L9963E
Automotive chip for battery management applications
76
Li-ion battery monitoring and protection chip, up to 14 stacked cells and
daisy chain up to 31 ICs: modular approach from 48V to 800V battery
Features
Protections
• Fully redundant cell measurement
path, with ADC Swap, for enhanced
safety and limp home functionality
• The device can monitor up to 7
NTCs
Electrical parameters
• Measures 4 to 14 cells in series, no
desynchronization delay between
samples
• 16-bit voltage measurement with
maximum error of ±2 mV in the 1.7-4.7V
range, in whole operating temp range
• 18-bit current measurement with +/-0.5%
sense error accuracy
Outputs
• 2.66 Mbps isolated serial communication
with regenerative buffer, supporting dual
access ring
• Cells voltage conversion and
Synchronized current measurement with
coulomb counter
• Single or multiple channel cell balancing
simultaneously
Diagnostics
• Intelligent diagnostic routine
providing automatic failure
validation.
• Redundant fault notification through
both SPI Global Status Word
(GSW) and dedicated FAULT line