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PDF LX2201 Data sheet ( Hoja de datos )
| Número de pieza | LX2201 | |
| Descripción | USB Li-Ion Battery Charger | |
| Fabricantes | Microsemi Corporation | |
| Logotipo |  |
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LX2201
www.DataSheet4U.com
TM ® USB Li-Ion Battery Charger
PRODUCTION DATA SHEET
DESCRIPTION
The LX2201 Linear Battery Charger is a
multi-state (2 stage) Li-Ion battery charger
(Constant current / Constant voltage) that
can supply up to 2A of charging current into
a single cell Li-Ion battery.
LX2201 is a cost effective , high perfor-
mance USB battery charger. The LX2201
features a 2A high charge current, with
automatic power savings using isolated
battery topology, user programmability in
USB charging, and an extended battery life
with low RdsON in discharge.
In USB mode, the LX2201 has
advantages over competition chargers with
the USB Limit Control circuit and low
RdsON in discharge mode. The USB limit
Control circuit allows simultaneous battery
charging while the device is in operation.
The VDD to supply load is independent of
the VBAT charging logic. In discharge mode
a low RdsON provides low loss and heavy
transient.
The LX2201 is a low cost, highly
integrated battery charger solution. . It only
requires three external resistors: one for
setting the constant charge current level, one
for setting the termination charge current,
and one for setting VIN . It also has a built
in thermostat that will throttle back the
charge current to keep the die temperature
from exceeding 150°C; this feature insures
the LX2201 delivers the maximum charge
rate for a given thermal environment.
LX2201 support two types of Li-Ion
battery chemistry; 4.1V and 4.2V through
logical input (VM pin).. A high accuracy
current sensing circuit allows batteries to
be fully charged before terminating the
charge cycle. The LX2201 design
enhances system battery life by avoiding
premature discharge of Li-Ion battery with
a separate battery terminal voltage from
system load when adaptor charging is used,
i.e. trickle charge.
The LX2201 provides a charging status
indicator. The integrated PMOS pass element
features low drop out voltage while providing
an inherent load disconnect with virtually no
drain on the battery when disabled or when
the input power is removed. Additionally a
battery load disconnect switch has been
integrated which provides seamless power
switching when transitioning between charge
and discharge modes.
The LX2201 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 LX2201 is available in a high power
4mm x 4mm, 20-pin MLP, surface mount
package.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
KEY FEATURES
2A Charge Current
USB Compliant Charging States
Low RdsON in Discharge Mode
Power Saving and Conditional
Mode for Deep Discharge
Selectable Li-Ion Battery for 4.1V
or 4.2V Applications
Internal Pass Element Can
Function as a Reverse Direction
Load Switch
No Sense Resistor Required
Full Capacity Charging
True Charge Indicator
Wall Supply Regulator Tolerance
5V + 10%
Built In MOSFET Driver For Easy
AC Adapter/USB Implementation
Topping Charge with Voltage
Monitoring Mode
Inherent Load Disconnect
Small, High Power 20-lead MLP
package
APPLICATIONS
Batteries with 350mAH to 2AH
Ratings
Cell Phones
PDAs
Charging Cradles
Digital Cameras
Low Cost Single Li-Ion Cell
Chargers
USB Lo / Hi
To System
Regulator
AC/DC Adapter
USB POWER
VDD
BAT
VDD
BAT
VDD LX2201 BAT
VDD
BAT
VIN CMP
PRODUCT HIGHLIGHT
VID0
0
0
1
1
VID1
0
1
0
1
State Select Truth Table
VDD > VBAT
Switch open – charging
VBAT > VDD
Switch open – discharge
disabled.
disabled.
Charging – USB high level if Switch open – discharge
using VIN.
disabled.
Charging – USB low level if
using VIN.
Charging – USB high level if
using VIN.
Battery Discharging. MOSFET
fully enhanced with current
flow VBAT to VDD.
Battery Discharging. MOSFET
fully enhanced with current
flow VBAT to VDD.
Copyright © 2000
Rev. 1.2b, 2005-04-13
PACKAGE ORDER INFO
TA(°C)
Plastic MLP
LQ 4x4mm 20-Pin
RoHS Complaint / Pb-free
0 to 70
LX2201CLQ
Note: Available in Tape & Reel.
Append the letters “TR” to the part number.
(i.e. LX2201CLQ-TR)
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
1 page  
LX2201
www.DataSheet4U.com
TM ® USB Li-Ion Battery Charger
PRODUCTION DATA SHEET
APPLICATION CIRCUITS
LX2201 CONTROL FLOW DIAGRAM
START
RETURN TO START IF
VIN > VBAT OR VIDX CHANGE STATE.
VDD > VBAT NO
YES
VID0 = 1
YES
NO
VID0 = 1
YES
NO
NO CONDITION
VBAT>60%
CHARGE
MODE
YES
VID0 = 1
NO
YES
D IS C H A R G E
MODE
S W IT C H
OFF
CONSTANT CURRENT
CHARGE MODE
IUSB DETERMINED BY THE
STATE OF VID1.
TEMP < 140
YES
NO
IIN < IUSB
YES
NO
REDUCE
CHARGE
CURRENT
REDUCE
CHARGE
CURRENT
NO VBAT> VCV
TEMP < 140
YES
NO
IIN < IUSB
YES
NO
NO IBAT<IMIN
YES
REDUCE
CHARGE
CURRENT
REDUCE
CHARGE
CURRENT
YES
CONSTANT VOLTAGE
CHARGE MODE
VOLTAGE
M O N IT O R IN G
MODE (STATE).
VBAT<97%
YES
NO
RETURN TO THE TOP
OF THE CHART.
Figure 2 – Control Flow Diagram
Copyright © 2000
Rev. 1.2b, 2005-04-13
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
5 Page 
LX2201
www.DataSheet4U.com
TM ® USB Li-Ion Battery Charger
PRODUCTION DATA SHEET
NOTES
Copyright © 2000
Rev. 1.2b, 2005-04-13
PRODUCTION DATA – Information contained in this document is proprietary to
Microsemi and is current as of publication date. This document may not be modified in
any way without the express written consent of Microsemi. Product processing does not
necessarily include testing of all parameters. Microsemi reserves the right to change the
configuration and performance of the product and to discontinue product at any time.
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LX2201.PDF ] | |
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