BQ78PL116_15 Datasheet, PDF (1/37 Pages) Texas Instruments – PowerLAN™ Master Gateway Battery Management Controller

bq78PL116
www.ti.com
SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011
PowerLAN™ Master Gateway Battery Management Controller
With PowerPump™ Cell Balancing Technology
Check for Samples: bq78PL116
FEATURES
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•23 bq78PL116 Designed for Managing 3- to
16-Series-Cell Battery Systems
– Support for LCD and Electronic Paper
Displays or EPDs
– Configurable for 11-A, 26-A, or 110-A
Operating Currents
• Systems With More Than Four Series Cells
Require External bq76PL102 Dual-Cell
Monitors
• SmartSafety Features:
– Prevention: Optimal Cell Management
– Diagnosis: Improved Sensing of Cell
Problems
– Fail Safe: Detection of Event Precursors
• Rate-of-Change Detection of All Important Cell
Characteristics:
– Impedance
– Cell Temperature
• PowerPump Technology Transfers Charge
Efficiently From Cell to Cell During All
Operating Conditions, Resulting in Longer
Run Time and Cell Life
– Includes User-Configurable PowerPump
Cell-Balancing Modes
• High-Resolution 18-Bit Integrating Delta-Sigma
Coulomb Counter for Precise Charge-Flow
Measurements and Gas Gauging
• Multiple Independent Δ-Σ ADCs: One-per-Cell
Voltage, Plus Separate Temperature, Current,
and Safety
• Simultaneous, Synchronous Measurement of
Pack Current and Individual Cell Voltages
• Very Low Power Consumption
– < 400 μA Active, < 185 μA Standby, < 85 μA
Ship, and < 1 μA Undervoltage Shutdown
• Accurate, Advanced Temperature Monitoring
of Cells and MOSFETs With up to 4 Sensors
• Fail-Safe Operation of Pack Protection
Circuits: Up to Three Power MOSFETs and
One Secondary Safety Output (Fuse)
• Fully Programmable Voltage, Current, Balance,
and Temperature-Protection Features
• External Inputs for Auxiliary MOSFET Control
• Smart Battery System 1.1 Compliant via
SMBus
APPLICATIONS
• Portable Medical Instruments and Test
Equipment
• Mobility Devices (E-Bike)
• Uninterruptible Power Supplies and Hand-Held
Tools
DESCRIPTION
The bq78PL116 master gateway battery controller is
part of a complete Li-Ion control, monitoring, and
safety solution designed for large series cell strings.
The bq78PL116 along with bq76PL102 PowerLAN™
dual-cell monitors provide complete battery-system
control, communications, and safety functions for a
structure of three up to 16 series cells. This
PowerLAN system provides simultaneous,
synchronized voltage and current measurements
using one A/D per-cell technology. This eliminates
system-induced noise from measurements and allows
the precise, continuous, real-time calculation of cell
impedance under all operating conditions, even
during widely fluctuating load conditions.
PowerPump technology transfers charge between
cells to balance their voltage and capacity. Balancing
is possible during all battery modes: charge,
discharge, and rest. Highly efficient charge-transfer
circuitry nearly eliminates energy loss while providing
true real-time balance between cells, resulting in
longer run-time and improved cycle life.
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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.
PowerLAN, PowerPump, bqWizard are trademarks of Texas Instruments.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
© 2010–2011, Texas Instruments Incorporated