Overview
The Texas Instruments BQ78350DBTR is a Battery Management Controller designed to work in conjunction with the bq769x0 family of Analog Front End (AFE) protection devices. This controller is part of a comprehensive Battery Management System (BMS) that supports a wide range of lithium-ion and lithium iron phosphate battery applications. It is particularly suited for portable and stationary battery systems, supporting configurations from 3-series to 15-series cells with capacities up to 320 Ah. The BQ78350 provides accurate fuel gauging, state-of-health (SoH) monitoring, cell balancing, and extensive protection features based on voltage, current, and temperature.
Key Specifications
| Parameter | Value | Description |
|---|---|---|
| Manufacturer | Texas Instruments | |
| Part Number | BQ78350DBTR | |
| Package Type | RECTANGULAR, Surface Mount | Package Body Material: PLASTIC/EPOXY, Terminal Form: GULL WING |
| No. of Terminals | 30 | |
| Minimum Operating Temperature | -40°C | |
| Maximum Operating Temperature | 85°C | |
| Minimum Supply Voltage (Vsup) | 2.4 V | |
| Nominal Supply Voltage (Vsup) | 2.5 V | |
| Maximum Supply Voltage (Vsup) | 2.6 V | |
| Moisture Sensitivity Level (MSL) | 2 | |
| Cell Support Range | 3-series to 15-series | Supports up to 320 Ah battery capacities |
Key Features
- Accurate Fuel Gauging and State-of-Health (SoH) Monitoring: Uses Compensated End-of-Discharge Voltage (CEDV) technology to measure and calculate the available charge in battery cells, adjusting for temperature and state-of-charge.
- Cell Balancing: Configures the bq769x0 to connect to selected cells in sequence for balancing and individual cell fault functions.
- Protection Features: Includes voltage-, current-, and temperature-based protection features, such as charge inhibit and charge suspend if battery pack temperature is out of range.
- Data Interface: Provides data over SMBus 1.1 interface, including battery history and diagnostic data stored in non-volatile memory.
- Display Options: Optional LED or LCD display configurations for capacity reporting.
- Lifetime Data Logging: Logs important measurements such as maximum and minimum temperatures, cell voltages, cycle count, and safety events for warranty and analysis purposes.
- Authentication: Supports authentication by the host using SHA-1.
Applications
The BQ78350DBTR is suitable for a wide range of portable and stationary battery applications, including but not limited to:
- Electric vehicles and hybrid electric vehicles
- Energy storage systems
- Industrial power tools and equipment
- Consumer electronics with high-capacity battery packs
- Renewable energy systems
Q & A
- What is the primary function of the BQ78350DBTR?
The primary function of the BQ78350DBTR is to serve as a Battery Management Controller, providing accurate fuel gauging, state-of-health monitoring, cell balancing, and protection features for lithium-ion and lithium iron phosphate batteries.
- Which Analog Front End (AFE) devices does the BQ78350DBTR support?
The BQ78350DBTR supports the bq76920, bq76930, and bq76940 AFE devices.
- What is the cell support range of the BQ78350DBTR?
The BQ78350DBTR supports battery configurations from 3-series to 15-series cells.
- How does the BQ78350DBTR measure battery capacity?
The BQ78350DBTR uses Compensated End-of-Discharge Voltage (CEDV) technology to measure and calculate the available charge in battery cells, adjusting for temperature and state-of-charge.
- What types of protection features does the BQ78350DBTR offer?
The BQ78350DBTR offers voltage-, current-, and temperature-based protection features, including charge inhibit and charge suspend if battery pack temperature is out of range.
- How does the BQ78350DBTR communicate with external devices?
The BQ78350DBTR communicates over an SMBus 1.1 interface, providing access to battery data, history, and diagnostic information.
- Does the BQ78350DBTR support display configurations?
Yes, the BQ78350DBTR supports optional LED or LCD display configurations for capacity reporting.
- What kind of data logging does the BQ78350DBTR provide?
The BQ78350DBTR logs important measurements such as maximum and minimum temperatures, cell voltages, cycle count, and safety events for warranty and analysis purposes.
- Does the BQ78350DBTR support authentication?
Yes, the BQ78350DBTR supports authentication by the host using SHA-1.
- What is the operating temperature range of the BQ78350DBTR?
The operating temperature range of the BQ78350DBTR is from -40°C to 85°C.
