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STMicroelectronics L9963-TR
- Part No.:
- L9963-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Battery Management
- Package:
- 64-TQFP Exposed Pad
- Datasheet:
-
L9963-TR.pdf
- Description:
- IC BATT MON LI-ION 4-14CL 64TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
L9963-TR from STMicroelectronics is an AEC-Q100 qualified, ISO 26262 ASIL-D compliant battery monitor IC for automotive and industrial energy storage systems. It measures 4–14 series-connected Li-ion cells with ±2 mV voltage accuracy (1.7–4.7 V), 16-bit resolution, fully synchronized current/voltage sampling, and supports passive balancing up to 200 mA per cell in normal and silent modes. Used in 48 V mild-hybrid battery packs for real-time cell voltage, temperature (via 7 NTC inputs), and coulomb counting.
For engineers reviewing the L9963-TR datasheet, L9963-TR pinout, L9963-TR application, or L9963-TR equivalent, key selection considerations include daisy-chainable isolated SPI (2.66 Mbps), redundant ADC path with swap, dual fault signaling (SPI GSW + dedicated FAULT pins), transformer/capacitive isolation support, and TQFP64EP package thermal performance for high-reliability BMS stacks.
Technical Context
The L9963-TR implements a dual-path, fully redundant cell voltage measurement architecture with ADC swap capability for limp-home operation under fault conditions. Its isolated serial interface uses regenerative buffering to achieve <2 µs latency across 15-device chains and <4 ms full-system readout of 96 cells using eight devices.
It integrates two independent 5 V regulators (VCOM: 25 mA; VTREF: 50 mA), nine GPIOs (seven configurable as analog NTC inputs), and programmable balancing control with automatic termination via internal timer interrupt-enabling precise state-of-charge tracking during ignition-on and ignition-off states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Range | 4–14 series-connected Li-ion cells; enables scalable 48 V to >600 V battery pack monitoring. |
| Voltage Accuracy | ±2 mV over 1.7–4.7 V range, full temperature range; ensures reliable SOC/SOH estimation without calibration drift. |
| ADC Resolution | 16-bit; delivers 15.3 µV LSB for high-fidelity cell voltage discrimination in tight-tolerance packs. |
| Isolated SPI Speed | 2.66 Mbps with regenerative buffer; supports robust, low-EMI daisy-chained communication over >1 m distances. |
| Passive Balancing Current | 200 mA per cell, in both normal and silent mode; enables active charge equalization without external FETs or heatsinks. |
| NTC Inputs | Up to 7 analog channels; allows distributed thermal monitoring across multi-module battery enclosures. |
| Safety Certification | AEC-Q100 Grade 0 (−40°C to +150°C) and ISO 26262 ASIL-D ready; meets functional safety requirements for automotive traction and backup power systems. |
Pinout & Package
Package: TQFP64EP (10 mm × 10 mm × 1 mm, exposed pad down), RoHS-compliant, ECOPACK2 rated, optimized for thermal dissipation in stacked BMS modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCOM | 5 V regulator output | Supplies 25 mA to external logic or level-shifters; decoupled via local 1 µF ceramic capacitor. |
| VTREF | 5 V reference regulator output | Provides stable 50 mA reference for ADC biasing and external sensor excitation. |
| ISOHp / ISOHm | High-side isolated SPI differential pair | Supports transformer-based isolation; enables galvanic separation between host MCU and high-voltage stack. |
| ISOLp / ISOLm | Low-side isolated SPI differential pair | Completes isolated ring topology; allows dual-access daisy chain with <2 µs inter-device skew. |
| GPIO1 / GPIO2 | Dedicated fault outputs | Active-low FAULTH/FAULTL provide redundant hardware-level failure indication per ISO 26262 requirements. |
| GPIO7 | Wake-up input | Enables cyclic wake-up measurements during sleep mode to monitor open-circuit voltage drift without full system power-up. |
Key Features
| Feature | Design Value |
|---|---|
| Fully redundant ADC path with swap | Enables continuous cell monitoring during single-point ADC failure-critical for ASIL-D limp-home operation. |
| Programmable passive balancing | Per-cell balancing activation with auto-termination via internal timer; eliminates need for external balancing controllers. |
| Integrated dual 5 V regulators | VCOM (25 mA) and VTREF (50 mA) reduce external power components and improve BOM simplicity in compact BMS designs. |
| Hot-plug robustness | No external Zener diodes required per cell; simplifies PCB layout and improves reliability during module replacement or service. |
| Intelligent diagnostic routine | Automated validation of open-wire, short-circuit, overvoltage, undervoltage, and thermal faults with dual notification paths. |
Applications
| 48 V Mild-Hybrid Vehicles | Industrial UPS Systems |
|---|---|
Use Scenario: Monitoring 12-cell 48 V LiFePO₄ battery in start-stop and regenerative braking circuits. IC Role / Device Role / Timing Role: Primary cell voltage/current monitor and coulomb counter; synchronizes sampling with vehicle ECU timing signals. Use Value: Enables accurate state-of-charge tracking during engine-off periods and supports predictive maintenance via long-term voltage drift analysis. | Use Scenario: Real-time health monitoring of 14-cell backup battery string in telecom central office UPS. IC Role / Device Role / Timing Role: High-accuracy voltage supervisor with redundant fault reporting; interfaces to PLC via isolated SPI ring. Use Value: Reduces false trip events through dual FAULT line + SPI GSW cross-validation, extending mean time between failures by >3× vs. single-path monitors. |
| E-Bike Battery Packs | Portable Energy Storage Units |
Use Scenario: Compact 10-cell Li-ion pack with integrated NTC sensing and balancing for Class 3 e-bikes. IC Role / Device Role / Timing Role: Standalone BMS front-end; performs periodic wake-up measurements during storage to prevent over-discharge. Use Value: Silent balancing mode maintains cell balance at <10 µA quiescent current-extending shelf life without user intervention. | Use Scenario: Modular 48 V/2 kWh portable generator with hot-swappable battery modules. IC Role / Device Role / Timing Role: Module-level monitor enabling plug-and-play identification and health reporting via daisy-chained isolated interface. Use Value: Transformer-isolated ring topology supports >10 m cable runs between modules while maintaining <4 ms total conversion/readout latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery monitor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7695200RSMR | Higher integration (integrated LDO, charge pump); lower max cell count (16 vs. 14); no isolated SPI ring support. | Targeted at cost-sensitive consumer-grade e-scooters; lacks ASIL-D certification and dual fault signaling. | Select when system-level isolation is handled externally and functional safety compliance is not required. |
| MAX17853GCM+ | Capacitive isolation only; supports up to 16 cells; no integrated balancing drivers; requires external FETs for balancing. | Used in aerospace and defense where radiation tolerance is prioritized over automotive qualification. | Choose when capacitive isolation suffices and board space permits discrete balancing circuitry. |
Compared with BQ7695200RSMR and MAX17853GCM+, the L9963-TR uniquely combines ASIL-D readiness, transformer-capable isolated ring topology, on-chip 200 mA balancing, and dual fault signaling-making it the only option qualified for production automotive 48 V BMS front-ends requiring zero single-point failure paths.
Availability
L9963-TR is available at Aetrix Electronics and suitable for 48 V mild-hybrid vehicles, industrial uninterruptible power supplies, and portable energy storage units requiring stable component supply, long-lifecycle availability, and automotive-grade traceability.
Supply support for L9963-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade analog products.
The L9963-TR belongs to ST's Automotive Power Discrete and Analog portfolio, engineered specifically for functional-safety-critical battery monitoring in ASIL-D compliant electric and hybrid vehicle architectures.
FAQ
What isolation methods does the L9963-TR support?
The L9963-TR supports both transformer-based and capacitive-based isolated serial communication. Its regenerative buffer enables daisy-chained ring topologies with <2 µs latency between first and fifteenth device, and it complies with IEC 61000-4-5 surge immunity standards for automotive environments.
Does the L9963-TR require external balancing FETs?
No. The L9963-TR integrates internal 200 mA passive balancing drivers per cell, eliminating the need for external MOSFETs or driver circuitry. Balancing can be activated manually or timed, and terminates automatically based on internal timer interrupt or voltage threshold crossing.
How many NTC sensors can the L9963-TR monitor simultaneously?
The L9963-TR supports up to seven analog NTC inputs via its configurable GPIOs. Each input is routed through a dedicated 16-bit ADC channel with programmable gain and offset correction, enabling accurate temperature profiling across large-format battery modules.
Is the L9963-TR pin-compatible with earlier ST battery monitors like L9960?
No. The L9963-TR uses a unique TQFP64EP footprint with distinct pin assignments-including dedicated ISOHp/ISOHm and ISOLp/ISOLm differential pairs, dual FAULT outputs, and separate VCOM/VTREF regulators-not present in L9960. Migration requires PCB redesign and firmware adaptation.
L9963-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 64-TQFP Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Monitor
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 4 ~ 14
- Fault Protection:
- Over Current
- Interface:
- SPI
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFP-EP (10x10)
L9963-TR FAQ
1.How can I place an order for L9963-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for L9963-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for L9963-TR reliable?
The price and inventory of L9963-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9963-TR is usually 5 days.
3.What payment methods are accepted for L9963-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9963-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for L9963-TR?
L9963-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your L9963-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for L9963-TR?
For technical support, including L9963-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9963-TR requirements.
6.How does Aetrix verify that L9963-TR is sourced from the original manufacturer or authorized distributors?
All L9963-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that L9963-TR meets industry standards.
7.What is the process for return or replacement of L9963-TR?
All L9963-TR units undergo pre-shipment inspection (PSI). If there is an issue with L9963-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The L9963-TR part is unused and in its original packaging.
Return procedure for L9963-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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