BQ27350PW

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PMIC (Power Management ICs) covers a wide range of products, applications and working principles. One of the most popular and widely used PMICs is the BQ27350PW. In this article, we will discuss the application field of BQ27350PW and its working principle.

Application Field of BQ27350PW

The BQ27350PW is a micro-power, single-cell fuel gauge IC. It enables the comparison of available energy to the stored energy and provides a warning prior to the cell being completely discharged. This makes it an ideal choice for applications that rely on a single-cell source, such as battery-powered devices, medical devices, remote sensors and meters.

The BQ27350PW features a voltage accuracy of ±1.5% over temperature and a 0.4% total Uncorrected Error (UCE) which, when combined with its current sensing accuracy, provides fuel gauging within 1% accuracy from the available charge.

The device includes a temperature compensated coulomb-counting engine that allows for minimizing errors with respect to charge and discharge over a wide temperature range. The voltage and current sampling accuracy provide a high degree of precision and make it an excellent choice for applications that require accurate charge and discharge monitoring.

Working Principle of BQ27350PW

The working principle of BQ27350PW is based on the Coulomb Counting mechanism. This mechanism monitors the voltage, current and temperature of the cell and changes the counter accordingly. The device can store up to 16 bytes of data, including temperature and voltage thresholds, making it easy to monitor the state of charge of the battery. The device also has a pin used as an alert to notify the user that the cell is reaching a certain voltage level.

The BQ27350PW can be used not just to monitor the state of charge of the battery, but also to protect the battery from overcharging and overdischarging. This is done by setting the temperature and voltage thresholds for charging and discharging. If the current monitored temperature or voltage exceeds the set threshold values, the device will shut off the charging and/or discharging process.

Conclusion

The BQ27350PW is an excellent choice for applications that require accurate monitoring of the state of the energy stored in a single-cell source. Its accurate voltage and current measurements, in addition to its temperature compensating engine, make it ideal for reliable fuel gauging. The device also includes pins that alert the user when the cell reaches or exceeds the set voltage threshold. All of these features make it an excellent choice for applications that require precise battery management.

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