LED driver system with energy storage function

An LED driver and energy storage technology, applied in energy-saving control technology, lighting devices, light sources, etc., can solve the problems of inability to perform indoor lighting, LEDs cannot operate normally, and low power factor.

Active Publication Date: 2013-02-06
常州矽能电子科技有限公司
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Problems solved by technology

The power factor of general switching power supply is usually relatively low, only the switching power supply using PFC (power factor correction) technology can have a high power factor
[0008] In terms of performance, the existing LED drive power supply mainly pursues the size of output power and output stability, but it does not perform well in terms of power factor and efficiency. It is the design of high power factor and high ef

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  • LED driver system with energy storage function
  • LED driver system with energy storage function
  • LED driver system with energy storage function

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Embodiment

[0069] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0070] The schematic diagram of the AC-DC conversion part of the energy storage LED driver system is as follows: figure 2 shown. It mainly includes off-chip main topology module and on-chip control module. The working principle of the main topology module is as follows: Diodes D1, D2, D3, and D4 form a full-bridge rectifier circuit to convert high-voltage AC input into high-voltage DC input. After the high-voltage DC input voltage is filtered by the capacitor C1, the high-frequency components are filtered out, and then added to the main coil on the source side. When the power switch tube P1 is turned on, current flows through the main coil on the source side, and the current of the main coil on the source side is sampled into the CS pin of the on-chip control circuit through the sampling network R11 and R12, and no current flows th...

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Abstract

The invention relates to an LED driver system with an energy storage function. The LED driver system can work in three working modes. In an illuminating mode, input alternating-current power is outputted to a constant-current/constant-voltage outputting AC-DC converter with a power factor correction function to directly power an LED lamp; in a charging mode, the LED lamp stops working, inputted alternating-current power is supplied for a lithium battery pack module via the AC-DC converter, and energy is stored; and in a battery power supply mode, a charged lithium battery management module supplies power for the LED lamp via a constant-current outputting DC-DC converter. The LED driver system further comprises an intelligent switching module, switching among the three modes is realized under the control of a single chip microcomputer, the three modes are guaranteed against being interfered by one another, and normal running of the integral system is guaranteed. The power factor of the LED driver system can be higher than 0.9, the efficiency of the LED driver system is higher than 80%, the LED lamp can be powered continuously for a long time when in power failure, and normal operation of the LED lamp during power interruption is guaranteed.

Description

technical field [0001] The invention relates to an LED driver system, in particular to an energy storage LED driver system. Background technique [0002] With the rapid development of industry, the demand for energy in the society has increased sharply, especially in terms of electricity, there will often be shortages. In some industrially developed cities, urban power rationing measures will be taken, which seriously affects the normal life order of the city. Therefore, energy-saving technology, especially power-saving technology, has become a research hotspot today. In this context, LED lighting technology has emerged as the times require, and has the tendency to replace the existing general lighting technology. In today's increasingly prominent energy and environmental issues, the effect of energy saving and emission reduction is becoming more and more important, and the demand for LED lighting is also very urgent. Under the premise of imperfect alternative energy sourc...

Claims

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Application Information

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IPC IPC(8): H05B37/02
CPCY02B20/42Y02B20/40
Inventor 江金光李森谭高建保欢
Owner 常州矽能电子科技有限公司
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