🔌 What It Is

TOP266VG is an integrated offline AC‑to‑DC flyback switcher IC in the TOPSwitch‑JX family. It combines an internal high‑voltage MOSFET with PWM control, protection circuits, and support for different power levels — letting you build efficient mains power supplies with low external part count. 

⚙️ Key Technical Specs

• Topology: Flyback offline AC‑DC converter controller. 

• Series: TOPSwitch‑JX. 

• Package: eDIP‑12 through‑hole. 

• Input Voltage Range: 85 VAC to 265 VAC universal mains. 

• Internal Switch: Integrated high‑voltage MOSFET with ~725 V rating. 

• Switching Frequency: Typical PWM around 132 kHz, with options for ~66 kHz for efficiency. 

• Output Power: Suitable for SMPS designs up to ~39 W (tube/enclosed design). 

• Operating Temp: −40 °C to +150 °C (junction).