Electronic load of a semi-passive type programmable simulation LED characteristic

Abstract

The invention relates to an electronic load of a semi-passive type programmable simulation LED characteristic. The electronic load comprises an embedded control module, a basic power circuit module, and an LED characteristic simulation circuit module. The LED characteristic simulation circuit module comprises an LED positive volt-ampere characteristic waveform sampling circuit, a high frequency and low frequency alternating current LED volt-ampere characteristic separating circuit, a high frequency variable gain amplification circuit, a low frequency variable gain amplification circuit and a high speed linear drive circuit; the basic power circuit module comprises a high speed power circuit, a high speed low impedance power supply circuit and a read-back sampling circuit. Through adding the LED characteristic simulation circuit module, the embedded control module and a basic power circuit, the electronic load not only can satisfy a test requirement of a common load power supply, but also can simulate a work characteristic of a real LED load, thus tests of all LED driving power supplies and the like are satisfied, and a more accurate and reliable test result is obtained.

Description

Technical field: [0001] The invention belongs to the field of electronic loads, in particular to a semi-passive programmable electronic load for simulating LED characteristics. Background technique: [0002] In the field of power supply testing, electronic loads are needed to simulate the power consumption of electrical appliances in the real environment through electronic loads, and cooperate with the control and display of PCs to test the corresponding power supplies to obtain test results. [0003] Existing electronic loads mainly have five working modes: CR, CC, CV, CP, and pulse in the power supply test. In the current test of LED drive power supply, the electronic loads used are designed according to the characteristics of ordinary electronic loads. These electronic loads are not specially designed according to the characteristics of LED itself, so these electronic loads have basically no working characteristics in the test. Simulate the working characteristics of the...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the defect that the existing electronic load cannot simulate the working characteristics of real LED loads, and provide a semi-passive programmable electronic load that simulates the characteristics of LEDs

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