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TM ®
LX2203
Li-Ion Battery Charger
P RODUCTION D ATA S HEET
DESCRIPTION
KEY FEATURES Up to 1A charge current Low drop out design Reverse leakage protection Linear thermal control loop Pre-charge conditioning Programmable Termination Current Short Circuit protected Small 3x3mm MLP package
APPLICATIONS
The LX2203 is a tiny linear battery charger for Lithium Ion or Lithium Polymer batteries. The LX2203 includes built in MOSFET, accurate current and voltage regulation, reverse blocking protection, over temperature control, and charge status indicator. The accurate programmable charge current and independent termination current programming make it easy to logically reprogram the charge current limit at any time.
The LX2203 charges the battery in two phases: constant current and constant voltage. A reduced current conditioning mode is provided for deeply discharged batteries. The LX2203 automatically restarts if the battery voltage falls below the top-off threshold. The LX2203 enters a low quiescent current sleep mode when power is removed.
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IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PDAs, MP3 Players Cell Phones Charging cradles Digital Cameras
PRODUCT HIGHLIGHT
AC/DC Adapter
VIN VIN STAT CTP GND
BAT BAT
LX2203
CMP EN CCP
+
EN 0 1
MODE Sleep mode – charge disabled Charge enabled.
ON/OFF
PACKAGE ORDER INFO
_
LX2203
TA (°C) -40 to 85
LD
Plastic MLP 10-Pin
RoHS Compliant / Pb-free
LX2203CLD
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX2203CLD-TR)
Copyright © 2004 Rev. 1.0a, 2005-08-10
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
www.DataSheet4U.com
TM ®
LX2203
Li-Ion Battery Charger
P RODUCTION D ATA S HEET
ABSOLUTE MAXIMUM RATINGS Supply Voltage (VIN)....................................................................................... -0.3V to 7V Input Signals (SHDN, EN,CMP) ...................................................................... -0.3V to 7V Battery Charging Current (IBAT)....................................................................................1.2A Operating Junction Temperature................................................................... -40C to 150°C Storage Temperature Range.........................................................................-65°C to 150°C
RoHS / Pb-free Peak Package Solder Reflow Temp(40 seconds max. exposure) ............260°C (+0 -5) Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to Ground. Currents are positive into, negative out of specified terminal.
PACKAGE PIN OUT
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VIN VIN STAT CTP GND
1
10
BAT BAT CMP EN CCP
2
9
3
8
4
Connect Bottom to Power GND
7
5
6
THERMAL DATA
LD PACKAGE
(Top View)
RoHS / Pb-free 100% Matte Tin Lead Finish
LD
Plastic Micro Leadframe Package 10-Pin THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
49°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJA). The θJA numbers are guidelines for the thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
FUNCTIONAL PIN DESCRIPTION Name BAT CCP CMP CTP EN GND STAT VIN Description Charging Output - This pin is wired to the positive terminal of the battery. (The negative battery terminal is wired to GND.) Charge Current Programming Pin - A resistor (Rccp) is connected between this pin and GND. See application section for programming information. Compensation Pin – Apply a 0.01µF capacitor between CMP and VIN pins. Charge Termination Programming Pin – A resistor (Rctp) is connected between this pin and GND See application section for programming information. Enable - Applying a TTL compatible Hi signal enables the charger, a Low signal disables the charger and puts it in sleep mode. Common Ground. Status - This pin is a logic low level when the battery is being charged. Pin can sink up to 5mA.
PACKAGE DATA
Voltage Input – Supply Voltage. Must be greater than VBAT to charge.
Copyright © 2004 Rev. 1.0a, 2005-08-10
Microsemi
Integrated Products Division 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
www.DataSheet4U.com
TM ®
LX2203
Li-Ion Battery Charger
P RODUCTION D ATA S HEET
Unless otherwise specified, the following specifications apply over the ambient temperature 0°C ≤ TA noted and the following test conditions: VVIN = 5V, VBAT =3.8V, Rccp = 90.9k, Rctp = 150k. Parameter `
MAIN CIRCUITRY Input Voltage Quiescent Current CTP Bias Voltage CCP Bias Voltage VVIN IGND VCTP VCCP VEN = Hi VEN = Lo
ELECTRICAL CHARACTERISTICS
≤
70°C except where otherwise
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Symbol
Test Conditions
Min
4.35
LX2203 Typ
Max
6
Units
V mA µA V V
3 7 1.25 1.25
5
`
CONSTANT VOLTAGE MODE BAT Output Voltage Top Off Charge Droop Threshold Charge Termi.