MAX1666XEEP+ ,Advanced Lithium-Ion Battery-Pack ProtectorFeaturesThe MAX1666 provides complete protection against over-' Overvoltage Protectionvoltage, unde ..
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MAX4427CSA ,Dual High-Speed 1.5A MOSFET Drivers
MAX1666SEEE-MAX1666XEEP+
Advanced Lithium-Ion Battery-Pack Protector
General DescriptionThe 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.
Applications2/3/4-Cell Lithium-Ion Battery Pack
FeaturesOvervoltage Protection
Programmable Limits from +4.0V to +4.4V
Accurate to ±0.5%Undervoltage Protection
Programmable Limits from +2.0V to +3.0V
Accurate to ±2.5%Cell Mismatch Protection
Programmable Limits from 0 to 500mV
Accurate to ±10%Overcharge Current ProtectionOverdischarge Current ProtectionLow Operating Supply Current: 30µA typLow Standby Current: 1µA max+28V max Input VoltageAvailable in Small 16-Pin QSOP (MAX1666S) and
20-Pin QSOP (MAX1666V/X) Packages
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector19-1465; Rev 1; 7/99
Pin Configurations
Ordering InformationSelector Guide
Typical Operating Circuits appear at end of data sheet.
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS(VSRC= 16V, each cell voltage VCELL= 3.6V, 330kΩload at REF, TA= 0°C to +85°C, unless otherwise noted. Typical values are at= +25°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.
SRC, DSO, TKO, CGO, UVO,PKF, WRNto 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, DSIto 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
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector
ELECTRICAL CHARACTERISTICS (continued)(VSRC= 16V, each cell voltage VCELL= 3.6V, 330kΩload at REF, TA= 0°C to +85°C, unless otherwise noted. Typical values are at= +25°C.)
ELECTRICAL CHARACTERISTICS(VSRC= 16V, each cell voltage VCELL= 3.6V, 330kΩload at REF, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector
Note 1:Specifications to -40°C are guaranteed by design, not production tested.
ELECTRICAL CHARACTERISTICS(VSRC= 16V, each cell voltage VCELL= 3.6V, 330kΩload at REF, TA= -40°C to +85°C, unless otherwise noted.) (Note 1)
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector
Typical Operating Characteristics(TA = +25°C, unless otherwise noted.)
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector
Typical Operating Characteristics (continued)(TA= +25°C, unless otherwise noted.)
Pin Description
MAX1666S/V/X
Advanced Lithium-Ion
Battery-Pack Protector
MAX1666S/V/X
Advanced Lithium-IonFigure 1. Functional Diagram
