L9963-TR - Automotive Battery Monitoring IC | STMicroelectronics
料号： L9963-TR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $12.5 | $12.50 |
| 10 | $11.25 | $112.50 |
| 100 | $10 | $1,000.00 |
| 500 | $9 | $4,500.00 |
| 1,000 | $8.1 | $8,100.00 |
L9963-TR 概述
A battery monitoring IC (BMIC) is a specialized analog front-end that measures the voltage of each cell in a battery pack, monitors temperature, and controls balancing to ensure safe and efficient operation. It sits between the battery cells and the host microcontroller, converting analog cell voltages into digital data via an ADC and communicating over a serial interface. In the system hierarchy, the BMIC is part of the battery management system (BMS), which is a critical subsystem in automotive power electronics.
Key features of the L9963-TR include 14-cell voltage measurement capability, a 16-bit ADC with high accuracy, and a built-in passive balancing function with up to 150 mA balancing current. It supports both SPI and daisy-chain communication, enabling scalable battery packs. The device operates over a wide supply voltage range and includes comprehensive diagnostic features such as overvoltage, undervoltage, and temperature monitoring, making it suitable for ISO 26262 functional safety applications.
The L9963-TR is built on STMicroelectronics' robust automotive process technology, ensuring high reliability across the -40°C to +125°C temperature range. Its architecture includes a precision voltage reference, a multiplexed ADC, and a state machine for balancing control. The daisy-chain interface allows multiple devices to be connected in series, reducing wiring complexity in high-voltage battery packs.
Typical applications include battery management systems for EVs, HEVs, and industrial energy storage. The device is also used in 48V mild-hybrid systems and backup power supplies. Its high accuracy and safety features make it ideal for applications where cell voltage monitoring is critical for battery longevity and safety.
When designing with the L9963-TR, ensure proper PCB layout for the analog measurement paths to minimize noise, and use appropriate filtering on the cell inputs. The device requires careful thermal management when balancing current is high, and the SPI interface should be isolated if the host controller is not on the same ground reference.
直接替换替代料： L9963-TR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： L9963-TR （相同外形与封装尺寸） ——差异在于 Number of Cells, Package, RoHS Status, Automotive Grade, Balancing Current.
快速对比工具——选择替代料号进行并排对比：
L9963
✅ 直接替换✓ 有现货
$8.1 / 个
查看数据手册 →ADBMS1818
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
BQ79614
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
L9963-TR 规格参数
| Number of Cells | 14 |
| ADC Resolution | 16-bit |
| Cell Voltage Measurement Accuracy | ±2 mV (typical) |
| Balancing Current | 150 mA (max) |
| Communication Interface | SPI, Daisy-chain |
| Supply Voltage Range | 6 V to 78 V |
| 工作温度范围 | -40°C to +125°C |
| 封装 | TQFP-64 |
| 安装类型 | Surface Mount |
| Functional Safety | ISO 26262 ASIL-D |
| Diagnostics | Overvoltage, Undervoltage, Temperature |
| Cell Input Range | 0 V to 5 V |
| RoHS 状态 | Compliant |
| AEC-Q100 | Qualified |
L9963-TR 引脚配置
| 引脚 1 | VDD — Power supply |
| 引脚 2 | VSS — Ground |
| 引脚 3 | C1 — Cell 1 voltage input |
| 引脚 4 | C2 — Cell 2 voltage input |
| 引脚 5 | C3 — Cell 3 voltage input |
| 引脚 6 | C4 — Cell 4 voltage input |
| 引脚 7 | C5 — Cell 5 voltage input |
| 引脚 8 | C6 — Cell 6 voltage input |
| 引脚 9 | C7 — Cell 7 voltage input |
| 引脚 10 | C8 — Cell 8 voltage input |
| 引脚 11 | C9 — Cell 9 voltage input |
| 引脚 12 | C10 — Cell 10 voltage input |
| 引脚 13 | C11 — Cell 11 voltage input |
| 引脚 14 | C12 — Cell 12 voltage input |
| 引脚 15 | C13 — Cell 13 voltage input |
| 引脚 16 | C14 — Cell 14 voltage input |
| 引脚 17 | TS1 — Temperature sensor input 1 |
| 引脚 18 | TS2 — Temperature sensor input 2 |
| 引脚 19 | TS3 — Temperature sensor input 3 |
| 引脚 20 | TS4 — Temperature sensor input 4 |
| 引脚 21 | SPI_CS — SPI chip select |
| 引脚 22 | SPI_SCK — SPI clock |
| 引脚 23 | SPI_SDI — SPI data in |
| 引脚 24 | SPI_SDO — SPI data out |
| 引脚 25 | DCH — Daisy-chain high |
| 引脚 26 | DCL — Daisy-chain low |
| 引脚 27 | BAL — Balancing control |
| 引脚 28 | NTC — NTC thermistor input |
典型应用
L9963-TR 适用于 6 应用s: Electric Vehicle Battery Management, Hybrid Electric Vehicle Battery Management, Energy Storage Systems, 48V Mild-Hybrid Systems, Backup Power Supplies, Industrial Battery Monitoring.
Electric Vehicle Battery Management
The L9963-TR is used in EV battery management systems to monitor cell voltages and temperatures, ensuring safe and efficient operation. Its 14-cell capability and high accuracy (±2 mV) enable precise state-of-charge estimation, extending battery life. The device communicates via SPI or daisy-chain, allowing scalable packs. In a typical EV BMS, the L9963-TR is placed on the battery pack's cell monitoring board, connected to the battery cells and a host MCU. It measures each cell voltage and temperature, and controls passive balancing. The daisy-chain interface reduces wiring complexity in high-voltage packs. Performance considerations include thermal management during balancing and ensuring accurate voltage measurement for safety.
推荐
Hybrid Electric Vehicle Battery Management
In HEVs, the L9963-TR monitors the high-voltage battery pack, providing accurate cell voltage and temperature data to the BMS. Its wide supply range (6V to 78V) accommodates various pack configurations. The device's ISO 26262 ASIL-D support ensures functional safety in critical automotive systems. The L9963-TR is integrated into the BMS PCB, interfacing with the battery cells and the vehicle's control unit. It performs cell balancing and diagnostics, contributing to battery longevity and safety. Performance considerations include minimizing measurement noise and ensuring reliable communication in the automotive environment.
推荐
Energy Storage Systems
The L9963-TR is used in stationary energy storage systems to monitor large battery banks. Its 14-cell monitoring capability and daisy-chain interface allow scaling to hundreds of cells. The device's high accuracy and diagnostics ensure safe operation and optimal performance. In an ESS, the L9963-TR is placed on cell monitoring boards, communicating with a central BMS controller. It measures cell voltages and temperatures, and controls balancing. Performance considerations include managing communication latency and ensuring accurate measurement over long distances.
推荐
48V Mild-Hybrid Systems
The L9963-TR is suitable for 48V mild-hybrid systems, monitoring the 48V lithium-ion battery pack. Its supply voltage range (6V to 78V) covers the 48V pack voltage, and its 14-cell capability matches typical 48V pack configurations. The device's automotive qualification and functional safety support make it ideal for this application. In a 48V mild-hybrid system, the L9963-TR is integrated into the BMS, measuring cell voltages and temperatures, and controlling balancing. Performance considerations include ensuring accurate measurement under high vibration and temperature extremes.
推荐
Backup Power Supplies
The L9963-TR is used in backup power supplies to monitor battery banks, ensuring reliable operation during power outages. Its high accuracy and diagnostics help maintain battery health and predict failures. The device's daisy-chain interface allows monitoring of large battery banks with minimal wiring. In a backup power supply, the L9963-TR is placed on the battery monitoring board, communicating with the system controller. It measures cell voltages and temperatures, and controls balancing. Performance considerations include ensuring reliable operation over long periods and accurate measurement for battery health assessment.
推荐
Industrial Battery Monitoring
The L9963-TR is used in industrial battery monitoring systems for forklifts, AGVs, and other equipment. Its robust design and wide temperature range make it suitable for harsh industrial environments. The device's SPI interface allows easy integration with industrial controllers. In an industrial battery monitoring system, the L9963-TR is placed on the battery pack, measuring cell voltages and temperatures, and controlling balancing. Performance considerations include ensuring accurate measurement in noisy industrial environments and managing heat dissipation during balancing.
推荐
推荐产品汇总
工程参考数据： L9963-TR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | L9963 | ADBMS1818 | BQ79614 |
|---|---|---|---|---|
| Package | TQFP-64 | TQFP-64 | TQFP-64 | TQFP-64 |
| Brand | STMicroelectronics | STMicroelectronics | Analog Devices | Texas Instruments |
| Number of Cells | 14 | 14 | 18 | 14 |
| ADC Resolution | 16-bit | 16-bit | 16-bit | 16-bit |
| Balancing Current | 150 mA | 150 mA | 200 mA | 240 mA |
| Communication Interface | SPI, Daisy-chain | SPI, Daisy-chain | SPI, Daisy-chain | SPI, Daisy-chain |
| Supply Voltage Range | 6V to 78V | 6V to 78V | 6V to 80V | 6V to 80V |
| Functional Safety | ISO 26262 ASIL-D | ISO 26262 ASIL-D | ISO 26262 ASIL-D | ISO 26262 ASIL-D |
关键差异点
- 14-cell monitoring with 16-bit ADC （对比 ADBMS1818)
- 150 mA balancing current （对比 BQ79614)
- STMicroelectronics brand and support （对比 ADBMS1818)
设计说明
For accurate cell voltage measurement, use Kelvin connections to the battery cells and place filtering capacitors close to the C1-C14 pins. A 100nF ceramic capacitor on each cell input is recommended to filter high-frequency noise. Ensure the ground plane is solid and the analog ground is separated from digital ground to minimize noise coupling.
During passive balancing, the L9963-TR dissipates power proportional to the balancing current and cell voltage. For example, at 150 mA balancing current and 4V cell voltage, each balancing path dissipates 0.6W. Ensure adequate PCB copper area and thermal vias to dissipate heat, especially when multiple cells are balanced simultaneously.
Do not exceed the maximum supply voltage of 78V. Ensure proper reverse polarity protection on the supply. When using the daisy-chain interface, ensure proper isolation between devices and the host controller. Also, verify that the SPI lines are properly terminated to avoid signal integrity issues.
合规信息
AEC-Q100 qualified per STMicroelectronics. RoHS compliant. REACH compliant.
