MAX1640 Evaluation Kit
_______________General Description
The MAX1640 evaluation kit (EV kit) is an adjustable
switch-mode current source that operates from a 5.5V to
26V input. It is intended for microprocessor-controlled
battery chargers. The charging current, maximum volt-
age, and pulse-trickle charge are programmed with
external resistors. The EV kit is shipped configured for
a maximum charge voltage (6 cells). It is configured
as a step-down pulse-width modulator (PWM) with syn-
chronous rectification, allowing fast-charge currents up
to 1.5A with greater than 90% efficiency. The MAX1640
uses high-side current sense; this allows the load to
connect directly to ground, eliminating ground potential
errors. The MAX1641 uses low-side current sense.
The MAX1640 EV kit is a fully assembled and tested sur-
face-mount printed circuit board. It can also be used to
evaluate the MAX1641.
____________________________Features
o
5.5V to 26V Input Voltage Range
o
Tight Current-Regulation Accuracy:
2% (MAX1641); 5% (MAX1640)
o
Up to 1.5A Fast-Charge Current
o
Up to 500kHz PWM Operation
o
Pulse-Trickle Charge Current
o
100% Maximum Duty Cycle (low dropout)
o
Synchronous Rectifier
o
Surface-Mount Components
o
Fully Assembled and Tested
Evaluates: MAX1640/MAX1641
______________Ordering Information
PART
MAX1640EVKIT
TEMP. RANGE
0擄C to +70擄C
BOARD TYPE
Surface Mount
Note:
To evaluate the MAX1641, request a MAX1641EEE free
sample with the MAX1640 EV kit.
_____________________________________________________________Component List
DESIGNATION QTY
C1, C8
C2
C3, C6, C7
C4
C5
C9
D1
(optional)
J1, J2
J3
L1
2
1
3
1
1
0
0
2
1
1
DESCRIPTION
47碌F, 35V electrolytic capacitors
Sanyo 35CV47GX
0.33碌F ceramic capacitor
0.1碌F ceramic capacitors
0.01碌F ceramic capacitor
4.7碌F, 16V tantalum capacitor
Sprague 595D475X0016A2T
Open
1A, 30V Schottky diode Motorola
MBRS130LT3 or Nihon EC10QS03
2-pin term connectors
6-pin header
47碌H power inductor
Sumida CDRH125-470,
Coilcraft DO3316P-473, or
Coiltronics UP2-470
R3, R5
R4, R7, R10
R6, R8, R9
R11
SW1
U1
U2
None
None
None
2
3
3
0
1
1
1
1
1
1
DESIGNATION QTY
R1, R2
2
DESCRIPTION
0.100鈩? 1% 1/2W resistors
Dale WSL-2010-R100-F or
IRC LR2010-01-R100-F
68k鈩? 5% resistors
200k鈩? 5% resistors
1M鈩? 5% resistors
Open
4-position dip switch
MAX1640EEE (QSOP-16)
Dual P- and N-channel MOSFET (SO-8)
International Rectifier IRF7309 or
Siliconix Si4539DY
MAX1640/MAX1641 data sheet
MAX1640/MAX1641 PC board
Shunt
________________________________________________________________
Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
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