BQ24115RHLR

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The BQ24115RHLR is a high performance battery charger IC from TI. This device is a part of TI’s product line of PMIC - Battery Chargers, designed for recharging and providing power to customer systems needing high performance and low power consumption. The BQ24115RHLR integrates over-voltage, under-voltage, over-current and over-temperature protection, making it suitable for a wide variety of battery charging applications.

As a PMIC – Battery Chargers, the BQ24115RHLR can be used in a variety of applications, including smartphones and tablets, as well as low power wireless devices. It is suitable for providing adaptable power regulation and charge control using a wide variety of sources, such as USB and wall adapters. By using a buck-boost configuration, the BQ24115RHLR can provide voltage regulation from 4V to 6.0V, allowing for a higher input voltage range than commonly used buck-boost converters.

The BQ24115RHLR is a complete power delivery solution that does not require the use of an external Power FET. Instead, this IC provides integrated Power FETs which makes it easy to design, reduce the size and cost of the system and also helps to increase efficiency. With its advanced parasitic resistance function, the BQ24115RHLR can detect parasitic conditions and automatically reduce the input current. Additionally, the BQ24115RHLR includes other advanced features, such as a programmable thermal shutdown and input current limit, over-discharge current protection and charge status indication.

The working principle of the BQ24115RHLR is fairly straightforward. The device contains two main components: a primary power output and a secondary control output. The job of the primary power output is to supply the controlled output voltage to the battery. The secondary control output utilizes a low noise PWM controller to control the output voltage of the primary power output. The PWM is dependent on the voltage feedback from the battery, which appears at the APS pin. When the battery voltage is lower than the desired charging voltage, the PWM activates and increases the voltage from the primary output, sending more current to the battery. Conversely, when the battery voltage is higher than the desired charging voltage, the PWM controller decreases the output from the primary power output, reducing the current flow from the battery.

The BQ24115RHLR also provides for current monitoring, allowing for the battery charge level to be determined. By measuring the current consumed by the battery, the BQ24115RHLR can accurately determine the available charge. This information can then be used by a system to optimize power consumption or to determine the battery\'s remaining capacity.

The BQ24115RHLR provides multiple protection features to ensure safe operation. The device includes over-current protection, reverse current protection, over-temperature shutoff, and a timeout watchdog to ensure the system is running properly. The device also includes a programmable safety timer to control the maximum charging time and a temperature guard band feature to maintain temperature-activated charging levels.

By combining multiple features into one integrated package, the TI BQ24115RHLR is an excellent choice for a wide variety of battery charging applications, from small handheld devices to large-scale industrial systems. With its advanced features and high performance capabilities, the BQ24115RHLR is designed to help improve system performance and reliability while reducing system power consumption.

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