FSFM300N

AC DC Converters, Offline Switchers Overview

The FSFM300N is an integrated high-voltage power switching regulator combining a quasi-resonant PWM controller with a built-in 650V avalanche-rugged SenseFET. Designed for offline AC-DC flyback converters, it operates at a nominal frequency of 67kHz with a maximum of 73kHz. The device supports input voltages from 7.7V to 26V and delivers up to 1.44A output current. It features soft start functionality and is housed in an 8-DIP through-hole package suitable for applications requiring up to 30W rated power.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a quasi-resonant PWM controller with a 650V avalanche-rugged SenseFET for efficient power conversion.
• Includes comprehensive protection mechanisms against over-current, over-voltage, and thermal faults.
• Features soft-start capability to minimize inrush current during startup sequences.

AC DC Converters, Offline Switchers Applications

• Offline AC-DC flyback converters
• General-purpose power supplies
• Adapters and chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific ordering suffix against the manufacturer's official datasheet to ensure correct packaging and temperature grade specifications. Confirm that the component meets RoHS compliance requirements for your target market. Cross-reference the pinout diagram with your PCB layout to ensure compatibility with the 8-DIP through-hole package configuration before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a fully integrated solution for low-to-medium power offline applications. Ensure the design accommodates the 650V breakdown voltage and 1.44A current limits. Verify that the system topology aligns with the specified flyback architecture and that the operating temperature range covers the intended environmental conditions.

AC DC Converters, Offline Switchers Part Context

This part belongs to onsemi's SenseFET family, which combines advanced control logic with high-voltage power switches. It serves as a compact alternative to discrete controller and MOSFET combinations, reducing component count and board space. The integration simplifies design complexity while maintaining high efficiency in standard offline power supply architectures.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official cross-reference lists for direct substitutes. Verify electrical parameters such as breakdown voltage, current rating, and package dimensions match the original specification before substitution.