BQ24125RHLR Integrated Circuits (ICs)

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BQ24125RHLR Application Field and Working Principle

Power Management Integrated Circuits (PMICs) are a type of integrated circuit (IC) that can manage and regulate one or multiple power sources for a wide variety of applications. Battery chargers are one of the commonly used PMICs and are designed to provide efficient charging for many types of batteries. The BQ24125RHLR is an example of a PMIC battery charger. This article looks into the application field and working principle of the BQ24125RHLR.

Application Field

The BQ24125RHLR is a low-cost battery management IC that is widely used in industrial and consumer applications where battery charging safety and performance are important. The IC is suitable for a variety of battery types, ranging from single cell lithium-ion/polymer to four cell lead acid batteries. It can be used in mobile phones, personal electronics and notebook computers, as well as other portable electronic devices.

The BQ24125RHLR has high-efficiency and low power dissipation, which makes it suitable for use in applications where battery charging performance and power saving are critical. Furthermore, it can be used in battery charging systems with input voltages of up to 20V, and is supported by a range of safety features and protection functions. This makes it ideal for applications where safety is of paramount importance.

Working Principle

The BQ24125RHLR is a synchronous battery charger with a step-down topology. It uses a linear regulator operating in step-down mode to transfer power from an input voltage to an output voltage in a controlled manner. This controlled power transfer is achieved by employing a series of switches and current limit circuitry. Once the input voltage exceeds the output voltage, the IC will start to charge the battery.

The BQ24125RHLR is designed to provide the most efficient and reliable charging for the connected battery. It can be programmed to provide either constant current or constant voltage charging. This allows the optimisation of charging parameters to suit the needs of the connected battery and application. Furthermore, the output voltage is accurately regulated, and the IC is equipped with a range of safety and protection features, such as over-voltage protection, over-temperature protection, under-voltage lockout, and short-circuit protection.

In summary, the BQ24125RHLR is a low-cost, high-efficiency battery charger IC with a synchronous step-down topology. It supports a wide range of battery types and can be used in a range of applications. It is capable of providing both constant current and constant voltage charging, and is equipped with a range of safety and protection features.

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