ISL6551AR-T

DC DC Switching Controllers Overview

The ISL6551AR-T is a zero voltage switching (ZVS) full-bridge PWM controller designed for isolated power systems. It implements a unique control algorithm to achieve fixed-frequency ZVS current mode control, enabling high efficiency and low electromagnetic interference (EMI). The device operates as a dual switching controller with a maximum switching frequency of 1000 kHz. It features two outputs and supports a maximum duty cycle of 50%. The component functions within an operating temperature range from -40°C to +105°C and utilizes a 28-pin QFN package measuring 6x6 mm.

DC DC Switching Controllers Feature Summary

• Implements zero voltage switching (ZVS) technology for high efficiency and reduced EMI in isolated power applications
• Utilizes fixed-frequency current mode control architecture for stable performance
• Supports full-bridge and push-pull regulator configurations for step-up/step-down DC-DC conversion

DC DC Switching Controllers Applications

• Isolated power supply systems
• Full-bridge DC-DC converters
• Push-pull regulator designs

DC DC Switching Controllers Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer source, as Intersil products are now managed by Renesas Electronics. Check for obsolescence notifications or alternate manufacturing site notices, as these components may have limited availability or discontinuation risks. Ensure compatibility with required humidity sensitivity levels during storage and handling.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring high-frequency operation up to 1 MHz with strict EMI constraints. The ZVS capability makes it suitable for efficient isolated power designs. Consider the 28-QFN package size for compact layouts. Verify that the 50% maximum duty cycle aligns with the specific transformer design requirements for full-bridge topologies.

DC DC Switching Controllers Part Context

The ISL6551 belongs to a family of switching controllers optimized for high-performance power management. This specific part number represents the surface-mount version in a QFN package. It complements other variants like the ISL6551ABZ, differing primarily in packaging and potentially minor operational parameters defined by the manufacturer's datasheet specifications.

DC DC Switching Controllers Replacement Considerations

Consult official datasheets for direct equivalents. The ISL6551ABZ shares similar functional characteristics but differs in package type (SOIC-Wide-28 vs. QFN). Verify pinout compatibility and thermal performance before substitution.