The L6599 is a half-bridge resonant converter controller with a built-in high voltage driver, programmable generator, and fixed dead time. Has built-in circuitry to replace high voltage boost diodes. Judging from the 2009 datasheet, the microcircuits are relatively new. Its latest version— the L6599AT, used for the author's version of the power supply described in this article — dates back to 2017. The L6599 microcircuit has several modifications: L6599 - the first version of the microcircuit, which is currently discontinued; L6599A - the first modified modification to replace the L6599; L6599AF - modification of the microcircuit designed for extreme temperatures; and the L6599AT is the most modern modification to the microcircuit. All listed microcircuit modifications are compatible. In the circuits described below, modifications to any of the listed microcircuits are allowed, but it is recommended to use the last, most modern - the L6599AT. The microcircuit's rich feature set provides developers with ample opportunity to build high-quality, modern switching power supplies on top of it.
Feature list of the L6599 chip:
- Microcurrent start-up;
- Powerful built-in low-level and high-level drivers;
- Built-in boost diode for organizing the floating power supply of high voltage drives;
- Programmable generators;
- Fixed dead time;
- Slow start;
- Batch operation mode;
- Interface to power factor corrector (PFC) controller communication;
- Two-stage overload and short-circuit protection: frequency shifting and forced shutdown;
- Stop the additional output of the microcircuit under the given external conditions;
- Low input supply voltage protection;
More details can be found at L6599-based LLC Resonant SMPS - Circuit City
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