L6599N Datasheet PDF - ST Microelectronics

The L6599N is a high-voltage Resonant Controller for the resonant half-bridge topology. It provides 50% 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. 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. 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.

● 50% Duty cycle, variable frequency control of resonant half-bridge

● High-accuracy oscillator

● 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