Overview
The BQ7692000PWR, part of the BQ769x0 family, is a robust analog front-end (AFE) device designed by Texas Instruments for battery management in high-power systems. This device is specifically tailored for monitoring and protecting lithium-ion (Li-ion) and lithium-iron phosphate battery packs. It supports up to 5-series cells or typical 18-V packs, making it suitable for applications such as light electric vehicles, power tools, and uninterruptible power supplies. The BQ76920 operates with low power consumption, allowing sub-blocks within the IC to be enabled or disabled to control overall chip current, and it includes a SHIP mode for ultra-low power states.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (BAT–VSS) | 6 to 25 | V |
| Operating Temperature Range | -40 to 85 | °C |
| Package Type | TSSOP (PW) | - |
| Number of Pins | 20 | - |
| Cell Input Differential Voltage | 2 to 5 | V |
| Current Sense Range | -10 to 10 | mV |
| Cell Balancing Current (per cell) | 70 mA | - |
| I2C Interface Voltage | 0 to 3.6 | V |
| Output Voltage Regulator | 2.5 or 3.3 | V |
Key Features
- AFE Monitoring Features: Pure digital interface with internal ADCs measuring cell voltage, die temperature, and external thermistor.
- Integrated A/D Converters: Enable purely digital readout of critical system parameters, with calibration handled in TI’s manufacturing process.
- Hardware Protection Features: Overcurrent in discharge (OCD), short circuit in discharge (SCD), overvoltage (OV), undervoltage (UV), and secondary protector fault detection.
- Cell Balancing and FET Drivers: Integrated cell balancing FETs and charge/discharge low-side NCH FET drivers.
- Alert and Interface: Alert interrupt to host microcontroller and simple I2C compatible interface with CRC option.
- Low Power Operation: Sub-blocks within the IC can be enabled or disabled to control overall chip current consumption, and a SHIP mode for ultra-low power states.
- Thermistor Support: Directly supports up to three thermistors (103AT).
- No EEPROM Programming Necessary: Preconfigured settings permanently stored in EEPROM.
Applications
The BQ7692000PWR is designed for use in various high-power systems, including:
- Light electric vehicles
- Power tools
- Uninterruptible power supplies (UPS)
- Other battery-powered equipment requiring robust monitoring and protection
Q & A
- What is the BQ7692000PWR used for?
The BQ7692000PWR is used for monitoring and protecting lithium-ion (Li-ion) and lithium-iron phosphate battery packs in high-power systems.
- How many series cells does the BQ76920 support?
The BQ76920 supports up to 5-series cells or typical 18-V packs.
- What is the operating temperature range of the BQ7692000PWR?
The operating temperature range is -40°C to 85°C.
- What type of package does the BQ7692000PWR come in?
The BQ7692000PWR comes in a TSSOP (PW) package with 20 pins.
- Does the BQ7692000PWR require EEPROM programming?
No, the BQ7692000PWR does not require EEPROM programming as settings are preconfigured and permanently stored in EEPROM.
- What protection features are included in the BQ7692000PWR?
The device includes overcurrent in discharge (OCD), short circuit in discharge (SCD), overvoltage (OV), undervoltage (UV), and secondary protector fault detection.
- How does the BQ7692000PWR manage cell balancing?
The device includes integrated cell balancing FETs and charge/discharge low-side NCH FET drivers.
- What interface does the BQ7692000PWR use for communication?
The BQ7692000PWR uses an I2C compatible interface with a CRC option.
- Can the BQ7692000PWR operate in low power modes?
Yes, the device allows sub-blocks to be enabled or disabled to control overall chip current consumption and includes a SHIP mode for ultra-low power states.
- How many thermistors can the BQ7692000PWR support?
The device directly supports up to three thermistors (103AT).
