L6599D

The L6599D is a Double-ended Controller for the resonant half-bridge topology. It provides 50% complementary duty cycle, 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. A fixed dead-time inserted between the turn-OFF of one switch and the turn-ON of the other one guarantees soft-switching and enables high-frequency operation. To drive the high-side switch with the bootstrap approach, the IC incorporates a high-voltage floating structure able to withstand more than 600V with a synchronous-driven high-voltage DMOS that replaces the external fast-recovery bootstrap diode. The IC enables the designer to set the operating frequency range of the converter by means of an externally programmable oscillator.

• High-accuracy oscillator
• Up to 500kHz operating frequency
• Frequency-shift and latched shutdown 2-level OCP
• Interface with PFC controller
• Latched disable input
• Burst-mode operation at light load
• Non-linear soft-start for monotonic output voltage rise