TOP227YN Power Integrations Offline Switcher IC 5.7V 1.4mA TO-220

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TOP227YN Power Integrations Offline Switcher IC 5.7V 1.4mA TO-220 The TOP227YN is a high-performance offline switcher IC from Power Integrations, belonging to the TOPSwitch-II family. It integrates a high-voltage power MOSFET, PWM controller, startup circuit, error amplifier, and full protection system into a single TO-220 package, allowing designers to create reliable and compact AC-DC switch-mode power supplies with minimal external components. Designed for operation directly from rectified AC mains, TOP227YN simplifies SMPS designs by eliminating the need for external bias supplies and control circuits. It supports multiple power supply topologies including flyback, buck, and forward converters, making it suitable for consumer electronics, industrial control, battery chargers, and standby power applications. Built-in protection functions such as automatic restart, thermal shutdown, and current limiting ensure stable and safe operation even under fault or overload conditions. Features: Integrated high-voltage MOSFET and PWM controller. Internal startup and bias circuitry. Automatic restart on fault. Thermal shutdown protection. Built-in current limiting. Reduced external component count. Supports isolated and non-isolated SMPS designs. Low EMI operation. Compact power supply solution. Specifications: Product Attribute Attribute Value Product Category: AC/DC Converters Mounting Style: Through Hole Package/Case: TO-220 Output Voltage: 5.7V Switching Frequency: 100kHz Duty Cycle – Max: 70% Operating Supply Current: 1.4mA Minimum Operating Temperature: – 40C Maximum Operating Temperature: + 150C Series: TOP227 Subcategory: PMIC – Power Management ICs Type: Off Line Switcher Pinout: Pin No Pin Name Description 1 Control Feedback and bias input 2 Drain High-voltage MOSFET drain 3 Source Power ground return Footprint: Applications: AC-DC power adapters. Battery chargers. Standby power supplies. TV and monitor SMPS. Audio and video equipment. Industrial power modules. Embedded electronics power units. Packages: 1x TOP227YN Power Integrations Offline Switcher IC 5.7V 1.4mA TO-220. Documents: TOP227YN Datasheet