Capacitance buck type light emitting diode (LED) driver and capacitance buck type LED driving method

An LED driver and LED driving technology, applied in the electronic field, can solve problems such as poor stability, low efficiency, and low lifespan, and achieve the effects of reducing power consumption, improving lifespan, and realizing precise control

Inactive Publication Date: 2013-06-12
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0005] In view of this, the purpose of the present invention is to provide a novel capacitive step-down LED driver and capacitive step-down

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  • Capacitance buck type light emitting diode (LED) driver and capacitance buck type LED driving method
  • Capacitance buck type light emitting diode (LED) driver and capacitance buck type LED driving method
  • Capacitance buck type light emitting diode (LED) driver and capacitance buck type LED driving method

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[0058] Several preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. The present invention covers any alternatives, modifications, equivalent methods and solutions made on the essence and scope of the present invention. In order for the public to have a thorough understanding of the present invention, specific details are described in the following preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0059] reference figure 2 , Shown is the principle block diagram of the capacitive step-down LED driver according to the first embodiment of the present invention. In this embodiment, the capacitive step-down LED driver 200 is used to drive a load LED lamp. in figure 1 Based on the capacitive step-down LED driver shown in the prior art, the...

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Abstract

The invention relates to a capacitance buck type light emitting diode (LED) driver and a capacitance buck type LED driving method. The capacitance buck type LED driver comprises a control circuit and a switching circuit, wherein the control circuit controls a switching state of the switching circuit according to output current and the output voltage of the capacitance buck type LED driver so as to control energy transferred from an input side to an output side; in a first working state, the switching circuit controls the input side not to transfer the energy to the output side; and in a second working state, the switching circuit controls the input side to transfer the energy to the output side so as to keep the output current and expected driving circuit consistent.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a capacitive step-down LED driver adopting a capacitive step-down mode and a capacitive step-down LED driving method thereof. Background technique [0002] With the wide application of LED lamps, LED drive technology is becoming more and more mature. In the prior art, there are many kinds of LED driving methods, such as PWM constant current driving method and capacitive step-down LED driving circuit. The PWM constant current driving method can well realize the constant current control of the output current, therefore, there are a large number of constant current control chips on the market. However, the cost of this driving method is very high, the control method is very complicated, and the circuit design is also very difficult. The capacitive step-down LED drive circuit is simple to control and low in cost, so it is widely used in low-power LED lighting drive circuits. ...

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Application Information

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IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/375
Inventor 陈伟
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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