IFXICE5QR4770AZ
Overview
The ICE5QR4770AZ is a quasi-resonant flyback controller with an integrated 700V CoolMOS power switch, designed for offline switch mode power supplies up to 27W. It operates in quasi-resonant mode for high efficiency and features Active Burst Mode to achieve low standby power consumption below 100mW. The device includes a comprehensive suite of protection features and a digital soft start to minimize component stress during power-up.
Why Choose This Part
The integration of a 700V MOSFET into a DIP-7 package simplifies PCB layout and reduces the external bill of materials. Quasi-resonant switching reduces EMI and switching losses, while the internal 16V start-up cell and Active Burst Mode enable very low standby current of 320uA.
Applications
Key Specifications
Getting Started
Designers should begin by calculating the transformer primary inductance based on the 27W power limit and minimum AC input voltage. Use the Infineon Power Multitool or Excel-based design tools to determine the RCD snubber values and compensation network for the feedback loop. Ensure the PG-DIP-7 package is properly heat-sinked through the PCB copper planes as the operating junction temperature is rated up to 125 degrees Celsius.
