TNY280PN
Overview
The TNY280PN is an offline flyback switcher IC from the TinySwitch-4 family, integrating a 700V power MOSFET and a controller into a single 7-lead PDIP package. It utilizes a simple ON/OFF control scheme to maintain high efficiency even at very light loads, making it ideal for standby power supplies. This device is self-biased, which eliminates the need for a bias winding on the transformer in many designs.
Why Choose This Part
The TNY280PN features frequency jittering to significantly reduce EMI filter costs and a selectable current limit to optimize transformer design. It provides comprehensive protection including accurate hysteretic thermal shutdown and output overvoltage protection. The 700V breakdown voltage allows for robust operation in areas with unstable line voltages.
Applications
Key Specifications
Getting Started
Designers should use Power Integrations PI Expert software to calculate transformer parameters and optimize the feedback circuit. Ensure the SOURCE pins are soldered to a large copper area to provide effective heatsinking for the internal MOSFET. Follow the recommended PCB layout to maintain isolation creepage between the high-voltage DRAIN pin and adjacent low-voltage pins.
