19-2096; Rev 0; 7/01
MAX1873 Evaluation Kit
General Description
The MAX1873 evaluation kit (EV kit) is a complete, fully
assembled and tested PC board that is capable of sup-
plying power to a system load while charging a lithium-
ion (Li+) or nickel (Ni)-based battery pack. The EV kit is
preset to limit the total source current and the maximum
battery-charging current to 3A, and to charge 4-series
Li+ cells up to 4.2V each. An analog output voltage
proportional to the charging current also permits an
ADC or microcontroller to monitor the charging current.
The EV kit requires a power source with a minimum out-
put of 18.5V.
The EV kit can be reconfigured to limit the total input
current drawn from the power source, the maximum
battery-charging current, and the charging cell voltage.
The Li+ cell voltage can be set between 4.009V and
4.387V using standard 1% resistors. To charge Li+ bat-
tery packs with two or three cells, replace the IC on the
EV kit board with one of the ICs listed on the
Parts
Selection Table.
o
Input-Current Source Limiting
o
Charges 4 Lithium-Ion Batteries
o
Also Charges Ni-Based Batteries
o
Up to 28V Input
o
300kHz PWM Operation
o
16-Pin QSOP Package
o
Surface-Mount Construction
o
Fully Assembled and Tested
Features
Evaluates: MAX1873
Ordering Information
PART
MAX1873EVKIT
TEMP. RANGE
0擄C to +70擄C
IC PACKAGE
16 QSOP
Component Suppliers
SUPPLIER
AVX
Fairchild
IRC
Murata
Sumida
Taiyo Yuden
TDK
PHONE
843-448-9411
888-522-5372
361-992-7900
770-436-1300
847-545-6700
800-348-2496
847-803-6100
FAX
843-448-1943
972-910-8036
361-992-3377
770-436-3030
847-545-6720
847-925-0899
847-390-6296
Part Selection Table
PART
MAX1873REEE
MAX1873SEEE
MAX1873TEEE
LITHIUM-ION
Ni CELLS
CELLS TO
TO CHARGE
CHARGE
2
3
4
5, 6
7, 8, 9
10
INPUT
VOLTAGE
RANGE
9.5V to 28V
14.0V to 28V
18.5V to 28V
Note:
Please indicate you are using the MAX1873 when
contacting these manufacturers.
Component List
DESIGNATION
QTY
DESCRIPTION
2.2碌F 鹵20%, 10V X5R
ceramic capacitor (0805)
Taiyo Yuden LMK212BJ225MG or
TDK C2012X5R1A225KT
0.22碌F 鹵10%, 35V X7R
ceramic capacitors (0805)
Taiyo Yuden GMK212BJ224KG or
TDK C2012X7R1H224KT
0.047碌F 鹵10%, 50V X7R
ceramic capacitors (0805)
Taiyo Yuden UMK212BJ473KG
DESIGNATION
QTY
DESCRIPTION
0.1碌F, 50V, X7R ceramic
capacitors (0805)
Taiyo Yuden UMK212BJ104KG or
TDK C2012X7R1H104KT
22碌F 鹵10%, 35V low-ESR tantalum
capacitors (E)
AVX TPSE226K035R0200
68碌F 鹵20%, 25V low-ESR tantalum
capacitor (E)
AVX TPSE686M025R0125
Not installed, capacitors (E)
C1
1
C6, C7, C8,
C14, C15
5
C2, C3
2
C9, C10
2
C11
C12
1
0
C4, C5
2
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
1
2
3
4
5
