BQ2004EPN

The BQ2004EPN is a highly integrated, one-cell Li-ion battery charger, designed to charge and maintain lithium−ion and LiPo 3.2/4.2 V batteries. It provides all of the necessary features for one−cell batteries, including over−current power−path protection, under−voltage lock−out, thermal fold-back, reverse−battery protection, and pre−charge features shared between the switch−mode power supply and the secondary−side pre−charge. All of these features make the BQ2004EPN an ideal solution for a variety of industrial and power−supply applications.

The BQ2004EPN is a fully integrated device and has proven to be extremely efficient in its application field. It utilizes a switched−mode power supply with current−mode control to maximize efficiency while minimizing power−supply output ripple. The device also features over current and short−circuit protection, under voltage lock−out, thermal fold−back, reverse battery protection and pre−charge protection, all built−in.

The BQ2004EPN can be used in a variety of power−supply designs, with the key advantage being the reduced need for energy management circuitry in the system. With its integrated control, the device does not require external gate drive or feedback components and can be used without any external components for most applications. Additionally, the device offers an integrated sense−resistor that allows for precision current−level regulation.

The BQ2004EPN also offers advanced features such as using a thermistor to measure the temperature of the battery and adjust the charging current accordingly. This helps protect the battery from damage due to temperature−related issues and boosts efficiency by ensuring only the necessary power is used. Additionally, the device includes reverse−polarity protection which prevents any damage caused by incorrectly connecting the battery.

The BQ2004EPN has been designed with reliability and flexibility in mind, offering high−end performance and superior robustness. By incorporating an array of safety features and a simple, efficient design, the BQ2004EPN is an optimal solution for any type of battery−based system.