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X3102 Datasheet PDF : 32 Pages
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Data Sheet
December 22, 2004
X3102
FN8246.0
3 Cell Li-Ion Battery Protection and
Monitor IC
The X3102 is a protection and monitor IC for use in battery
packs consisting of 3 series Lithium-Ion battery cells. The
device provides internal over-charge, over-discharge, and
overcurrent protection circuitry, internal EEPROM memory,
an internal voltage regulator, and internal drive circuitry for
external FET devices that control cell charge, discharge, and
cell voltage balancing.
Over-charge, over-discharge, and overcurrent thresholds
reside in an internal EEPROM memory register and are
selected independently via software using a 3MHz SPI serial
interface. Detection and time-out delays can also be
individually varied using external capacitors.
Using an internal analog multiplexer, the X3102 allows
battery parameters such as cell voltage and current (using a
sense resistor) to be monitored externally by a separate
microcontroller with A/D converter. Software on this
microcontroller implements gas gauge and cell balancing
functionality in software.
The X3102 contains a current sense amplifier. Selectable
gains of 10, 25, 80 and 160 allow an external 10 bit A/D
converter to achieve better resolution than a more expensive
14 bit converter.
An internal 4kbit EEPROM memory featuring IDLock™,
allows the designer to partition and “lock in” written battery
cell/pack data.
The X3102 is housed in a 28 Pin TSSOP package.
Pinout
X3102 (TSSOP)
TOP VIEW
VCELL1
1
CB1
2
VCELL2
3
CB2
4
VCELL3
5
CB3
6
VSS
7
NC
8
VSS
9
VCS1
10
VCS2
11
OVT
12
UVT
13
OCT
14
28
VCC
27
RGP
26
RGC
25
RGO
24
UVP/OCP
23
OVP/LMON
22
CS
21
SCK
20
SO
19
SI
18
AS2
17
AS1
16
AS0
15
AO
Features
• Software Selectable Protection Levels and Variable
Protect Detection/Release Times
• Integrated FET Drive Circuitry
• Cell Voltage and Current Monitoring
• 0.5% Accurate Voltage Regulator
• Integrated 4kbit EEPROM
• Flexible Power Management with 1µA Sleep Mode
• Cell Balancing Control
Benefit
• Optimize protection for chosen cells to allow
maximum use of pack capacity.
• Reduce component count and cost
• Simplify implementation of gas gauge
• Accurate voltage and current measurements
• Record battery history to optimize gas gauge, track pack
failures and monitor system use
• Reduce power to extend battery life
• Increase battery capacity and improve cycle life battery life
Ordering Information
PART
NUMBER
X3102V28
VCC LIMITS
6V to 24V
TEMP. RANGE
(°C)
PACKAGE
-20 to +70 28 Ld TSSOP
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-352-6832 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2004. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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