TOP245PN is an offline switch-mode power supply controller IC from Power Integrations.
It belongs to the TOPSwitch-GX family, which integrates a PWM controller and a high-voltage MOSFET inside one chip for building compact AC-DC power supplies.

📌 Main Specifications

• Type: Integrated SMPS controller + MOSFET

• Package: DIP-8 (TOP245PN)

• Input Voltage: 85 V – 265 V AC (after rectifier)

• Output Power: about 70 W – 100 W depending on circuit design

• Switching Frequency: ~132 kHz

• Built-in Protections: