BQ771801DPJR

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The BQ771801DPJR, developed by Texas Instruments, is a dual-bank battery protection and management system for two cell, lithium-ion battery packs. It integrates a comprehensive set of safety monitoring and control features into a single package, eliminating the need for multiple discrete protection and control components. This device is suitable for applications where safe operating conditions must be ensured, such as electric vehicles, personal electronics, and medical devices.

The BQ771801DPJR provides protection against overcharge, over-discharge, over-current, overtemperature, and short-circuit conditions. It monitors battery parameters such as barcode identification, cell voltage, and temperature, and sends an alert to the host system when a safety limit is exceeded. The host system can also use these parameters to estimate the health of the battery and adjust its charging profile as needed. The integrated enabling circuitry simplifies the hot-swap and fault identification sequences.

The BQ771801DPJR is designed with both single-cell and dual-cell configuration options. It features an 8-bit microcontroller core and advanced analog and digital interfaces that allow for communication and configuration with other system components. The device also contains integrated EEPROM, programmable timer counter, and serial peripheral interface (SPI) interfaces that can be used to store critical settings, control signals, and monitor output data. Additionally, a calibration pin is provided to digitally adjust the voltage and resistance measurement accuracy.

The BQ771801DPJR enables safe charging and discharging of the system battery and utilizes various safety protocols to protect the battery from damage and reduce stress on the BMS. The device monitors the voltage and current of each cell in the battery pack, in order to maintain safe operating conditions. It is also able to detect faults in the cells, such as low levels of charge, over-temperature, over-voltage, and over-current. In the event of a fault, the BQ771801DPJR will alert the system host and initiate a safety procedure, such as disabling the load to prevent further damage.

Additionally, the BQ771801DPJR is capable of self-diagnosing battery health and can generate alarm signals in response to faults. These alarms may be transmitted to the system host via I2C, SPI, or other communication protocols. The device also offers a variety of protections, such as locked-cell protections, cell balancing, and light load shutdown, which help to ensure the safe operation of the battery.

In conclusion, the BQ771801DPJR is an ideal solution for protection and monitoring of two cell, lithium-ion battery packs. Its integrated safety features provide robust protection for the battery, while its versatile communication interfaces make it easy to integrate with the host system. Its SPI-based configuration and calibration allow for easy setup and adjustment of its features, ensuring reliable performance in any application.

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