原标题：Infineon ILD4001 7W MR16 LED灯驱动方案

　　infineon公司的ILD4001是用来驱动室内和户外大功率LED的滞后降压LED控制器,可驱动外接MOSFET功率晶体管,LED驱动电流可达350mA到3A,电源电压高达42V,采用DC电压或PWM信号进行调光.本文介绍了ILD4001主要特性,框图和应用框图,以及7W/10WMR16 LED灯驱动板主要特性,电路图,材料清单和PCB设计图.

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

　　The LED controller is capable of driving an external MOSFET power transistor with the internal push-pull outputstage to achieve LED currents of 350 mA up to 3 A and more depending on the dimensioning of the MOSFET, thethermal 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 pinallows dimming of the LEDs with DC voltage or a PWM signal. Furthermore the enable pin can be used to switchthe LED controller on and off to minimize power consumption in standby.

　　The ILD4001 incorporates an integrated thermal shutdown function pulling low the Vdrive output signal once thejunction temperature exceeds the threshold temperature. Once the junction temperature drops below thethreshold temperature the Vdrive output is activated again.

　　To provide maximum design flexibility, the ILD4001 is housed in a small SC-74 package.

　　ILD4001主要特性:

　　• Wide input voltage range: 4.5 V ... 42 V

　　• Capable to drive N-channel MOSFETs that provide up to 3 A outputcurrent and up to 98% efficiency

　　• Temperature shut down mechanism

　　• Switching frequency up to 500 kHz

　　• Analog and PWM dimming possible

　　• Typical 3 % output current accuracy

　　• Very low LED current drift over temperature

　　• Minimum external component required

　　• Small package: SC-74

　　ILD4001应用:

　　• LED controller for indoor and outdoor illumination

　　• LED replacement lamps, e.g. MR16 halogen replacement

　　• Retail, office and residential high power luminaires

　　• Architectural lighting

　　• Downlights and light engines

　　• Appliances, e.g. fridge / freezer

　　This document contains the information about the demo board with the device ILD4001 LED driver which is suitable for the use in an MR16 lamp.

　　ILD4001 is a hysteretic buck LED controller IC for industrial applications.

　　The demo board has two input connections to be powered up by 12 VAC from electronic transformer, and two output connections to the LED. The boards are preset to deliver 7 W or 10 W powers into the LED load.

　　These MR16 boards are suitable and tested to drive 2 LEDs in series and 4 LEDs (2 LEDs in series and 2 in parallel). For 4 LEDs design, it is recommended to use the LED with the same forward voltage to ensure the current matching for the LEDs in parallel.

　　MR16 LED灯驱动板主要特性:

　　 Deliver 7 W / 10 W power 

　　 Temperature shut down mechanism 

　　 Compatible with electronic transformer 

　　 Low LED current drift over temperature 

　　 Integrated push-pull stage for fast on/off switching 

　　 Minimum external component required 

　　 Small package: SC-74 

　　图.7W驱动板外形图

　　图. 10W驱动板外形图

　　7/10W驱动板材料清单: