Device description
The L6599 is a double-ended controller specific for the resonant half-bridge topology. It provides 50% complementary duty cycle: the high-side switch and the low-side switch are driven ON 180° out-of-phase for exactly the same time.
Output voltage regulation is obtained by modulating the operating frequency. A fixed deadtime inserted between the turn-OFF of one switch and the turn-ON of the other one guarantees soft-switching and enables high-frequency operation.

Features
■ 50% duty cycle, variable frequency control of
   resonant half-bridge
■ High-accuracy oscillator
■ Up to 500kHz 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
■ 600V-rail compatible high-side gate driver with
   integrated bootstrap diode and high dV/dt
   immunity
■ -300/800mA high-side and low-side gate
   drivers with UVLO pull-down
■ DIP-16, SO-16N packages

Applications
■ LCD & PDP TV
■ Desktop PC, entry-level server
■ Telecom SMPS
■ AC-DC adapter, open frame SMPS