Overview
The Texas Instruments BQ78350DBTR-R1 is a state-of-the-art Li-Ion and LiFePO4 Battery Management Controller designed to work in conjunction with the bq769x0 family of Analog Front End (AFE) protection devices. This controller provides a comprehensive set of Battery Management System (BMS) subsystems, facilitating faster product development and time-to-market. It supports battery configurations ranging from 3-series to 15-series cells and offers accurate fuel gauging, state-of-health (SoH) monitoring, cell balancing, and a full range of voltage-, current-, and temperature-based protection features.
Key Specifications
| Parameter | Specification |
|---|---|
| Part Number | BQ78350DBTR-R1 |
| Package Type | TSSOP (30 pins) |
| Body Size (Nom) | 7.80 mm x 6.40 mm |
| Battery Capacity (Min/Max) | 100 mAh / 320,000 mAh |
| Cell Chemistry | Li-Ion/Li-Polymer, LiFePO4 |
| Communication Interface | I2C, SMBus |
| Number of Series Cells | >4 Cells |
| Operating Temperature Range | -40°C to 85°C |
| Cell Balancing | External, Internal |
| External Capacity Indication | LCD, LED, SOC |
| Gas Gauge Algorithm | CEDV (Compensated End-of-Discharge Voltage) |
Key Features
- Compensated End-of-Discharge Voltage (CEDV) gauging algorithm for accurate fuel gauging.
- Supports SMBus host communication for data transfer.
- Flexible configuration for 3- to 5-series (bq76920), 6- to 10-series (bq76930), and 9- to 15-series (bq76940) Li-Ion and LiFePO4 batteries.
- Supports battery configurations up to 320 Ahr and charge/discharge current reporting up to 320 A.
- On-chip temperature sensor option and external NTC thermistor support from the companion AFE.
- Full array of programmable protection features including voltage, current, and temperature protection.
- Lifetime data logging for warranty and analysis purposes.
- Supports CC-CV charging, including precharge, charge inhibit, and charge suspend.
- Optional resistor programmable SMBus slave address for up to eight different bus addresses.
- Drives up to a 5-segment LED or LCD display for state-of-charge indication.
- Provides SHA-1 authentication for security.
Applications
- Light Electric Vehicles (LEVs): eBikes, eScooters, Pedelec, and Pedal-Assist Bicycles.
- Power and Gardening Tools.
- Battery Backup and Uninterruptible Power Supply (UPS) Systems.
- Wireless Base Station Backup Systems.
- Telecom Power Systems.
- Handheld Vacuum Cleaners and Robot Vacuums.
Q & A
- What is the primary function of the BQ78350DBTR-R1?
The BQ78350DBTR-R1 is a Li-Ion and LiFePO4 Battery Management Controller that provides accurate fuel gauging, state-of-health monitoring, cell balancing, and various protection features.
- Which battery chemistries does the BQ78350DBTR-R1 support?
The BQ78350DBTR-R1 supports Li-Ion, Li-Polymer, and LiFePO4 battery chemistries.
- What communication interfaces does the BQ78350DBTR-R1 use?
The BQ78350DBTR-R1 uses I2C and SMBus communication interfaces.
- What is the operating temperature range of the BQ78350DBTR-R1?
The operating temperature range is -40°C to 85°C.
- Does the BQ78350DBTR-R1 support external capacity indication?
- What is the CEDV algorithm used in the BQ78350DBTR-R1?
The CEDV (Compensated End-of-Discharge Voltage) algorithm is used for accurate fuel gauging.
- Can the BQ78350DBTR-R1 be configured for different series cell applications?
- Does the BQ78350DBTR-R1 support lifetime data logging?
- What security feature does the BQ78350DBTR-R1 provide?
- What types of charging does the BQ78350DBTR-R1 support?
