《XL3001降压LED恒流驱动器芯片.doc》由会员分享，可在线阅读，更多相关《XL3001降压LED恒流驱动器芯片.doc（7页珍藏版）》请在三一文库上搜索。
1、1.5A 380KHz 32V Buck LED Constant Current Driver XL3002Featuresn Wide 5V to 32V Input Voltage Range n Output Current Sense Voltage is 0.24V n Minimum Drop Out 0.3Vn Fixed 380KHz Switching Frequency n 1.5A Constant Output Current Capability n Internal Optimize Power MOSFET n Excellent line and load r
2、egulation n High efficiency up to 96%n TTL shutdown capabilityn EN pin with hysteresis functionn Built in thermal shutdown function n Built in current limit functionn SOIC-8 packageApplicationsn MR16 LED Lampn LED Lighting General DescriptionThe XL3002 is a 380 KHz fixed frequency PWM buck (step-dow
3、n 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.The PWM control ci
4、rcuit 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欢迎咨询 :136868154521.5A 380KHz 32V Buck LED Constant C
5、urrent DriverXL3002Pin ConfigurationsFigure2. Pin Configuration of XL3002 (Top ViewTable 1 Pin Description Pin NumberPin NameDescription1 CSOutput constant current sense Pin (CS. The CS referencevoltage is 0.24V.2 ENEnable Pin. Drive EN pin low to turn off the device, drive ithigh to turn it on.3 NC
6、 No connected.4 VINSupply Voltage Input Pin. XL3002 operates from a 5V to 32VDC voltage.5,6 SWPower Switch Output Pin (SW. Output is the switch node thatsupplies power to the output.7,8GND Ground Pin.Function BlockFigure3. Function Block Diagram of XL3002欢迎咨询 :136868154521.5A 380KHz 32V Buck LED Con
7、stant Current Driver XL3002Typical Application Circuit (MR16 LED LampFigure4. XL3002 Typical Application Circuit (MR16 LED Lamp Figure5. XL3002 Typical Application Circuit Efficiency1.5A 380KHz 32V Buck LED Constant Current DriverXL3002 Figure6. XL3002 Efficiency VS Load current & Input voltage1
8、.5A 380KHz 32V Buck LED Constant Current Driver XL3002Ordering InformationOrder Information Marking ID Package Type Packing Type Supplied As XL3002E1 XL3002E1 SOIC-8 2500 Units on Tape & ReelAbsolute Maximum Ratings(Note1Parameter Symbol Value Unit Input Voltage Vin -0.3 to 36 V CS Pin Voltage V
9、 CS -0.3 to Vin V EN Pin Voltage VEN -0.3 to Vin V SW Pin Voltage V SW -0.3 to Vin V Power Dissipation P D Internally limited mW Thermal Resistance(Junction to Ambient, No Heatsink, Free AirR JA 100 oC/W Operating Junction Temperature T J -40 to 125 Co Storage Temperature T STG -65 to 150 Co Lead Te
10、mperature (Soldering, 10 sec T LEAD 260 Co ESD (HBM 3000 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 opera
11、tion is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver XL3002 Electrical Characteristics Ta = 25;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max.
12、Unit 欢迎咨询： 13686815452 XL3002 System parameters test circuit figure4 VCS Current Sense Voltage Vin = 8V to 32V, Vout=5V Iload=0.3A Vin=12V ,Vout=9.6V Iout=1A 0.228 0.24 0.252 V Efficiency ? - 96 - % Electrical Characteristics (DC Parameters Vin = 12V, GND=0V, Vin & GND parallel connect a 220uf/2
13、5V capacitor; Iout=500mA, Ta = 25; the others floating unless otherwise specified, system parameters reference figure4. Parameters Input operation voltage Shutdown Supply Current Quiescent Supply Current Oscillator Frequency EN Pin Threshold Symbol Vin ISTBY Iq Fosc VEN High (Regulator ON Low (Regul
14、ator OFF VFB=0V ISW=1A VEN=0V VEN =2V, VFB =Vin 304 Test Condition Min. 5 60 2.5 380 1.7 1.1 150 250 Typ. Max. 32 200 5 456 Unit V uA mA KHz V Output Power PMOS RDS(ON mohm 6Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver 欢迎咨询： 13686815452 XL3002 Schottky Diode Selection Table
15、 Current Surface ThroughVR (The same as system maximum input voltage Mount Hole 20V 30V 40V 50V1N5817 1N5818 1N5819 3A SR302 SS12 1N5820 MBR320 SK32 SS131N5821 MBR330 SK33 30WQ03 31DQ03 SR303 SS14 1N5822 MBR340 MBR350SK34 31DQ04 SR304 SK35 31DQ05 SR305 SR306 30WQ04 30WQ05 MBR360 SK36 SS15 60V SS16 1A 7Preliminary Datasheet 1.5A 380KHz 32V Buck LED Constant Current Driver Package Information SOP8 Package Mechanical Dimensions XL3002欢迎咨询： 13686815452 8