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Energy-saving power circuit for constant-current drive type cold light LED

A constant current drive, energy-saving power supply technology, applied in the field of electronic energy conservation, can solve the problems of unstable output current, poor load capacity, etc., and achieve the effects of prolonging service life, strong driving ability, and strong stability

Inactive Publication Date: 2016-08-17
CHENGDU ANGDIJIA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of poor load capacity and unstable output current in the LED voltage circuit in the prior art, and provide an energy-saving power supply circuit for constant current drive type cold light LED

Method used

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  • Energy-saving power circuit for constant-current drive type cold light LED
  • Energy-saving power circuit for constant-current drive type cold light LED

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Embodiment

[0020] Such as figure 1 As shown, the present invention is mainly composed of a control chip U2, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C5, an inductor L1, a constant current drive circuit, a thyristor trigger circuit, a reference current correction circuit, and a low-pass filter circuit composition.

[0021] In practice, the negative pole of the polarity capacitor C1 is connected to the positive output terminal of the diode rectifier U1, and its positive pole is connected to the negative output terminal of the diode rectifier U1. The negative pole of the polarity capacitor C5 is connected to the CS pin of the control chip U2, and its positive pole is connected to the RE pin of the control chip U2 after passing through the inductor L1. One end of the resistor R9 is connected to the positive pole of the polarity capacitor C5, and the other end is connected to the GND pin of the control chip U2 and then grounded. The constant current dri...

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Abstract

The invention discloses an energy-saving power circuit for a constant-current drive type cold light LED. The power circuit is characterized by being mainly composed of a control chip U2, a reference current correcting circuit, a thyristor trigger circuit, a transformer T, a diode rectifier U1, a polar capacitor C1, a polar capacitor C5, a resistor R9, a constant-current drive circuit and a low-pass filtering circuit, wherein the constant-current drive circuit is connected with the non-dotted terminal and the dotted terminal of a transformer T secondary side induction coil, and the low-pass filtering circuit is connected between the diode rectifier U1 and the transformer T in series. By means of the energy-saving power circuit, filtering processing can be carried out on the voltage and current of the input end, the input voltage and current are more stable, the strength of the filtered voltage and current is adjusted, and movement of electromagnetic waves of the current is kept in a uniform speed state, so that stable working current can be output, and the stability of brightness of an LED lamp is ensured.

Description

technical field [0001] The invention relates to the field of electronic energy saving, in particular to an energy-saving power supply circuit for a constant current driven cold light LED. Background technique [0002] At present, due to the characteristics of low energy consumption, long service life, safety and environmental protection, LED lamps have become one of the mainstream products for people's living lighting. Since LED lamps are different from traditional incandescent lamps, they need to be driven by a dedicated power supply circuit. However, the current power supply circuit used in LED lamps is not only vulnerable to external voltage fluctuations, but also has poor load capacity and unstable output current, which leads to unstable brightness, power consumption, and short service life of LED lamps. [0003] Therefore, it is urgent to provide an LED power supply circuit that can not only increase the load capacity, but also ensure the stability of the output curren...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/50
Inventor 周建英
Owner CHENGDU ANGDIJIA TECH CO LTD
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