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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1666S Datasheet

Advanced Lithium-Ion Battery-Pack Protector

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MAX1666S pdf
19-1465; Rev 1; 7/99
Advanced Lithium-Ion
Battery-Pack Protector
General Description
The MAX1666 provides complete protection against over-
voltage, undervoltage, overcharge current, overdischarge
current, and cell mismatch for 2-cell to 4-cell Lithium-Ion
battery packs. The voltage of each cell in the battery pack
is checked and compared to the programmable threshold
and to the other cells in the pack.
The MAX1666 protects the battery pack in an overcurrent
condition by disconnecting the pack from the load at a pro-
grammable limit. On-chip power MOSFET drivers control
external P-channel MOSFETs to disconnect the cells from
external terminals when faults occur.
The MAX1666 employs a unique timing scheme that allows
three modes of operation, for optimal performance and bat-
tery power conservation. The MAX1666 can operate in a
stand-alone configuration or in conjunction with a micro-
controller. It is available in three versions: the “S” version
monitors two Li-Ion cells, the “V” version monitors three
cells, and the “X” version monitors four cells.
Applications
2/3/4-Cell Lithium-Ion Battery Pack
Features
o Overvoltage Protection
Programmable Limits from +4.0V to +4.4V
Accurate to ±0.5%
o Undervoltage Protection
Programmable Limits from +2.0V to +3.0V
Accurate to ±2.5%
o Cell Mismatch Protection
Programmable Limits from 0 to 500mV
Accurate to ±10%
o Overcharge Current Protection
o Overdischarge Current Protection
o Low Operating Supply Current: 30µA typ
o Low Standby Current: 1µA max
o +28V max Input Voltage
o Available in Small 16-Pin QSOP (MAX1666S) and
20-Pin QSOP (MAX1666V/X) Packages
PART
MAX1666S
MAX1666V
MAX1666X
Selector Guide
NUMBER OF LI-ION CELLS
2
3
4
Typical Operating Circuits appear at end of data sheet.
PART
MAX1666SEEE
MAX1666VEEP
MAX1666XEEP
Ordering Information
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
16 QSOP
20 QSOP
20 QSOP
Pin Configurations
TOP VIEW
SRC 1
DSO 2
TKO 3
CGO 4
B2P 5
BIP 6
GND 7
PKN 8
MAX1666S
QSOP
16 VCC
15 REF
14 OVA
13 UVA
12 MMA
11 PKF
10 CGI
9 DSI
SRC 1
DSO 2
TKO 3
CGO 4
B3P 5
B3P 6
B2P 7
B1P 8
GND 9
PKN 10
MAX1666V
20 UVO
19 VCC
18 REF
17 OVA
16 UVA
15 MMA
14 WRN
13 PKF
12 CGI
11 DSI
SRC 1
DSO 2
TKO 3
CGO 4
B4P 5
B3P 6
B2P 7
B1P 8
GND 9
PKN 10
MAX1666X
20 UVO
19 VCC
18 REF
17 OVA
16 UVA
15 MMA
14 WRN
13 PKF
12 CGI
11 DSI
QSOP
QSOP
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1666S Datasheet

Advanced Lithium-Ion Battery-Pack Protector

No Preview Available !

MAX1666S pdf
Advanced Lithium-Ion
Battery-Pack Protector
ABSOLUTE MAXIMUM RATINGS
SRC, DSO, TKO, CGO, UVO, PKF, WRN to GND ...-0.3V to +28V
VCC, REF, OVA, UVA, MMA to GND ........................-0.3V to +6V
B4P to B3P ...............................................................-0.3V to +6V
B3P to B2P ...............................................................-0.3V to +6V
B2P to B1P ...............................................................-0.3V to +6V
B1P to GND ..............................................................-0.3V to +6V
PKN to GND...........................................................................±2V
VCC, CGI, DSI to PKN...............................................-0.3V to +6V
Continuous Power Dissipation (TA = +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)...........667mW
20-Pin QSOP (derate 9.1mW/°C above +70°C)...........727mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10sec) .............................+300°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VSRC = 16V, each cell voltage VCELL = 3.6V, 330kload at REF, TA = 0°C to +85°C, unless otherwise noted. Typical values are at
TA = +25°C.)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Charge Mode Detection Threshold
SRC Input Current Range
VSRC - VB_P
VSRC - VB_P = 1V
1V
2 10 µA
Supply Current
ISUP
No faults, long time average current from
the top battery terminal B_P
30 45 µA
Shutdown Supply Current
VCC Output Voltage
ISHDN
VCC
RLOAD 665, 2V < VCELL < 4.4V
1
3.09 3.25 3.41
µA
V
VCC Undervoltage Lockout
Threshold
2.7 2.85
3
V
Reference Output Voltage
VREF Pulse on
1.221
V
OVA = GND
3.980 4.000 4.020
Overvoltage Threshold
Cell voltage rising
VOVA = VREF / 2
OVA = REF
4.2
4.378 4.400 4.422
V
Overvoltage Threshold Hysteresis
200 mV
UVA = GND
1.950 2.000 2.050
Undervoltage Threshold
Cell voltage falling
VUVA = VREF / 2
UVA = REF
2.500
2.925 3.000 3.075
V
Undervoltage Threshold Hysteresis
100 mV
WRN Early Warning Threshold
Above undervoltage threshold,
cell voltage falling
100 mV
WRN Early Warning Threshold
Hysteresis
200 mV
OVA, UVA, MMA Input Current
Cell Mismatch Threshold
OVA, UVA, MMA = REF
MMA = GND
All cells > 2V
VMMA = VREF / 2
MMA = REF
±450
0.1
±0
±250
±500
20
±550
nA
mV
PKN to GND Overdischarge
Current Threshold
270 300 330 mV
PKN to GND Overcharge Current
Threshold
-220 -200 -180 mV
2 _______________________________________________________________________________________


Part Number MAX1666S
Description Advanced Lithium-Ion Battery-Pack Protector
Maker Maxim
Total Page 16 Pages
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