L6599ADTR

L6599ADTR is an improved high-voltage resonant controller. It is a double-ended controller specific to the series-resonant half-bridge topology. It provides a 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. A fixed dead time inserted between the turn-off of one switch and the turn-on of the other guarantees soft-switching and enables high-frequency operation. The IC enables the designer to set the operating frequency range of the converter by means of an externally programmable oscillator. An interface with the PFC controller is provided that enables the pre-regulator to be switched off during fault conditions, such as OCP shutdown and DIS high, or during burst mode operation. Typical applications are LCD and PDP TV, desktop PC, entry-level server, telecom SMPS, high efficiency industrial SMPS, AC-DC adapter, open frame SMPS.

• 50% duty cycle, variable frequency control of resonant half bridge
• High accuracy oscillator, 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
• SO16N package
• Junction temperature operating range from -40 to 150°C
• Quiescent current is 1.5mA typical (device on, VSTBY = 1V)
• Operating current is 3.5mA typ (device on, VSTBY = VRFmin)