30W micro switch regulated power supply composed of TOP224Y

This document presents a 30W micro switch regulated power supply utilizing the TOP224Y integrated circuit. The circuit diagram illustrates its design. A notable feature of this power supply is the use of the TL431 component to replace the regulation tube VDz2 in the sampling circuit. This modification allows the power supply to achieve its technical specifications by employing a high stability bandgap reference voltage (Uref) in place of a standard Zener diode.

The 30W micro switch regulated power supply is designed around the TOP224Y, a versatile device that integrates a high-voltage power MOSFET with a PWM controller. This configuration allows for efficient power conversion with minimal heat generation. The circuit operates by converting AC voltage to a regulated DC output, making it suitable for various applications requiring stable power.

The TL431 serves as a precision voltage reference and error amplifier in this design. By replacing the traditional Zener diode with the TL431, the circuit benefits from improved voltage regulation characteristics and enhanced stability across varying load conditions. The TL431 operates by comparing the output voltage to a reference voltage and adjusting the feedback loop to maintain the desired output level. This results in a more reliable performance, especially under fluctuating input voltages or load changes.

The overall circuit design includes essential components such as input capacitors for filtering, output capacitors for stability, and inductors for energy storage and smoothing. The use of feedback mechanisms ensures that the output remains constant despite variations in input voltage or load current, thereby meeting the demands of sensitive electronic devices.

In conclusion, the 30W micro switch regulated power supply utilizing the TOP224Y and TL431 presents a modern solution for efficient power management in electronic circuits. Its design emphasizes stability, reliability, and performance, making it an ideal choice for a wide range of applications.Here we introduce a kind of 30W micro switch regulated power supply composed of TOP224Y, its circuit is shown in the diagram. Its feature is using TL431 to replace regulation tube VDz2 in the sampling circuit. That is, it can reach the technical target of micro switch power supply by using high stability band gap reference voltage Uref to replace normal zene..

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