The STMicroelectronics high-voltage resonant controller, it is a is a double-ended controller specific to series-resonant half bridge topology. Both LLC and LCC configurations are supported. It provides symmetrical complementary duty cycle, the high-side switch and the low-side switch are driven ON/OFF 180° out-of phase for exactly the same time. Output voltage regulation is obtained by modulating the operating frequency. The dead time inserted between the turn-off of one switch and the turnon of the other one is automatically adjusted to best fit the transition times of the half bridge midpoint.

Anti capacitive mode protection
Burst-mode operation at light load
Self-adjusting adaptive dead time
High-accuracy oscillator