LNK3209P

AC DC Converters, Offline Switchers Overview

The LNK3209P is a LinkSwitch-XT2 family AC/DC converter IC designed for high-performance offline power supplies. It integrates a 750 V Power MOSFET with a current-mode controller, high-voltage startup circuit, and thermal shutdown. The device supports Buck, Buck-Boost, and Flyback topologies with a fixed switching frequency of 66 kHz. It operates from an input voltage range of 85 VAC to 265 VAC. The output current capability is specified as 600 mA in MDCM and 1000 mA in CCM. It features a maximum duty cycle of 73% and a quiescent supply current of 300 uA. The component is rated for operation between -40°C and +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 750 V Power MOSFET with advanced current-mode control and thermal protection.
• Supports multiple topologies including Buck, Buck-Boost, and Flyback configurations.
• Features high-voltage startup and low quiescent current for efficient standby performance.

AC DC Converters, Offline Switchers Applications

• Universal input AC/DC converters
• Offline flyback power supplies
• Buck and Buck-Boost converter designs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific package variant (e.g., DIP-8, SO-8C) against the datasheet before ordering, as suffixes may indicate different pinouts or insulation ratings. Confirm RoHS compliance status directly with the manufacturer or authorized distributors. Ensure the selected version matches the required isolation and thermal specifications for the target application environment.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring integrated high-voltage MOSFETs and flexible topology support. Consider the 66 kHz switching frequency for EMI management and transformer design. Evaluate the 750 V breakdown voltage suitability for universal line inputs. Verify that the 300 uA quiescent current meets standby power requirements.

AC DC Converters, Offline Switchers Part Context

The LNK3209P belongs to the LinkSwitch-XT2 series from Power Integrations, which focuses on compact, high-efficiency AC/DC conversion solutions. This series is designed to minimize external component count by integrating control logic, protection circuits, and power switches into a single package, suitable for cost-sensitive and space-constrained power adapter designs.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for compatible LinkSwitch-XT2 variants. Verify electrical parameters such as breakdown voltage and switching frequency when considering alternatives within the same family.