L9963 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 onchip coulomb counting.
L9963 Key Features
- AEC-Q100 qualified
- Measures 4 to 14 cells in series, with 0 us desynchronization delay between
- Coulomb counter supporting pack overcurrent detection in both ignition on and
- 16-bit voltage measurement with maximum error of ±2 mV in the [1.7
- 4.7] V
- 2.66 Mbps isolated serial munication with regenerative buffer, supporting
- 200 mA passive internal balancing current for each cell in both normal and silent-balancing mode. Possibility of executi
- 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 Glo
- Two 5 V regulators supporting external load connection with 25 mA (V) and 50 mA (VTREF) current capability