LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost

A technology of LED driving and low power consumption, applied in the field of high-efficiency, low-power, low-cost LED driving power supply, can solve the problems of complex assembly process, low power supply efficiency, high power consumption, etc., achieve low standby power consumption, reduce components cost and cost-effectiveness

Inactive Publication Date: 2010-12-22
TPV ELECTRONICS (FUJIAN) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It has the following disadvantages: the price of the double-layer board is higher than that of the single-layer board, the DC to DC converter BD cost of the dedicated driver IC d

Method used

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  • LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost
  • LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost
  • LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0024] Such as figure 1 and figure 2 As shown, the present invention provides a high-efficiency, low-power, and low-cost LED drive power supply, which is characterized in that: it includes an AC-DC circuit and a DC-DC circuit electrically connected in sequence, and the DC-DC circuit combines the described The 16V voltage output by the AC-DC circuit generates a DC 36V voltage to supply power to the LED driver module through the Boost boost loop composed of the boost energy storage inductor, switch tube, Boost boost loop driver chip AZ7500, and boost diode. The loop drive chip AZ7500 has the function of setting the working frequency, soft start function, output OVP detection, and switching tube current OCP detection; The current equalizing loop chip AP3609 of the feedback interface realizes the current equalizing setting of the LED lamp, an...

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Abstract

The invention relates to an LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost, which is characterized by comprising sequentially and electrically connected AC-DC circuit and DC-DC circuit. The DC-DC circuit changes 16V voltage output by the AC-DC circuit into direct current 36V voltage through a Boost circuit to supply power for an LED drive module, wherein the Boost circuit consists of a boost energy-storing inductor, a switch tube, a Boost circuit drive chip AZ7500 and a boost diode; the Boost circuit drive chip AZ7500 is provided with a periphery capable of configuring work frequency and sensing output OVP (Over Voltage Protection) and sensing switch tube current OCP (Over Current Protection) with a soft-start function; an LED lamp low-voltage end of the LED drive module is connected with a current-sharing circuit chip AP3609 with functions of current sharing and over-temperature protection, and the current-sharing circuit chip AP3609 is provided with a serial feedback interface, thus the current-sharing configuration of the LED lamp is realized. An FB (Feedback) end of the AP3609 is connected with the boost chip AZ7500 to realize the current Feedback sensing of the LED lamp. The invention integrates the AC-DC circuit with the DC-DC circuit into a whole, has high work efficiency, simple circuits and better market value, and can realize single-layer plate design.

Description

technical field [0001] The invention relates to the field of power circuits, in particular to an LED driving power supply with high efficiency, low power consumption and low cost. Background technique [0002] At present, the original CCFL lamp tubes of liquid crystal display panels (panel) are gradually replaced by LED lamp tubes. In order to match the LED lamp tubes, the PCB of the current converter BD is basically double-layer board, and the dedicated driver IC Cost prices are higher. In the actual machine application form, it can be inserted into the AC to DC power supply board as an independent DC to DC converter BD or in the form of a back doll. It has the following disadvantages: the price of the double-layer board is higher than that of the single-layer board, the DC to DC converter BD cost of the dedicated driver IC design is expensive, and the independent DC to DC converter BD or back doll is relatively complicated in the assembly process , the power consumption ...

Claims

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Application Information

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IPC IPC(8): H05B37/02H02M7/12
Inventor 林仲民翁超群
Owner TPV ELECTRONICS (FUJIAN) CO LTD
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