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  • The L9963 is a Li-ion battery monitoring and protection chip for high-reliability automotive applications and energy storage systems. Up to 14 stacked battery cells can be monitored to meet the requirements of 48 V and higher voltage systems.

    Each cell voltage is measured with high accuracy, as well as the current for the on-chip coulomb counting. The device can monitor up to 7 NTCs. The information is transmitted through SPI communication or isolated interface.
    Multiple L9963 can be connected in a daisy chain and communicate with one host processor via the transformer isolated interfaces, featuring high-speed, low EMI, long distance, and reliable data transmission.
    Passive balancing with programmable channel selection is offered in both normal and low power mode (silent balance). The balancing can be terminated automatically based on internal timer interrupt. Nine GPIOs are integrated for external monitoring and controlling. The L9963 features a comprehensive set of fault detection and notification functions to meet the safety standard requirements.

    Key Features

    • AEC-Q100 qualified
    • Measures 4 to 14 cells in series, with 0 us desynchronization delay between samples. Supports also busbar connection without altering cell results
    • Coulomb counter supporting pack overcurrent detection in both ignition on and off states. Fully synchronized current and voltage samples
    • 16-bit voltage measurement with maximum error of ±2 mV in the [1.7 – 4.7] V range, in whole operating temp range
    • 2.66 Mbps isolated serial communication with regenerative buffer, supporting dual access ring. Less than 2 µs latency between start of conversion of the 1st and the 15th device in a chain. Less than 4 ms to convert and read 96 cells in a system using 8 L9963. Supports both transformer and capacitive based isolation
    • 200 mA passive internal balancing current for each cell in both normal and silent-balancing mode. Possibility of executing cyclic wake-up measurements. Manual/Timed balancing, on multiple channels simultaneously; Internal/external balancing
    • Fully redundant cell measurement path, with ADC Swap, for enhanced safety and limp home functionality
    • Intelligent diagnostic routine providing automatic failure validation. Redundant fault notification through both SPI Global Status Word (GSW) and dedicated FAULT line
    • Two 5 V regulators supporting external load connection with 25 mA (VCOM) and 50 mA (VTREF) current capability
    • 9 GPIOs, with up to 7 analog inputs for NTC sensing
    • Robust hot-plug performance. No Zeners needed in parallel to each cell
    • Full ISO26262 compliant, ASIL-D systems ready
    • TQFP64EP package

Recommended for you

Related Applications

Body and Convenience

Evaluation Tools

    • Part Number

      L9963 Evaluation/Development Board: to be used with an external user MCU for evaluation or development purpose

      L9963 Evaluation Board with on board MCU with preloaded firmware (GUI)

      L9963 Evaluation Board Node: to be used with EVAL-L9963-MCU/EVAL-L9963 and/or stacked with additional EVAL-L9963-NDS

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DB4045
      Automotive chip for battery management applications
      1.0
      434.2 KB
      PDF
      DB4045

      Automotive chip for battery management applications

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
L9963
Active
TQFP 64 10x10x1.0 Automotive Ecopack2
L9963-TR
Active
TQFP 64 10x10x1.0 Automotive Ecopack2

L9963

Package:

TQFP 64 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TQFP 64 10x10x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

L9963-TR

Package:

TQFP 64 10x10x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

TQFP 64 10x10x1.0

Grade

Automotive

RoHS Compliance Grade

Ecopack2

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
Package
Packing Type
Temperature (°C) ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
min
max
L9963-TR Available at 5 distributors

Distributor availability ofL9963-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 80 1 Order Now
AVNET AMERICA 4000 0 Order Now
ARROW AMERICA 100 1000 Order Now
MOUSER WORLDWIDE 172 1 Order Now
RUTRONIK EUROPE 20 1000 Order Now

Distributor reported inventory date: 2020-07-09

Distributor Name

DIGIKEY

Stock

80

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

4000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

100

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

172

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

20

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-09

Buy now
Active
TQFP 64 10x10x1.0 Tape And Reel - - EAR99 MALAYSIA 11.6 / 1k
L9963 No availability of distributors reported, please contact our sales office
Active
TQFP 64 10x10x1.0 Tray - - EAR99 MALAYSIA 11.6 / 1k

L9963-TR

Marketing Status

Active

Unit Price (US$)

11.6

Budgetary Price (US$)*/Qty

11.6 / 1k

Distributor availability ofL9963-TR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 80 1 Order Now
AVNET AMERICA 4000 0 Order Now
ARROW AMERICA 100 1000 Order Now
MOUSER WORLDWIDE 172 1 Order Now
RUTRONIK EUROPE 20 1000 Order Now

Distributor reported inventory date: 2020-07-09

Distributor Name

DIGIKEY

Stock

80

Min.Order

1

Region

WORLDWIDE Order Now

AVNET

Stock

4000

Min.Order

0

Region

AMERICA Order Now

ARROW

Stock

100

Min.Order

1000

Region

AMERICA Order Now

MOUSER

Stock

172

Min.Order

1

Region

WORLDWIDE Order Now

RUTRONIK

Stock

20

Min.Order

1000

Region

EUROPE Order Now

Distributor reported inventory date: 2020-07-09

Package

TQFP 64 10x10x1.0

Packing Type

Tape And Reel

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

Country of Origin

MALAYSIA

L9963

Marketing Status

Active

Unit Price (US$)

11.6

Budgetary Price (US$)*/Qty

11.6 / 1k

Package

TQFP 64 10x10x1.0

Packing Type

Tray

Operating Temperature (°C)

(min)

-

(max)

-

ECCN (US)

EAR99

Country of Origin

MALAYSIA

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors