ISL6744
Intermediate Bus Double-Ended PWM Controller with Precision Dead-Time Adjustment
Not Recommended for New Designs.
Recommended Replacement Part ISL6744A.
Typical Diagram
Key Features
- Precision Duty Cycle and Deadtime Control
- 100µA Start-up Current
- Adjustable Delayed Overcurrent Shutdown and Re-Start
- 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)
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.
Applications
- Telecom and Datacom Isolated Power
- DC Transformers
- Bus Converters
