TOP248FN

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Power Management Integrated Circuit (PMIC) is an integrated circuit (IC) that contains electrical circuits and electronic logic used to convert, control, and regulate the power of electronic devices. There are many types of PMIC, including AC DC converters, offline switchers, active rectifiers, and more. One of the most useful types of PMIC is the TOP248FN, which is an integrated offline switcher IC designed for high voltage, low power applications.

TOP248FN is designed to provide an efficient and cost effective solution for powering small electronics such as controllers, sensors, wearable devices, and IoT equipment. It combines high power efficiency, low component count and small size, making it a great choice for electronic applications that require small form factor. The device has a wide input voltage range, from 4.5V to 12V, and can operate at up to 2A. It’s shielded from electro-static discharge (ESD) and is qualified for AEC-Q100 automotive application.

TOP248FN\'s Application Field

• Automotive Electronics: TOP248FN is designed to meet the demanding requirements of automotive applications, and is qualified for AEC-Q100.
• Household Electronics: TOP248FN is used in a wide range of household electronics such as TVs, air conditioners, washing machines, and more.
• Battery Charging: TOP248FN features an efficient power conversion and is capable of charging most types of batteries.
• LED Driver: TOP248FN can be used to drive high-brightness LED and other power lighting applications.
• Power Adapter: TOP248FN can be used in AC to DC and DC to DC power adapter applications.
• Smart Home and Wearable Devices: TOP248FN is suitable for powering low power and low voltage smart home and wearable devices.

TOP248FN Working Principles

TOP248FN is an offline switcher, which means it switches an AC or DC voltage from a power source to the output rather than relying on a connection to the AC grid or a battery. Starting from a low power state, the IC is powered using a standard resistor-capacitor (RC) circuit. As the voltage on the capacitor rises, the internal power MOSFET is turned on, allowing current to flow to the output. When the output voltage reaches the desired level, the internal control circuit will turn off the MOSFET and the voltage on the capacitor will start to drop.

The output voltage is controlled by controlling the ON and OFF times of the MOSFET. The longer the ON time, the higher the output voltage. The small size and light weight of TOP248FN makes it suitable for use in many portable applications.

To improve power efficiency, TOP248FN features a brown-out function that reduces the on time of the internal MOSFET when the output voltage is low. This ensures that the output voltage remains within specifications and avoids excess power consumption. TOP248FN also includes a number of protection functions such as overload, over-voltage, over-temperature, and under-voltage protection to ensure reliable operation and long lifetime.

In summary, TOP248FN is a highly efficient and cost-effective integrated offline switcher device designed for low power and small form factor electronics. It is ideal for applications such as automotive electronics, LED driver, smart home and wearable devices, and power adapters. It offers a wide input voltage range, high power efficiency, and excellent load regulation.

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