This is the circuit diagram of 3A switching power supply regulator:
Simple and cheap, the circuit built based on well-known IC regulator LM317 with current booster of power transistor 2N3782. Don’t forget to add heatsink especially for power transistor 2N3782.
A switching power supply is a type of power supply that uses electronic switches to control the flow of electrical energy. Unlike linear power supplies, which regulate the output voltage by dissipating excess energy as heat, switching power supplies are more efficient because they switch the input voltage on and off at a high frequency.
Switching power supplies are widely used in electronic devices, computers, telecommunications equipment, LED lighting, and other applications where efficiency, size, and weight are critical considerations. However, they can introduce electrical noise, and careful design is required to minimize electromagnetic interference (EMI).
