L6565DTR

AC DC Converters, Offline Switchers Overview

The L6565DTR is a current-mode primary controller IC designed for offline Quasi-resonant Zero Voltage Switching (ZVS) flyback converters. It operates within a supply voltage range of 10.3V to 18V and supports a maximum output current of 400mA. The device features ultra-low start-up current under 70µA and quiescent current under 3.5mA. It includes a ±400mA totem pole gate driver with UVLO pull-down, an error amplifier with a precise reference voltage, and two-level overcurrent protection. The component is housed in an 8-SOIC package.

AC DC Converters, Offline Switchers Feature Summary

• Quasi-resonant operation achieved via transformer demagnetization sensing input to trigger MOSFET turn-on.
• Line voltage feedforward compensates for power capability variations against mains changes.
• Frequency foldback function lowers operating frequency at light load to maintain ZVS and standby efficiency.
• Integrated disable function and on-chip filter on current sense for enhanced control.

AC DC Converters, Offline Switchers Applications

• TV/Monitor SMPS
• AC-DC Adapters/Chargers
• Printers, Fax Machines, Photocopiers, and Scanners

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'DTR' corresponds to the tape-and-reel packaging format required for automated assembly processes. Confirm that the 8-SOIC package dimensions align with the target PCB footprint. Ensure compliance with RoHS3 specifications if environmental regulations apply to the final product deployment.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring high efficiency in offline flyback topologies. The integrated line feedforward and frequency foldback capabilities are critical for meeting energy standards like Energy Star and Blue Angel. Consider the thermal performance within the 8-SOIC package when designing for higher power densities.

AC DC Converters, Offline Switchers Part Context

The L6565DTR belongs to the L6565 series from STMicroelectronics, which focuses on efficient AC-DC conversion. This series is engineered to support constant power delivery across varying mains voltages while minimizing standby consumption. The DTR variant specifically denotes the reel-packaged version of the standard L6565 controller.

AC DC Converters, Offline Switchers Replacement Considerations

Direct substitutes include the L6565D (SOIC-8 tube) and L6565N (PDIP-8). Verify pinout compatibility and thermal characteristics before substitution.