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发布者:来自网络 发布时间:2013-12-24 阅读:2918次    关键字: LED
FP7176-Average-Mode Constant LED Driver


FP7176-LED Driver with Average-Mode Constant Current Control DataSheet
 
General Description
    The FP7176 is an average current mode control LED driver IC operating in a constant off-time mode. FP7176 does not produce a peak-to-average error, and therefore greatly improves accuracy, line and load regulation of the LED current without any need for loop compensation or high-side current sensing. The output LED current accuracy is ±2%.
    The FP7176 can be powered from an 8.0 - 450V supply. A PWM dimming input is provided that accepts an external control TTL compatible signal. The output current can be programmed by an internal 277mV reference, or controlled externally through a 0 - 1.5V dimming input.
Features
 Fast average current control
 Internal 8 to 450V linear regulator
 Programmable constant off-time switching
 Linear and PWM dimming capability
 Output short circuit protection with skip mode
 Requires few external components for operation

Applications
 DC/DC or AC/DC LED driver applications
 LED street lighting
 Back lighting of flat panel displays
 General purpose constant current source
 Signage and decorative LED lighting
 Chargers
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