X3100PT-V XICOR [Xicor Inc.], X3100PT-V Datasheet - Page 2

• Manufacturer Part Number: X3100PT-V
• Description: 3 or 4 Cell Li-Ion Battery Protection and Monitor IC
• Manufacturer: XICOR [Xicor Inc.]

X3100/X3101 – Preliminary Information
REV 1.1.8 12/10/02
PRINCIPLES OF OPERATION
The X3100 and X3101 provide two distinct levels of
functionality and battery cell protection:
First, in Normal mode, the device periodically checks
each cell for an over-charge and over-discharge state,
while continuously watching for a pack over-current
condition. A protection mode violation results from an
over-charge, over-discharge, or over-current state. The
thresholds for these states are selected by the user
through software. When one of these conditions occur, a
Discharge FET or a Charge FET or both FETs are
turned off to protect the battery pack. In an over-
discharge condition, the X3100 and X3101 devices go
into a low power sleep mode to conserve battery power.
During sleep, the voltage regulator turns off, removing
power from the microcontroller to further reduce pack
current.
Second, in Monitor mode, a microcontroller with A/D
converter measures battery cell voltage and pack current
via pin AO and the X3100 or X3101 on-board MUX. The
user can thus implement protection, charge/discharge,
cell balancing or gas gauge software algorithms to suit
the specific application and characteristics of the cells
used. While monitoring these voltages, all protection
circuits are on continuously.
In a typical application, the microcontroller is also
programmed to provide an SMBus interface along with
the Smart Battery System interface protocols. These
additions allow an X3100 or X3101 based module to
adhere to the latest industry battery pack standards.
PIN CONFIGURATION
*For X3101, Connect to ground.
VCELL4/VSS*
VCELL1
VCELL2
VCELL3
VCS2
VCS1
OVT
UVT
OCT
VSS
CB1
CB2
CB3
CB4
28 Lead TSSOP
9
10
11
12
13
14
1
2
3
4
5
6
7
8
X3100/
X3101
16
15
17
28
27
26
25
24
23
22
21
20
19
18
AS0
AO
RGC
CS
AS2
VCC
RGP
RGO
UVP/OCP
OVP/LMON
SCK
SO
SI
AS1
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PIN NAMES
PIN DESCRIPTIONS
Battery Cell Voltage (VCELL1-VCELL4):
These pins are used to monitor the voltage of each
battery cell internally. The voltage of an individual cell
can also be monitored externally at pin AO.
The X3100 monitors 4 battery cells. The X3101 monitors
3 battery cells. For the X3101 device connect the
VCELL4/VSS pin to ground.
Pin
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
1
2
3
4
5
6
7
8
9
VCELL4/
Symbol
VCELL1 Battery cell 1 voltage input
VCELL2 Battery cell 2 voltage
VCELL3 Battery cell 3 voltage
LMON
VCS1
VCS2
OVP/
UVP/
OCP
RGO
RGC
RGP
V
V
OVT
OCT
SCK
CB1
CB2
CB3
VSS
CB4
UVT
AS0
AS1
AS2
AO
SO
CS
SI
CC
SS
Cell balancing FET control output 1
Cell balancing FET control output 2
Cell balancing FET control output 3
Battery cell 4 voltage (X3100)
Ground (X3101)
Cell balancing FET control output 4
Ground
Current sense voltage pin 1
Current sense voltage pin 2
Over-charge detect/release time input
Over-discharge detect/release time input
Over-current detect/release time input
Analog multiplexer output
Analog output select pin 0
Analog output select pin 1
Analog output select pin 2
Serial data input
Serial data output
Serial data clock input
Chip select input pin
Over-charge Voltage Protection output/
Load Monitor output
Over-discharge protection output/
Over-current protection output
Voltage regulator output pin
Voltage regulator control pin
Voltage regulator protection pin
Power supply
Characteristics subject to change without notice.
Description
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