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