Overview
The Texas Instruments BQ78350-R1A is a comprehensive Battery Management System (BMS) controller designed for lithium-ion (Li-ion) and lithium iron phosphate (LiFePO4) batteries. It is a companion to the BQ769x0 family of analog front end (AFE) protection devices. This controller supports battery configurations ranging from 3-series to 15-series cells, with capacities up to 320 Ah, making it suitable for a wide range of portable and stationary battery applications. The BQ78350-R1A provides accurate fuel gauging, state-of-health (SoH) monitoring, cell balancing, and a full array of voltage-, current-, and temperature-based protection features, thereby accelerating product development and ensuring faster time-to-market.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 30-TSSOP (7.80 mm x 6.40 mm) |
| Operating Temperature Range | -40°C to 85°C |
| Interface | SMBus 1.1 |
| Mounting Type | Surface Mount |
| Battery Chemistry | Lithium Ion/Polymer, LiFePO4 |
| Number of Cells | 3 to 15 series |
| Maximum Capacity | Up to 320 Ah |
| Maximum Current Reporting | Up to 320 A |
| Fault Protection | Over Current, Over Temperature, Over/Under Voltage |
Key Features
- Compensated End-of-Discharge Voltage (CEDV) gauging algorithm for accurate fuel gauging and state-of-health (SoH) monitoring.
- Supports SMBus host communication for data transfer and configuration.
- Flexible configuration for 3- to 5-series (BQ76920), 6- to 10-series (BQ76930), and 9- to 15-series (BQ76940) battery configurations.
- 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.
- Supports CC-CV charging, including precharge, charge inhibit, and charge suspend.
- Optional LED or LCD display configurations for state-of-charge indication.
- Lifetime data logging for warranty and analysis purposes.
- SHA-1 authentication for secure communication.
Applications
- 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 BQ78350-R1A used for?
The BQ78350-R1A is a Battery Management System (BMS) controller for lithium-ion and lithium iron phosphate batteries, providing accurate fuel gauging, state-of-health monitoring, and various protection features.
- What battery configurations does the BQ78350-R1A support?
The BQ78350-R1A supports battery configurations ranging from 3-series to 15-series cells, with capacities up to 320 Ah.
- What communication interface does the BQ78350-R1A use?
The BQ78350-R1A uses the SMBus 1.1 interface for data transfer and configuration.
- What types of protection features does the BQ78350-R1A offer?
The BQ78350-R1A offers a full array of programmable protection features including voltage, current, and temperature protection.
- Does the BQ78350-R1A support temperature sensing?
Yes, the BQ78350-R1A has an on-chip temperature sensor option and supports external NTC thermistors from the companion AFE.
- How does the BQ78350-R1A handle charging?
The BQ78350-R1A supports CC-CV charging, including precharge, charge inhibit, and charge suspend.
- Can the BQ78350-R1A display state-of-charge information?
Yes, the BQ78350-R1A supports optional LED or LCD display configurations for state-of-charge indication.
- Does the BQ78350-R1A log lifetime data?
Yes, the BQ78350-R1A offers lifetime data logging for warranty and analysis purposes.
- What authentication method does the BQ78350-R1A use?
The BQ78350-R1A supports SHA-1 authentication for secure communication.
- What is the operating temperature range of the BQ78350-R1A?
The operating temperature range of the BQ78350-R1A is -40°C to 85°C.
