ISL6551AR

DC DC Switching Controllers Overview

The ISL6551AR is a ZVS Full Bridge PWM Controller IC designed for high-efficiency positive output step-up/step-down DC-DC applications. It operates as a dual switching controller with current-mode control and pulse width modulation techniques. The device supports high-frequency operation up to 1 MHz, enabling compact magnetic component designs. It features a maximum duty cycle of 50% and functions within a supply voltage range centered around 12 V. The unit is housed in a 28-QFN (6x6) package and is rated for industrial temperature ranges from -40°C to +105°C.

DC DC Switching Controllers Feature Summary

• Supports Zero Voltage Switching (ZVS) for full-bridge and push-pull topologies
• Utilizes current-mode control with pulse width modulation for precise regulation
• Enables high-frequency operation up to 1 MHz for reduced passive component size

DC DC Switching Controllers Applications

• High-efficiency DC-DC power supplies
• Server and workstation power architectures
• Industrial power conversion systems

DC DC Switching Controllers Procurement Notes

Verify the specific status of this component through official Renesas or Intersil channels, as legacy products may be subject to discontinuation notices. Confirm that the 28-QFN package variant matches your PCB footprint requirements. Ensure compliance with RoHS directives and moisture sensitivity levels specified in the final datasheet before integration into production designs.

DC DC Switching Controllers Selection Notes

Select this controller for designs requiring high efficiency in full-bridge or push-pull configurations. The 1 MHz switching frequency allows for smaller transformers and inductors compared to lower-frequency alternatives. Ensure the application demands current-mode control characteristics and can accommodate the thermal profile of the QFN package within the specified operating temperature range.

DC DC Switching Controllers Part Context

The ISL6551AR belongs to the ISL6551 family of power management integrated circuits manufactured by Intersil, now part of Renesas Electronics. This series targets advanced power conversion needs where efficiency and size are critical. As an analog IC, it serves as a core control element in modern switching power regulators, bridging the gap between microcontroller logic and high-power stage drivers.

DC DC Switching Controllers Replacement Considerations

Consult official product legacy documents for confirmed substitute part numbers. Check for direct pin-compatible equivalents within the same manufacturer's portfolio that maintain identical control modes and package dimensions to ensure seamless design migration.