L9963E-TR

L9963E-TR is a li-ion battery monitoring and protecting chip for high-reliability automotive applications and energy storage systems. Up to 14 stacked battery cells can be monitored to meet the requirements of 48V 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 L9963E 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 control.

• Measures 4 to 14 cells in series, with 0 µs desynchronization delay between samples
• Coulomb counter supporting pack overcurrent detection in both ignition on and off states
• 16-bit voltage ADC with maximum error of ±2mV in the [0.5 – 4.3]V range, after soldering
• 200 mA passive internal balancing current for each cell in both normal and silent-balancing mode
• Fully redundant cell measurement path, with ADC swap
• Intelligent diagnostic routine providing automatic failure validation
• Two 5V regulators supporting external load connection with 25mA (VCOM) and 50mA (VTREF) current
• 9 GPIOs, with up to 7 analogue inputs for NTC sensing
• Full ISO26262 compliant, ASIL-D systems ready
• Available in 64 pin LQFP package, AEC-Q100 qualified