3.5V-25V high current adjustable power supply circuit - Power Circuit - Circuit Diagram

Probe for current and voltage pin, with dimensions 420x4450mm, featuring a 5.0mm head diameter. It also supports overcurrent and voltage protection.

MOS power ICs covering the full range of applications.

Adjustable capacitor from Murata, ensuring genuine quality and reliability.

1.5PF SOT23-6 low capacitance component, with a breakdown voltage of 5V and a surge voltage rating of 6V (SRV05).

Inductance component for various electrical applications.

Component Selection:

Transformer T should be selected as 80W to 100W, with an input of AC220V and an output of dual windings at AC28V. Fuse FU1 should be 1A, while FU2 should be chosen between 3A to 5A. VD1 and VD2 can use 6A02 diodes. Potentiometer RP should be around 1W, with a resistance range of 250K to 330K. Capacitor C1 should be a 3300µF/35V electrolytic capacitor, C2 and C3 should be 0.1µF monolithic capacitors, and C4 should be a 470µF/35V electrolytic capacitor. Resistor R1 should be between 180 to 220Ω, with a power rating of 0.1W to 1W. Resistors R2, R4, and R5 should be 10KΩ, with a power rating of 1/8W. Transistor V1 should be a 2N3055, V2 should be a 3DG180 or 2SC3953, and V3 should be a 3CG12 or 3CG80.

These components have been carefully selected to ensure optimal performance and safety in your electronic projects. Proper selection and handling of these parts will help you avoid potential issues and achieve the desired results efficiently. Always refer to the datasheets for detailed specifications and compatibility checks before implementation.