TL494 600Watt Regulated Switch Mode Power Supply 2-30V 0-20A

TL494 SMPS Buck Converter Complete Circuit Diagram

TL494 adjustable regulated Switching mode power supply circuit diagram electrobuff.blogspot.com

Hi. In this video I'll show you how to make a Regulated high current switch mode power supply based on the TL494 PWM IC and P-channel power MOSFETS. The output voltage can be adjusted from 2-30V, and the current from 100mA to 20A.
The circuit is basically a beefy Buck Converter (Regulator) DC to DC power supply.
A buck converter is a type of DC-to-DC power converter that steps down (reduces) the input voltage to a lower output voltage. It is also known as a step-down converter. Here's a brief explanation of how a buck converter works:

Input Stage: The buck converter takes a higher input voltage and feeds it into a switch (usually a transistor). The input voltage is typically from a DC source, such as a battery or an external power supply.

Switching Action: The switch in the buck converter is rapidly turned on and off. When the switch is on, current flows through an inductor, storing energy. When the switch is off, the inductor releases the stored energy.

Inductor and Energy Storage: The inductor is a key component in the buck converter. When the switch is closed, the inductor builds up a magnetic field and stores energy. When the switch is open, the inductor releases this energy to the output.

Diode: In parallel with the inductor, there is a diode that allows the inductor's energy to flow to the output when the switch is open. This diode prevents backflow of current.

Output Stage: The output is taken from the circuit during the times when the switch is off. The output voltage is regulated by adjusting the duty cycle of the switch (the ratio of on-time to off-time).

Filtering Capacitor: A capacitor is often connected at the output to smooth the voltage and reduce ripple.

By controlling the duty cycle of the switch, the buck converter can efficiently step down the input voltage to provide a stable output voltage. The efficiency of buck converters is generally higher compared to linear regulators, making them popular for various applications where power efficiency is crucial, such as in battery-powered devices and electronic systems.

Watch my YouTube Video Tutorial

https://youtu.be/_CSTrUTdELc?si=RBeyZx2rmzn3XRCN