FSCQ1565RTYDTU

AC DC Converters, Offline Switchers Overview

The FSCQ1565RTYDTU is a high-voltage power switch integrating a PWM controller and a 650V MOSFET in a TO-3P package. It utilizes Quasi-Resonant Control (QRC) technology to minimize switching losses and acoustic noise. The device features an internal 15V startup voltage threshold and operates within a Vcc range of 9V to 20V. Designed for flyback topologies, it supports output powers up to 250W with a maximum duty cycle of 95% at a 20kHz switching frequency. Integrated protection mechanisms include current limiting, overload protection, over-temperature shutdown, and overvoltage protection.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage 650V MOSFET with a dedicated PWM controller for compact design.
• Employs Quasi-Resonant Control (QRC) technology to reduce switching losses and electromagnetic interference.
• Includes comprehensive fault protection features such as over-temperature, overvoltage, and current limiting.
• Features an internal high-voltage current source for simplified biasing in offline applications.

AC DC Converters, Offline Switchers Applications

• High-efficiency AC/DC adapters
• Telecommunications power supplies
• Consumer electronics power stages

AC DC Converters, Offline Switchers Procurement Notes

Verify the exact suffix 'RTYDTU' against official onsemi documentation, as standard listings often reference 'RPSYDTU'. Confirm component availability status, as specific variants may be subject to discontinuation or lifecycle changes. Ensure the procurement channel provides valid traceability documents. Cross-reference the datasheet revision date to guarantee compatibility with current manufacturing standards and regulatory requirements.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring integrated high-voltage switching and quasi-resonant operation to enhance efficiency. The TO-3P package facilitates thermal management for higher power outputs. Evaluate the 650V breakdown voltage against input line conditions. Consider the fixed 20kHz switching frequency for transformer design constraints. Verify that the integrated protections meet the safety requirements of the target application without external circuitry.

AC DC Converters, Offline Switchers Part Context

This part belongs to the QRC family of power switches from onsemi, designed for offline power conversion. It combines control logic and power switching into a single monolithic structure. The series targets applications demanding high reliability and reduced component count. The integration simplifies the design process by eliminating the need for separate driver circuits and discrete protection components.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct pin-compatible substitutes within the same QRC family. Verify electrical parameters such as breakdown voltage and switching frequency match the original design requirements. Ensure thermal characteristics and package dimensions are compatible with existing PCB layouts and heatsinking solutions.