ISL6744

Features:

• Precision Duty Cycle and Deadtime Control
• 100A Start-up Current
• Adjustable Delayed Overcurrent Shutdown and Restart
• Adjustable Oscillator Frequency Up to 2MHz
• 1A MOSFET Gate Drivers
• Adjustable Soft-Start
• Internal Over Temperature Protection
• 35ns Control to Output Propagation Delay
• Small Size and Minimal External Component Count
• Input Undervoltage Protection
• Pb-Free Plus Anneal Available (RoHS Compliant)




Application

• Telecom and Datacom Isolated Power
• DC Transformers
• Bus Converters




Pinout






Specifications

Supply Voltage, VDD . . . . . . . . . . . . . . . . .GND - 0.3V to +20.0V
OUTA, OUTB . . . . . . . . . . . . . . . . . . . . . . . . . GND - 0.3V to VDD
Signal Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . .GND - 0.3V to 5V
Peak GATE Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1A
ESD Classification
Human Body Model (Per MIL-STD-883 Method 3015.7) . . 2000V
Machine Model (Per EIAJ ED-4701 Method C-111). . . . . . . 100V
Charged Device Model (Per EOS/ESD DS5.3, 4/14/93) . . .1000V




Description

The ISL6744 is a low cost, primary side, double-ended controller intended for applications using full and half-bridge topologies for unregulated DC/DC converters. It is a voltagemode PWM controller designed for half-bridge and fullbridge power supplies. It provides precise control of switching frequency, adjustable soft-start, precise deadtime control with deadtimes as low as 35ns, and overcurrent shutdown. Low start-up and operating currents allow for easy biasing in both AC/DC and DC/DC applications. This advanced BiCMOS design features low start-up and operating currents, adjustable switching frequency up to 1MHz, 1A FET drivers, and very low propagation delays for a fast response to overcurrent faults.