Features

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AEC-Q100 qualified

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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

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16-bit voltage measurement with maximum error of ±2 mV in the [1.7 – 4.7] V

range, in whole operating temp range

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2.66 Mbps isolated serial communication with regenerative buffer, supporting

system using 8 L9963. Supports both transformer and capacitive based isolation

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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

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Fully redundant cell measurement path, with ADC Swap, for enhanced safety

and limp home functionality

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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

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9 GPIOs, with up to 7 analog inputs for NTC sensing

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Robust hot-plug performance. No Zeners needed in parallel to each cell

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Full ISO26262 compliant, ASIL-D systems ready

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TQFP64EP package

Application

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48 V and high-voltage battery packs

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Backup energy storage systems and UPS

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E-bikes, e-scooters

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Portable and semi-portable equipment

Description

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.

Product status link

L9963

Product label

Product summary

Order code

Package

Packing

L9963

TQFP64EP

(exposed

pad down)

Tray

Automotive chip for battery management applications

L9963

Data brief

DB4045 - Rev 1 - October 2019

For further information contact your local STMicroelectronics sales office.

www.st.com