Texas Instruments bq78706 Safety-Compliant 14S Battery Monitor
Texas Instruments bq78706 Functional Safety-Compliant 14S Battery Monitor offers high-accuracy cell voltage measurements for up to 14 battery modules in high-voltage battery management systems within energy storage systems (ESS) and portable power stations (PPS). The TI BQ78706 includes a state-of-the-art ADC architecture/measurement system that meets stringent safety requirements. The daisy chain is isolated by a transformer (or capacitor), and the device is developed for centralized or distributed architectures in residential, commercial, or grid-scale energy storage systems.
Features
- Functional Safety-Compliant
- Documentation to aid ISO 26262 system design
- Systematic capability up to ASIL B
- Hardware capability up to ASIL B
- Measure 9 to 14 batteries in series per device, stackable up to 64 devices
- Dedicated ADC with ±3.2mV accuracy over temperature
- Cell voltage and battery pack current measurement synchronized to 64μs
- Support limp mode with full redundancy
- Integrated post-ADC configurable digital low-pass filters
- Supports busbar without affecting measurement accuracy
- 12 GPIOs for temp sensor/analog/digital/I2C controller/SPI controller
- Internal cell balancing
- Balancing at 300mA
- User-controlled PWM adjustment cell balancing current
- Built-in balancing thermal management with automatic pause and resume control
- Robust daisy chain communication and support Ring Architecture
- Hardware reset by the host simulates a POR-like event without battery removal
- Support transformer and capacitive isolation
- On-chip memory for one-time custom programming
- Low power mode current <6μA
- Compatible with bq79600-Q1 with SPI/UART interface
Applications
- Energy storage systems
- Portable power stations
Associated Products
Texas Instruments bq79600-Q1 Automotive SPI/UART Comm Interface
Designed to interface between a microcontroller (MCU) and TI battery monitoring ICs.
Simplified System Diagram
Published: 2025-01-07
| Updated: 2025-01-10