Click to expand full text
DATASHEET
ISL6752
ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control
FN9181 Rev 4.00 August 1, 2016
The ISL6752 is a high-performance, low-pin count alternative Zero-Voltage Switching (ZVS) full-bridge PWM controller. Like Intersil’s ISL6551, it achieves ZVS operation by driving the upper bridge FETs at a fixed 50% duty cycle while the lower bridge FETs are trailing-edge modulated with adjustable resonant switching delays. Compared to the more familiar phase-shifted control method, this algorithm offers equivalent efficiency and improved overcurrent and light load performance with less complexity in a lower pin count package.
The ISL6752 features complemented PWM outputs for Synchronous Rectifier (SR) control.