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FEATURES

APPLICATIONS

DESCRIPTION

bq78PL114

www.ti.com

................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009

PowerLAN™ Master Gateway Battery Management Controller

With PowerPump™ Cell Balancing Technology

– bq78PL114S12: < 300 µ A Active, < 185 µ A

Standby, < 85 µ A Ship, and < 1 µ A

• bq78PL114 Designed for Managing 3- to

Undervoltage Shutdown

8-Series-Cell Battery Systems

• Accurate, Advanced Temperature Monitoring

• bq78PL114S12 Firmware Upgrade Supports 3-

of Cells and MOSFETs With up to 12 Sensors

to 12-Series-Cell Battery Systems

• Fail-Safe Operation of Pack Protection

– Adds Support for LCD and Electronic Paper

Circuits: Up to Three Power MOSFETs and

Displays or EPDs

One Secondary Safety Output (Fuse)

– Configurable for 11-A, 26-A, or 110-A

• Fully Programmable Voltage, Current, Balance,

Operating Currents

and Temperature-Protection Features

• Systems With More Than Four Series Cells

• External Inputs for Auxiliary MOSFET Control

Require External bq76PL102 Dual-Cell

Monitors • Smart Battery System 1.1 Compliant via

SMBus

• SmartSafety Features:

– Prevention: Optimal Cell Management

– Diagnosis: Improved Sensing of Cell

• Portable Medical Instruments and Test

Problems

Equipment

– Fail Safe: Detection of Event Precursors

• Mobility Devices (E-Bike)

• Rate-of-Change Detection of All Important Cell

• Uninterruptible Power Supplies and Hand-Held

Characteristics:

Tools

– Voltage

– Impedance

– Cell Temperature The bq78PL114 master gateway battery controller is

part of a complete Li-Ion control, monitoring, and

• PowerPump Technology Transfers Charge

safety solution designed for large series cell strings.

Efficiently From Cell to Cell During All

Operating Conditions, Resulting in Longer

The bq78PL114 and bq78PL114S12 along with

bq76PL102 PowerLAN™ dual-cell monitors provide

Run Time and Cell Life

complete battery-system control, communications,

– bq78PL114S12 Adds User-Configurable

and safety functions for a structure of three up to

PowerPump Cell-Balancing Modes

twelve series cells. This PowerLAN system provides

• High-Resolution 18-Bit Integrating Delta-Sigma

simultaneous, synchronized voltage and current

Coulomb Counter for Precise Charge-Flow

measurements using one A/D per-cell technology.

Measurements and Gas Gauging

This eliminates system-induced noise from

measurements and allows the precise, continuous,

• Multiple Independent Δ - Σ ADCs: One-per-Cell

real-time calculation of cell impedance under all

Voltage, Plus Separate Temperature, Current,

operating conditions, even during widely fluctuating

and Safety

load conditions.

• Simultaneous, Synchronous Measurement of

PowerPump technology transfers charge between

Pack Current and Individual Cell Voltages

cells to balance their voltage and capacity. Balancing

• Very Low Power Consumption

is possible during all battery modes: charge,

– bq78PL114: < 250 µ A Active, < 150 µ A

discharge, and rest. Highly efficient charge-transfer

Standby, < 40 µ A Ship, and < 1 µ A

circuitry nearly eliminates energy loss while providing

true real-time balance between cells, resulting in

Undervoltage Shutdown

longer run-time and improved cycle life.

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 PowerLAN, PowerPump, bqWizard are trademarks of Texas Instruments.

3 All other trademarks are the property of their respective owners.

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.

Summary of content (32 pages)

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bq78PL114 www.ti.com................................................................................................................................................
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.
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bq78PL114 www.ti.com................................................................................................................................................
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.
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bq78PL114 www.ti.com................................................................................................................................................
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bq78PL114 B0332-02 Pack Positive SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.
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bq78PL114 www.ti.com................................................................................................................................................
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com bq78PL114 TERMINAL FUNCTIONS (continued) NAME NO.
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bq78PL114 www.ti.com................................................................................................................................................
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com bq78PL114S12 TERMINAL FUNCTIONS (continued) NO.
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bq78PL114 www.ti.com................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) RANGE UNITS TA Operating free-air temperature (ambient) –40 to 85 °C Tstg Storage temperature –65 to 150 °C V4–V3 Maximum cell voltage –0.5 to 5.0 V V3–V2 Maximum cell voltage –0.5 to 5.
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.
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bq78PL114 www.ti.com................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 Current-Sense Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS Measurement range (1) (bq78PL114) MIN TYP MAX UNIT –0.2 0.2 V Measurement range (2) (bq78PL114S12, 3-mΩ sense resistor) –0.077 0.
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com LDO Voltage Characteristics (1) over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TA = –40C to 85C, load = 200 µA 2.425 2.5 2.575 V 2.425 2.5 2.
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bq78PL114 www.ti.com................................................................................................................................................
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com FEATURE SET Primary (First-Level) Safety Features The bq78PL114 implements a breadth of system protection features which are easily configured by the customer. First-level protections work by controlling the MOSFET switches.
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bq78PL114 www.ti.com................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 • • The bq78PL114S12 drives a three- to five-segment static liquid-crystal display. The bq78PL114S12 drives a three- to five-segment electronic paper display. An external 15-V voltage source is required. E Ink Corporation supplies this type of display.
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com measured by up to four additional external temperature sensors. With the bq78PL114S12 firmware upgrade, up to eight more are available in remote bq76PL102 dual-cell battery monitors. Coulomb counting is captured continuously by a dedicated 18-bit integrating delta-sigma ADC in the bq78PL114.
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bq78PL114 www.ti.com................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 Outputs Charge Control The CHG and PRE outputs are ordinarily used to drive MOSFET transistors controlling charge to the cell stack. Charge or precharge mode is selected based on the present cell voltage compared to the user-definable cell precharge, undervoltage, and temperature thresholds.
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.com Inputs Current Measurement Current is monitored by four separate ADCs. All use the same very low-value sense resistor, typically 10, 5, 3, or 1 milliohms in series with the pack negative connection. CCBAT and CCPACK connections to the sense resistor use an R/C filter for noise reduction.
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bq78PL114 www.ti.com................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 COMMUNICATIONS SMBus The bq78PL114 uses the industry-standard Smart Battery System’s two-wire System Management Bus (SMBus) communications protocol for all external communication. SMBus version 2.
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.
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bq78PL114 www.ti.com................................................................................................................................................
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+ - + - + - CELL1 CELL2 CELL3 C2 22uF C1 22uF MA21D3800L 2K R10 D10 D9 MA21D3800L 4.7uH L1 D5 MA21D3800L 2K R9 R30 R29 20K 20K FDC6327C Q1-A FDC6327C Q1-B 20K 20K FDC6327C Q2-A FDC6327C Q2-B R11 R12 Keep this connection to BATT- as short and Low Z as possible. C30 22uF L2 4.7uH D6 MA21D3800L 3300pF C13 3300pF C12 3300pF C15 3300pF C14 10uF C5 VLDO1 BZT52C12-7-F 12.0 VDC Q8 560K R40 200K R41 0.1uF C38 VSS 0.
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CELL1 CELL2 CELL3 CELL4 CELL5 CELL6 CELL7 CELL8 CELL9 CELL10 - + CELL1 - + CELL2 - + CELL3 - + CELL4 - + CELL5 - + CELL6 - + CELL7 - + CELL8 - + CELL9 - + CELL10 C51 10uF C53 10uF C54 10uF C94 10uF C29 10uF P6N P6S P5N P5S P8N P8S P7N P7S P10S P9N P9S C95 10uF 8 7 6 5 15 12 8 7 6 5 15 12 8 7 6 5 15 12 P2N P2S P1N P1S V1 13 14 13 14 13 0.01uF C48 N/C 3 N/C 10 N/C 11 16 VPP 2 VLDO T2 T1 9 0.01uF C10 N/C 3 N/C 10 N/C 11 16 VPP 2 VLDO T2 T1 9 0.
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CELL8 CELL9 CELL10 C1 22uF C13 22uF C17 22uF L2 2.0K R9 4.7uH L1 2.0K R12 4.7uH D5 D6 D7 D8 R10 R11 R13 R14 20K Q1-A Q1-B 20K 20K Q2-A Q2-B 20K 3300pF C12 3300pF C2 3300pF C15 3300pF C14 P8N P9S P9N P10S Submit Documentation Feedback Product Folder Link(s): bq78PL114 CELL1 CELL2 CELL3 CELL4 CELL5 CELL6 CELL7 22uF C90 22uF C91 C67 22uF C70 22uF C73 22uF C76 22uF VSS C62 22uF 2.0K R2 4.7uH L8 2.0K R8 4.7uH L9 2.0K R23 4.7uH L10 2.
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bq78PL114 www.ti.com................................................................................................................................................ SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009 100Ω 1µF 25V 1µF 25V 1 1µF 25V 1 2 3 3 BAT54STA 1 2 3 BAT54STA 1µF 25V 2 BAT54STA 1µF 25V 4.
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bq78PL114 SLUS850B – SEPTEMBER 2008 – REVISED APRIL 2009................................................................................................................................................ www.ti.
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PACKAGE OPTION ADDENDUM www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.