Power Integrations

TNY254PN  

AC DC Converters, Offline Switches

TNY254PN Description

The TNY254PN from Power Integrations is a highly integrated offline switcher IC designed for flyback topology applications, offering a compact and efficient solution for low-power AC/DC conversion. Housed in an 8-pin DIP package, it combines a 700V breakdown voltage MOSFET, oscillator, high-voltage switched current source, and thermal shutdown circuitry into a single device. With a switching frequency of 44kHz and a duty cycle of 68%, it delivers up to 4W of power, making it ideal for space-constrained designs. The IC is RoHS compliant and adheres to REACH unaffected standards, ensuring environmental and regulatory compliance.

TNY254PN Features

• Integrated 700V MOSFET: Eliminates the need for an external switch, reducing BOM cost and PCB footprint.
• Current Limiting & Over-Temperature Protection: Enhances reliability by safeguarding against fault conditions.
• EN (Enable) Control: Allows precise power management and standby mode operation.
• 44kHz Switching Frequency: Optimized for low EMI and high efficiency in offline power supplies.
• Isolated Output: Ensures safety in applications requiring galvanic isolation.
• Through-Hole Mounting (DIP-8): Simplifies prototyping and manufacturing.

TNY254PN Applications

The TNY254PN excels in low-power offline power supplies, including:

• Auxiliary Power Supplies: For industrial controls, appliances, and consumer electronics.
• LED Drivers: Non-dimmable LED lighting systems requiring compact, efficient power conversion.
• AC/DC Adapters: Chargers and adapters for small devices (e.g., routers, IoT modules).
• Household Appliances: Power management in devices like smart thermostats or smoke detectors.

Conclusion of TNY254PN

The TNY254PN stands out for its high integration, robust protection features, and cost-effectiveness, making it a preferred choice for 4W offline flyback converters. While marked as "Not For New Designs", it remains a reliable option for legacy or cost-sensitive applications. Its isolated output, EN control, and thermal protection make it particularly suited for safety-critical and space-constrained designs. Engineers seeking a proven, no-frills offline switcher will find the TNY254PN a compelling solution.

TNY254PN Documents

Download datasheets and manufacturer documentation for TNY254PN

PCN Assembly/Origin :

Mult Devices 21/Mar/2017       Wire Bonding Chg 21/Mar/2016      

Datasheets :

TNY253, 254, 255      

PCN Design/Specification :

Leadframe Design 20/Jan/2023