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Multi-circuit processing type LED constant current driving power supply

A constant current drive, processing technology, applied in the field of electronics, can solve the problems of unstable output voltage and current, and achieve the effect of maintaining stable output current, ensuring stability, and suppressing abnormal fluctuations.

Inactive Publication Date: 2016-10-26
成都奥卡卡科技有限公司
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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 of unstable output voltage and current in the LED power supply in the prior art due to external electromagnetic wave interference, and provide a multi-circuit processing type LED constant current drive power supply

Method used

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  • Multi-circuit processing type LED constant current driving power supply
  • Multi-circuit processing type LED constant current driving power supply
  • Multi-circuit processing type LED constant current driving power supply

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Embodiment

[0021] Such as figure 1 As shown, the present invention is mainly composed of control chip U2, diode rectifier U1, triode VT1, triode VT2, resistor R7, resistor R8, resistor R11, polar capacitor C1, polar capacitor C5, diode D5, current detection circuit, overvoltage protection Circuit, surge voltage suppression circuit, and field effect constant current drive circuit.

[0022] When connected, the anode of the polarity capacitor C1 is connected to the anode output terminal of the diode rectifier U1, and its cathode is connected to the negative output terminal of the diode rectifier U1. The positive pole of the polarity capacitor C5 is connected to the base of the triode VT1, and its negative pole is connected to the collector of the triode VT2 through the resistor R7. The N pole of the diode D5 is connected to the DRV pin of the control chip U2 through the resistor R11, and its P pole is connected to the base of the transistor VT2 through the resistor R8. The overvoltage pro...

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Abstract

The invention discloses a multi-circuit processing type LED constant current driving power supply which is characterized in that the multi-circuit processing type LED constant current driving power supply is mainly composed of a control chip U2, a diode rectifier U1, a triode VT1, a triode VT2, a polar capacitor C1, a polar capacitor C5, a diode D5, an overvoltage protection circuit, a surge voltage suppression circuit, a field effect constant current driving circuit and a current detection circuit which is connected in series between the DRV pin of the control chip U2 and the field effect constant current driving circuit. Transient high voltage of input voltage can be eliminated or suppressed, the voltage withstanding performance of voltage can be enhanced and middle null offset of current can be controlled so that output of stable voltage and current can be ensured, the stability of LED lamp brightness can be effectively ensured and the service life of the LED lamp can be effectively prolonged.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a multi-circuit processing type LED constant current drive power supply. Background technique [0002] As a new type of energy-saving light source, LED lights have been widely accepted and adopted by people due to their environmental protection, energy saving, long life, and small size. Since the LED is a semiconductor device with sensitive characteristics and has negative temperature characteristics, the LED power supply plays a very important role in promoting the LED to be in a stable working state during the application process. The currently used LED power supply has the problem of unstable output voltage and current due to external electromagnetic wave interference, resulting in unstable brightness of the LED lamp, thereby affecting the service life of the LED lamp. [0003] Therefore, it is urgent to provide an LED constant current power supply that can output stable voltage an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00H05B45/345
CPCH05B45/50H05B45/37
Inventor 不公告发明人
Owner 成都奥卡卡科技有限公司
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