Texas Instruments bq7790x可堆叠锂离子电池保护器IC
Texas Instruments bq7790x 3至5系列可堆叠锂离子电池保护器IC是低功耗电池组保护器，实现一整套电压、电流和温度保护。这些保护无需微控制器 (MCU) 控制即可实现。保护阈值和延迟均为出厂编程设定，有多种配置可供选用。提供放电（OTD 和 UTD）和充电（OTC 和 UTC）的单独过温和欠温阈值，以增加灵活性。这些器件通过集成的独立CHG和DSG低侧NMOS FET驱动器实现成组保护，这些驱动器可通过两个控制引脚禁用。
特性
- Voltage protection (accuracy ±10mV)
- 3V to 4.575V overvoltage
- 1.2V to 3V undervoltage
- Open cell and open-wire detection (OW)
- Current protection
- Overcurrent discharge 1: –10mV to –85mV
- Overcurrent discharge 2: –20mV to 170mV
- Short circuit discharge: –40mV to 340mV
- Accuracy ±20% for ≤20mV, ±30% for >20mV across full temperature
- Temperature protection
- Overtemperature charge: 45°C or 50°C
- Overtemperature discharge: 65°C or 70°C
- Undertemperature charge: –5°C or 0°C
- Undertemperature discharge: –20°C or –10°C
- Additional features
- Independent Charge (CHG) and Discharge (DSG) FET drivers
- 36V absolute maximum rating per cell input
- Built-in-self-test functions for high reliability
- SHUTDOWN mode (0.5µA maximum)
- Functional Safety-Capable
- Documentation available to aid functional safety system design
应用
- Power tools, garden tools
- Start-stop battery packs
- Lead-acid (PbA) replacement batteries
- Light electric vehicles
- Energy storage systems, Uninterruptible Power Supplies (UPS)
- 10.8V to 72V packs
视频
Block Diagram
Evaluation Module
Texas Instruments bq77905EVM-707 评估模块 (EVM)
旨在有助于评估低功耗电池保护器 IC bq77905 的性能。
发布日期: 2016-07-22
| 更新日期: 2022-03-11