LX2203 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright © 2004
Rev. 1.0, 2004-11-11
LX2203 SINGLE CELL LITHIUM ION
BATTERY CHARGER
INTEGRATED PRODUCTS
LX2203 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright © 2004
Rev. 1.0, 2004-11-11
INTRODUCING TO PRODUCT
The LX2203 Evaluation Board (EB) is available from Microsemi for evaluating the performance of the LX2203
battery charger integrated circuit. (See picture 1) . The key features to be shown include : Conditioning mode, Top
off charge, inherent load disconnect and 1A constant current capability.
KEY FEATURES
• Small, High Power 10-lead MLP package
• No Sense Resistor Required
• Full Capacity Charging
• Always Cool Running
• 4.2V Applications (Consult sales for 4.1V applications)
• Tolerates 5V + 10% Wall Supply Regulation
• Conditioning Mode For Deep Discharge
• Topping Charge For Long Periods Of Non-Use
• Inherent Load Disconnect
APPLICATIONS
• Batteries with 100mAH to 1AH ratings
• Cell Phones
• PDAs
• Charging cradles
• Digital Cameras
• Low cost single Li-ion cell chargers
PART SPECIFIC INFORMATION
Part Number Product
LX2203CLD Li-Ion Battery Charger
TABLE 1 – PART INFORMATION
IC EVALUATION BOARDS
LX2203 LX2203 EVAL KIT
TABLE 2 – EVALUATION BOARD INFORMATION
LX2203 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright © 2004
Rev. 1.0, 2004-11-11
SCHEMATIC FOR LXE
LX2203
VIN
VIN
STAT
CTP
GND
BAT
BAT
CMP
EN
CCP
R3
150K
R1
470
C1
10µF
6.3V
R2
100K
C3
0.1µF
C2
10µF
6.3V
R4
75K
STAT
ON
OFF
P3
VIN
GND
GND3
Figure 1 – LX2203 Evaluation Board Schematic
LX2203 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright © 2004
Rev. 1.0, 2004-11-11
LX2203 EVAL
CONNECTIONS
The LX2203 EVAL KIT has three test points and 1
connector::
Function Label On Board
Input Power VIN+
Ground GND, GND3
Battery P3
JUMPERS
The LX2203 Evaluation Board has 1 jumper. The
jumper has two possible positions and is designed to
always be installed in one position or the other. The
function of the jumper is as follows:
Jumper Position Connection
On Pin 1 – Pin 2
Enable Off Pin 2 – Pin 3
HOOK UP
The following is a demonst ration scenario that can be
used to evaluate the LX2203 (See Figure 3):
Directions for hook up (AC adapter only mode ):
1) Place ENABLE jumper to OFF position.
2) Connect a 1AH single cell Lithium Ion
battery to the P3 terminal.
3) Apply a 5.00V power supply (>2A) between
VIN+ and GND test points.
4) Move ENABLE jumper to the ON position.
LX2203 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
Copyright © 2004
Rev. 1.0, 2004-11-11
BOARD LAYOUT AND HOOK UP
Figure 2 – LX2203 Evaluation Board Layout
Figure 3 – LX2203 Evaluation Board Ho okup
LX2203 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
Copyright © 2004
Rev. 1.0, 2004-11-11
LX2203 EVALUATION BOARD BILL OF MATERIALS
MISCELLANEOUS COMPONENTS
Line
Item Part Description Manufacturer & Part # Case Reference
Designators Qty
1 Microsemi Li-Ion Battery Charger IC MICROSEMI L2203CLD MLD U3 1
2 LED SMT Green MICROSEMI UPBLED470-B STAT 1
3 Test Point – W Loop KEYSTONE 5007 GND, GND3, VIN+ 3
4 Header .100 Straight P1 1
5 Terminal Block 2pin 7mm spacing OST OST/2/7.0 P3 1
6 PCB SGE3525 X1 1
CAPACITORS
Line
Item Part Description Part Description Case Reference
Designators Qty
1 Capacitor 10µF, X5R, 16V, 20% TAIYO YUDEN EMK325BJ106MN 1210 C1, C2 2
2 Capacitor 0.1µF, X7R, 10%, 50V PANASONIC ECJ2YB1H104K 0805 C3 1
RESISTORS
Line
Item Part Description Part Description Case Reference
Designators Qty
1 Resistor, 470, 1/8W, 5% ROHM MCR10EZHJ471
0805 R1 1
2 Resistor, 100K, 1/8W, 5% ROHM MCR10EZHJ104
0805 R2 1
3 Resistor, 150K, 1/8W, 5% ROHM MCR10EZHJ154
0805 R3 1
4 Resistor, 90.9K, 1/8W, 5% ROHM 0805 R4 1
