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Application of AC source in LED test

2020-07-24

LED Power Driver could transfer to specific voltage and current to drive LED to light. As the LED Technology rapidly developed, requirement to LED drive power keeps improving. High efficiency, surge protection, long service life, waterproof and damp-proof have become key evaluation criterion. Thus, power modular manufacture and lighting manufacture are both pay more attention in advanced test technology and solution.

LED is energy-saving product with high requirement to electric-driving efficiency. This is essential to the structure of power source installing in lamp. As luminous efficiency is decreasing with the increasing of temperature of LED, so heat dissipation of LED is necessary. The higher efficiency of power source, the lower of its loss of power. It will reduce the heat within the lamp and slow down the increasing of temperature within the lamp. At the meanwhile, it is benefit to increasing of service life. This could be realized via the adjustment of voltage and frequency in APM AC source. Simulating the change of voltage and frequency in input terminal of LED-drive power source, it could also set output fluctuation of voltage and frequency according to different requirement. Built-in high accuracy power meter could measure voltage, current, frequency, apparent power and 15 parameters. It could completely satisfy high efficiency test requirement of LED-drive power source. What is more, LED is weak in Surge handling capability especially in anti-reverse voltage capability. Strengthen the protection in this file in equally important. Some LED lamps are installed in outdoor such as LED street lamp. Because the activation of grid load and interaction of lightning stock, there will be invasion of all kind of surge from grid system. Some surge will cause direct damage to LED. Thus, LED drives power source need capability to restrain the invasion of surge to protect LED. It will need simulation of waveform of APM AC source. It could simulate transient shutdown waveform, start or end in specific phase angle and PLD test. It also matches the wave of IEC61000-4-11/IEC61000-4-14/IEC61000-4-28 standard.

Through in-depth research to LED, APM combine own advantage, think rigorously in design. It is only for providing more intimate service to customer.

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