Overview
The BQ76930, produced by Texas Instruments, is a robust analog front-end (AFE) device designed for battery management in high-power systems. It is part of the BQ769x0 family, which includes devices for monitoring and protecting battery packs in applications such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ76930 specifically supports up to 10-series cells or typical 36-V packs, making it suitable for a variety of battery chemistries including Li-ion and Li-iron phosphate.
Key Specifications
| Parameter | Description |
|---|---|
| Package | TSSOP-30-4.4mm |
| Pins | 30 |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage Absolute Maximum | Up to 108 V |
| Output Voltage Regulator | 2.5-V or 3.3-V |
| Cell Support | Up to 10-series cells |
| Battery Chemistries | Li-ion, Li-iron phosphate, and more |
| Interface | Simple I2C compatible interface (CRC option) |
| Thermistor Support | Up to three thermistors (103AT) |
Key Features
- AFE Monitoring Features: Pure digital interface, internal ADC measures cell voltage, die temperature, and external thermistor. A separate internal ADC measures pack current (coulomb counter).
- Hardware Protection Features: Overcurrent in Discharge (OCD), Short Circuit in Discharge (SCD), Overvoltage (OV), Undervoltage (UV), and secondary protector fault detection.
- Integrated Cell Balancing FETs: For balancing cell voltages.
- Charge and Discharge FET Drivers: Low-side NCH FET drivers for charge and discharge operations.
- Alert Interrupt: To host microcontroller for critical events.
- No EEPROM Programming Necessary: Pre-configured settings.
- Low Power Mode: Sub-blocks can be enabled or disabled to control chip current consumption; SHIP mode for ultra-low power state.
- Random Cell Connection Tolerant: Flexible connection options.
Applications
- Light Electric Vehicles: Monitoring and protection for battery packs in electric vehicles.
- Power Tools: Battery management for high-power tools.
- Uninterruptible Power Supplies (UPS): Ensuring reliable power supply through advanced battery monitoring and protection.
- Other High-Power Systems: Suitable for various high-power applications requiring robust battery management.
Q & A
- What is the BQ76930 used for?
The BQ76930 is used for monitoring and protecting battery packs in high-power systems such as light electric vehicles, power tools, and uninterruptible power supplies.
- How many series cells does the BQ76930 support?
The BQ76930 supports up to 10-series cells or typical 36-V packs.
- What types of battery chemistries can the BQ76930 manage?
The BQ76930 can manage a variety of battery chemistries including Li-ion and Li-iron phosphate.
- What interface does the BQ76930 use for communication?
The BQ76930 uses a simple I2C compatible interface with a CRC option.
- Does the BQ76930 require EEPROM programming?
No, the BQ76930 does not require EEPROM programming as it comes pre-configured.
- What are the key hardware protection features of the BQ76930?
The key hardware protection features include Overcurrent in Discharge (OCD), Short Circuit in Discharge (SCD), Overvoltage (OV), Undervoltage (UV), and secondary protector fault detection.
- How does the BQ76930 manage cell balancing?
The BQ76930 includes integrated cell balancing FETs to balance cell voltages.
- What is the operating temperature range of the BQ76930?
The operating temperature range of the BQ76930 is -40°C to 85°C.
- Can the BQ76930 support multiple thermistors?
Yes, the BQ76930 can support up to three thermistors (103AT).
- How does the BQ76930 handle low power consumption?
The BQ76930 allows sub-blocks to be enabled or disabled to control chip current consumption and features a SHIP mode for an ultra-low power state.
