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Digital control constant-current output driving conversion circuit and implementation method thereof

A technology of constant current output and drive conversion, applied in electric light sources, electrical components, electroluminescent light sources, etc., can solve the problems of inability to achieve stepless control of output current, inability to achieve high-precision and stable output control effects, etc. Simple structure, good use effect, high stability effect

Active Publication Date: 2017-06-20
HENGDIAN GRP TOSPO LIGHTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. It is impossible to realize the stepless regulation of the output current in digital mode;
[0005] 2. It is impossible to achieve high-precision and stable output regulation effect

Method used

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  • Digital control constant-current output driving conversion circuit and implementation method thereof

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Embodiment 1

[0031] Such as figure 1 As shown, a digital control constant current output drive conversion circuit includes a control voltage module, the control voltage module is connected to the G and S poles of the MOS tube, and the D and S poles of the MOS tube are connected to both ends of the sampling resistor and the constant current drive conversion The modules are connected, and the output current sampling module feeds back the result to the control voltage module. The core components of the control voltage module, constant current drive conversion module, and output current sampling module in this embodiment are all purchased from the market, and the specific models are determined according to actual needs. The core device of the control voltage module adopts TI's LM258; the core device of the constant current drive conversion module adopts MBI6661 of Taiwan Macroblock Technology; the core device of the output current sampling module adopts Allegro's ACS710.

[0032] The constant...

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Abstract

The invention discloses a digital control constant-current output driving conversion circuit. The digital control constant-current output driving conversion circuit comprises a control voltage module, wherein the control voltage module is connected with a G pole and an S pole of a metal-oxide-semiconductor (MOS) tube, a D pole and the S pole of the MOS tube are connected with two ends of a sampling resistor and a constant-current driving conversion module, and an output current sampling module is used for feeding back a result to the control voltage module. The invention also discloses an implementation method of the digital control constant-current output driving conversion circuit. The digital control constant-current output driving conversion circuit has the characteristic of simple structure, and stepless performance, high precision, high stability and the like of an AC-to-DC or DC-to-DC constant-current output driver are achieved by a digital control mode.

Description

technical field [0001] The invention relates to LED driving circuit technology, in particular to a digitally controlled constant current output driving conversion circuit and a realization method thereof. Background technique [0002] At present, the output constant current value of the current high-efficiency, constant-current output drive converter and circuit is generally controlled by changing the resistance value of the external parallel connection sampling resistor to achieve the control of the output current. At present, there are three ways to change the resistance value of the sampling resistor. One, using a fixed resistance value, this method can not change the drive output current arbitrarily in the later stage, it is necessary to manually replace the sampling resistor with different resistance value to change the output current; use the dial switch to switch the resistance value of the sampling resistance, this method can be divided into files Adjusting the outpu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00H05B45/37
Inventor 王彪叶飞朱春强朱忠有
Owner HENGDIAN GRP TOSPO LIGHTING