A slightly improved version of the previously shared ” 19V 4.7A DCDC Converter for Laptop PC ” UC3843D integration is used for PWM control , many materials SMD type PCB size is used instead of small E-type transformer ring core.
For the circuit experiment, the output filter coil in the desktop computer power supplies can be used as a nose, but it is necessary to check and rewind the measurements. DCDC Coil power used in the inverter circuit 5A value 45μH 1mm coil about 32 turns wrapped loop inner ring diameter 13.7mm outer 22.1mm width 8mm ( information on page 34 in the PDF file )
UC3843D DC DC Converter Supply voltage: 9-15V DC Output voltage: 19V DC Max. Output current: 4.5A overcurrent protection Restricted over R8 resistor. The ACER Laptop is equipped with detailed test and measurement measurements graphs and values.