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PMIC: Battery Management

BQ771808DPJT application field and working principle

The BQ771808DPJT is one of the well-known Battery Management Integrated Circuit (IC) among the BQ77000 family manufactured by Texas Instruments. It has a very compact and sleek design that allows even the most advanced features of BQ77000 family (such as state-of-charge tracking and reporting, charge control, cell balancing, power supply monitoring and power tracking) to be implemented in handheld and portable applications. Furthermore, it is capable of communicating with various types of host processor interfaces such as I2C, SPI and LIN.

The BQ771808DPJT\'s main application fields are handheld battery management applications that include portable medical equipment, automotive applications and consumer electronics. The integrated circuit is also suitable for a variety of other battery management applications including remote monitoring and provisioning, battery dispatch and charging, and battery powered wearables and toys. The IC has built-in protection features such as overvoltage, undervoltage and over temperature protection up to 85 degrees Celsius to ensure the safety and reliability of connected batteries, and support features like pre-charge and trickle charging.

The BQ771808DPJT is equipped with an active battery management algorithm that serves to track the state-of-charge (SOC), state-of-health (SOH), and capacity. Its advanced features like power management, cell balancing, and temperature tracking ensure an optimal battery performance and life. Artifical Intelligent (AI) algorithms are integrated to allow the IC to instantly identify any abnormal cell conditions and take actions accordingly before the battery performance and life degrade further.

The BQ771808DPJT works based on the principle of current and voltage sensing using external sense pins, in order to monitor the battery charge and discharge cycles. When the voltage across the voltage terminals of the battery decreases, the battery is said to be discharging and the output from the BQ771808DPJT will be low. Similarly, when the voltage across the terminals of the battery increases, the battery is said to be charging and the output from the BQ771808DPJT will be high. The BQ771808DPJT is also equipped with a number of analog and digital input/output pins that allow interfacing with many I/O devices as well as on-chip memory to store configuration data.

In conclusion, the BQ771808DPJT is an excellent choice for battery management applications when power, protection, scalability and flexibility are key requirements. Its integrated features provide reliable and accurate monitoring and control of battery cells while the advanced algorithms enable advanced power management capabilities.

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