BQ24025DRCR

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Power management integrated circuits (PMICs) are an essential component used for the design and production of electronic products. PMICs integrate discrete components such as voltage regulators, power converters, voltage multipliers, communication interface modules, and analog switches into a single device. PMICs provide the necessary electrical power control, monitoring, and protection required by applications. Battery chargers are a critical component of PMICs, playing an important role in the design of electronic products, as they are a key source of power for portable electronics.

BQ24025DRCR is a battery charger PMIC developed by Texas Instruments. It is used to charge Lithium ion (Li-Ion) and Lithium-Ion polymer (Li-Ion Polymer) batteries in portable electronic products, such as cell phones, MP3 players, digital cameras and digital audio players. The BQ24025DRCR integrates a low dropout voltage regulator (LDO), a 350mA battery charger, a fast-charge termination circuit, and auto-mode reset. It requires few external components for a complete charging circuit.

The BQ24025DRCR has a wide variety of applications, including single-cell Li-Ion/Li-Ion Polymer battery charge applications in portable electronic products. This PMIC can also be used to develop fast charging with high charging current using low voltage power sources such as USB, with or without the use of an external battery. It is also suitable for low power applications with a low quiescent current and standby power.

The BQ24025DRCR features a unique architecture that enables the charging current to be set externally to optimize the charging cycle. The current level can be set through the SET pin voltage. It supports fast charging mode and a low AC ripple charger mode. In addition, it also has an automatic reset mode that can restart the charging cycle from the beginning when equipped with a sensing circuit.

The working principle behind the BQ24025DRCR is based on the Buck Converter topology and is implemented in a two-stage architecture. The first stage is a fixed-frequency pulse width modulation (PWM) DC-DC converter which regulates the output voltage to a constant 4.2V or 4.3V. The second stage is a current regulated buck converter, with adjustable current and voltage. This buck converter takes the main regulated output of the first stage as the input and supplies a regulated charging current to the battery.

The BQ24025DRCR also includes a battery temperature monitor, which is used in conjunction with the adjustable charge current. This can reduce the current in the event of an increase in battery temperature, or increase the current when the temperature is lower. This feature ensures a safe and reliable battery charging process.

In conclusion, the BQ24025DRCR is a highly integrated and efficient PMIC suitable for a variety of battery charging applications. It has a wide variety of features and functions, including adaptive current control, temperature compensation, and low quiescent current that make it an ideal solution for portable electronic products. Therefore, the BQ24025DRCR is a suitable choice for applications requiring a reliable and cost-effective battery charging solution.

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