RT9525GQW

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RT9525GQW is a high efficiency, high accuracy, low voltage current monitoring battery charger IC. It integrates an 8-bit microcontroller, linear cell charger, and precision current sense amplifier in a single integrated circuit that is suitable for space-constrained applications. This battery charger allows for higher charging efficiency and accuracy compared to existing standalone solutions, making it an ideal choice for a wide range of products and applications that require reliable charging performance.

Features of RT9525GQW

• Wide input voltage range: 4.0V–22V
• High charging efficiency: ≥90% (at 3.7V and 500mA output, without external protection devices)
• Low quiescent current (<16 μA)
• High current sense accuracy: ±15mV
• OD-protected battery current sensing
• Over-voltage, over-current and short-circuit protections
• Soft-start & Voltage Boost
• Integrated buck DC-DC converter with 1A switch
• Integrated switching detector
• Thermal protection

Operating Principle

RT9525GQW works as a smart battery charger. It has a built-in 8-bit microcontroller that monitors the battery voltage, current and temperature during charge. The microcontroller reads signals from the battery and then adjusts the charging parameters accordingly. The user can also set the charge parameters and configure the charger for a specific application.

The battery charger consists of a buck DC-DC converter and a current-sensing amplifier. The buck converter has an input voltage range from 4.0V to 22V and a preset output voltage of 3.7V. It can deliver up to 1A output current. The current-sensing amplifier senses the battery current and adjusts the charging parameters in response. The sensing amplifier also protect against over-voltage, over-current and short-circuit conditions.

The RT9525GQW has a thermal protection which monitors its die temperature. When the die temperature exceeds a certain set point, the charger will automatically adjust the output parameters accordingly to reduce the power dissipation and protect the device from thermal damage.

Application Fields

RT9525GQW is well-suited to a variety of applications that require reliable charging performance and high efficiency. It can be used for single cell Li-Ion, Li-Po and NiMH batteries in a variety of products such as portable devices, digital cameras and handheld devices. RT9525GQW can also be used in automotive applications, such as car audio, navigation systems and remote control vehicles, where reliable charging and high efficiency are important.

In summary, the RT9525GQW is a high efficiency, high accuracy, and low voltage battery charger IC suitable for a wide range of applications that require reliable charging performance. It combines high efficiency, accuracy and protection with ease of use. It is ideal for space-constrained applications and is well-suited to a variety of products and automotive applications that require reliable charging and high efficiency.

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