Sinrace Power Supply Technology (Shenzhen) Co., Ltd.

1. Develope a series of constnat voltage constant current control electronic circuit accoring to the LED characteristics.the use of integrated circuit technology to control the input current of each LED in the best value, making the current of LED stable, and produce the highest output of luminous flux. It will be better that LED driver circuit can control the current of LED when the input voltage, ambient temperature and other factors are changing.

Diode is a most important component in power supplies and it is easy to break. Diode reverse the deadline, can withstand a certain value of reverse voltage, then the maximum allowable reverse voltage is the rated voltage. For example 5A/100V diode, rated reverse voltage is 100V.

In the first half year of 2011, the price of high-power LED lighting products as well as led drivers decrease of 10-20%. Exploring the reasons of  LED lighting products price appear in the decline this year, it relates the demand of as expected LEDTV in 2011 not as expected. Due to the reduced orders of LED backlighting, LED industry take direction to the home lighting area. In the case of oversupply, the prices of LED lighting and led drivers decline rapidly.

对于现在一个电子系统来说，电源部分的设计也越来越重要，我想通过和大家探讨一些自己关于电源设计的心得，来个抛砖引玉，让我们在电源设计方面能够都有所深入和长进。

近日，市场传台湾行政院将通过“经济景气因应方案”，推动各县市全面换装32万盏LED路灯，除了直接受惠的台湾LED厂商外，布局LED灯已久的电源厂台达电、康舒等也可望同步受惠。

A TRIAC dimmable led driver was worked out, which with 15W output build in PFC.

The specification as below:
Input: 100-240VAC 50 /60Hz
Output: 17-24vdc 650mA
Dimmable by TRIAC dimmer
Power factor:>0.9
Efficiency:> 80%
Long life: >50,000h