AC to DC 90 Watt Switching Power Adaptor PCB

An AC to DC switching power adapter circuit with a maximum output power of 90W. The switching power supply is constructed using a high voltage power switching regulator IC, the MC33374, along with several additional components. The MC33374 IC is a monolithic high voltage power switching regulator specifically designed to operate directly from a rectified AC line, making it suitable for flyback converter applications. This switching power adapter integrates the required converter functions with a unique programmable state controller. It can deliver up to 6 A of current at an output voltage of 15V across various variable AC inputs. The adapter is capable of providing output power exceeding 150W with a fixed AC input of 100V, 115V, or 230V, and exceeding 90W with a variable AC input ranging from 85V to 265V.

The AC to DC switching power adapter circuit utilizes the MC33374 high voltage power switching regulator IC, which is pivotal in ensuring efficient conversion from AC to DC. The design incorporates a flyback topology that allows for isolation and step-down of voltage, making it suitable for various applications requiring stable DC output. The flyback converter operates by storing energy in a magnetic field during the "on" phase of the switching cycle and releasing it during the "off" phase, effectively converting the high voltage AC input into a lower voltage DC output.

The MC33374 is equipped with features such as over-voltage protection, under-voltage lockout, and thermal shutdown, enhancing the reliability and safety of the power supply. The programmable state controller within the IC allows for dynamic adjustment of the output parameters based on the load conditions, which optimizes performance and efficiency.

The output specifications of the adapter are noteworthy; it can handle a maximum current of 6 A at 15V, making it suitable for powering devices that require significant current draw. The ability to operate over a wide range of AC input voltages, from 85V to 265V, ensures compatibility with various electrical systems globally, making this power adapter versatile for international use.

In summary, this AC to DC switching power adapter circuit represents a robust solution for applications demanding reliable power conversion, with its high efficiency, extensive input range, and advanced protective features. The integration of the MC33374 IC and the flyback converter topology ensures that it meets the rigorous demands of modern electronic devices while maintaining a compact form factor.AC to DC switching power adaptor circuit with maximum output power of 90W. Switching power supply is built using a high voltage power switching regulator IC MC33374 and some other additional components. The MC33374 IC is a monolithic high voltage power switching regulators that are specially designed to operate directly from a rectified AC line so

urce, and in flyback converter applications. The MC33374 switching power adaptor combines the required converter functions with a unique programmable state controller. At various variable AC inputs, it is capable of serving up to 6 A current at 15V output voltage. This switching power adaptor is capable of providing an output power in excess of 150W with a fixed AC input of 100V, 115V, or 230V, and in excess of 90 W with a variable AC input that ranges from 85V to 265V.

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