BQ29311PWG4

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The BQ29311PWG4 from Texas Instruments is a low dropout linear battery charger and power selector with four power outputs and low-resistance pass elements. It supports four selectable fixed voltage and current outputs making it suitable for applications such as mobile phones, tablets, media players, and Bluetooth headsets. Specifically, it can deliver up to 2A at 3.7V, 2.6A at 5V, 2A at 9V, and 4.5V at 4A. It also supports a 60mV input voltage dropout to provide a reliable, consistent output power across the entire operating range.

The BQ29311PWG4 is part of Texas Instruments\' Power Management IC (PMIC) portfolio. PMICs are integrated circuits that enable the efficient delivery of power from the limited power sources of today\'s portable devices. BQ29311PWG4 is classed as a Battery Management PMIC as it provides an integrated solution for charging, discharging, and protecting batteries. This device combines the features of a Battery Charger and a Power Selector in a single integrated circuit.

The BQ29311PWG4 features an integrated thermal sensor to control the charging temperature, allowing the device to quickly shut down in cases of overcurrent or pathological thermal events. The device is also able to detect the battery\'s overvoltage and zener diode breakdown conditions that could otherwise lead to safety incidents. The charger includes an internal current and temperature monitoring system to protect the battery cells. It contains reverse current protection, reverse discharge protection and short circuit protection-all of which provide added safety during charging and discharging operations.

The BQ29311PWG4 has separate charge termination and charge status logic outputs for each of its 4 channels. The low dropout linear architecture of the device eliminates the need for separate power stages in the power/charge manager circuit. The battery charger also supports high-resolution current and voltage regulation to optimize battery performance and battery life. The BQ29311PWG4 also supports a unified battery current monitor output.

Overall, the BQ29311PWG4 is a highly integrated power management IC suitable for battery charging and power selection applications in mobile, wearable, and portable electronics. It features an advanced power and charge management system that combines several functions into a single IC. It provides up to 4A of total output current and 4 selectable output voltages to meet the power needs of today’s mobile devices. The device also integrates a range of protection features as well as current and temperature sensing to ensure the safe and efficient operation of the battery in even the most challenging conditions.

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