Infineon ILD4001 高效5W LED驱动方案

Infineon公司的ILD4001是用来驱动大功率LED室内外照明的滞后的降压LED控制器，其内部的推挽输出级能驱动外接N沟MOSFET功率晶体管，LED的电流在350mA到3A,效率高达98%。控制器输入电压4.5V-42V，开关频率高达500kHz，模拟和PWM调光，输出电流精度3%，LED电流的温度漂移非常低，主要用于LED室内外照明，建筑物照明和MR16等LED替代灯以及家用电器等。本文介绍了ILD4001主要特性，方框图，典型应用电路图以及评估板主要指标，电路图和材料清单。

The ILD4001 is a hysteretic buck LED controller IC for driving high power LEDs in indoor and outdoor lighting applications.

The LED controller is capable of driving an external MOSFET power transistor with the internal push-pull output stage to achieve LED currents of 350 mA up to 3 A and more depending on the dimensioning of the MOSFET, the thermal budget of the circuit board and the current sense resistor.

The ILD4001 is widely suitable for LED applications with supply voltages up to 42 V. A multifunctional enable pin allows dimming of the LEDs with DC voltage or a PWM signal. Furthermore the enable pin can be used to switch the LED controller on and off to minimize power consumption in standby.
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