L6599AD

Product Summary

The L6599AD is an Improved high-voltage resonant controller. It is a double-ended controller specific for the series-resonant half-bridge topology. The L6599AD 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 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. The applications of the L6599AD include LCD and PDP TV, Desktop PC, entry-level server, Telecom SMPS, High efficiency industrial SMPS, AC-DC adapter, open frame SMPS.

Parametrics

L6599AD absolute maximum ratings: (1)VBOOT, Floating supply voltage: -1 to 618 V; (2)VOUT, Floating ground voltage: -3 to VBOOT -18 V; (3)dVOUT/dt, Floating ground max. slew rate: 50 V/ns; (4)Vcc, IC supply voltage (Icc = 25 mA): Self-limited; (5)VPFC_STOP, Maximum voltage (pin open): -0.3 to Vcc; (6)IPFC_STOP, Maximum sink current (pin low): Self-limited; (7)VLINEmax, Maximum pin voltage (Ipin ≤ 1 mA): Self-limited; (8)IRFmin, Maximum source current: 2 mA; (9)Analog inputs and Outputs: -0.3 to 5 V; (10)Ptot Power dissipation @TA = 70℃ (DIP16): 1 W; (11)Power dissipation @TA = 50℃ (SO16): 0.83W; (12)Tj, Junction temperature operating range: -40 to 150℃; (13)Tstg, Storage temperature: -55 to 150℃.

Features

L6599AD features: (1)50% duty cycle, variable frequency control of resonant half-bridge; (2)High-accuracy oscillator; (3)Up to 500 kHz operating frequency; (4)Two-level OCP: frequency-shift and latched shutdown ; (5)Interface with PFC controller; (6)Latched disable input ; (7)Burst-mode operation at light load; (8)Input for power-ON/OFF sequencing or brownout protection; (9)Non-linear soft-start for monotonic output voltage rise; (10)600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity; (11)-300/800 mA high-side and low-side gate drivers with UVLO pull-down; (12)DIP16, SO16N package.

Diagrams