安森美LED驅動方案

關鍵詞： 安森美 , LED驅動

LED在光輸出、能效及成本方面得到了全面改善，同時具備了小巧、低壓工作及環(huán)保等眾多優(yōu)勢，應用范圍也在不斷拓寬。未來，LED照明在通用照明、LCD背光、汽車照明等領域的增長前景尤為可觀。安森美半導體提供豐富的LED驅動器產(chǎn)品，可滿足各種LED照明應用需求。

主要特性：

_Integrated 1.5 A Switch 　

_Input Voltage Range from 3.0 V to 40 V 　

_Low Feedback Voltage of 235 m 　V

_Cycle 　-by-Cycle Current Limit

_No Control Loop Compensation Required 　

_Frequency of Operation Adjustable up to 250 kHz 　

_Operation with All Ceramic Output Capacitors or No Output Capacitance 　

_Analog and Digital PWM Dimming Capability 　

_Internal Therma 　l Shutdown with Hysteresis

_Automotive Version Available 　

主要應用：

_Automotive and Marine Lighting 　

_High Power LED Driver 　

_Constant Current Source 　

_Low Voltage LED Lighting 　

方案特性：

LEDs are replacing traditional incandescent and halogen lighting sources in architectural, industrial, residential and the transportation lighting. The key challenge in powering LED’s is providing a constant current source. The  evaluation board for the NCP3065/NCV3065 can be easily configured for a variety of constant current buck and boost

LED driver applications.
  
It describes a DC−DC converter circuits that can easily be configured to drive LEDs at several different output currents and can be configured for either AC or DC input. The NCP3065/NCV3065 can be configured in a several driver topologies to a drive string of LEDs: be it traditional low power LEDs or high brightness high power LEDs such as the Lumileds Luxeonâ K2 and Rebel series, the CREE XLAMPâ 4550 or XR series, the OSRAM OSTARâ, TopLEDâ and Golden Dragonâ.

方案原理圖：
  

2012-11-20 12:25:39 上傳

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2012-11-20 12:29:48 上傳