STMicroelectronics | L6599ATD

The L6599ATD is a temperature-extended version of the L6599A. It is a double-ended controller specifically designed for 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 at 180° out-of-phase for exactly the same time interval.

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 guarantees soft-switching and enables high-frequency operation.

Features:

• 50% duty cycle, variable frequency control of resonant half-bridge
• High-accuracy oscillator
• Up to 500 kHz 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
• 600 V-rail compatible high-side gate driver with integrated bootstrap diode and high dv/dt immunity
• -300/700 mA high-side and low-side gate drivers with UVLO pull-down
• DIP16, SO16N package
• Guaranteed for extreme temperature ranges

Applications:

• Street lighting
• LCD and PDP TVs
• Desktop PCs, entry-level servers
• Telecom SMPS
• High efficiency industrial SMPS
• AC-DC adapters, open frame SMPS

View the Complete family of L6599 PWM Controllers