FAN5307MPX

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The FAN5307MPX is an advanced member of Fairchild Semiconductor’s integrated high-efficiency, single-cell Li-Ion/Li-Polymer battery charger family. The chip integrates a synchronous buck regulator, a current-limited input charge pump, a high-accuracy adjustable current source, and a thermal loop that senses the die temperature. The FAN5307MPX regulates the charge current of the battery, and it is well suited for applications such as mobile phones, portable media players and digital cameras.

Features

The FAN5307MPX integrates two separate power switching transistors, a high side N-channel MOSFET and a low side N-channel MOSFET, which help to improve power efficiency and reduce solution size. The integrated MOSFETs can support up to 5A, allowing the FAN5307MPX to achieve a maximum total output current of 4A. Furthermore, the high side MOSFET can be connected to an external N-channel MOSFET, which enables the FAN5307MPX to deliver a maximum output current of 5A.

The FAN5307MPX also includes an adjustable current source for charging a single-cell Li-Ion/Li-Polymer battery. The device features adjustable input current limit and adjustable output current, allowing users to select an input current that is tailored to their particular application. Additionally, the FAN5307MPX features current read-back via the IOUT pin, giving users the ability to monitor the charge current in real time.

Furthermore, the FAN5307MPX features an integrated thermal loop that monitors the die temperature. This thermal loop will shut down the device if the die temperature exceeds a safe value to help protect the device from potential damage. Additionally, the thermal loop will shut down the device if the input voltage exceeds a certain level, helping to protect the device from potential damage.

Application Field and Working Principle

The FAN5307MPX is a single-cell Li-Ion/Li-Polymer battery charger that helps to improve power efficiency and reduce solution size. The device integrates two separate power switching transistors, a high side N-channel MOSFET and a low side N-channel MOSFET, which help to improve power efficiency and reduce solution size. The device also features an adjustable current source for charging a single-cell Li-Ion/Li-Polymer battery, adjustable input current limit and adjustable output current, allowing users to select an input current that is tailored to their particular application.

The FAN5307MPX is primarily used in applications such as mobile phones, portable media players and digital cameras. The device is a DC-DC switching regulator, meaning that it is used to convert one DC voltage level to another. The device takes in an input voltage, usually from a battery or power supply, and then uses switching transistors to raise or lower this voltage level to the desired output voltage.

The FAN5307MPX operates by switching the transistors at a switching frequency, typically around 500 kHz. When the MOSFETs switch, the current flow is restricted, creating two DC voltage levels: the input voltage and the output voltage. The components that the voltage passes through determine the output voltage, and the frequency at which the transistors switch control the current flow.

The FAN5307MPX also includes an adjustable current source for charging a single-cell Li-Ion/Li-Polymer battery. The current source is able to adjust the charge current, allowing users to specify the exact current that they need for their application. Additionally, the FAN5307MPX features current read-back via the IOUT pin, giving users the ability to monitor the charge current in real time.

The FAN5307MPX is a great choice for any application that requires a high-efficiency, single-cell Li-Ion/Li-Polymer battery charger. The device is easy to use and allows users to adjust the input current, output current, and charge current as necessary, ensuring that the device works with their particular application. Furthermore, the integrated MOSFETs can support up to 5A, allowing the FAN5307MPX to achieve a maximum total output current of 4A.

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