TOP223P

TOP223P is an offline PWM switch IC from Power Integrations, part of the TOPSwitch-II family. It’s designed for low to medium power AC‑DC switched-mode power supplies (SMPS).

This IC integrates:

• High-voltage MOSFET

• PWM controller

• Startup circuitry

• Protection circuits (over-current, over-temperature)

It allows designers to build efficient power supplies with fewer external components.

Main Specifications

• Type: Offline PWM switch (SMPS controller)

• Series: TOPSwitch-II

• Package: TO‑220‑3 (3 pins)

• Input voltage: 85–265 V AC

• Maximum output power: ~45 W (single voltage input), ~30 W (universal input)

• Breakdown voltage: 700 V

• Switching frequency: ~100 kHz

• Operating temperature: −40 °C to +150 °C

Key Features

• Integrated 700 V power MOSFET

• Auto-restart protection

• Current limit

• Thermal shutdown

• High efficiency

• Suitable for flyback, forward, buck, or boost converters

Typical Applications

• AC-DC adapters

• TV / monitor power supply boards

• DVD / satellite receiver power supplies

• Battery chargers

• Audio equipment power supplies

✅ Simple explanation:
TOP223P is a small switching IC that converts mains AC into regulated DC for low to medium-power devices.

If you want, I can make a comparison chart of TOP223P, TOP224YN, TOP225YN, TOP227YN, TOP243YN, TOP247YN, and TOP248YN, showing power range, package, and features. This is extremely helpful for repairs and replacements.

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