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ISL6752

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

TheISL6752isahigh-performance,low-pin-countalternative zero-voltageswitching(ZVS)full-bridgePWMcontroller.Like Intersil’sISL6551,itachievesZVSoperationbydrivingthe upperbridgeFETsatafixed50dutycyclewhilethelower bridgeFETsaretrailing-edgemodulatedwithadjust

ISL6752

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control; ? Adjustable resonant delay for ZVS operation\n? Synchronous rectifier control outputs with adjustable delay/advance\n? Current-mode control\n? 3% current limit threshold\n? Adjustable dead time control\n? 175μA start-up current\n? Supply UVLO\n? Adjustable oscillator frequency up to 2MHz\n? Internal over-temperature protection\n? Buffered oscillator sawtooth output\n? Fast current sense to output delay\n? Adjustable cycle-by-cycle peak current limit\n? 70ns leading edge blanking\n? Multi-pulse suppression\n? Pb-free (RoHS compliant)\n;

The ISL6752 is a high-performance, low-pin count alternative Zero-Voltage Switching (ZVS) full-bridge PWM controller. Like Renesas' 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. The complemented outputs may be dynamically advanced or delayed relative to the PWM outputs using an external control voltage. This advanced BiCMOS design features precision dead time and resonant delay control and an oscillator adjustable to 2MHz operating frequency. Additionally, multi-pulse suppression ensures alternating output pulses at low duty cycles where pulse skipping may occur.

ISL6752

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

ISL6752

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

ISL6752

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

ISL6752

ZVS Full-Bridge PWM Controller with Adjustable Synchronous Rectifier Control

ISL6752

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

ISL6752AAZA

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

TheISL6752isahigh-performance,low-pin-countalternative zero-voltageswitching(ZVS)full-bridgePWMcontroller.Like Intersil’sISL6551,itachievesZVSoperationbydrivingthe upperbridgeFETsatafixed50dutycyclewhilethelower bridgeFETsaretrailing-edgemodulatedwithadjust

ISL6752/54EVAL1Z

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control

ISL6752_06

ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control