MAX1737EVKIT Datasheet, PDF (1/5 Pages) Maxim Integrated Products – MAX1737 Evaluation Kit

19-1884; Rev 0;12/00
MAX1737 Evaluation Kit
General Description
The MAX1737 evaluation kit (EV kit) is an assembled
and tested PC board that implements a step-down,
switching lithium-ion (Li+) battery charger. It can be set
to charge 1 to 4 series cells. The cell voltage can be set
between 4.0V and 4.4V, using standard 1% resistors,
while maintaining 1% overall regulation accuracy.
The MAX1737 detects faulty cells and terminates
charging. Two capacitors are used to set the charge
termination, prequalification, and fault timeout periods.
Three LEDs indicate the charging status. A user-sup-
plied thermistor can be connected to the MAX1737 EV
kit to monitor battery temperature and suspend charg-
ing for over- and undertemperature conditions.
Features
o Complete Li+ Charging Solution for 1 to 4 Cells
o Low Heat and High Efficiency
o 300kHz PWM Operation
o Up to 28V Input Voltage Range
o 28-Pin QSOP Package
o Surface-Mount Construction
o Fully Assembled and Tested
Ordering Information
PART
MAX1737EVKIT
TEMP. RANGE
0°C to +70°C
IC PACKAGE
28 QSOP
Component List
DESIGNATION
C1
C2, C4, C7, C10,
C11
C3
C5, C6
C8, C9
C12, C13, C14,
C21, C22, C23
C15
C18, C19
D1, D4
QTY
1
5
1
2
2
6
1
2
2
DESCRIPTION
4.7µF, 10V X5R ceramic
capacitor
Taiyo Yuden
LMK316BJ475ML or
Murata GRM42-6X5R475K10
0.1µF, 50V X7R ceramic
capacitors (0805)
Murata GRM40034X7R104K050
or
Taiyo Yuden
UMK212BJ104KG
0.22µF, 50V X7R ceramic
capacitor
Taiyo Yuden
UMK316BJ224ML
0.047µF, 50V X7R ceramic
capacitors
0.1µF, 50V X7R ceramic
capacitors (1206)
1000pF, 50V X7R ceramic
capacitors
68µF, 20V, 0.150Ω, low-ESR
tantalum capacitor
AVX TPSE686M020R0150
22µF, 35V, 0.300Ω, low-ESR
tantalum capacitors
AVX TPSE226M035R0300 or
Kemet T495X226M035AS
Schottky diodes, 3A, 40V
Fairchild MBRS340,
General Semiconductor SS34,
Motorola MBRS340, or
Vishay Liteon/Diodes, Inc.
B340
DESIGNATION
D2, D3
JU1, JU3, JU4
JU2, JU5
JU6
JU7, JU8
L1
LED1, LED2
LED3
N1 (N1A, N1B)
R1, R11
R2, R3, R4
R5−R10
R12
R13, R14, R19,
R20
R15, R17
R18
U1
None
QTY
2
5
2
1
0
1
2
1
1
2
3
6
1
4
0
1
1
5
DESCRIPTION
Diodes 1N4148-type
Fairchild MMSD4148,
General Semiconductor
1N4148W, or Vishay Liteon/
Diodes, Inc. 1N4148W
2-pin headers
3-pin headers
4-pin header
Not installed
22µH, 2.8A inductor
Sumida CDRH124-220
Light-emitting diodes (green)
Light-emitting diode (red)
Dual N-channel MOSFET
Fairchild FDS6990A
10kΩ ±5% resistors
1kΩ ±5% resistors
100kΩ ±1% resistors
0.05Ω ±1%, 0.5W sense resistor
Dale-Vishay WSL-2010-R050F
or
IRC LRC-LR2010-01-R050-F
4.7Ω ±5% resistors
Not installed
0.1Ω ±1%, 0.5W sense resistor
Dale-Vishay WSL-2512-R100F
or
IRC LRC-LR2512-01-R100-F
MAX1737EEI
Shunts
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