MC33772BTA1AE

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PMIC (Power Management Integrated Circuit) is a popular integrated circuit used for power management applications. Amongst all the PMICs available, the MC33772BTA1AE is a particularly versatile power management Design that can be used in a variety of applications. This article provides an overview of the MC33772BTA1AE’s application field, as well as its working principle.

Application Field

The MC33772BTA1AE is a power management IC that is primarily used for battery management. It can be used to manage and monitor the charge level of a battery of any type, including Li-ion (Lithium Ion), Ni-Cd (Nickel Cadmium), Ni-MH (Nickel Metal Hydride), and Lead-acid batteries. Moreover, it is also suitable for use in applications that are not related to batteries, such as industrial and robotics applications.

The MC33772BTA1AE utilizes an analog-based architecture, allowing it to achieve high performance and superior accuracy. It also integrates several control algorithms, including multi-step charging, cold temperature compensation, idle state current measurement and estimation, and fast charge termination. Additionally, its automotive-grade design ensures that it can operate in a wide temperature range, up to -40°C to 125°C. This makes it suitable for automotive applications, as well as for medical, home automation, and consumer electronics applications.

The MC33772BTA1AE is capable of managing up to two battery cells in any combination of Li-ion, Ni-Cd, Ni-MH or Lead-acid batteries. It also supports two power supplies, allowing it to manage two battery banks at once. Furthermore, its advanced control circuitry allows it to achieve high accuracy measurements and charge levels.

Working Principle

The MC33772BTA1AE features a charge monitor, which is automatically triggered by the battery voltage. The charge monitor is then used to analyze the battery voltage and determine the charge level. If the measured voltage is lower than the programmed threshold voltage, the IC then initiates a charging cycle.

The MC33772BTA1AE can be used to manage two battery cells at once. When managing two batteries, the IC will monitor each cell\'s voltage separately and then decide which cell needs to be charged first based on the difference between their voltage levels. This ensures that the battery cells are charged separately and that the overall charge time is minimized.

When charging the battery, the MC33772BTA1AE utilizes an adaptive current control algorithm, which allows it to adjust the charge current according to the battery’s temperature, voltage and capacity. This ensures that the battery is charged safely and efficiently. Once the charge level has reached its maximum, the IC will then terminate the charging cycle to protect the battery from overcharging.

The MC33772BTA1AE also features an idle state current measurement, which prevents the battery from discharging when not being used. The current measurement is used to determine the amount of current being drawn from the battery and then automatically reduce the voltage supply to prevent the battery from discharging.

Finally, the MC33772BTA1AE also integrates a self-test and an open drain output, making it easy to use and integrate into any system. The self-test can be triggered by a timeout or an external watchdog timer, and the open drain output can be used to monitor the charging status of the battery.

In conclusion, the MC33772BTA1AE is a versatile and high performance PMIC that is specifically designed for battery management applications. It offers high accuracy and integrates several control algorithms to ensure that the battery is charged safely and efficiently. Moreover, its automotive grade design makes it suitable for applications that require operation in a wide temperature range.

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