L6668 is a current-mode primary controller IC, designed to build single-ended converters. The IC drives the system at fixed frequency at heavy load and an improved Standby function causes a smooth frequency reduction as the load is progressively reduced. At very light load the device enters a special operating mode (burst-mode with fixed, externally programmed peak current) that, in addition to the on-board high-voltage start-up and the very low quiescent current, helps keep low the consumption from the mains and be compliant with energy saving regulations. To allow meeting compliance with these standards in power-factor-corrected systems too, an interface with the PFC controller is provided that enables to turn off the pre-regulator when the load level falls below a threshold. The IC includes also a programmable soft-start, slope compensation for stable operation at duty cycles greater then 50%, a disable function, a leading edge blanking on current sense to improve noise immunity, latched disable for OVP or OTP shutdown and an effective two-level OCP able to protect the system even in case the secondary diode fails short. https://elecena.pl/product/17494210/l6668 2021-04-03 https://elecena.pl/product/17494210/l6668 2021-04-15 https://elecena.pl/product/17494210/l6668 2021-07-17 https://elecena.pl/product/17494210/l6668 2021-12-04 https://elecena.pl/product/17494210/l6668 2022-04-07 https://elecena.pl/product/17494210/l6668 2022-06-13 https://elecena.pl/product/17494210/l6668 2022-06-25 https://elecena.pl/product/17494210/l6668 2023-03-23 https://elecena.pl/product/17494210/l6668 2024-01-08 https://elecena.pl/product/17494210/l6668 2024-02-02 https://elecena.pl/product/17494210/l6668 2024-07-03 https://elecena.pl/product/17494210/l6668 2024-09-28 https://elecena.pl/product/17494210/l6668 2024-11-20 https://elecena.pl/product/17494210/l6668 2025-07-04 https://elecena.pl/product/17494210/l6668 2026-01-03