波纹电压

       LED靠电流激发芯片促使荧光粉而放光的，其电压是一个被动值。衡量LED的参数，是以电流为主动参数，电压为被动参数。而LED用在照明领域，对亮度要求极高，所以说对电流的精度也极高。下面探讨纹波电压对LED的伤害到底有多大。

& nbsp; & nbsp; & nbsp; & nbsp; LED is a passive value when the fluorescent powder is lighted by a current-induced chip. The parameters for measuring LED are the active parameter for electricity and the passive parameter for voltage. LED is used in the lighting field to be extremely bright, so the accuracy of the current is very high.

　　按照大多数客户所用参数12并12串，都会给到18毫安~20毫安那么这个电压范围就很窄，基本在3.1V~3.2V。按照理论上20毫安，3.2V来计算的话，12并12串是38.4V ，240毫安。假设现在的纹波是5%，浮动电压最大为1.92V， 单颗LED增加了 0.16V  即单颗LED为3.36V 电流24毫安，10%为3.52V 电流为25毫安，20%为3.84V 电流大于45毫安。

Based on the parameters 12 and 12 used by most clients, the voltage range is 18 mA ~ 20 mA, which is essentially at 3.1V ~ 3.2V. In theory 20 mA, 3.2V, 12 and 12 are 38.4 V, 240 mA. Assuming the current twirl is 5%, the floating voltage is up to 1.92 V, and the single LED increases 0.16 V & nbsp; i.e. a single LED is 3.36 V current 24 mA, 10% 3.52 V current 25 mA, 20% current 3.84 V current more than 45 mA.

　　以上数据的电流用普通仪器是没办法检测到的，而LED是完全可以“感受”到。如此高频的电压、电流变化体现在哪里呢？答案就是LED产生了额外的热量！

The electric current of the above data is not detectable by ordinary instruments, and the LED is perfectly capable of feeling it. Where are the high-frequency voltage and current changes? The answer is that LED produces extra heat!

　　可用同一组LED负载，不同输出纹波电压的电源来测试，LED的温度都是不一样的。另外，有时LED灯刚装好，点着点着就发现有LED死掉了，这些有很多都是纹波电压太高造成的。

It can be tested with the same set of LED loads, with different power sources for the output spinal voltage, and the temperature of LEDs is different. And sometimes LED lamps are installed, and LEDs die when they are lit, many of which are caused by the high spinal voltage.

　　使用波纹电压时对LED所造成的危害：

Hazard to LED when using vortex voltage:

　　1、产生高温，降低LED寿命。

1. Generate high temperatures and reduce LED life expectancy.

　　2、产生过大的高频电流冲击，短时间内使LED失效。直接影响LED的寿命。

2. The lifetime of the LED is directly affected by excessive high-frequency current shocks, which render LED ineffective in a short period of time.

　　另外说一点的就是对于无电解电容的驱动电源来说，瓶颈就是纹波，如果纹波不处理在5%以下，无电解电容在LED照明领域永远是一个梦。

In addition, for power-driven sources without electrolysis, the bottleneck is the spinal wave, which is always a dream in the LED lighting field if it is not treated at less than 5 per cent.