TOP246YN is an offline switcher IC made by Power Integrations.
It is used in switch-mode power supplies (SMPS) to convert high-voltage AC (110–240 V) into stable DC voltages.

It belongs to the TOPSwitch-GX family, which integrates a PWM controller + high-voltage MOSFET in one chip.

📌 Main Features

• Type: Offline switch-mode power supply controller

• Built-in MOSFET: Yes (high-voltage power switch inside)

• Input voltage: Works directly from AC mains (85–265 VAC) after rectification

• Output power: Up to about 100 W depending on design

• Package: DIP-7 (TOP246YN)

• Protections: