Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Single-stage LED driving circuit integrated with Cuk and LLC voltage reduction circuits

A LED drive and circuit technology, applied in the direction of high-efficiency power electronic conversion, electric light source, electrical components, etc., can solve the problems of high cost and poor reliability

Inactive Publication Date: 2018-06-29
FUZHOU UNIV
View PDF8 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The driving power supply of the two-stage structure requires two independent control systems, so its cost is high and its reliability is poor

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
  • Single-stage LED driving circuit integrated with Cuk and LLC voltage reduction circuits
  • Single-stage LED driving circuit integrated with Cuk and LLC voltage reduction circuits
  • Single-stage LED driving circuit integrated with Cuk and LLC voltage reduction circuits

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0050] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0051] Such as figure 1 As shown, this embodiment provides a single-stage LED drive circuit integrating step-down Cuk and LLC converter, including a single-phase AC input power supply v in , the first power diode D 1 , the second power diode D 2 , the third power diode D 3 , the fourth power diode D 4 , the fifth power diode D 5 , the sixth power diode D 6 , the seventh power diode D 7 , the eighth power diode D s1 , the ninth power diode D s2 , the first power switch tube S 1 , the second power switch tube S 2 , High frequency capacitor C 1 , Bus capacitance C bus , output capacitance C o , Resonant capacitance C r , Cuk inductance L 1 , Cuk inductance L 2 , Resonant inductance L r , High frequency transformer T, LED light load.

[0052] The first power diode D 1 The cathode of the third power diode D 3 The cathode an...

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

The invention relates to a single-stage LED driving circuit integrated with Cuk and LLC voltage reduction circuits. The single-stage LED driving circuit comprises a single phase alternating current input power supply Vin, a first power diode D1, a second power diode D2, a third power diode D3, a fourth power diode D4, a fifth power diode D5, a sixth power diode D6, a seventh power diode D7, an eighth power diode Ds1, a ninth power diode Ds2, a first power switch tube S1, a second power switch tube S2, a high frequency capacitor C1, a bus capacitor Cbus, an output capacitor Co, a resonant capacitor Cr, a Cuk inductance L1, a Cuk inductance L2, a resonant inductance Lr, a high frequency transformer T (containing a primary winding Np, a secondary side winding Ns1, a secondary side winding Ns2) and an LED light load. The single-stage LED driving circuit integrated with the Cuk and LLC voltage reduction circuits is oriented to a high voltage input application occasion, high power factor andsoft switch conversion are realized, and cost performance of the LED driving circuit is improved.

Description

technical field [0001] The invention relates to a single-stage LED drive circuit integrating step-down Cuk and LLC circuits, which is applied to AC high-voltage input occasions. Power factor and soft switching conversion. Background technique [0002] Lighting appliances above 25 watts need to meet a series of mandatory related standards, such as IEC555-2, IEC1000-3-2 and other standards. Therefore, the power factor correction (Power Factor Correction—PFC) technology has become a key technology in the field of LED driving circuits. In the case of high-voltage AC input, research on high-efficiency step-down PFC circuits has become a hot spot. [0003] The switching tube of the LLC resonant converter can work in the soft switching mode, and its switching loss can be kept at a very low level, and it has been widely used in medium and high power LED drive systems. Generally, the efficiency of an independent LLC resonant converter is above 90%. The traditional AC input LED dr...

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 Applications(China)
IPC IPC(8): H05B33/08H02M3/335H02M7/48H05B44/00
CPCH02M3/33569H02M7/48H05B45/37H02M1/007H02M7/4815Y02B20/30Y02B70/10
Inventor 林维明曾璐
Owner FUZHOU UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com