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LED adjustable voltage-regulated driving power supply based on overvoltage protection circuit

A technology of overvoltage protection circuit and drive power supply, which is applied in the electronic field, can solve the problems of small output voltage adjustable range, and achieve the effects of improving voltage regulation accuracy, reducing power consumption, and improving efficiency

Inactive Publication Date: 2016-10-12
CHENGDU CHUANTONGDA 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 defect that the output voltage adjustable range of the LED adjustable power supply in the prior art is small, and to provide an LED adjustable and stable voltage driving power supply based on an overvoltage protection circuit

Method used

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  • LED adjustable voltage-regulated driving power supply based on overvoltage protection circuit
  • LED adjustable voltage-regulated driving power supply based on overvoltage protection circuit

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Embodiment

[0019] like figure 1 As shown, the present invention is mainly composed of a transformer T, a diode rectifier U1, a diode rectifier U2, a one-way thyristor VS, and the N pole is connected to the positive output end of the diode rectifier U1 through a resistor R1, and the P pole is connected to the diode rectifier U1 through a resistor R2. Zener diode D1 connected to the negative output terminal of the diode rectifier U2, the positive pole connected to the positive output terminal of the diode rectifier U2, the polarity capacitor C5 connected to the negative pole output terminal of the diode rectifier U2, respectively connected to the N pole of the Zener diode D1 A base trigger circuit connected to the negative output terminal of the diode rectifier U1, a three-terminal voltage stabilizing circuit respectively connected to the cathode of the one-way thyristor VS and the base trigger circuit, and a series connection between the negative output terminal of the diode rectifier U2 a...

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Abstract

The invention discloses an LED adjustable voltage-regulated driving power supply based on an overvoltage protection circuit. The LED adjustable voltage-regulated driving power supply is characterized by mainly comprising a transformer T, a diode rectifier U1, a diode rectifier U2, a one-way thyristor VS, a voltage regulator diode D1, a polar capacitor C5, a base trigger circuit, a three-terminal voltage regulator circuit connected with the cathode of the one-way thyristor VS and the base trigger circuit, and an overvoltage protection circuit connected in series between the negative output end of the diode rectifier U2 and the three-terminal voltage regulator circuit. A voltage regulator chip U3 adopted in the invention is an LM317 integrated chip, and the chip and a peripheral circuit are combined to realize suspended power supply. Moreover, voltage pre-adjustment can be realized through the thyristor, 6-12V adjustable voltage can be output, and thus, output of a wide-range adjustable voltage is ensured.

Description

technical field [0001] The invention relates to the field of electronics, and specifically relates to an adjustable voltage-stabilized drive power supply for LEDs based on an overvoltage protection circuit. Background technique [0002] Under the background of global energy shortage and increasing environmental protection requirements, countries all over the world are vigorously developing green energy-saving lighting. As a revolutionary energy-saving lighting technology, LED lighting is developing rapidly, among which the brightness of dimmable LED can be adjusted according to the brightness of the environment and it is widely used by people. However, the existing LED adjustable power supply has the problem of a small adjustable range of the output voltage, resulting in little change in the brightness of the dimmable LED lamp, thus failing to meet people's requirements. [0003] Therefore, it is urgent to provide an adjustable LED power supply whose output voltage can be a...

Claims

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Application Information

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IPC IPC(8): H05B33/08H05B44/00H05B45/10H05B45/37
CPCH05B45/50H05B45/37H05B45/10Y02B20/30
Inventor 不公告发明人
Owner CHENGDU CHUANTONGDA TECH CO LTD
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