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Miniaturization high power output and separation type driving power supply used by LED bulbs

A technology for LED light bulbs and driving power supply, which is applied in the direction of converting irreversible AC power input into DC power output, electric light source, and lamp circuit layout, etc., which can solve the problems of transformers failing to exert their maximum output capability, unable to output power, and volume limitations. , to achieve the effect of miniaturization of power supply, small energy loss and volume reduction

Inactive Publication Date: 2010-03-17
SHENZHEN EASTFIELD LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In the LED drive power supply, since the size of the transformer occupies the main volume, it can be seen that due to the unidirectional change of the magnetic flux, the transformer does not exert its own maximum output capacity, which limits the reduction of its volume, that is Can not output more power under the same volume

Method used

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  • Miniaturization high power output and separation type driving power supply used by LED bulbs
  • Miniaturization high power output and separation type driving power supply used by LED bulbs
  • Miniaturization high power output and separation type driving power supply used by LED bulbs

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1: A miniaturized, high-power output, isolated drive power supply for LED bulbs

[0037] like figure 2 As shown, the LED drive power supply has a power input terminal connected to the industrial frequency AC power supply and a constant current output terminal connected to the LED light-emitting diode group, and a high-voltage rectification filter circuit 1 is set between the power supply input terminal and the constant current output terminal. , a half-bridge oscillation drive control circuit 2, a half-bridge drive circuit 3, a high-frequency transformer 4, a low-voltage rectification filter circuit 5 and a linear constant current drive circuit 6.

[0038] like Figure 8 As shown, the input terminal of the power supply is connected to a high-voltage rectification and filtering circuit 1. The high-voltage rectification and filtering circuit 1 is composed of the first full-bridge rectification circuit BD1 and the first capacitor C1. The input alternating curren...

Embodiment 2

[0047] Embodiment 2: A miniaturized, high-power output, isolated drive power supply for LED light bulbs

[0048] like image 3 As shown, the LED drive power supply has a power input terminal connected to the industrial frequency AC power supply and a constant current output terminal connected to the LED light-emitting diode group, and a high-voltage rectification filter circuit 1 is set between the power supply input terminal and the constant current output terminal. , Self-excited oscillation half bridge drive circuit 7, high frequency transformer 4, low voltage rectification filter circuit 5 and linear constant current drive circuit 6.

[0049] like Figure 9 As shown, the input terminal of the power supply is connected to a high-voltage rectification and filtering circuit 1. The high-voltage rectification and filtering circuit 1 is composed of the first full-bridge rectification circuit BD1 and the first capacitor C1. The input alternating current is added to the first Th...

Embodiment 3

[0055] Embodiment 3: A miniaturized, high-power output, isolated drive power supply for LED light bulbs

[0056] like Figure 4 As shown, the LED drive power supply has a power input terminal connected to the industrial frequency AC power supply and a constant current output terminal connected to the LED light-emitting diode group, and a high-voltage rectification filter circuit 1 is set between the power supply input terminal and the constant current output terminal. , full-bridge oscillation drive control circuit 8, full-bridge drive circuit 9, high-frequency transformer 4, low-voltage rectification filter circuit 5 and linear constant current drive circuit 6.

[0057] like Figure 10 As shown, the input terminal of the power supply is connected to a high-voltage rectification and filtering circuit 1. The high-voltage rectification and filtering circuit 1 is composed of the first full-bridge rectification circuit BD1 and the first capacitor C1. The input alternating current...

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Abstract

The invention provides a miniaturization high power output and separation type driving power supply used by LED bulbs, wherein the power input end is connected with a high voltage rectification filtercircuit (1) for outputting a high voltage DC signal; the invention is characterized in that the high voltage DC signal is connected with an inversion circuit for outputting a high voltage high frequency AC signal, the voltage of the signal alternates in positive and negative directions, and is applied on a primary winding (N1) of a high frequency transformer (T1), so that magnetic flow in the magnetic core can alternates in positive and negative directions, a high frequency low voltage signal is output from a secondary winding (N2) to pass through a low voltage rectification filter circuit (5), a low voltage DC signal is output by the low voltage rectification filter circuit (5) and passes through a linear constant current driving circuit (6) or a PWM switch constant current driving circuit to output a low voltage constant current power supply to drive the LED to shine. As the magnetic core of the high frequency transformer works in quadrant I and III, two times of power can be outputunder the condition of equivalent volume of transformer in comparison with prior art; similarly, under the condition of equivalent output power, the volume thereof can be greatly reduced, thus achieving the aim of power supply miniaturization and high output.

Description

technical field [0001] The invention relates to a driving power supply for an LED light bulb. The LED light bulb mentioned in the invention refers to an integrated whole lamp with an international standard lamp holder (E27, E26, E14, GU10, B22 international standard lamp holder) and an LED as a light source. Background technique [0002] LED lighting source has the advantages of environmental protection, energy saving, long life, etc., and is currently regarded as the most promising lighting source in the 21st century. Due to the characteristics of the LED light-emitting diode itself, its driving power cannot be used as an ordinary power supply like an ordinary incandescent lamp, so as to avoid the voltage fluctuation causing the current to increase and damage the LED light-emitting diode. To meet the required driving requirements, maximize the performance of LED light-emitting diodes, and reduce the failure rate. [0003] In recent years, with the development of LED lighti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H02M1/14H02M7/08
Inventor 唐克毅陆群
Owner SHENZHEN EASTFIELD LIGHTING