ISL6843IRZ-T

Power Supply Controllers, Monitors Overview

The ISL6843IRZ-T is an improved industry standard single-ended current mode PWM controller manufactured by Intersil, now part of Renesas Electronics. It operates within a temperature range of -40°C to +105°C and utilizes an 8-lead 2x3 mm DFN package. The device supports Boost, Flyback, and Buck topologies with a maximum switching frequency of 2MHz. It features 100% duty cycle capability and includes under-voltage lockout (UVL) at 8.4V. The component is RoHS compliant and Pb-free.

Power Supply Controllers, Monitors Feature Summary

• Supports multiple power converter topologies including Boost, Flyback, and Buck configurations
• Features 100% duty cycle operation for high-efficiency applications
• Includes integrated under-voltage lockout protection mechanism

Power Supply Controllers, Monitors Applications

• Industrial power systems
• Consumer electronics power supplies
• Telecommunications equipment

Power Supply Controllers, Monitors Procurement Notes

Verify the manufacturer designation as Intersil or Renesas Electronics Corporation depending on the supply chain source. Confirm the package type is 8-DFN (2x3) and the suffix IRZ indicates industrial temperature grade (-40 to +105°C). Ensure the part is marked as Pb-Free and RoHS compliant. Check for specific tape-and-reel packaging if indicated by the 'T' suffix in the ordering code.

Power Supply Controllers, Monitors Selection Notes

Select this component when a pin-compatible replacement for the legacy 384x family is required with enhanced performance. It is suitable for designs needing adjustable frequency up to 2MHz and support for isolated or non-isolated topologies. Consider the 8-lead DFN package for space-constrained PCB layouts requiring thermal efficiency.

Power Supply Controllers, Monitors Part Context

The ISL6843 belongs to the ISL684x family of low-power PWM controllers from Intersil/Renesas. This family offers BiCMOS design improvements over older standards while maintaining pin compatibility. The series includes variants like ISL6840 through ISL6844, differing primarily in feature sets and configuration options for various power management needs.

Power Supply Controllers, Monitors Replacement Considerations

The datasheet notes pin compatibility with the industry standard 384x family controllers. Designers replacing legacy parts should verify that the improved performance characteristics align with the existing circuit requirements without necessitating major layout changes.