BQ20Z90DBTR

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The Texas Instruments BQ20Z90DBTR is an advanced smart battery system management integrated circuit designed to provide complete protection and management for multi-cell battery packs. An integrated Gas Gauge with Coulomb Counter is a particularly useful feature which enables fuel gauging of the amount of battery charge remaining. This reliable power management integrated circuit is widely used in various application fields ranging from consumer electronics to automotive. In the following sections, we will explore the application fields and working principle of the BQ20Z90DBTR.

Application Fields

The BQ20Z90DBTR is commonly used in consumer electronic applications such as laptop computers, digital media players, camcorders and portable audio players. It is also suitable for automotive applications such as starter batteries, on-board chargers and valve regulated lead acid batteries. Furthermore, the integrated gas gauge within the BQ20Z90DBTR enables accurate fuel gauging over many charging sessions, thus making it ideal for mobile device applications such as cellular phones, ambient light sensor backlighting, remote security systems and many other consumer or automotive applications.

Working Principle

The device monitors and manages several key functions in a multi-cell battery pack, such as monitoring temperature and charge current, temperature compensation, over-current and over-voltage cut-off protection, and short-circuit protection. The device also features SpikeSuppressionTM which provides protection from voltage and current spikes during load transients. It also synchronizes LEDs on/off sequences to improve the visual indication of charging status. A dedicated Apple SMBUS/ USB port provides communication interface at high speed and enables system integration.

The \'Gas Gauge\' monitors the charge of the battery pack and stores the information in an internal data flash memory. The fuel gauge IC keeps track of how much charge is used and how much is remaining. The gas gauge also incorporates electrochemical modelling and a temperature compensation algorithm to accurately calculate the state of charge in the battery. The IC provides users with accurate estimates of the remaining life of the battery.

In conclusion, the BQ20Z90DBTR is a reliable power management integrated circuit that is ideal for wide range of applications from consumer electronics to automotive. The integrated gas gauge within the device provides accurate fuel gauging over many charging sessions. Furthermore, the device has several key features such as short-circuit protection, over-voltage and over-current protection and SpikeSuppressionTM, which helps protect the battery from voltage and current spikes, making it an ideal choice for many applications.

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