BQ771601DPJR

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The BQ771601DPJR (‘DPJR’) is an advanced battery monitoring and protection integrated circuit (IC) that is well-suited for high power battery management applications. The IC comes with a 32-bit ARM7TDMI-S processor as well as a 16-bit Sigma-Delta Analogue to Digital Convertor (ADC). With these powerful components, the IC can provide for highly accurate measurements of battery cells as well as individual cell monitoring, protection and balancing. The DPJR is ideal for use in multi-cell battery packs of lithium-polymer, nickel-cadmium and other rechargeable cell types.

The DPJR’s application field lies mainly in robotic and military platforms, due to its advanced and accurate measurement and control capabilities. Additional items which can benefit from the DPJR include consumer and communications devices, electric vehicles and other industrial solutions.

The DPJR works by isolating the power path between the battery and the load, with the processor acting as the mediator between the two. The DPJR is typically placed between a power path MOSFET and the load, and the processor acts to monitor the voltage of the supply, or battery, and the current flow through it. The processor can also monitor and control temperature, allowing for temperature-based protection to be implemented.

The DPJR can measure cell voltage to a high degree of accuracy, using the onboard ADC in combination with the processor. This is due to the Sigma-Delta Analogue to Digital convertor’s ability to accurately convert the input voltage into digital data. The processor can then perform various calculations and control algorithms that can be used to predict and monitor the health of the battery.

The processor can also monitor and control the current flowing both in and out of the battery. This is done by monitoring the voltage and current at either the Battery or Load, and then the processor acts to adjust the current based on the actual demand or threshold. This feature allows for accurate monitoring and protection of the battery against over current, over voltage and over temperature conditions.

The DPJR also provides a mechanism to balance and control the voltage of individual cells, if required by the application. This is done by detecting and monitoring the voltage of each cell and then adjusting the output voltage to ensure uniformity across the cells. This provides an additional layer of protection and longevity to the battery pack.

The DPJR can also perform numerous calculations, such as the State of Charge (SOC) calculation and current or power consumption. The calculation of SOC provides vital information as to the health of the battery and is used to optimise the performance and longevity of the battery. Additionally, the SOC can be used to optimise the charging process in order for the battery get the maximum energy from its limited capacity.

Finally, the DPJR is designed to ensure that the battery is provided with the required power and current in any scenario, thus providing a complete and effective protection to the batteries. The processor ensures that the voltage, current and temperature are within the operating limits of the battery while at the same time providing an optimal level of power to the load.

In conclusion, the BQ771601DPJR is a powerful and highly accurate integrated battery management IC designed with the safety and efficiency of battery packs in mind. With its advanced features, such as its processor, ADC and protection capability, the DPJR is ideal for use in many high power battery application areas.

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