Overvoltage protection white light LED (Light-Emitting Diode) boost conversion system based on frequency compensating circuit

A technology of frequency compensation and boost conversion, which is applied in the field of overvoltage protection white LED boost conversion system, can solve problems such as unable to output constant current, achieve the effects of eliminating oscillation, consistent brightness, and improving stability

Inactive Publication Date: 2016-09-28
成都特普瑞斯节能环保科技有限公司
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect that the existing boost conversion system cannot output a constant current, and to provide an overvoltage protection type white LED boost conversion system based on a frequency compensation circuit

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
  • Overvoltage protection white light LED (Light-Emitting Diode) boost conversion system based on frequency compensating circuit
  • Overvoltage protection white light LED (Light-Emitting Diode) boost conversion system based on frequency compensating circuit
  • Overvoltage protection white light LED (Light-Emitting Diode) boost conversion system based on frequency compensating circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] Such as figure 1 As shown, the present invention is mainly composed of a processing chip U, a constant current output circuit, an overvoltage protection circuit, a frequency compensation circuit, a diode D1, a field effect transistor MOS, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, and a capacitor C1 , capacitor C2, capacitor C3, inductor L1 and inductor L2.

[0019] Wherein, the constant current output circuit is connected to the VAUX pin of the processing chip U. The frequency compensation circuit is connected with the L pin of the processing chip U. One end of the inductor L1 is connected to the N pole of the diode D1, and the other end thereof is connected to the drain of the field effect transistor MOS after passing through the resistor R5. The overvoltage protection circuit is connected in series between the connection point of the resistor R5 and the inductor L1 and the constant current output circuit. The anode of the capacitor ...

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 discloses an overvoltage protection white light LED (Light-Emitting Diode) boost conversion system based on a frequency compensating circuit. The overvoltage protection white light LED boost conversion system is characterized by mainly consisting of a processing chip U, a diode D1, a field effect transistor MOS (Metal Oxide Semiconductor), a frequency compensating circuit and a constant-current output circuit, wherein the frequency compensating circuit is connected with an L pin of the processing chip U; and the constant-current output circuit is connected with a VOUT pin of the processing chip U. In the boost conversion system, a TPS61200 integrated chip is creatively combined with a novel peripheral circuit, so that constant current can be output; constant-current driving is provided for a white light LED; brightness change of the white light LED caused by voltage change is avoided; and the brightness of a plurality of white light LEDs is kept consistent. The overvoltage protection white light LED boost conversion system can be shut down automatically under overvoltage, so that the white light LED is protected from being damaged by the overvoltage. Meanwhile, the phenomenon of oscillation in the system can be avoided, and the stability of the overvoltage protection white light LED boost conversion system is enhanced greatly.

Description

technical field [0001] The invention relates to the field of temperature control, in particular to an overvoltage protection white LED boost conversion system based on a frequency compensation circuit. Background technique [0002] Currently, color LCD displays are widely used in portable products, and white LEDs are used as backlights. In order to make white LEDs work, a boost conversion system is now usually used to power white LEDs. However, the existing boost conversion system cannot output a constant current, that is, it cannot provide constant current drive to the white LED, which causes the brightness of the white LED to change when the battery voltage changes, or the brightness of multiple white LEDs does not match. . Contents of the invention [0003] The purpose of the present invention is to overcome the defect that the existing boost conversion system cannot output a constant current, and provide an overvoltage protection type white LED boost conversion syste...

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): H05B33/08H05B44/00
CPCH05B45/50H05B45/37Y02B20/30
Inventor 不公告发明人
Owner 成都特普瑞斯节能环保科技有限公司
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

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap