Overview of Design Examples of AC/DC Non-isolated Buck Converters
voltage - 230V AC to 5V DC converter, lossless - Electrical Engineering Stack Exchange
TPS64203 - non-isolated AC/DC buck converter with no transformer - Power management forum - Power management - TI E2E support forums
AC DC 5V 1A 1.5A 500mA 1000mA Power Supply Precision Buck Converter AC 220V to 5V DC Step Down Module Adaptor Transformer|down converter|step buck converterconverter buck - AliExpress