The circuit begins with the AC input (usually 230V or 110V). Components like , fuses , and interference capacitors are placed here to protect the circuit from surges and filter out electromagnetic interference (EMI). PFC (Power Factor Correction) Stage
By sensing zero current, the IC reduces switching losses in the boost diode, leading to higher overall efficiency. a20112 power supply schematic
Provides galvanic isolation to keep the user safe from high-voltage AC mains. The circuit begins with the AC input (usually 230V or 110V)
Converts the incoming AC into a pulsing DC signal before PFC processing. DC-DC Conversion and Isolation a20112 power supply schematic
Controlled by the A20112 to regulate the energy flow.