BQ771600DPJT

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PMIC - Battery Management - BQ771600DPJT application field and working principle

The advancement of power electronics has seen huge leaps in recent years due to the introduction of a variety of power devices such as Metal Oxide Semiconductor Field Effect Transistors (MOSFETs) and InsulatedGate Bipolar Transistors (IGBTs). In order to handle and manage such power devices, designers often need to employ a Power Management Integrated Circuit (PMIC) such as the BQ771600DPJT.

The BQ771600DPJT is a PMIC specially designed to do protective and/or basic control functions over battery cells. It has the capability of conducting up to 16 cells in series connection. With a total of 144 low resistance FETs (12 for the positive and 12 for the negative of each cell) integrated within the chip, the BQ771600DPJT provides an efficient, powerful and robust battery management system.

The input voltage of the BQ771600DPJT can accommodate from 2.7V to 12V. Its total power consumption is kept low, with a standby current dissipation of only 0.3 μA. Operating temperature range for the device is from -40 °C to +105 °C in case of non-condensing humidity up to 95%.

Unlike other simpler battery management chips, the BQ771600DPJT has the additional capability of controlling the current and charging voltage within a predefined safety threshold. The chip also features an integrated charge pump that can raise its input voltage to a higher level, enabling it to handle cells with higher charging voltages. This makes it suitable to monitor and manage cells with high energy density.

In summation, the BQ771600DPJT offers a comprehensive battery management solution which allows automate, monitor and control bulk battery cells in one package. The PMIC chip is ideal to handle Li-ion and Li-Pol battery cells with high charge and voltage levels, protecting against common battery events.

The workings and applications of the BQ771600DPJT can be broken down into two core concepts, the "protection" of the battery cells and the “basic control” of such cells.

Protection: The protective features of the BQ771600DPJT mainly involves monitoring and monitoring cells with standard electrical events and parameters. The PMIC chip may consider such parameters as the current drawn, voltage, temperature and safety margin to determine when it is necessary to act. If a safety threshold is exceeded, the chip will issue a reset signal, thus shutting down the battery cells to ensure their safety.

Basic Control: The BQ771600DPJT also has some basic control functions. This includes the capability for it to impose specific charge and discharge currents upon the battery cells, as well as the ability to perform balancing during and after charging. This can eliminate any voltage non-uniformity that may be present between the different cells in a battery. Apart from that, the chip also has built-in delay and pulse control abilities which allows it to handle multiple types of loads.

In conclusion, the BQ771600DPJT is a robust and reliable PMIC chip which features a complete set of protection and basic control functions suitable for Li-ion or Li-Pol battery cells. The versatile documentations provided allows the chip to be highly customized to the user’s needs and the integrated charge pump provides additional efficiency while charging.

This makes the BQ771600DPJT an ideal choice for those that require an effective, efficient and robust battery management system.

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