Overview
The L9963-TR, produced by STMicroelectronics, is a sophisticated Li-ion battery monitoring and protection IC designed for high-reliability automotive applications and energy storage systems. This chip is engineered to monitor and manage battery packs with up to 14 cells in series, ensuring precise and reliable operation. It is AEC-Q100 qualified and fully compliant with ISO26262, making it suitable for ASIL-D systems. The L9963-TR is packaged in a TQFP64EP and is RoHS compliant.
Key Specifications
| Parameter | Specification |
|---|---|
| Status | NRND (Not Recommended for New Design) |
| Package | TQFP64EP |
| Cells Monitored | 4 to 14 cells in series |
| Voltage Measurement Accuracy | ±2 mV in the 1.7 – 4.7 V range |
| Communication Interface | 2.66 Mbps isolated serial communication, SPI, and dual access ring |
| Isolation | Supports both transformer and capacitive based isolation |
| Balancing Current | 200 mA passive internal balancing current per cell |
| Regulators | Two 5 V regulators with 25 mA (VCOM) and 50 mA (VTREF) current capability |
| GPIOs | 9 GPIOs, with up to 7 analog inputs for NTC sensing |
| Compliance | AEC-Q100 qualified, ISO26262 compliant, ASIL-D systems ready |
Key Features
- Fully redundant cell measurement path with ADC Swap for enhanced safety and limp home functionality.
- Intelligent diagnostic routine providing automatic failure validation and redundant fault notification.
- Coulomb counter supporting pack overcurrent detection in both ignition on and off states.
- Robust hot-plug performance without the need for Zeners in parallel to each cell.
- Manual/Timed balancing on multiple channels simultaneously; Internal/External balancing.
- Support for cyclic wake-up measurements to reduce current consumption.
- Nine GPIOs with up to 7 analog inputs for NTC sensing.
Applications
- Automotive: 48 V and high-voltage battery packs for ICE, HEV, and EV applications.
- Backup energy storage systems and UPS.
- E-bikes and e-scooters.
- Portable and semi-portable equipment.
Q & A
- What is the L9963-TR used for?
The L9963-TR is a Li-ion battery monitoring and protection IC used in high-reliability automotive applications and energy storage systems.
- How many cells can the L9963-TR monitor?
The L9963-TR can monitor up to 14 cells in series.
- What is the accuracy of the voltage measurement?
The voltage measurement accuracy is ±2 mV in the 1.7 – 4.7 V range.
- What communication interfaces does the L9963-TR support?
The L9963-TR supports 2.66 Mbps isolated serial communication, SPI, and dual access ring.
- Is the L9963-TR RoHS compliant?
- What kind of balancing does the L9963-TR support?
The L9963-TR supports 200 mA passive internal balancing current per cell in both normal and silent-balancing mode.
- Does the L9963-TR have redundant fault notification?
- What are the applications of the L9963-TR?
The L9963-TR is used in automotive 48 V and high-voltage battery packs, backup energy storage systems, e-bikes, e-scooters, and portable equipment.
- Is the L9963-TR compliant with ISO26262?
- Where can I find additional specifications and documents for the L9963-TR?
Additional datasheets, footprints, and schematics for the L9963-TR can be found on the STMicroelectronics website and through authorized distributors like Avnet America.
