Overview
The BQ79606A-Q1, produced by Texas Instruments, is a 6-S automotive precision battery monitor, balancer, and integrated protector designed for high accuracy and reliability in automotive battery management systems. This device is AEC-Q100 qualified and complies with SafeTI™-26262 ASIL-D standards, ensuring robust performance and safety in critical automotive applications.
It supports simultaneous measurements of three to six battery cells with high accuracy, featuring a ±1.1mV cell voltage measurement accuracy. The device also includes integrated 16-bit analog-to-digital converters (ADCs) and high-voltage AFE filter components, making it suitable for large stack configurations in electrified automotive drive trains.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Temperature Range | –40°C to +105°C | °C |
| Cell Voltage Measurement Accuracy | ± 1.1mV | mV |
| Digital Low Pass Filter | As low as 1.2Hz | Hz |
| ADC Resolution | 16-bit | |
| Stack Configuration | Up to 64 devices (1 base + 63 stack, 384-series cells) | |
| Communication Interface | UART, Isolated differential daisy-chain | |
| ESD Classification | HBM Level 2, CDM Level C4B | |
| Package Type | 48-PQFP (PHP) | |
| Package Size | 7.00 mm × 7.00 mm | mm |
Key Features
- Simultaneous, high accuracy measurements for three to six battery cells using Delta Sigma converters per cell input.
- Integrated 16-bit analog-to-digital converters (ADCs) and high-voltage AFE filter components.
- Configurable digital low pass filter as low as 1.2Hz.
- Full-accuracy stack measurements in less than 1 ms (for 96 cells).
- Optional ring architecture to ensure stack communication even with communication cable breaks.
- Monitors 3 to 6 cell connections and up to 6 NTC/auxiliary channels.
- Integrated hardware protector with secondary protection for cell overtemperature, undertemperature, overvoltage, and undervoltage.
- Integrated cell-balancing MOSFETs up to 150 mA.
- Designed for robust hot-plug performance and to pass BCI testing.
- UART host interface and isolated, differential daisy-chain communication interface supporting transformer or capacitor-based isolation.
Applications
- Full electric, plug-in hybrid, and hybrid vehicles.
- Automotive 12-V and 48-V Li-Ion battery systems.
- Grid storage battery systems.
- Uninterruptible power supplies (UPS).
- E-Bikes and E-Scooters.
Q & A
- What is the operating temperature range of the BQ79606A-Q1?
The operating temperature range is –40°C to +105°C.
- What is the cell voltage measurement accuracy of the BQ79606A-Q1?
The cell voltage measurement accuracy is ± 1.1mV.
- How many devices can be stacked using the BQ79606A-Q1?
Up to 64 devices (1 base + 63 stack, 384-series cells) can be stacked.
- What types of communication interfaces does the BQ79606A-Q1 support?
The device supports UART and isolated, differential daisy-chain communication interfaces.
- Is the BQ79606A-Q1 compliant with any safety standards?
Yes, it is SafeTI™-26262 ASIL-D compliant for voltage, temperature, and communication functions, and ASIL-B compliant for the hardware protector function.
- What is the purpose of the integrated hardware protector in the BQ79606A-Q1?
The integrated hardware protector provides secondary protection for cell overtemperature, undertemperature, overvoltage, and undervoltage.
- Can the BQ79606A-Q1 be used in hot-plug applications?
Yes, it is designed for robust hot-plug performance.
- What types of isolation does the daisy-chain communication interface support?
The daisy-chain communication interface supports either transformer or capacitor-based isolation.
- Does the BQ79606A-Q1 support cell balancing?
Yes, it includes integrated cell-balancing MOSFETs up to 150 mA.
- What is the package type and size of the BQ79606A-Q1?
The package type is 48-PQFP (PHP) with a size of 7.00 mm × 7.00 mm.
