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LED lighting driving system

A technology of LED lighting and drive system, applied in the field of semiconductors, can solve problems such as complex structures, achieve the effects of improving chip heat dissipation performance and chip reliability, simplifying structure, and reducing production costs

Inactive Publication Date: 2016-03-23
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The LED lighting drive system consists of rectification and constant current two parts, the structure is relatively complex

Method used

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Embodiment

[0040] In this embodiment, the transformation ratio of the transformer T1 is 220:110. The first constant current device D1, the second constant current device D2, the third constant current device D3, and the fourth constant current device D4 are all the same constant current devices, and the structural diagram of the constant current devices is as follows Figure 5 As shown, it includes a P-type lightly doped substrate 2, an N-type lightly doped epitaxial layer 3 located on the P-type lightly doped substrate 2, and a diffused P-type well located in the N-type lightly doped epitaxial layer 3. Region 4, the diffused P-type well region 4 is two and located at both ends, the P-type heavily doped region 5 and the N-type heavily doped region 7 located in the diffused P-type well region 4, located in the N-type heavily doped region The depletion channel region 6 between the impurity region 7 and the N-type lightly doped epitaxial layer 3 and embedded in the upper surface of the diff...

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Abstract

The invention provides an LED lighting driving system, and belongs to the technical field of semiconductors. The LED lighting driving system comprises a transformer and a driving chip. The transformer comprises a first AC input end, a second AC input end, a first AC output end and a second AC output end. The driving chip comprises a first constant current device, a second constant current device, a third constant current device and a fourth constant current device. The anode of the first constant current device is connected with the cathode of the fourth constant current device so as to form a first node. The cathode of the first constant current device is connected with the cathode of the second constant current device so as to form a second node. The anode of the second constant current device is connected with the cathode of the third constant current device so as to form a third constant current device. The anode of the third constant current device is connected with the anode of the fourth constant current device so as to form a fourth node. The first AC output end is connected with the first node. The second AC output end is connected with the third node. The structure of the conventional LED lighting driving system is simplified, power consumption of the driving system is reduced and reliability is system is enhanced.

Description

technical field [0001] The invention belongs to the technical field of semiconductors, and in particular relates to an LED lighting driving system. Background technique [0002] The traditional LED lighting driver is generally composed of a rectifier bridge plus one (or more) constant current chips or constant current devices. The constant current device is generally a constant current device similar to the JFET structure, which has the characteristics of bidirectional conduction, that is, in the positive When it works in the opposite direction, it can achieve the effect of constant current. When it works in the reverse direction, it is similar to the conduction mode of ordinary diodes, and has a higher current. When working, AC alternating current is input to the rectifier bridge, and then converted into direct current through filtering capacitors, and then connected in series with constant current chips or constant current devices (such as constant current diodes) to achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 乔明于亮亮李成州方冬何逸涛张波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA