IFXICE3BR4765JFKLA1
Overview
The ICE3BR4765JFKLA1 is an integrated offline flyback controller with an internal CoolMOS power switch, designed for isolated power supply designs up to 27W. Operating at a fixed 65kHz switching frequency, it simplifies SMPS design by integrating high-voltage startup and comprehensive fault protection into a single 8-pin DIP package. The device features Active Burst Mode to achieve low standby power consumption, making it suitable for energy-efficient electronics.
Why Choose This Part
This controller integrates a 650V breakdown MOSFET and high-voltage startup cell, reducing external component count and PCB footprint. It includes frequency jittering to lower EMI signatures and an extendable blanking window to handle high-load jumps without triggering false protection trips.
Applications
Key Specifications
Getting Started
Design begins by selecting a flyback transformer with a primary inductance suited for the 65kHz switching frequency and 75 percent maximum duty cycle. Use Infineon's Power Design Tool or Excel-based calculation sheets to determine the RCD snubber values and compensation network for the feedback loop. Ensure the VDD capacitor is sized to provide sufficient energy during the 18V startup phase before the auxiliary winding takes over.
