BQ20Z90DBT-V110

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Power Management Integrated Circuits, or PMICs, play a critical role in digital designs. They are used to control and manage the power on a system-wide basis, and ensure that the power is delivered in an efficient and reliable manner to all of the components in the device. The BQ20Z90DBT-V110 is a Wide Input Voltage, High Current, Single-Cell NiMH and NiCd Battery Charger from Texas Instruments.

The BQ20Z90DBT-V110 fits into the Battery Management PMIC category. This device is designed for single cell NiMH and NiCd battery charging applications such as high-end consumer electronics, handheld devices, cellular phones and portable hand-held instrumentation. It provides high accuracy and fast-charging capabilities, with a wide input voltage range of 2.7 V to 5.5 V.

The primary purpose of the BQ20Z90DBT-V110 is to charge NiMH or NiCd batteries. It contains both a constant-current/constant-voltage (CC/CV) algorithm and a timer algorithm to safely and accurately charge the battery. The CC/CV algorithm regulates the amount of current jumping into the battery and helps to limit the maximum battery voltage. The timer algorithm allows the user to set a certain timer period in which the charger will reliably and efficiently charge the battery.

The BQ20Z90DBT-V110 is equipped with several features that maximize the charging of single cell NiMH and NiCd batteries. It has a built-in current limit feature that provides precise control of charge current by limiting the maximum allowable current that can pass through the charging circuit. It also has a separate constant-voltage (CV) charge algorithm, which keeps the battery at a constant voltage during the charges.

The BQ20Z90DBT-V110 includes several safety features. It includes an over-voltage protection feature that shuts down the system when the battery voltage rises above the pre-defined level. It also has an over-temperature protection feature, which monitors the temperature of the battery during charging and prevents it from entering unsafe levels. In addition, it has an overtemperature thermal foldback feature, which decreases the charge current when the battery temperature reaches a certain threshold, thus protecting the battery from over-current and over-voltage conditions.

Another key feature of the BQ20Z90DBT-V110 is its high-voltage charge termination. This feature effectively monitors the battery voltage and automatically terminates the charge cycle when the pre-defined voltage level is reached. This prevents the battery from becoming overcharged, thus extending its life and maximizing its performance.

The BQ20Z90DBT-V110 is a reliable and efficient charger for single cell NiMH and NiCd batteries. Its wide input voltage range, accurate current limit feature, and high-voltage charge termination make it well-suited for the demanding applications found in modern consumer electronics. Its advanced safety features ensure a safe, efficient, and reliable charge for your batteries.

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