BQ2002FSN

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PMIC - Battery Chargers come in a variety of forms and serve numerous functions. The BQ2002FSN is one example of a multi-function Power Management IC (PMIC) charged with the task of charging and protecting a variety of batteries. The BQ2002FSN is best suited for use with single cell Li-Ion or Li-Polymer battery systems but is also compatible with other similar battery chemistries. It is designed for use with a wall adapter as its primary power source, allowing a wide range of input voltages from 3.2V to 14V. The maximum charger current is 2.1A but can be adjusted using external components like resistors and capacitors.

The BQ2002FSN’s output is adjustable from 4.1V to 4.4V, making it suitable for a variety of batteries and applications. The device’s working principle is based on the battery’s voltage monitoring and charging cycles. Initially, the battery will be monitored at a constant current until the battery reaches its maximum charging voltage. At that point, the charger will switch over to a constant voltage mode, supplying a regulated output voltage until the battery reaches its full charge level. The device includes an array of safety features that allows it to safely deliver power even with the most demanding of applications.

The BQ2002FSN also features a wide range of user-configurable functions, including an adjustable charge current limit, adjustable charge termination levels, adjustable pre-charge current, adjustable maximum and minimum peak current, selectable fast and slow charge rates, and adjustable charge temperature. This level of user-adjustability allows for the optimal operation of the device in any environment and across any system configuration. The BQ2002FSN is also highly efficient, with a minimum of 90% efficiency at a VIN of 4.2V and maximum efficiency of 98% at a VIN of 12V. This helps minimize system power losses and helps keep installations cost-effective.

In summary, the BQ2002FSN from TI is an excellent PMIC - Battery Charger for a wide range of battery chemistries and applications. Its ability to adjust its input and output voltages allows for optimal operation across a variety of voltage, temperature and environmental conditions. Its user-configurable features, high efficiency and safety features make it ideal for many battery charging tasks and its flexible input voltage range makes it a great choice for powering a wide range of applications.

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