XL3002 PDF规格书.pdf
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1、 Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Rev 2.3 1 Features n Wide 5V to 32V Input Voltage Range n Output Current Sense Voltage is 0.24V n Minimum Drop Out 0.3V n Fixed 380KHz Switching Frequency n 1.5A Constant Output Current Capability n Internal Optimize Powe
2、r MOSFET n Excellent line and load regulation n High efficiency up to 96%n TTL shutdown capability n EN pin with hysteresis function n Built in thermal shutdown function n Built in current limit function n SOIC-8 package Applications n MR16 LED Lamp n LED Lighting General Description The XL3002 is a
3、 380 KHz fixed frequency PWM buck(step-down)DC/DC converter,capable of driving a 1.5A load with high efficiency,low ripple and excellent line and load regulation.Requiring a minimum number of external components,the regulator is simple to use and include internal frequency compensation and a fixed-f
4、requency oscillator.The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%.An enable function,an over current protection function is built inside.An internal compensation block is built in to minimize external component count.Figure1.Package Type of XL3002 技术索样QQ:1378271156
5、 Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Rev 2.3 2 Pin Configurations Figure2.Pin Configuration of XL3002(Top View)Table 1 Pin Description Pin Number Pin Name Description 1 CS Output constant current sense Pin(CS).The CS reference voltage is 0.24V.2 EN Enable Pi
6、n.Drive EN pin low to turn off the device,drive it high to turn it on.3 NC No connected.4 VIN Supply Voltage Input Pin.XL3002 operates from a 5V to 32V DC voltage.5,6 SW Power Switch Output Pin(SW).Output is the switch node that supplies power to the output.7,8 GND Ground Pin.Function Block Figure3.
7、Function Block Diagram of XL3002 Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Rev 2.3 3 Typical Application Circuit(MR16 LED Lamp)Figure4.XL3002 Typical Application Circuit(MR16 LED Lamp)Figure5.XL3002 Typical Application Circuit Efficiency Preliminary Datasheet 1.5A
8、 380KHz 32V Buck LED Constant Current Driver XL3002 Rev 2.3 4 Figure6.XL3002 Efficiency VS Load current&Input voltage Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Rev 2.3 5 Ordering Information Order Information Marking ID Package Type Packing Type Supplied As XL3002
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