Insulation type general use illumination LED driving circuit

An LED driving and isolated technology, applied in the electronic field, can solve the problems of large peak voltage, poor reliability of non-isolated LED driving circuit, low power utilization rate of LED driving circuit, etc., to save peripheral circuits, small size, low cost effect
CN101227779BInactive Publication Date: 2011-10-05UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2011-10-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention belongs to the electronic technical field and relates to a versatile lighting LED driving circuit. The invention comprises an input rectifier circuit, a power factor correction (PFC) control circuit, a transformer surge current and peak voltage absorption circuit, an optical coupler isolation feedback circuit, an isolated switching transformer and an unidirectional rectifier output circuit. The invention takes a power management chip NCP1653 of the OnSemi Company as a control core, primary current of the switching transformer is checked to realize the power factor correction function, a circuit topological structure is a flyback isolated type, the working mode is a continuous conduction mode, the circuit topological structure has the functions of power factor correction, light modulation, constant current constant voltage output and absorbing the surge current of switch element guide circuit instant and the peak voltage of cutting instant, simultaneously, since the invention adopts the power management chip NCP1653, a large amount of peripheral circuit can be saved, and thereby the invention is has the advantages of low cost and small volume and is suitable for batchproduction.
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Description

technical field

[0001] The invention belongs to the field of electronic technology, and relates to a general lighting LED (light emitting diode) driving circuit, in particular to an isolated high-reliability lighting LED driving circuit. Background technique

[0002] LED lighting technology has the advantages of energy saving, environmental protection, long life and easy control. It is one of the most promising high-tech fields in the 21st century. It will replace incandescent lamps and fluorescent lamps and become the leading lighting market. Under such a bright prospect of the LED lighting industry, various LED lamp driving circuits are also developing rapidly for different applications in the lighting field, and most of them adopt switching power supply technology. However, many LED drive circuits currently use non-isolated drive structures or isolated drive structures without power factor correction (PFC) functions. Non-isolated LED drive circuits have poor reliability, ...

Claims

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