The L6565 is a current-mode primary controller IC, specifically designed to build offline Quasi-resonant ZVS (Zero Voltage Switching at switch turn-on) flyback converters. Quasi-resonant operation is achieved by means of a transformer demagnetization sensing input that triggers MOSFET's turn-on. Converter's power capability variations with the mains voltage are compensated by line voltage feedforward. At light load the device features a special function that automatically lowers the operating frequency still maintaining the operation as close to ZVS as possible. In addition to very low start-up and quiescent currents, this feature helps keep low the consumption from the mains at light load and be Blue Angel and Energy Star compliant. The IC includes also a disable function, an on-chip filter on current sense, an error amplifier with a precise reference voltage for primary regulation and an effective two-level overcurrent protection. https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2020-06-12 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2021-04-03 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2021-04-15 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2021-07-17 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2021-12-04 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2022-04-07 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2022-06-13 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2022-06-25 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2023-03-23 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2023-12-13 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2023-12-30 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2024-01-16 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2024-11-20 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2025-07-04 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2025-10-21 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2026-01-12 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2026-02-18 https://elecena.pl/product/16964401/l6565dtr-quasi-resonant-controller 2026-03-19