TOP223YN Three-Terminal Off-Line PWM Switch 5.7V 1.2mA TO-220/3

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TOP223YN Three-Terminal Off-Line PWM Switch 5.7V 1.2mA TO-220/3 The TOP223YN is a three-terminal offline PWM switch from the TOPSwitch family, designed to simplify switch-mode power supply (SMPS) designs. It integrates a high-voltage power MOSFET, PWM controller, oscillator, and essential protection circuits into a single device. This high level of integration reduces the number of external components, making it ideal for compact, cost-effective, and reliable power supply designs. This IC operates directly from rectified AC mains and supports multiple power supply topologies such as flyback, buck, and forward converters. It includes advanced protection features like thermal shutdown, auto-restart, and current limiting, ensuring safe and stable operation under fault conditions. The TO-220-3 package provides good thermal performance, making it suitable for medium power applications such as adapters, chargers, and consumer electronics. Features: Integrated high-voltage power MOSFET. Built-in PWM controller and oscillator. Three-terminal design for simplified implementation. Supports multiple SMPS topologies. Auto-restart protection during faults. Thermal shutdown protection. Internal current limiting. High efficiency operation. Low external component count. Direct operation from AC mains. Specifications: Parameter Value Supply Voltage 5.7V Control Current 1.2 mA Input Type Offline (AC-DC) Package Type TO-220-3 Topology Support Flyback, Buck, Forward Switching Frequency ~100 kHz Output Power Up to ~30W Pinout: Pin No. Pin Name Description 1 Control (C) Feedback and control input 2 Source (S) Ground reference 3 Drain (D) High-voltage input Applications: AC-DC power supplies. Battery chargers. Power adapters. Standby power supplies. Consumer electronics. Industrial SMPS. LED drivers. Package Included: 1x TOP223YN Three-Terminal Off-Line PWM Switch 5.7V 1.2mA TO-220/3. Documents: TOP223YN Datasheet.