ISL6744AAUZ

DC DC Switching Controllers Overview

The ISL6744AAUZ is an obsolete primary-side, double-ended PWM controller designed for half-bridge and full-bridge topologies in unregulated DC/DC converters. It features a low-cost BiCMOS design with adjustable oscillator frequency up to 1MHz, 1A MOSFET gate drivers, and precise dead time control as low as 35ns. The device includes adjustable delayed overcurrent shutdown, internal over-temperature protection, input undervoltage protection, and soft-start functionality. Operating within a temperature range of -40°C to +105°C, it utilizes an MSOP-8 package.

DC DC Switching Controllers Feature Summary

• Optimized for high noise environments with precision duty cycle and dead time control
• Features 1A FET drivers and very low propagation delays for fast overcurrent fault response
• Includes adjustable delayed overcurrent shutdown and restart capabilities
• Provides internal over-temperature protection and input undervoltage protection

DC DC Switching Controllers Applications

• Telecom power supplies
• Datacom isolated power systems
• DC transformers
• Bus converters

DC DC Switching Controllers Procurement Notes

Verify component status carefully as the ISL6744AAUZ is officially listed as obsolete. Confirm availability through authorized distributors or secondary market sources, noting that stock levels may be limited. Ensure compatibility with existing designs before sourcing, as end-of-life status implies potential discontinuation by Renesas Electronics Corporation.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring a cost-effective, primary-side controller for half-bridge or full-bridge topologies. It is suitable for designs needing precise dead time control and robust protection features like overcurrent shutdown and thermal management. Consider the MSOP-8 package constraints and verify if the obsolete status aligns with long-term production requirements.

DC DC Switching Controllers Part Context

The ISL6744AAUZ belongs to the ISL6744A series of intermediate bus PWM controllers from Renesas Electronics Corporation (formerly Intersil). This series is characterized by its advanced BiCMOS technology, offering low start-up currents and high performance in switching frequency control. The 'AAUZ' suffix specifically denotes the MSOP-8 package variant optimized for compact designs.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.