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.
■ 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
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