19-3169; Rev 0; 1/04
MAX1538 Evaluation Kit
General Description
Features
♦ 4.75V to 28V AC-Adapter Input Range
♦ Up to 10A Steering Capability
♦ P-Channel MOSFET Steering Switches
♦ Adjustable Battery Minimum Voltage Level
♦ Adjustable Airline/AC-Adapter Detection Voltages
♦ Manual-or Computer-Controlled Interface
♦ On-Board Status LEDs
The MAX1538 evaluation kit (EV kit) is a fully assembled
and tested surface-mount circuit board that routes
charge and discharge currents between two battery
packs, a battery charger, and an AC-adapter power
source. The circuit uses a MAX1538 IC in a 28-pin thin
QFN package and is configured for a 4.75VDC to
28VDC AC-adapter input range.
The EV kit uses eight P-channel MOSFETs to steer cur-
rent between the power sources and the load. The bat-
tery minimum voltage level sets the threshold for battery
undervoltage conditions and can be adjusted from
4.65V to 13.0V.
♦ Surface-Mount Components
♦ Fully Assembled and Tested
Ordering Information
PART
TEMP RANGE
IC PACKAGE
MAX1538EVKIT
0°C to +70°C
28 Thin QFN
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
JU1–JU5
5
Not installed (SIP-2)
1.0µF 20ꢀ, 10V X5ꢁ ceramic
capacitor (0603)
TDK C1608X5ꢁ1A105M
C1
1
Digital logic N-channel MOSFETs
(SOT23)
Central Semiconductor 2N7002
Top mark = 702
N1–N3
3
C2
C3
1
1
Not installed (2220)
Not installed (D-case)
30V P-channel MOSFETs (8-pin SO)
Fairchild FDS6679
47µF, 35V low-ESꢁ tantalum
capacitors (E-case)
AVX TPSE476M035ꢁ0250 or
AVX TPSE476M035ꢁ0200
P1–P8
8
C4, C5, C6
3
ꢁ1
1
2
3
100kΩ 5ꢀ resistor (0402)
ꢁ2, ꢁ3
10kΩ potentiometers, 12-turn, 1/4in
330kΩ 5ꢀ resistors (0402)
0.1µF 20ꢀ, 50V X7ꢁ ceramic
capacitors (0603)
TDK C1608X7ꢁ1H104M
ꢁ4, ꢁ5, ꢁ6
C7, C11
C8, C9
2
2
10mΩ 2ꢀ, reverse-geometry sense
resistor (1225)
IꢁC LꢁC-LꢁF1225-01-ꢁ010-F
ꢁ7
1
0.1µF 20ꢀ, 10V X5ꢁ ceramic
capacitors (0402)
TDK C1005X5ꢁ1A104M
ꢁ8, ꢁ9, ꢁ14
ꢁ10–ꢁ13
ꢁ15, ꢁ16
ꢁ17, ꢁ18
SW1–SW3
TB1–TB4
TP1–TP12
U1
3
4
2
2
3
4
620Ω 5ꢀ resistors (1206)
160kΩ 5ꢀ resistors (0402)
500kΩ potentiometers, 12-turn, 1/4in
Not installed (2010)
4.7µF 20ꢀ, 6.3V X5ꢁ ceramic
capacitor (0805)
TDK C2012X5ꢁ0J475M
C10
1
0
3-position, SPDT, slide switches
2-circuit terminal blocks
C12, C13
Not installed (0805)
1.0µF, 50V X7ꢁ ceramic capacitor
(1206)
TDK C3216X7ꢁ1H105M
12 Test points
C14
D1
1
1
Maxim MAX1538ETI (28-pin QFN)
Maxim MAX1615EUK (5-pin SOT23)
Top mark = ABZD
Dual diode (SOT23)
Central Semiconductor CMPD3003C
Top mark = LLC
U2
1
1
3
1
Maxim MAX6817EUT (6-pin SOT23)
Top mark = AAAU
U3, U4
None
2
1
Green surface-mount LEDs (SS)
Panasonic LNJ308G8LꢁA
D2, D3, D4
J1
MAX1538 EV Kit PC board
Dual-row, 16-pin header
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.