STMicroelectronics L9963F automotive grade battery management chip has all the functions required for lithium battery pack management systems in hybrid and pure electric vehicles, and is also suitable for industrial energy storage systems and 48V and 96V electric equipment.
L9963F is an enhanced version of STMicroelectronics' mature mass-produced L9963E. Existing users of the L9963 series can directly replace L9963E with L9963F without changing software or hardware.
A single chip can monitor 4 to 14 series connected cells, suitable for systems up to 48V. After cascading multiple chips, up to 31 battery packs and 434 series connected cells can be monitored.
The power metering function of L9963F can detect whether the battery pack experiences overcurrent during vehicle start-up and shutdown. The fully redundant battery cell detection path enhances battery safety through ADC exchange function and supports vehicle limp return function.
L9963F takes power from the tested battery and integrates circuits such as voltage regulators and bootstrap diodes to generate a stable internal reference voltage, ensuring detection accuracy. The chip supports a maximum cell balancing current of 200mA, which helps protect battery health; After L9963F enters low-power mode, the built-in balanced MOS transistor driver can run for a certain period of time. This static balanced mode can provide protection and minimize battery power consumption.
The chip is equipped with 9 general-purpose input/output pins (GPIO) and a serial peripheral interface (SPI) for monitoring functions, as well as complete fault detection and alarm functions. L9963F complies with ISO 26262 standard and can meet ASIL-D level functional safety application requirements.
L9963F is a current and voltage synchronous sampling device with no asynchronous delay between samples. It integrates a 16 bit voltage analog-to-digital converter and has a maximum error of only ± 2mV within the range of 0.5 V to 4.3 V. Even after cascading multiple chips, the synchronization accuracy remains unchanged. With a 2.66Mbps isolated serial communication interface, the maximum delay between the first and 31st chips in the link is controlled within 4 µ s.
L9963F is now in mass production and comes in a 10mm x 10mm TQFP64 package.
