ballast. Such as figure 1 As shown, the rectifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCY02B20/30H05B45/38H05B45/395H05B45/375
Inventor 陈惠强黄秋凯
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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