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ISL6752 Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL6752 Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 16 page 1 ® FN9181.2 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2005, 2006. All Rights Reserved All other trademarks mentioned are the property of their respective owners. ISL6752 ZVS Full-Bridge Current-Mode PWM with Adjustable Synchronous Rectifier Control 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. 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 deadtime 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. Features • Adjustable Resonant Delay for ZVS Operation • Synchronous Rectifier Control Outputs with Adjustable Delay/Advance • Current-Mode Control • 3% Current Limit Threshold • Adjustable Deadtime Control • 175µA Startup Current • Supply UVLO • Adjustable Oscillator Frequency Up to 2MHz • Internal Over Temperature Protection • Buffered Oscillator Sawtooth Output • Fast Current Sense to Output Delay • Adjustable Cycle-by-Cycle Peak Current Limit • 70ns Leading Edge Blanking • Multi-Pulse Suppression • Pb-Free Plus Anneal Available (RoHS Compliant) • ELV, WEEE, and RoHS Compliant Applications • ZVS Full-Bridge Converters • Telecom and Datacom Power • Wireless Base Station Power • File Server Power • Industrial Power Systems Pinout ISL6752 (QSOP) TOP VIEW Ordering Information PART NUMBER PART MARKING TEMP. RANGE (°C) PACKAGE PKG. DWG. # ISL6752AAZA (Note) ISL6752AAZ -40 to 105 16 Ld QSOP (Pb-free) M16.15A Add -T suffix to part number for tape and reel packaging. NOTE: Intersil Pb-free plus anneal products employ special Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 14 15 16 9 13 12 11 10 1 2 3 4 5 7 6 8 VADJ VREF VERR CTBUF RTD RESDEL CS CT VDD OUTLR OUTUL OUTUR OUTLLN OUTLRN GND OUTLL Data Sheet April 4, 2006 |
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