Overview
The BQ79612-Q1, produced by Texas Instruments, is an automotive 12-S precision battery monitor, balancer, and integrated protector. This device is designed for high-voltage battery management systems in hybrid and electric vehicles (HEV/EV). It is AEC-Q100 qualified and compliant with functional safety standards up to ASIL D, making it suitable for critical automotive applications. The BQ79612-Q1 offers high-accuracy cell voltage measurements, internal cell balancing, and advanced communication interfaces, ensuring reliable and efficient battery management.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Device Temperature Range | Ambient operating temperature | –40°C to +125°C |
| ESD Classification | HBM ESD classification level | Level 2 |
| ESD Classification | CDM ESD classification level | C4B |
| ADC Accuracy | Cell voltage measurement accuracy | +/- 1.5mV |
| Measurement Time | Time for cell voltage measurements | Within 128 µs for all cell channels |
| Balancing Current | Internal cell balancing current | 240 mA |
| Package Type | Package and pin count | HTQFP (PAP) with 64 pins |
| Thermal Shutdown | Thermal shutdown temperature (rising direction) | 130°C to 152°C |
| Supply Current | Baseline supply current in SLEEP mode | 120 µA to 160 µA (TA = -20°C to 65°C) |
Key Features
- High-accuracy cell voltage measurements within 128 µs for all cell channels.
- Internal cell balancing with a balancing current of 240 mA and built-in thermal management.
- Integrated post-ADC configurable digital low-pass filters for better state of charge (SOC) calculation.
- Supports bus bar connection and measurement.
- Built-in host-controlled hardware reset to emulate POR-like device reset.
- Isolated differential daisy chain communication with optional ring architecture.
- Embedded fault signal and heartbeat through communication line.
- UART/SPI host interface and built-in SPI master.
- Eight GPIOs or auxiliary inputs for external thermistor measurements.
Applications
The BQ79612-Q1 is primarily used in Battery Management Systems (BMS) for hybrid and electric powertrain systems. It is suitable for energy storage battery packs and other high-voltage battery applications in the automotive sector.
Q & A
- What is the BQ79612-Q1 used for?
The BQ79612-Q1 is used for precision battery monitoring, balancing, and protection in high-voltage battery management systems, particularly in hybrid and electric vehicles. - What are the key features of the BQ79612-Q1?
Key features include high-accuracy cell voltage measurements, internal cell balancing, integrated post-ADC filters, and isolated differential daisy chain communication. - What is the operating temperature range of the BQ79612-Q1?
The device operates within an ambient temperature range of –40°C to +125°C. - Is the BQ79612-Q1 compliant with automotive safety standards?
Yes, it is AEC-Q100 qualified and compliant with functional safety standards up to ASIL D. - How accurate are the cell voltage measurements of the BQ79612-Q1?
The device provides cell voltage measurements with an accuracy of +/- 1.5mV. - What is the balancing current of the BQ79612-Q1?
The balancing current is 240 mA. - Does the BQ79612-Q1 support external thermistor measurements?
Yes, it includes eight GPIOs or auxiliary inputs for external thermistor measurements. - How does the BQ79612-Q1 communicate with the host system?
The device communicates via UART/SPI interfaces and an isolated differential daisy chain communication interface. - What is the package type and pin count of the BQ79612-Q1?
The device is packaged in a HTQFP (PAP) with 64 pins. - Does the BQ79612-Q1 have built-in thermal management for balancing?
Yes, it includes built-in balancing thermal management with automatic pause and resume control.
