Simple SMPS, 85-265VAC Input with Output 12VDC @ 750mA
https://www.electronics-lab.com/project/simple-smps-85-265vac-input-with-output-12vdc-750ma/
This is a compact Switch-Mode Power Supply (SMPS) using the TNY266 chip for cost-effective solutions like power adapters and LED drivers. It includes a rectifier, TNY266 switch, and PC817 optocoupler feedback. It requires no auxiliary power.
Universal Input AC/DC Switching Buck Regulator – 85V -265V AC Input – 5V/150mA DC Output
https://www.electronics-lab.com/project/universal-input-ac-dc-switching-buck-regulator-85v-265v-ac-input-5v-150ma-dc-output/
The project presented here is a universal input AC/DC switching buck regulator with ultra-low standby power that is capable of delivering up to 2.5W output power. The RAA223012 chip is the heart of the project which combines constant off-time control for heavy load and Pulse Frequency Modulation (PFM) for light-load operation. Constant off-time controls switching […]
Universal AC Voltage Step-Down Power Converter – 18V DC Output From 85-265V AC Input
https://www.electronics-lab.com/project/universal-ac-voltage-step-down-power-converter-18v-dc-output-from-85-to-265v-ac-input/
The project described here is an off-line universal AC Voltage input step-down regulator that provides accurate constant voltage (CV) output, outstanding low standby power, high efficiency at light load, and excellent dynamic response based on non-isolated buck topology. The project is built using the AP3928 chip. The project provides 18Vdc output @ 250mA from AC […]
230V AC Input – 12V Output DC Converter, Non-Isolated Buck Converter
https://www.electronics-lab.com/project/230v-ac-input-12v-output-dc-converter-non-isolated-buck-converter/
The project described here outputs 12V DC voltage from the input of 230V AC. The output current is up to 100mA. The project is based on BM2P129TF chip which is PWM method DC/DC converter with a built-in 650V MOSFET. BM2P129TF contributes to low power consumption by built-in a 650V starting circuit. Built-in current detection resistor […]