Datasheet

1
FEATURES
DESCRIPTION
APPLICATIONS
RELATED DEVICES
bq76PL102
www.ti.com .......................................................................................................................................... SLUS887A – DECEMBER 2008 – REVISED OCTOBER 2009
PowerLAN™ Dual-Cell Li-Ion Battery Monitor With PowerPump™ Cell Balancing
2
• Monitors up to Two Individual Cell Voltages
and Temperatures
The bq76PL102 PowerLAN dual-cell battery monitor
is part of a complete scalable battery management
• Part of a Complete Low-Cost Solution for
system for use with arrays of up to 12 Li-Ion
Battery Packs of up to 12 Series and One or
rechargeable cells. The bq76PL102 connects to one
More Parallel Cells (When Used With
or two cells in a series string, performs voltage and
bq78PL114).
temperature monitoring of each individual cell, and
• Advanced PowerPump™ Balancing
reports these parameters over the PowerLAN
Technology Equalizes Cells in Li-Ion Battery
communication network. Together with a bq78PL114
Packs, Resulting in Longer Run Time and Cell
master-gateway battery controller, the bq76PL102
Life.
forms a complete battery monitoring and
management system for higher cell-count
• PowerPump™ Cell Balancing Transfers
applications.
Charge From Cell to Cell During all Operating
Conditions – No Wasteful Current Bleeding or
Partitioning of the battery monitor function on a per
Associated Heat Buildup.
cell basis permits connection and measurement close
to the cell. This results in superior accuracy and
• Unique PowerLAN™ Isolated Communications
management over competing solutions. This scheme
Technology Permits Simultaneous
also facilitates the PowerPump cell balancing system,
Measurement of All Individual Cell Voltages in
a technique which actively balances capacities of
a Series String.
Li-Ion batteries without the excessive heat or
• Low Current Consumption:
limitations of bleed-balancing techniques.
– < 250 µ A Active
The bq76PL102 PowerPump cell balancing
– < 35 µ A Standby
technology uses a charge-transfer methodology
which does not bleed off excess energy as heat, but
– < 1 µ A Undervoltage Shutdown
instead moves energy dynamically from cell to cell as
• Connects Directly to Cells, No Resistive
needed. Balancing is performed during all battery
Dividers
operational modes – charge, discharge, and rest.
• Internal LDO Regulator for Support Circuitry
Balancing is automatically coordinated between all
cells on a PowerLAN system. PowerPump balancing
• Ultrasmall Footprint, 3-mm × 3-mm
technology results in longer run time and longer cell
• Millivolt Measurement Resolution Using
life.
Delta-Sigma A/D Converter
The PowerLAN communications architecture has
• Self-Calibrating Time Base – No Crystal
been engineered to provide robust communications in
Required When Used With bq78PL114
tough EMI/RFI environments while avoiding the
excessive power draw, high parts count, and elevated
cost of other solutions. PowerLAN permits easy
• Uninterruptible Power Supplies (UPS)
scalability using series connections of bq76PL102
dual-cell battery monitors. High-cell-count battery
• Portable Medical and Test Equipment
systems of up to 12 series cells are easily
• Electric Bikes and Mild-EV Battery Packs
constructed without complicated high-voltage cell
• Multicell Series Strings ≥ 5S
measurement restrictions.
The bq76PL102 works with the bq78PL114
master-gateway battery controller.
• bq78PL114 Master Gateway Battery Controller
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2 PowerPump, PowerLAN are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Copyright © 2008 – 2009, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.