FAN6921MRMY

Overview

The FAN6921MRMY is an integrated power management IC combining a Critical Mode Power Factor Correction (PFC) controller and a Quasi-Resonant Current Mode PWM controller. Manufactured by onsemi, it utilizes SOP-16 surface-mount packaging with dimensions of 10 x 4 x 1.5 mm. The device operates within a temperature range of -40°C to +105°C and supports a maximum supply voltage of 25V. It features a switching frequency capability up to 60kHz and includes zero-power detection functionality.

Feature Summary

• Integrates Boundary Conduction Mode PFC and Quasi-Resonant PWM controllers into a single component
• Supports dual-switch quasi-resonant flyback converter topologies in the back end
• Includes zero-power detection for enhanced efficiency at light loads

Applications

• AC-DC power supplies utilizing front-end BCM PFC and back-end QR flyback stages
• Adapters requiring high power factor correction and low standby power consumption
• General-purpose power management systems for consumer electronics

Procurement Notes

Verify current lifecycle status as the FAN6921 series may be subject to discontinuation or Not Recommended for New Design (NRND) classifications. Confirm package availability and moisture sensitivity levels prior to ordering. Ensure compatibility with existing design specifications regarding operating temperatures and voltage limits.

Selection Notes

Select this component for designs requiring integrated PFC and PWM control to reduce external component count. Verify that the required switching frequency aligns with the device's 60kHz limit. Consider thermal performance within the specified -40°C to +105°C range during system integration.

Part Context

This part belongs to the FAN6921 family of integrated controllers from onsemi, formerly Fairchild Semiconductor. These devices are designed to simplify power supply architectures by merging two distinct control functions. The SOP-16 package provides a compact solution for space-constrained applications.

Replacement Considerations

The FAN6921MLMY is a documented equivalent within the same product family. Verify pinout compatibility and electrical parameters before substitution.