Datasheet
3A 150kHz 40V Buck Li Battery Charger XL4101
Rev 1.2 www.xlsemi.com
1
Features
n Wide 4.5V to 40V Input Voltage Range
n Output Adjustable from 1.235V to 37V
n Minimum Drop Out 1.5V
n Fixed 150kHz Switching Frequency
n 3A Constant Output Current Capability
n Internal Optimize Power Transistor
n Excellent line and load regulation
n With output constant current loop
n Built in thermal shutdown function
n Built in current limit function
n Built in output over voltage protection
n TO263-5L package
Applications
n Car Charger
n Battery Charger
General Description
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.
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.
Figure1. Package Type of XL4101
Administrator
附注
原厂代理商:
深圳市森利威尔电子有限公司
联系人:黄先生
手机:13760325070
QQ:2355368872
欢迎咨询,竭诚服务
Datasheet
3A 150kHz 40V Buck Li Battery Charger XL4101
Rev 1.2 www.xlsemi.com
2
Pin Configurations
Figure2. Pin Configuration of XL4101 (Top View)
Table 1 Pin Description
Pin Number Pin Name Description
1 VIN
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.
2 SW Power Switch Output Pin (SW). Output is the switch node that supplies power to the output.
3 GND Ground Pin.(Note: Connected the back exposed PAD to Pin3.)
4 FB
Feedback Pin (FB). Through an external resistor divider
network, Feedback senses the output voltage and regulates it.
The feedback threshold voltage is 1.235V.
5 CS Output Current Sense Pin; (Iload=0.155V/Rcs)
Datasheet
3A 150kHz 40V Buck Li Battery Charger XL4101
Rev 1.2 www.xlsemi.com
3
Function Block
Figure3. Function Block Diagram of XL4101
Typical Application Circuit (Car Charger)
Figure4. XL4101 Typical Application Circuit (Li Battery Charger)
Datasheet
3A 150kHz 40V Buck Li Battery Charger XL4101
Rev 1.2 www.xlsemi.com
4
Typical Application Circuit (Buck LED Constant Current Driver)
Figure5. XL4101 Typical Application Circuit (LED Constant Current Driver)
Ordering Information
Part Number Marking ID
Lead Free Lead Free
Packing Type
XL4101E1 XL4101E1 Tube
Package
Temperature
Range
XL4101TRE1 XL4101E1 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 Unit
Input Voltage Vin -0.3 to 45 V
FB Pin Voltage VFB -0.3 to Vin V
SW Pin Voltage VSW -0.3 to Vin V
Power Dissipation PD Internally limited mW
Thermal Resistance
(Junction to Ambient, No Heatsink, Free Air) RJA
30 ºC/W
Operating Junction Temperature TJ -40 to 125 ºC
Storage Temperature TSTG -65 to 150 ºC
Lead Temperature (Soldering, 10 sec) TLEAD 260 ºC
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.
Datasheet
3A 150kHz 40V Buck Li Battery Charger XL4101
Rev 1.2 www.xlsemi.com
5
XL4101 Electrical Characteristics
Ta = 25℃;unless otherwise specified.
Symbol Parameter Test Condition Min. Typ. Max. Unit
System parameters test circuit figure4
VFB
Feedback
Voltage
Vin = 8V to 32V, Vout=5V
Iload=0.2A to 3A
1.198 1.235 1.272 V
Efficiency ŋ Vin=12V ,Vout=5V Iout=3A - 80 - %
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 Test Condition Min. Typ. Max. Unit
Input operation voltage Vin 4.5 40 V
Quiescent Supply Current Iq VFB =Vin 2 5 mA
Oscillator Frequency Fosc 127 150 172 Khz
Switch Current Limit IL VFB =0 3.6 A
Output Saturation Voltage VCE
VFB=0V
ISW=2A
1.1 1.4 V
Constant current sense
Voltage
VCS 0.140 0.155 0.170 V
Schottky Diode Selection Table
Current Surface
Mount
Through
Hole
VR (The same as system maximum input voltage)
20V 30V 40V 50V 60V
1A √ 1N5817 1N5818 1N5819
√ 1N5820 1N5821 1N5822
√ MBR320 MBR330 MBR340 MBR350 MBR360
√ SK32 SK33 SK34 SK35 SK36
√ 30WQ03 30WQ04 30WQ05
√ 31DQ03 31DQ04 31DQ05
3A
√ SR302 SR303 SR304 SR305 SR306
Datasheet
3A 150kHz 40V Buck Li Battery Charger XL4101
Rev 1.2 www.xlsemi.com
6
Package Information
TO263-5L
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