TOP224GN-TL

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Power management integrated circuits (PMICs) are used to design and manage the various power requirements of the system. Specifically, a PMIC contains various kinds of converters or switchers, dedicated to provide the power needed for different parts of the system. Nowadays, PMICs have become an integral part of many electronic systems because of their reduced size and cost, and their improved performance. The TOP224GN-TL is one such type of PMICs, belonging to the family of AC/DC converters and Offline Switchers.

TOP224GN-TL is an offline quasi-resonant regulator mainly used for LED lighting and general purpose AC/DC applications. This converter utilizes the quasi-resonant (QR) control mode to achieve a high performance, low cost, and simple, compact offline power supply design with respect to other topologies. It consists of a primary side controller, a high-voltage start-up regulator, a power switch, and a low side rectifier.

TOP224GN-TL’s working principle can be summarized as follows. The primary side controller is a high frequency oscillator that generates a square wave signal with an adjustable duty cycle, which is then used to turn on and off an N-Channel MOSFET power switch on the secondary side. This switch is connected in series to the primary side output capacitor, and the current through this capacitor is controlled by the duty cycle of the signal. The current source that is produced at the capacitor’s terminal provides the power to the load on the secondary side. In this stage, the load is isolated from the primary side, which prevents the power from being dissipated by the signal.

When the primary-side voltage is below the minimum input voltage, the low-voltage start-up regulator comes into play, turning on the P-Channel MOSFET at a certain voltage. When the voltage reaches its peak, the low-voltage start-up regulator turns off the MOSFET and begins the power conversion process.

The isolated low-side rectifier ensures that the voltage is free from any noise and this ensures the load gets the required power without any noise affecting it. The rectifier also includes a line sense circuit which, in turn, provides the necessary under-voltage lockout and maximum power transfer point for the primary side.

TOP224GN-TL can be used in various applications, such as notebook adapters, LED TV sets, LED lighting, and general purpose AC/DC converters. This PMIC provides features such as high power efficiency, low power consumption, low component count, and high component reliability. Furthermore, the device is capable of operating at a wide range of input voltages, from 90 VAC to 265 VAC, and offers an output power range of 30 watts to 120 watts.

In conclusion, the TOP224GN-TL is an innovative PMIC designed to operate in the field of AC/DC converters and Offline Switchers. With its high power efficiency, low power consumption, and low component count, it is considered a great choice for LED lighting and general purpose AC/DC applications.

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