LX2202
®
2A Li-Ion Linear Charger and Power Control
TM
P
RODUCTION DATA SHEET
KEY FEATURES
DESCRIPTION
Up to 2A Charge Current
Internal Pass Element Can
Function as a Reverse Direction
Load Switch
USB Compliant Charging States
using optional USB input
Isolated Battery Topology
Low RdsON in Discharge Mode
Full Capacity Charging
True Charge Indicator
Wall Supply Regulator Tolerance
5V + 10%
Topping Charge with Voltage
Monitoring Mode
Improved charge/discharge mode
detection circuitry
Small, High Power 20-lead MLP
package
The LX2202 Linear Battery Charger is a
The LX2202 (compared to the LX2201)
multi-state (2 stage) Li-Ion battery charger has improved charge and discharge mode
(Constant current / Constant voltage) that is detection circuitry. A UVLO feature prevents
designed to minimize battery charge time battery charging when VDD is less than 3.6V.
(even from current limited sources such as
USB) and provide a simplified interface to program the constant charge current level, for
control battery discharge. setting the termination charge current, and for
LX2202 features up to 2A charging varying the USB charge current limits.
current from an AC adapter and an isolated LX2202 support two types of Li-Ion
battery topology to minimize charge time battery chemistry; 4.1V and 4.2V through
from current limited sources such as USB. logical input (VM pin). The LX2202
A thermal control loop maintains a safe provides a charging status indicator.
The LX2202 uses three resistors to
operating temperature at all times.
The LX2202 provides
The LX2202 features
a
pre-charge
a
seamless conditioning mode for batteries that have
complete battery interface. When the input been deeply discharged and also has a top off
power source is removed, the LX2202 charge mode for batteries that are left on the
provides the discharge path for the battery charger for extended periods.
Selectable Li-Ion Battery for 4.1V
or 4.2V Applications
with extremely low discharge impedance.
The LX2202 is available in a high power
This eliminates the need for external 4mm x 4mm, 20-pin MLP, surface mount
APPLICATIONS
discharge switch and voltage supervisors.
In USB mode, the LX2202 provides
three levels of current limit: 100mA,
500mA, and off.
package.
Batteries up to 4AH Ratings (C/2)
Cell Phones
PDAs
Charging Cradles
Digital Cameras
Low Cost Single Li-Ion Cell Chargers
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
State Select Truth Table
Power On/Off
Wall Adapter
VID0 VID1
VDD > VBAT
VBAT > VDD
Switch open – charging
disabled.
Switch open – discharge
disabled.
Main Internal
Power Bus
VDD
NU
0
0
0
1
VDD
VDD
VDD
USB
BAT
BAT
BAT
CMP
Charging – USB high level if
Switch open – discharge
disabled.
B220
LX2202
using USB
.
10µF
Battery Discharging. MOSFET
fully enhanced with current
flow VBAT to VDD.
Charging – USB low level if
using USB.
1
1
0
1
0.1µF
To VDD
2.55k
10µF
105k 72.3k
Charge
Indicator
Battery Discharging. MOSFET
fully enhanced with current
flow VBAT to VDD.
2.49k
Charging – USB high level if
using USB
.
PACKAGE ORDER INFO
Plastic MLP
4x4mm 20-Pin
Note: Available in Tape & Reel.
Append the letters “TR” to the part number.
(i.e. LX2202CLQ-TR)
LQ
TA(°C)
RoHS Compliant / Pb-free
-40 to 125
LX2202CLQ
Copyright © 2004
Rev. 1.0, 2005-03-18
Microsemi
Page 1
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570