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XLSEMI

XL4002 Datasheet Preview

XL4002 Datasheet

2A 52KHz 40V Buck Li Battery Charger

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2A 52KHz 40V Buck Li Battery Charger
Datasheet
XL4002
Features
„ Wide 4.5V to 40V Input Voltage Range
„ Output Adjustable from 1.235V to 37V
„ Minimum Drop Out 1.5V
„ Fixed 52KHz Switching Frequency
„ 2A Constant Output Current Capability
„ Internal Optimize Power Transistor
„ Excellent line and load regulation
„ TTL shutdown capability
„ ON/OFF pin with hysteresis function
„ With output constant current loop
„ Built in thermal shutdown function
„ Built in current limit function
„ Built in output over voltage protection
„ SOP8-EP (Exposed PAD) package
General Description
The XL4002 is a 52 KHz fixed frequency
PWM buck (step-down) DC/DC converter,
capable of driving a 2A 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 enable
function, an over current protection function
is built inside. An internal compensation
block is built in to minimize external
component count.
Applications
„ Car Charger
„ Battery Charger
Figure1. Package Type of XL4002
Rev 1.0
www.xlsemi.com
1




XLSEMI

XL4002 Datasheet Preview

XL4002 Datasheet

2A 52KHz 40V Buck Li Battery Charger

No Preview Available !

2A 52KHz 40V Buck Li Battery Charger
Pin Configurations
Datasheet
XL4002
XL4002
Figure2. Pin Configuration of XL4002 (Top View)
Table 1 Pin Description
Pin Number
1,2
3
4
5
6
7,8
Pin Name
SW
GND
FB
CS
EN
VIN
Description
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)
Enable Pin. Drive EN pin low to turn on the device, drive it high
to turn it off. Floating is default low.
Supply Voltage Input Pin. XL4002 operates from a 4.5V to 40V
DC voltage. Bypass Vin to GND with a suitably large capacitor
to eliminate noise on the input.
Rev 1.0
www.xlsemi.com
2


Part Number XL4002
Description 2A 52KHz 40V Buck Li Battery Charger
Maker XLSEMI
Total Page 7 Pages
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