XL4101

Datasheet 3A 150kHz 40V Buck Li Battery Charger XL4101 Features General Description n n n n n n n n n n n n The XL4101 is a 150KHz fixed frequency PWM buck (step-down) DC/DC converter, capable of driving a 3A 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 4.5V to 40V Input Voltage Range Output Adjustable from 1.235V to 37V Minimum Drop Out 1.5V Fixed 150kHz Switching Frequency 3A Constant Output Current Capability Internal Optimize Power Transistor Excellent line and load regulation With output constant current loop Built in thermal shutdown function Built in current limit function Built in output over voltage protection TO263-5L package The PWM control circuit is able to adjust the duty ratio linearly from 0 to 100%. An over current protection function is built inside. An internal compensation block is built in to minimize external component count. Applications n n Car Charger Battery Charger Figure1. Package Type of XL4101 Rev 1.2 www.xlsemi.com 1 Datasheet 3A 150kHz 40V Buck Li Battery Charger XL4101 Pin Configurations Figure2. Pin Configuration of XL4101 (Top View) Table 1 Pin Description Pin Number Pin Name 1 VIN 2 SW 3 GND 4 FB 5 CS Description Supply Voltage Input Pin. XL4101 operates from a 4.5V to 40V DC voltage. Bypass Vin to GND with a suitably large capacitor to eliminate noise on the input. Power Switch Output Pin (SW). Output is the switch node that supplies power to the output. Ground Pin.(Note: Connected the back exposed PAD to Pin3.) Feedback Pin (FB). Through an external resistor divider network, Feedback senses the output voltage and regulates it. The feedback threshold voltage is 1.235V. Output Current Sense Pin; (Iload=0.155V/Rcs) Rev 1.2 www.xlsemi.com 2 Datasheet 3A 150kHz 40V Buck Li Battery Charger XL4101 Function Block Figure3. Function Block Diagram of XL4101 Typical Application Circuit (Car Charger) Figure4. XL4101 Typical Application Circuit (Li Battery Charger) Rev 1.2 www.xlsemi.com 3 Datasheet 3A 150kHz 40V Buck Li Battery Charger XL4101 Typical Application Circuit (Buck LED Constant Current Driver) Figure5. XL4101 Typical Application Circuit (LED Constant Current Driver) Ordering Information Order Information XL4101E1 Marking ID XL4101E1 Package Type TO263-5L Packing Type Supplied As 800 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 Value -0.3 to 45 -0.3 to Vin -0.3 to Vin Internally limited Unit V V V mW Input Voltage Vin FB Pin Voltage VFB SW Pin Voltage VSW Power Dissipation PD Thermal Resistance 30 ºC/W RJA (Junction to Ambient, No Heatsink, Free Air) Operating Junction Temperature -40 to 125 ºC TJ Storage Temperature -65 to 150 ºC TSTG Lead Temperature (Soldering, 10 sec) 260 ºC TLEAD ESD (HBM) 2000 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 1.2 www.xlsemi.com 4 Datasheet 3A 150kHz 40V Buck Li Battery Charger XL4101 XL4101 Electrical Characteristics Ta = 25℃;unless otherwise specified. Symbol Parameter Test Condition Min. Typ. Max. Unit System parameters test circuit figure4 Feedback Voltage VFB ŋ Efficiency Vin = 8V to 32V, Vout=5V Iload=0.2A to 3A Vin=12V ,Vout=5V Iout=3A 1.198 1.235 1.272 - 80 V - % Electrical Characteristics (DC Parameters) Vin = 12V, GND=0V, Vin & GND parallel connect a 220uf/50V capacitor; Iout=500mA, Ta = 25℃; the others floating unless otherwise specified. Parameters Symbol Input operation voltage Quiescent Supply Current Test Condition Min. Vin Iq Typ. Max. Unit 40 V 2 5 mA 150 172 Khz 4.5 VFB =Vin Oscillator Frequency Fosc Switch Current Limit IL VFB =0 3.6 Output Saturation Voltage VCE VFB=0V ISW=2A 1.1 Constant Voltage VCS current sense 127 A 1.4 0.140 0.155 0.170 V V 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 √ 60V √ 1N5820 1N5821 1N5822 √ MBR320 MBR330 MBR340 MBR350 MBR360 SK32 SK33 SK34 SK36 30WQ03 30WQ04 30WQ05 31DQ03 31DQ04 31DQ05 SR303 SR304 SR305 √ √ √ √ SR302 Rev 1.2 SK35 SR306 www.xlsemi.com 5 Datasheet 3A 150kHz 40V Buck Li Battery Charger XL4101 Package Information TO263-5L Rev 1.2 www.xlsemi.com 6