电平转换器有助于并行LED电流驱动器

摘要：使用一对匹配晶体管的高边电流检测信号转换到地面参考，该电路允许你并行的要求，以实现所需的驱动电流LED驱动电路。

Maxim > App Notes > Display Drivers LED Lighting
Keywords: white LEDs, LED drivers, matched transistor pair, high-side current sensing Dec 08, 2010

APPLICATION NOTE 4537
Level Shifter Helps to Parallel LED Current Drivers


Abstract:Using a pair of matched transistors to translate a high-side current-sense signal down to a ground reference, this circuit
lets you parallel LED-driver circuits as required to achieve the desired drive current.

A similar version of this article appeared in the February 19, 2008 issue of Machine Design magazine.

As white LEDs become more pervasive, the industry provides more options for driving them. Linear constant-current drivers, for
instance, offer low EMI, low cost, and require only a few compo