Reference Design for 20W Power Adapter Based on TNY290PG

Probe domestic double-head probe 038-BB-5.7L The shape of the two ends of the needle is outside the pointed needle

Summary:

This engineering report describes the universal input 5V/4A power adapter designed for the TinySwitch-4 family of TNY290PG devices. Although this is designed for the auxiliary and biasing of power adapters for personal computers (PCs), it can also be used as a general TinySwitch. -4 device evaluation platform.

20W power adapter PCB board

Overvoltage protection circuit diagram

Precision overvoltage protection detection circuit diagram

Self-locking precision overvoltage protection detection circuit diagram

20W power adapter pcb layout

See the PDF document for details (click on the PDF file to download)