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A led drive control circuit

A technology of LED drive and control circuit, which is applied in the direction of electric lamp circuit layout, electric light source, lighting device, etc. It can solve the problem of LED lighting drive that has not been seen yet, and achieve the effect of reducing switching loss and reducing complexity

Active Publication Date: 2015-09-09
苏州逻辑云科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is mainly used for LED driving power supply, and adopts the LED driving control circuit designed by the chip PLC810PG. So far, there has been no report of using this technology for LED lighting driving

Method used

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  • A led drive control circuit
  • A led drive control circuit
  • A led drive control circuit

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0021] figure 1 The structure block diagram of the LED drive control circuit of the present invention is provided, as figure 1 As shown, the LED drive circuit mainly includes an input circuit, a PFC control circuit, a control chip, an LLC control circuit, an output circuit, and a control chip PLC810PG.

[0022] figure 2 Provided is the IC power supply circuit and startup circuit of the present invention, such as figure 2 As shown, an IC power supply circuit is formed by adding a bias winding to the boost inductor, and a voltage doubler circuit is formed by diodes D1, D2, capacitors C1, C2, and resistor R1 to rectify and filter it to form a relatively independent bias voltage. Components triode Q1, Q2, Q3, voltage regulator tubes D3, D4, D6, diode D5, capacitor C3, resistors R2, R3, R5, R6 form a bias v...

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PUM

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Abstract

The invention discloses a light-emitting diode (LED) driving control circuit which mainly comprises a power factor correction (PFC) control circuit, a logical link control (LLC) circuit and a control chip. The PFC control circuit comprises an integrated circuit (IC) power supply circuit, a starting circuit, a PFC metal-oxide-semiconductor field effect transistor (MOSFET) driving circuit, a voltage detection circuit and a compensation circuit. A programmable logic controller (PLC) 810PG chip is adopted as the control chip. A half-bridge resonant topology structure is adopted for the LLC circuit. The LED driving control circuit is used for improving the working efficiency, the working efficiency of the LED driving control circuit can reach 90.5%, the power factor of the LED driving control circuit is larger than 0.98, and switching loss is reduced.

Description

technical field [0001] The invention belongs to the technical field of switching power supplies and can be used in LED drive control circuits to improve the working efficiency of the LED drive power supply, increase the power factor and reduce switching loss. Background technique [0002] On November 4, 2011, the country officially released the road map for the elimination of incandescent lamps. This brings great development space and market prospects to the next generation of LED lighting sources. At present, LEDs are all driven by DC, so they cannot be directly driven by AC mains, and a power conversion adapter, that is, LED drive power, needs to be added between the two. Its function is to convert AC mains power into DC power that can be used by LEDs. [0003] In LED lighting applications using DC-DC power supplies, LED drive methods include resistive, linear regulators, and switching regulators. In the resistive driving method, the forward current of the LED can be co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 赵文静张晓菲
Owner 苏州逻辑云科技有限公司