ISL6744AAUZ-T Renesas

DATASHEET ISL6744A FN6554 Rev.1.00 Intermediate Bus PWM Controller Aug 25, 2017 The ISL6744A is a low cost, primary side, double-ended Features controller intended for applications using full and Precision duty cycle and dead time control half-bridge topologies for unregulated DC/DC converters. It 100A start-up current is a voltage-mode PWM controller designed for half-bridge and full-bridge power supplies. It provides precise Adjustable delayed overcurrent shutdown and restart switching frequency control, adjustable soft-start, precise Adjustable oscillator frequency up to 2MHz dead time control with dead times as low as 35ns, and overcurrent shutdown. The ISL6744A is identical to the 1A MOSFET gate drivers ISL6744, but is optimized for higher noise environments. Adjustable soft-start Low start-up and operating currents allow for easy biasing Internal over-temperature protection in both AC/DC and DC/DC applications. This advanced 35ns control to output propagation delay BiCMOS design features low start-up and operating currents, adjustable switching frequency up to 1MHz, 1A Small size and minimal external component count FET drivers, and very low propagation delays for a fast Input undervoltage protection response to overcurrent faults. Pb-free (RoHS compliant) Related Literature Applications For a full list of related documents, visit our website Telecom and datacom isolated power ISL6744A product page DC transformers Bus converters FN6554 Rev.1.00 Page 1 of 27 Aug 25, 2017ISL6744A Contents 1. Overview . 3 1.1 Internal Architecture 3 1.2 Typical Application . 4 1.3 Ordering Information . 5 1.4 Pin Configuration 5 1.5 Pin Descriptions . 6 2. Specifications . 7 2.1 Absolute Maximum Ratings 7 2.2 Thermal Information 7 2.3 Recommended Operating Conditions 7 2.4 Electrical Specifications . 7 3. Typical Performance Curves . 9 4. Functional Description 10 4.1 Features 10 4.2 Oscillator . 10 4.3 Soft-Start Operation . 11 4.4 Gate Drive 11 4.5 Overcurrent Operation . 11 4.6 Thermal Protection 11 4.7 Ground Plane Requirements 11 5. Typical Application 12 5.1 Circuit Elements 12 5.2 Design Specifications 12 5.3 Transformer Design . 13 5.4 MOSFET Selection . 16 5.5 Oscillator Component Selection 17 5.6 Output Filter Design . 18 5.7 Current Limit Threshold 19 5.8 Performance 20 5.9 Waveforms 21 6. Component List 23 7. Revision History 24 8. Package Outline Drawing 25 9. About Intersil 27 FN6554 Rev.1.00 Page 2 of 27 Aug 25, 2017