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PDF XM3100 Data sheet ( Hoja de datos )
| Número de pieza | XM3100 | |
| Descripción | 3 or 4 Cell Li-ion Smart Battery Pack Module | |
| Fabricantes | Xicor | |
| Logotipo |  |
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Revision 1.0
XM3100
3 or 4 Cell Li-Ion Smart Battery Pack Module
PRELIMINARY
FEATURE
• Complete Solution for 3-4 Cell Li-Ion battery pack
• X3100 and microcontroller control
www.DataSheet4U.c•omBuilt-in Gas Gauge Software
• General Purpose Microcontroller
• SMBus interface/SBS 1.1 compliant
BENEFIT
• Minimal design effort required
• Safe, accurate and flexible implementation.
• No algorithms to develop
• Custom software modules add more gas gauge
capability, cell balancing, history tracking.
• Conforms to industry smart battery standards
DESCRIPTION
The XM3100 module is a complete battery pack solution
that features the Xicor X3100 Lithium Ion battery
protection and monitor IC. For use in battery packs
consisting of 3 or 4 Lithium-Ion battery cells (10.8V or
14.4V packs) the X3100 provides over-voltage, under-
voltage, and over-current protection circuitry, internal
EEPROM memory, an internal voltage regulator, and
drive circuitry for switching external FET devices used to
control cell charge, discharge, and cell voltage
balancing. The XM3100 module provides all external
devices needed to control the battery pack including a
preprogrammed microcontroller. This microcontroller
has a System Management Bus (SMBus v.1.0) interface
with operation compliant with the Smart Battery System
1.1 Standard.
The built in software on the XM3100 module provides
coulomb counting algorithms that provide a basic battery
gas gauging function. Future versions of the board will
offer more extensive gas gauging, cell balancing routines
and pack history tracking.
The XM3100 board has outputs for a separate display
board containing five LEDs and a puchbutton switch.
This board is included with the XM3100. The LEDs and
switch allow the battery pack user to check the state of
charge without connecting the battery to the host. The
LEDs turn on for a short period of time when the switch
is pressed to show capacity as 10%, 30%, 50%, 70% or
90% of full charge.
The XM3100 board can be tailored to meet specific
customer requirements. The module over-voltage, over-
current, and under-voltage levels are easily changed
through programmable non-volatile bits. Simple
capacitor changes provide different protection time-out
periods. Specialized software routines can offer
customized gas gauging.
Pins
CL1:
CL2:
CL3:
CL4:
B-:
P+:
P-:
SMBD:
SMBC:
Battery Cell 1 (+)
Battery Cell 1 (-)/Battery Cell 2 (+)
Battery Cell 2 (-)/Battery Cell 3 (+)
Battery Cell 3 (-)/Battery Cell 4 (+)
Battery Cell 4 (-)
Battery Pack Positive Terminal
Battery Pack Negaitve Terminal
SMBus Data Line
SMBus Clock Line
©Xicor, Inc. 1994 – 1999 Patents Pending
PRELIMINARY REVISION 5.0
LED10: 10-30% Capacity indicator
LED30: 30-50% Capacity indicator
LED50: 50-70% Capacity indicator
LED70: 70-90% Capacity indicator
LED90: 90-100% Capacity indicator
SW1: Indicator LED Switch input
VRGO: Regulated 5V output to display board
NEG: Negative terminal of battery (for Thermistor)
RTH: Thermistor connection (battery pack temperature)
1 Characteristics subject to change without notice
1 page  
XM3100
PRELIMINARY
ManufactureDate
(0x1B)
This command returns the date that the pack was
manufactured.
SerialNumber
(0x1C)
This command returns the pack serial number.
ManufacturerName
(0x1D)
This command returns the pack manufacturer. The
www.DataSheet4UX.cMom3100 is programmed to return "Xicor, Inc." but the
value can be reprogrammed to meet the pack
manufacturer’s needs.
DeviceName
(0x21)
This command returns the battery’s name. The XM3100
is programmed to return the board part number, but the
value can be reprogrammed to meet the pack
manufacturer’s needs.
DeviceChemistry
(0x22)
This command returns the value "LION" to indicate that
the pack supports Li-ion batteries.
ManufacturerData
(0x23)
As specified in the Smart Battery Specification, this is a
read only command that returns a block of data from the
battery pack. It is an optional command used for reading
various parameters from the pack. The XM3100 does not
use this command, but enhanced software could use it to
read collected battery pack history, such as the number
of deep cycles, violations of temperature or current rate
extremes, and discharge patterns.
Battery Charger Messages
The battery charger can set the Battery Mode bit 14 high
and poll the battery pack to determine the battery
charging requirements. The charger can request the
battery charging current, charging voltage, and status
periodically, but it must do so at intervals from 5 to 60
seconds. If the charger periodocally polls the pack it can
disable the pack’s automatic broadcast of the charging
current and charging voltage by setting the Charger
Mode bit to one.
Charging Current
(0x14)
When receiving this command, the XM3100 returns the
the smart battery desired charging rate. This is based on
the specific cells being used in the pack.
Charging Voltage
(0x15)
When receiving this command, the XM3100 returns the
the smart battery desired charging voltage (mV). This is
based on the specific cells being used in the pack.
Battery Critical Messages
Whenever the XM3100 detects a critical condition, it
beomes the master and sends an Alarm Waring
message to both the Smart Battery Charger and the
SMBus Host, notifying them of the critical condition.
AlarmWarning or Broadcasts
(0x16)
The AlarmWarning message is sent by the XM3100,
acting as a bus master device, to the charger and host. It
is a warning that one or more alarm conditions exist. The
alarm conditions are encoded as bit fields in the
messsage. These bit fields match those of the battery
status word. The alarm warning messages are disabled
by setting the Battery Mode bit 13 high. In this case the
host and charger need to poll the battery pack to
determine the status.
A Broadcast (command 0x16) is sent by the battery pack
to other components on the SMBus. It occurs
automatically when the Battery Mode bit 14 is set low.
This broadcast occurs every 30 seconds and provides
the charger with values for desired charge current and
voltage.
Gas Gauge
The gas gauge software on the XM3100 board consists
of a simple accumulation of current based on the reading
of voltage across the sense resistor. The software makes
use of the current sense amplifier of the X3100 to
improve the accuracy of the current reading over a wide
dynamic range.
The accumulated current value is placed in a gas gauge
register consistant with the SBS 1.1 specification. Other
computations required for the SBS specification (such as
AtRate) are computed continuously. The gas gauge does
not provide routines for automatic compensation of the
gas gauge value based on temperature or current rate.
Gas Gauge Calculations
There are a number of calculations associated with the
gas gauge. Brief descriptions provided below give
additional information about the operation of the module.
Core Parameters
• Average Current: This value is updated every 1.874
seconds. It averages 32 "fast average" current values.
©Xicor, Inc. 1994 – 1999 Patents Pending
PRELIMINARY REVISION 5.0
5 Characteristics subject to change without notice
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet XM3100.PDF ] | |
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