BQ25895MRTWR

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PMIC - Battery Chargers refer to integrated circuits that provide charging and maintenance of single-cell lithium-ion and Lithium-polymer batteries. The Texas Instruments BQ25895M is an integrated linear charger and system power path management device for small, space-constrained, high-power-density applications. It supports the Li-Ion/Li-Pol battery and can support up to 5A current charging. This IC is designed to minimize board space, reduce system parts count and save manufacturing costs, making it ideal for a variety of applications like portable electronics, automotive applications, and computing, and communication systems.

The BQ25895MRTWR integrates a highly efficient linear charger and power path manager, and provides up to 4A charge current, USB Type-C compatibility, and key safety features. This device can be used for fast charging of various battery types, and is compatible with both USB Type-C devices and those using the Boost Charge™ Technology from Texas Instruments. It also offers a high level of safety, with reverse current protection, input/output overvoltage protection, and thermal shutdown.

The working principle of the BQ25895MRTWR is based on a efficient charge current control method. When the output voltage of the power adapter is higher than the battery voltage, the device will apply current so that the output voltage of the power adapter approximates the voltage of the battery. According to the application, the device can be used as a linear charger or as a buck-boost converter. The controller adjusts its current sense resistor, keeps the output voltage approximately equal to the battery voltage, and then maintains the output current at the desired charging value.

The BQ25895MRTWR is designed specifically for portable applications, such as cell phones, hand-held gaming systems, digital cameras, and portable audio players, which require high power densities and need a very small form factor. It includes a system management controller, a Li-Ion/Li-Pol linear charger and a boost converter. It supports over-voltage and over-temperature protection, reverse current protection, input/output overvoltage protection, and thermal shutdown. The device offers adjustable input and output current limits, battery preconditioning, and five programmable charge profiles. The BQ25895MRTWR is also compatible with the USB Type-C and Boost Charge™ protocol.

In summary, the Texas Instruments BQ25895MRTWR is a highly efficient linear charger and system power path management device for small, space-constrained, high-power-density applications. It is ideal for a variety of portable applications, offering high levels of safety, wide range of compatible protocols, and adjustable input andoutput current limits. This efficient charge controller can be used as a linear charger or as a buck-boost converter, and provides up to 4A charge current.

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