Overview
The Texas Instruments bq78350-R1 is a comprehensive 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 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. It provides an accurate fuel gauge, state-of-health (SoH) monitoring, cell balancing, and a full array of voltage-, current-, and temperature-based protection features.
The bq78350-R1 accelerates product development by offering a robust set of Battery Management System (BMS) subsystems. It communicates via an SMBus 1.1 interface and can display state-of-charge (SoC) data through optional LED or LCD configurations. The device also logs important battery history and diagnostic data in non-volatile memory.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | TSSOP (30) | 7.80 mm x 6.40 mm |
| Supported Cell Configurations | 3-series to 15-series | |
| Maximum Capacity | Up to 320 Ah | |
| Current Reporting | Up to 320 A | |
| Temperature Sensor | On-chip and external NTC thermistor support | |
| Communication Interface | SMBus 1.1 with packet error checking (PEC) | |
| Power Modes | NORMAL, SLEEP, SHUTDOWN |
Key Features
- Compensated End-of-Discharge Voltage (CEDV) Gauging Algorithm: Accurately measures and calculates the available charge in battery cells.
- Flexible Configuration: Supports 3-series to 15-series Li-Ion and LiFePO4 batteries.
- Protection Features: Includes cell over/undervoltage, charge and discharge overcurrent, short circuit protection, and temperature-based protections.
- Charge Control: Supports CC-CV charging, precharge, charge inhibit, and charge suspend based on temperature.
- Lifetime Data Logging: Logs important measurements such as maximum and minimum temperatures, cell voltages, cycle count, and safety events.
- Authentication: Supports SHA-1 authentication by the host.
- Display Support: Drives up to a 5-segment LED or LCD display for state-of-charge indication.
- Programmable SMBus Slave Address: Optional resistor programmable SMBus slave address for up to eight different bus addresses.
Applications
- Light Electric Vehicles (LEVs): eBikes, eScooters, Pedelec, and Pedal-Assist Bicycles.
- Power and Gardening Tools: Battery-powered tools and equipment.
- Battery Backup and Uninterruptible Power Supply (UPS) Systems: Ensures continuous power supply during outages.
- Wireless Base Station Backup Systems: Provides backup power for wireless communication systems.
- Telecom Power Systems: Supports power management in telecommunications infrastructure.
- Handheld Vacuum Cleaners and Robot Vacuums: Battery management for portable cleaning devices.
Q & A
- What is the primary function of the bq78350-R1 Battery Management Controller?
The primary function is to provide accurate fuel gauging, state-of-health monitoring, cell balancing, and comprehensive protection features for Li-Ion and LiFePO4 batteries.
- What types of battery configurations does the bq78350-R1 support?
The bq78350-R1 supports 3-series to 15-series Li-Ion and LiFePO4 battery configurations with capacities up to 320 Ah.
- How does the bq78350-R1 communicate with other devices?
The bq78350-R1 communicates via an SMBus 1.1 interface with optional packet error checking (PEC).
- What safety features are included in the bq78350-R1?
The device includes cell over/undervoltage protection, charge and discharge overcurrent protection, short circuit protection, and temperature-based protections.
- Can the bq78350-R1 support different charging algorithms?
Yes, it supports various charging algorithms including CC-CV charging, precharge, charge inhibit, and charge suspend based on temperature.
- How does the bq78350-R1 log data?
The device logs important measurements such as maximum and minimum temperatures, cell voltages, cycle count, and safety events in non-volatile memory.
- Does the bq78350-R1 support authentication?
Yes, it supports SHA-1 authentication by the host.
- Can the bq78350-R1 drive display devices?
Yes, it can drive up to a 5-segment LED or LCD display for state-of-charge indication.
- How is the SMBus slave address configured on the bq78350-R1?
The SMBus slave address can be configured using a resistor programmable method for up to eight different bus addresses.
- What are the power modes supported by the bq78350-R1?
The device supports NORMAL, SLEEP, and SHUTDOWN power modes to optimize power consumption.
