ISL6744AUZ

DC DC Switching Controllers Overview

The ISL6744AUZ 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 soft-start, overcurrent shutdown, and internal over-temperature protection. Operating within a temperature range of -40°C to +105°C, it utilizes an 8-lead MSOP package.

DC DC Switching Controllers Feature Summary

• Provides precise duty cycle and dead time control with minimal propagation delay for fast overcurrent fault response
• Features low start-up and operating currents to facilitate easy biasing in AC/DC and DC/DC applications
• Integrates adjustable delayed overcurrent shutdown and restart mechanisms for enhanced system protection

DC DC Switching Controllers Applications

• Telecom power supplies
• Datacom isolated power systems
• Intermediate bus converters
• Half-bridge and full-bridge DC/DC transformers

DC DC Switching Controllers Procurement Notes

Verify component status carefully as the ISL6744AUZ is classified as obsolete by the manufacturer. Confirm availability through secondary distributors if immediate procurement is required. Ensure that any sourced units match the original RoHS compliance and lead-free specifications. Review datasheet revisions to confirm pinout compatibility with existing designs before finalizing acquisition plans.

DC DC Switching Controllers Selection Notes

Select this controller for cost-sensitive primary-side applications requiring high-speed switching in half-bridge or full-bridge configurations. The 1A gate driver capability supports moderate power levels, while the adjustable frequency allows optimization for efficiency. Consider the obsolete status when planning long-term production lifecycles and ensure alternative sourcing strategies are established for sustained manufacturing needs.

DC DC Switching Controllers Part Context

This component belongs to the ISL6744A series of intermediate bus PWM controllers. It is functionally identical to the ISL6744 but optimized for higher noise environments. The series represents an advanced BiCMOS design intended for unregulated DC/DC conversion, offering a balance of performance and minimal external component count for compact power supply designs.

DC DC Switching Controllers Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Due to the obsolete status, engineers must evaluate functional equivalents from other manufacturers or redesign using current generation controllers that support similar half-bridge/full-bridge topologies and drive requirements.