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Capacitance buck-type LED driver and capacitance buck-type LED driving method thereof

A LED driver and capacitor step-down technology, applied in the electronic field, can solve problems such as low life, low efficiency, and poor stability, and achieve the effects of improving service life, reducing power consumption, and realizing precise control

Active Publication Date: 2013-12-11
SILERGY SEMICON TECH (HANGZHOU) CO LTD
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  • Abstract
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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 driving method to solve the problems of poor stability, low life and low efficiency of the capacitive step-down LED driver in the prior art.

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  • Capacitance buck-type LED driver and capacitance buck-type LED driving method thereof
  • Capacitance buck-type LED driver and capacitance buck-type LED driving method thereof
  • Capacitance buck-type LED driver and capacitance buck-type LED driving method thereof

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Embodiment Construction

[0040] 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 schemes made on the spirit and scope of the present invention. In order to provide the public with a thorough understanding of the present invention, specific details are set forth in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details.

[0041] refer to figure 2 , shows a functional 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. exist figure 1 On the basis of the capacitive step-down LED driver shown in the pri...

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Abstract

The invention relates to a capacitance buck-type LED driver and a capacitance buck-type LED driving method thereof. The capacitance buck-type LED driver comprises a control circuit and a switch circuit, wherein the control circuit controls an on-off state of the switch circuit according to output current and the output voltage of the capacitance buck-type LED driver so as to control values of energy transferred from the input side to the output side. In a first working state, the switch circuit controls the input side not to transfer the energy to the output side; and in a second working state, the switch circuit controls the input side to transfer the energy to the output side so as to the keep output current and expected driving current to be 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02H05B44/00
CPCH05B45/375
Inventor 陈伟
Owner SILERGY SEMICON TECH (HANGZHOU) CO LTD
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