Texas Instruments bq7790x Stackable Li-Ion Battery Protector ICs
Texas Instruments bq7790x 3-to-5 Series Stackable Li-Ion Battery Protector ICs are low-power battery pack protectors that implement a suite of voltage, current, and temperature protections. These protections are all done without microcontroller (MCU) control. Protection thresholds and delays are factory-programmed and available in a variety of configurations. Separate over temperature and under temperature thresholds for discharge (OTD and UTD) and charge (OTC and UTC) are provided for added flexibility. The Texas Instruments bq7790x achieve pack protection via the integrated independent CHG and DSG low-side NMOS FET drivers, which may be disabled via two control pins.
Features
- 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
Applications
- 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
Videos
Block Diagram
Evaluation Module
Texas Instruments bq77905EVM-707 Evaluation Module (EVM)
Designed to help evaluate the performance of the bq77905, a low power battery protector IC.
發佈日期: 2016-07-22
| 更新日期: 2022-03-11