LNK306DG

AC DC Converters, Offline Switchers Overview

The LNK306DG is an AC/DC converter from the LinkSwitch-TN family, designed as a low-component-count replacement for linear and capacitor-fed supplies. It integrates a 700 V power MOSFET, oscillator, On/Off control, high voltage switched current source, frequency jittering, cycle-by-cycle current limit, and thermal shutdown. Operating with an input voltage range of 85 VAC to 265 VAC, it delivers a maximum output current of 225 mA in MDCM and 360 mA in CCM at 12 V. The device features a maximum duty cycle of 72%, operates at 66 kHz, and has a quiescent supply current of 68 uA. It functions within a temperature range of -40°C to +150°C and is housed in an SO-8C package.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET and complete control circuitry on a monolithic IC
• Features fully integrated auto-restart for safe fault protection during short-circuit or open loop conditions
• Derives startup and operating power directly from the DRAIN pin, eliminating bias supply requirements
• Includes frequency jittering and cycle-by-cycle current limit for enhanced performance

AC DC Converters, Offline Switchers Applications

• Non-isolated buck converters
• Non-isolated buck-boost converters
• Flyback power supplies
• LED drivers using boost topology

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'DG' against official Power Integrations documentation to confirm package type and tape/reel specifications. Ensure compatibility with the required SO-8C footprint and check RoHS compliance status via the manufacturer's datasheet before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring minimal external parts count and cost-effective replacement of legacy linear or cap-dropper designs. It is suitable for systems needing up to 360 mA output current without safety isolation between input and output. Consider the non-isolated nature when designing enclosures to ensure adequate physical separation.

AC DC Converters, Offline Switchers Part Context

The LNK306DG belongs to the LinkSwitch-TN series, which targets the under 360 mA output current segment. This family aims to provide higher efficiency and performance compared to traditional non-isolated solutions while maintaining equal system costs. It is part of Power Integrations' portfolio for simplified offline converter designs.

AC DC Converters, Offline Switchers Replacement Considerations

Official substitutes include other variants within the LinkSwitch-TN family such as LNK306DN or LNK306GN, depending on packaging preferences. Verify electrical parameters and pinout compatibility before substitution.