60 Watt Laptop Battery Charger

The circuit is designed for laptop battery charger with 20V output voltage. This circuit uses TOP 246 Y made ​​by Power integrations. TOP 246 Y eliminates half the discrete components compared with the UC3842. As promised Power Integration, this IC is more reliable, has a smaller form, reducing the time in designing and saving costs.

Battery charger characteristic :
Input Voltage AC : 85 … 265V (universal input);
Overall efficiency at 85V AC power is not less than 79%;
Overall efficiency at 265V AC power is not less than 84%;
Output voltage DC : 20V;
Maximum load current : 3A.

Parts list :

Building guide : radiokot.ru