BQ 25A

The BQ25A is a high-efficiency, synchronous buck battery charger from Texas Instruments. It is designed to charge one, two, three, or four series lithium-ion (Li+) cells. The BQ25A has a number of features that make it ideal for a wide range of applications, including:

• High efficiency: The BQ25A can achieve efficiencies of up to 95%, which helps to extend battery life and reduce heat generation.
• Programmable charge parameters: The BQ25A allows the user to program the input current, charge current, and charge voltage. This flexibility allows the charger to be optimized for a specific application.
• SMBus interface: The BQ25A has an SMBus interface that allows the system microcontroller to communicate with the charger and configure its settings.
• Automatic power source selection: The BQ25A has two charge pumps that can be used to drive separate N-channel MOSFETs. This allows the charger to select the best power source for the application, such as a USB port or a wall adapter.

The BQ25A is available in a small QFN package, making it ideal for space-constrained applications. It is also RoHS compliant and meets all major safety standards.

Here are some examples of applications where the BQ25A can be used:

• Portable electronics, such as smartphones, tablets, and laptops
• Wearable devices, such as smartwatches and fitness trackers
• Industrial equipment, such as bar code scanners and handheld terminals
• IoT devices, such as smart thermostats and security cameras

The BQ25A is a versatile and powerful battery charger that can be used in a wide range of applications. It is a popular choice for designers who need a high-efficiency, programmable charger with a small footprint.