Overview
The BQ76PL455APFCR, produced by Texas Instruments, is an integrated 16-cell battery monitoring and protection device designed for high-reliability, high-voltage industrial applications. This device is part of the BQ76PL455A family and is optimized for monitoring and balancing battery cells in various industrial and automotive settings. It features a high-speed, differential, capacitor-isolated communications interface, allowing up to sixteen devices to communicate with a host through a single high-speed Universal Asynchronous Receiver/Transmitter (UART) interface.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Number of Cells Monitored | Range of cells per device | 6 to 16 cells |
| ADC Resolution | Analog-to-Digital Converter resolution | 14-bit |
| Conversion Time | Time to convert all cells | 2.4 ms (nominal) |
| AUX Inputs | Number and range of auxiliary inputs for temperature and other sensors | 8 inputs, 0 V to 5 V |
| Operating Voltage Range | Range of operating voltage for the device | 16 V to 79.2 V |
| Cell Voltage Range | Range of cell voltage measurement | 1 V to 5 V |
| Operating Temperature Range | Range of operating temperature for the device | -40°C to 105°C |
| Communication Interface | Type of communication interface | Up to 1-Mb/s Stackable Isolated Differential-UART |
| Package | Type and size of the package | TQFP-80, 12.00 mm × 12.00 mm |
Key Features
- Highly Accurate Monitoring: Utilizes a high-performance 14-bit Analog-to-Digital Converter (ADC) with an internal precision reference.
- Integrated Protector: Includes separate Vref for overvoltage (OV) and undervoltage (UV) comparators and programmable VCELL set points.
- Passive and Active Balancing: Supports passive balancing with external n-FETs and active balancing with EMB1428Q/EMB1499Q.
- Robust Communications: Features up to 1-Mb/s stackable isolated differential-UART, supporting up to 16 ICs in a daisy chain.
- Additional Monitoring and Programmability: Includes six GPIO ports and eight analog AUX ADC inputs for temperature and other sensors.
- Thermal Protection: Includes a secondary thermal shutdown for further protection.
- Functional Safety Compliance: Designed to help meet functional safety standard requirements.
Applications
- Energy Storage (ESS) and UPS: Suitable for energy storage systems and uninterruptible power supplies.
- E-Bikes and E-Scooters: Ideal for monitoring and balancing battery cells in electric bicycles and scooters.
- Automotive Applications: AEC-Q100 compliant versions are available for automotive use, ensuring reliability in vehicle systems.
Q & A
- What is the primary function of the BQ76PL455APFCR?
The primary function is to monitor and balance battery cells in high-voltage industrial applications.
- How many cells can the BQ76PL455APFCR monitor?
The device can monitor 6 to 16 cells per device.
- What is the resolution of the ADC in the BQ76PL455APFCR?
The ADC resolution is 14-bit.
- What is the operating voltage range of the BQ76PL455APFCR?
The operating voltage range is from 16 V to 79.2 V.
- What types of fault conditions can the BQ76PL455APFCR detect?
The device can detect overvoltage, undervoltage, overtemperature, and communication faults.
- How does the BQ76PL455APFCR handle cell balancing?
The device supports both passive balancing with external n-FETs and active balancing with EMB1428Q/EMB1499Q.
- What is the communication interface used by the BQ76PL455APFCR?
The device uses a high-speed stackable isolated differential-UART interface.
- Can multiple BQ76PL455APFCR devices be stacked?
Yes, up to 16 devices can be stacked in a daisy chain to support up to 96 cells.
- What is the operating temperature range of the BQ76PL455APFCR?
The operating temperature range is from -40°C to 105°C.
- Does the BQ76PL455APFCR support additional monitoring and programmability?
Yes, it includes six GPIO ports and eight analog AUX ADC inputs for additional monitoring and programmability.
