DS2751E+025/T&R

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Power management IC (PMIC) has been widely used in modern electronic application, specifically regulating the power supply and optimize the power consumption for specific needs and platform. Battery Management (BM) is an important application of PMIC. In this article, we\'ll look into the application of DS2751E+025/T&R and its working principle.

DS2751E+025/T&R Application

The DS2751E+025/T&R is a stand-alone Li-Ion/Polymer fuel gauge IC, providing highly accurate estimates of remaining capacity. Its high degree of accuracy comes from its sophisticated automatic calibration technique which utilizes both coulomb counting and AFEs to learn cell parameters of a fresh battery and actively track the condition of an aging battery.

The DS2751E+025/T&R is able to perform measurement and processing of battery voltage, current, and temperature. It has a configurable under-voltage and over-voltage detection limit, as well as a programmable short circuit current limit. The DS2751E+025/T&R is suitable for Li-Ion and Li-Polymer batteries. It is able to accurately measure rate of charge, rate of discharge, temperature, Voltage, Coulomb Counter and State-of-Charge (SoC) and State of Health (SoH).

The DS2751E+025/T&R is designed with a number of features designed to improve safety, accuracy and lifetime of the Li-Ion/Polymer battery. It can detect overcharging and high temperature conditions, as well as set alarms and shut configurable alarms for second-level protection. It also includes a filtering algorithm which automatically adjusts for parasitic current. The DS2751E+025/T&R also provides accurate estimates of remaining capacity via sophisticated automatic calibration technique.

The DS2751E+025/T&R is largely used in typical BM application such as mobile phones, portable media players, digital cameras, camcorders and other portable electronics. It is also used in electric cars and other large scale battery related products.

Working Principle

The working principle of the DS2751E+025/T&R is based on coulomb counting. Coulomb counting is a technique the measures the charge and discharge current per unit time. The amount of charge that passes through the battery each second is measured and stored in a register called the coulomb counter. The counter is incremented or decremented as energy is added or subtracted from the battery.

The DS2751E+025/T&R also includes two Analog Front Ends (AFEs). The AFEs measure voltage, current and temperature independently of each other. The AFEs works by taking the input current and converting it into a voltage and then amplifying it to a level that can be read by the electronic circuit. The voltage output from the AFEs is then mixed and amplified to reduce noise and offer better accuracy.

This data is then combined with the information stored in the coulomb counter to estimate SoC and SoH. The result is then used to indicate remaining capacity and provide alarms when a threshold is reached. This enables safer and more accurate power management.

Conclusion

In conclusion, the DS2751E+025/T&R is a stand-alone Li-Ion/Polymer fuel gauge IC designed to improve safety, accuracy and lifetime of the Li-Ion/Polymer battery. It has been widely used in mobile devices, portable media players and electric cars for battery management. The DS2751E+025/T&R is capable of accurately measuring rate of charge, rate of discharge, temperature, voltage, and remaining capacity. Its working principle is based on coulomb counting and AFEs, which measures and amplifies the input current to a level that can be read by the circuit. The DS2751E+025/T&R is an invaluable tool in BM, providing greater accuracy and safety.

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