LED driving circuit compatible to different types of ballast

Abstract

An embodiment of the invention discloses an LED driving circuit compatible to different types of ballast. The LED driving circuit comprises two rectification circuits, a filter circuit, a high-voltage absorption circuit and an LED constant-current circuit. The filter circuit, the high-voltage absorption circuit and the LED constant-current circuit are sequentially arranged at output ends of the rectification circuits in a parallel connection manner, input ends of the filter circuit, the high-voltage absorption circuit and the LED constant-current circuit are connected with the output ends of the rectification circuits, and the rectification circuits are used for rectifying output or AC input of the electronic ballast and the inductance ballast; the filter circuit is used for filtering output of the rectification circuits; the high-voltage absorption circuit is used for absorbing high voltages when the high voltages are outputted by the electronic ballast; the LED constant-current circuit is used for providing constant-current voltages required when LED load works.

Description

technical field [0001] The invention relates to the technical field of LED driving, in particular to an LED driving circuit compatible with various ballasts. Background technique [0002] Electronic ballast refers to electronic equipment that uses electronic technology to drive electric light sources to produce the required lighting. Corresponding to it is an inductive ballast (or ballast). More and more modern fluorescent lamps use electronic ballasts, which are light and compact, and can even integrate electronic ballasts with lamp tubes. Go for the starter alone. Electronic ballasts can also have more functions, such as improving or eliminating the flickering phenomenon of fluorescent lamps by increasing the current frequency or current waveform (such as becoming a square wave); it is also possible to use DC power for fluorescent lamps through the power inverter process. Some disadvantages of the traditional inductive rectifier make it being replaced by increasingly ma...

AI Technical Summary

Problems solved by technology

[0003] With the application of LED technology, more and more energy-saving fluorescent tubes (PL tubes) are replaced by LED tubes, but the problem that follows is that the electronic ballasts or inductive ballasts set before In the circuit or embedded in the wall, the LED lamp replaces the energy-saving fluorescent lamp with a large workload

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