安森美LED驱动方案

发布时间：2012-11-18 00:38 发布者：1770309616

LED在光输出、能效及成本方面得到了全面改善，同时具备了小巧、低压工作及环保等众多优势，应用范围也在不断拓宽。未来，LED照明在通用照明、LCD背光、汽车照明等领域的增长前景尤为可观。安森美半导体提供丰富的LED驱动器产品，可满足各种LED照明应用需求。

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 　

主要应用：

_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.

方案原理图：