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Totem pole light-emitting diode (LED) driving power source

A technology of LED driving and totem pole, applied in electric light source, light source, electric lamp circuit layout, etc., can solve the problems of high cost and complicated circuit, and achieve the effect of extremely low cost, simple circuit and high-precision control

Inactive Publication Date: 2013-04-24
ZHUHAI HUASAI ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the PWM power management scheme usually adopts optocoupler and TL431 detection technology, which has high cost and complex circuit

Method used

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  • Totem pole light-emitting diode (LED) driving power source
  • Totem pole light-emitting diode (LED) driving power source
  • Totem pole light-emitting diode (LED) driving power source

Examples

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Embodiment Construction

[0020] refer to Figure 1 to Figure 2 , a totem pole LED drive power supply of the present invention, comprising a rectification filter circuit 1, a PFM pulse frequency modulation circuit 2, a MOSFET tube Q1, a DC / DC conversion circuit 4, and a totem pole circuit 3, the rectification filter circuit 1, The PFM pulse frequency modulation circuit 2, the totem pole circuit 3, the MOSFET tube Q1, and the DC / DC conversion circuit 4 are connected in sequence. The rectification and filtering circuit 1 is connected to an AC power supply, and the rectification and filtering circuit 1 converts the unstable alternating current into a stable direct current, and the rectified and filtered direct current is provided by the PFM pulse frequency modulation circuit 2, the MOSFET tube Q1, and the DC / DC conversion circuit 4 Working voltage: PFM pulse frequency modulation circuit 2 works in DCM current discontinuous mode. When the power is constant, it performs self-frequency adjustment according t...

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PUM

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Abstract

The invention discloses a totem pole light-emitting diode (LED) driving power source which comprises a rectification filter circuit, a pulse frequency modulation (PFM) circuit, a metal-oxide -semiconductor field effect transistor (MOSFET) pipe, a DC / DC (direct current / direct current) changing circuit, and a totem pole circuit, wherein the rectification filter circuit, the PFM circuit, the totem pole circuit, the MOSFET pipe, and the DC / DC changing circuit are connected with each other sequentially. The high-power LED driving power source is simple in circuit, low in cost and stable in performance. The totem pole LED driving power source adopting the PFM ensures that high-precision control can be achieved as well under the condition of eliminating an optocoupler and a TL431 and no-load power consumption is reduced. In addition, the totem pole circuit is increased under the condition of an interrupted operating mode, driving power of the driving power source is improved, and therefore totem pole LED driving power source is applicable to high-power LED lighting equipment.

Description

technical field [0001] The invention relates to an LED driving power supply, in particular to a totem pole LED driving power supply. Background technique [0002] In recent years, LEDs have been widely used due to their advantages of high efficiency, energy saving, environmental protection, long life, and high reliability. Especially with the development of new materials and the improvement of manufacturing processes, high-brightness and high-power lighting LEDs have developed rapidly, greatly replacing incandescent LEDs. Lamps, fluorescent lamps, etc. have become new light sources in the field of general lighting. Therefore, the development of high-power LED drive power supply has a very broad market prospect. However, with the development of LED technology, the design requirements for LED driving power supply are getting higher and higher, which not only require its high efficiency and high reliability, but also require the driving power supply to be small in size, simple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 熊本刚
Owner ZHUHAI HUASAI ELECTRONICS TECH CO LTD
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