A low-power led test device and its multi-channel constant current output circuit

A constant-current output, low-power technology, applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of expensive testing equipment, low current precision, and high cost, and achieve multi-channel current constant current value optional, Inexpensive and simple structure

Inactive Publication Date: 2016-12-28
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is firstly to provide a multi-channel constant current output circuit for low-power LED testing, aiming to solve the technical problems of low current precision, expensive testing equipment and high cost in current low-power LED testing

Method used

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  • A low-power led test device and its multi-channel constant current output circuit
  • A low-power led test device and its multi-channel constant current output circuit

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Embodiment Construction

[0014] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0015] The multi-channel constant-current output circuit for low-power LED testing provided by the invention is applicable to the testing of conventional ordinary LEDs and piranha LEDs, has a simple structure, and multi-channel constant-current values ​​are optional, safe, reliable, and cheap.

[0016] figure 1 It is a structural block diagram of the multi-channel constant current output circuit for low-power LED testing provided by the embodiment of the present invention; for the convenience of description, only the parts related to this embodiment are shown, as shown in the figure:

[0017] A mu...

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Abstract

The invention belongs to the field of test circuits, in particular to a low-power LED test device and a multi-channel constant current output circuit thereof. The multi-channel constant current output circuit for low-power LED testing provided by the present invention includes: a power supply circuit unit connected to an external DC power plug; Constant current chip with multiple output sockets. Its circuit structure is simple, and it can be applied to the test of conventional ordinary LEDs and piranha LEDs; and through the selection of different constant current chips, it can realize the optional constant current value of multiple channels, safe and reliable performance, and low price.

Description

technical field [0001] The invention belongs to the field of test circuits, in particular to a low-power LED test device and a multi-channel constant current output circuit thereof. Background technique [0002] With the development of the lighting industry, the application of LEDs in various fields has been basically popularized. For lighting manufacturers, it is an essential link to test the photoelectric parameters and performance of the LED itself. However, in the process of testing the photoelectric parameters and performance of the LED itself, there are mainly problems: the mA gear of the conventional regulated power supply is not accurate enough, and the current fluctuation range of the small current gear of this type of power supply is large, which will affect Test the accuracy of photoelectric parameters; if you purchase a power supply with precise current gears, the price of the test power supply itself is very expensive. A simple high-precision low-power LED tes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/26G01R1/28
Inventor 周明杰陈钢
Owner OCEANKING DONGGUAN LIGHTING TECH
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