L6599AT is a high-voltage resonant controller manufactured by ST. It features 50% duty cycle, variable frequency control of resonant half-bridge, high-accuracy oscillator, up to 500 kHz operating frequency, two-level OCP: frequency shift and latched shutdown, interface with PFC controller, latched disable input, burst-mode operation at light load, input for power-ON/OFF sequencing or brownout protection, non-linear soft-start for monotonic output voltage rise, 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity, -300/700 mA high-side and low-side gate drivers with UVLO pull-down, DIP16, SO16N package, guaranteed for extreme temperature ranges.
The L6599AT is a temperature-extended version of the L6599A, designed specifically for series-resonant half-bridge topologies. It provides a 50% complementary duty cycle with a fixed dead-time to ensure soft-switching and enable high-frequency operation up to 500 kHz.
The device includes a high-voltage floating structure capable of withstanding more than 600 V, utilizing a synchronous-driven high-voltage DMOS to replace the external bootstrap diode. Key features include a high-accuracy oscillator, two-level overcurrent protection (frequency-shift and latched shutdown), and an interface for PFC controllers.
| Operating frequency | Up to 500 kHz |
|---|---|
| Package types | DIP16, SO16N |
| High-side gate driver voltage | 600 V-rail compatible |
| High-side gate driver current | 300/700 mA |
| Duty cycle | 50% |
| Dead-time | Fixed |
It is a double-ended controller specifically designed for the series-resonant half-bridge topology.
Yes, it incorporates a synchronous-driven high-voltage DMOS that replaces the external fast-recovery bootstrap diode.
The available order codes are L6599ATD (SO16N), L6599ATDTR (SO16N Tape and reel), and L6599ATN (DIP16).