联系人：曹中立 电话：１３４２８７０６２２３ ＱＱ：１１５７００８１１５ 1.5A 380KHz 32V Buck LED Constant Current Driver Datasheet XL3002 Features General Description n n n n n n n n n n n n n The XL3002 is a 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-frequency oscillator. Wide 5V to 32V Input Voltage Range Output Current Sense Voltage is 0.24V Minimum Drop Out 0.3V Fixed 380KHz Switching Frequency 1.5A Constant Output Current Capability Internal Optimize Power MOSFET Excellent line and load regulation High efficiency up to 96% TTL shutdown capability EN pin with hysteresis function Built in thermal shutdown function Built in current limit function SOIC-8 package 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. Applications n n MR16 LED Lamp LED Lighting Figure1. Package Type of XL3002 Rev 2.4 www.xlsemi.com 1 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Pin Configurations Figure2. Pin Configuration of XL3002 (Top View) Table 1 Pin Description Pin Number Pin Name 1 CS 2 EN 3 NC 4 VIN 5,6 SW 7,8 GND Description Output constant current sense Pin (CS). The CS reference voltage is 0.24V. Enable Pin. Drive EN pin low to turn off the device, drive it high to turn it on. No connected. Supply Voltage Input Pin. XL3002 operates from a 5V to 32V DC voltage. Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. Ground Pin. Function Block Figure3. Function Block Diagram of XL3002 Rev 2.4 www.xlsemi.com 2 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Typical Application Circuit (MR16 LED Lamp) Figure4. XL3002 Typical Application Circuit (MR16 LED Lamp) Figure5. XL3002 Typical Application Circuit Efficiency Rev 2.4 www.xlsemi.com 3 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Figure6. XL3002 Efficiency VS Load current & Input voltage Rev 2.4 www.xlsemi.com 4 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Ordering Information Order Information XL3002E1 Marking ID XL3002E1 Package Type SOIC-8 Packing Type Supplied As 2500 Units on Tape & Reel XLSEMI Pb-free products, as designated with “E1” suffix in the par number, are RoHS compliant. Absolute Maximum Ratings（Note1） Parameter Symbol Vin VCS VEN VSW PD Value -0.3 to 36 -0.3 to Vin -0.3 to Vin -0.3 to Vin Internally limited Unit V V V V mW Input Voltage CS Pin Voltage EN Pin Voltage SW Pin Voltage Power Dissipation Thermal Resistance (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature Storage Temperature Lead Temperature (Soldering, 10 sec) ESD (HBM) RJA 100 ºC/W TJ TSTG TLEAD -40 to 125 -65 to 150 260 3000 ºC ºC ºC V Note1: Stresses greater than those listed under Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operation is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. Rev 2.4 www.xlsemi.com 5 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 XL3002 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure4 VCS Current Sense Voltage Vin = 8V to 32V, Vout=5V Iload=0.3A 0.228 0.24 0.252 V ŋ Vin=12V ,Vout=9.6V Iout=1A - 96 - % Efficiency Electrical Characteristics (DC Parameters) Vin = 12V, GND=0V, Vin & GND parallel connect a 220uf/25V capacitor; Iout=500mA, Ta = 25℃; the others floating unless otherwise specified, system parameters reference figure4. Parameters Input operation voltage Symbol Test Condition Vin Min. Typ. 5 Max. Unit 32 V Shutdown Supply Current ISTBY VEN=0V 60 200 uA Quiescent Supply Current Iq VEN =2V, VFB =Vin 2.5 5 mA 380 456 KHz Oscillator Frequency Fosc EN Pin Threshold VEN Output Power PMOS RDS(ON) 304 High (Regulator ON) Low (Regulator OFF) VFB=0V ISW=1A Rev 2.4 1.7 1.1 150 V 250 mohm www.xlsemi.com 6 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Schottky Diode Selection Table Current 1A 3A Surface Through VR (The same as system maximum input voltage) Mount Hole 20V 30V 40V 50V 1N5817 1N5818 1N5819 √ SS12 SS13 SS14 √ 1N5820 1N5821 1N5822 √ MBR320 MBR330 MBR340 MBR350 MBR360 SK32 SK33 SK34 SK36 30WQ03 30WQ04 30WQ05 31DQ03 31DQ04 31DQ05 SR303 SR304 SR305 √ √ √ √ √ SR302 Rev 2.4 SS15 60V SK35 SS16 SR306 www.xlsemi.com 7 Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Package Information SOP8 Package Mechanical Dimensions Rev 2.4 www.xlsemi.com 8