LED (light-emitting diode) constant-current driving power supply with high power factor and wide voltage range

A voltage range, constant current drive technology, applied in the direction of electric light source, lamp circuit layout, light source, etc., can solve the problems of limited output voltage range, high manufacturing and use cost, low power factor, etc., achieve high conversion efficiency and reduce manufacturing cost. Cost and use cost, low effect required

Inactive Publication Date: 2013-04-17
LIAONING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many types of existing LED constant current drive power supplies, but most of them have limited output voltage range and low power factor, and the general conversion efficiency is only 80%~90%, while the constant current drive power supply with conversion efficiency higher than 90% has complex structure and difficult manufacturing and high cost

Method used

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  • LED (light-emitting diode) constant-current driving power supply with high power factor and wide voltage range
  • LED (light-emitting diode) constant-current driving power supply with high power factor and wide voltage range

Examples

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Embodiment Construction

[0012] Such as figure 1 As shown: the embodiment of the present invention is provided with an EMI filter circuit, the output of the EMI filter circuit is connected to the power factor correction circuit after being divided by the voltage divider circuit, and the zero current detection circuit and the output circuit are connected to the power factor correction circuit, and the output The circuit feeds back the current signal to the power factor correction circuit through the current detection circuit, and the output circuit also feeds back the undervoltage and overvoltage signals to the power factor correction circuit.

[0013] Specific lines such as figure 2 Shown: The power factor correction circuit is the power factor correction chip IC1 (Ka7526). The voltage divider circuit is composed of resistors R1, R2, R3 connected in series, the contact point of resistor R2 and resistor R3 is connected with the "3" pin of the power factor correction chip IC1, and the "7" pin of the ...

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PUM

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Abstract

The invention discloses an LED (light-emitting diode) constant-current driving power supply which is simple in structure, high in power factor and wide in input/output voltage range and can reduce the utilization cost. The LED constant-current driving power supply is provided with an EMI (Electro-Magnetic Interference) filter circuit, wherein after being subjected to voltage division by a voltage division circuit, the output of the EMI filter circuit is connected with a power factor correcting circuit; a zero current detecting circuit and an output circuit are connected with the power factor correcting circuit; the output circuit feeds back a current signal to the power factor correcting circuit through a current detecting circuit; and the output circuit also respectively feeds back undervoltage and overvoltage signals to the power factor correcting circuit through an undervoltage detecting circuit, an undervoltage feedback circuit, an overvoltage detecting circuit and an overvoltage feedback circuit correspondingly.

Description

technical field [0001] The invention relates to an LED constant-current driving power supply, in particular to an LED constant-current driving power supply with a simple structure, high power factor, wide input (output) voltage range and cost reduction, high power factor and wide voltage range. Background technique [0002] At present, LED has been widely used in many fields due to its small size, light weight, low energy consumption, safety and reliability, and long life (up to 100,000 hours). Since the brightness of the LED is controlled by adjusting the current, a constant current drive power supply is required to convert the power supply (high-voltage power frequency AC, low-voltage power frequency AC, low-voltage DC, high-voltage DC, etc.) into a specific voltage and current. There are many types of existing LED constant current drive power supplies, but most of them have limited output voltage range and low power factor, and the general conversion efficiency is only 80...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 周芸张华刘明日顾吉林汤立中赵静李梦轲
Owner LIAONING NORMAL UNIVERSITY
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