L9963E-TR

The L9963E-TR is a reliable solution for battery management in automotive and energy storage applications. With advanced fault detection and notification functions, this chip ensures compliance with safety standards. By enabling multiple L9963E chips to communicate with a host processor via transformer isolated interfaces, the L9963E-TR supports high-speed, low EMI, long-distance data transmission

Key Features

• AEC-Q100 qualified
• Measures 4 to 14 cells in series, with 0 μs 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
• 16-bit voltage ADC with maximum error of ±2 mV in the [0.5 – 4.3] V range, after soldering, in [-40; +105] °C Tj range
• 2.66 Mbps isolated serial communication with regenerative buffer, supporting dual access ring. Less than 4 us latency between start of conversion of the 1st and the 31st device in a chain. Less than 4 ms to convert and read 96 cells in a system using 8 L9963E and L9963T transceiver. Less than 8 ms to convert and read 210 cells in a system using 15 L9963E and L9963T transceiver. Less than 16 ms to convert and read 434 cells in a system using 31 L9963E and L9963T transceiver. Supports both XFMR and CAP based isolation
• 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
• 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 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
• 9 GPIOs, with up to 7 analog inputs for NTC sensing
• Robust hot-plug performance. No Zeners needed in parallel to each cell
• Full ISO26262 compliant, ASIL-D systems ready