BQ26220PWG4

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The BQ26220PWG4 is an advanced battery management system designed to improve battery performance and extend battery life. It is a highly integrated single–chip solution designed to monitor, charge and protect battery packs. The BQ26220PWG4 is particularly suitable for battery packs with 3 to 7 cells. This device is currently available in a 48-pin, 5mm×6mm lead free, RoHS compliant, and easy–to-use package.

This device is primarily intended for use in applications such as portable electronics, mobile phones and portable audio and video systems that use Li-ion or Li-polymer battery cells. It also provides the ability to monitor and protect the battery pack without requiring an additional external circuit. With its low power consumption, the BQ26220PWG4 enables increased battery life and operation time.

The BQ26220PWG4 is a versatile device that supports many different functions. It includes battery capacity and voltage monitoring, cell balancing, temperature monitoring and protection, and charge current control. It can be used to monitor the battery cells’ relative current, capacity and temperature for a more accurate handling of state-of-charge and battery aging. The BQ26220PWG4 also features a low voltage protection function for safe battery operation which prevents cells from over-discharging.

The BQ26220PWG4\'s working principle is quite simple. The device measures the voltage, current and temperature of each cell in the battery pack and calculates the battery pack\'s state-of-charge. Based on this information, the device will then control charging, power consumption and protect the battery pack. The BQ26220PWG4 also supports cell balancing through active shifting. This feature allows all the cells in the battery to be continuously charged and disconnected in a proper sequence to minimize imbalances and optimize the charging efficiency.

In addition to charge management, the BQ26220PWG4 also provides several means of protecting the battery pack, such as overcharge, over-temperature, under-voltage and over-current protection. Furthermore, this device can be used to limit the pack temperature for improved safety. It also has a built-in timer with programmable timeout for end-of-charge and end-of-discharge.

To summarize, the BQ26220PWG4 is a highly integrated, low power and low cost solution for battery management in portable electronic applications. It offers features like cell voltage and capacity monitoring, cell balancing, temperature monitoring and protection, and charge current control for improved battery life and operation time. The device\'s working principle is to continuously monitor the battery cells, control charging, power consumption and protect the battery pack. It is primarily designed for use in Li-ion or Li-polymer battery packs, providing an easy-to-implement and reliable solution.

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