FSL136MRTWDTU

AC DC Converters, Offline Switchers Overview

The FSL136MRTWDTU is a 650V integrated power switch featuring an avalanche-resistant SenseFET and current-mode PWM controller. It operates at a fixed frequency of 67kHz with adjustable peak current limiting. The device includes internal startup, soft start (15 ms), and comprehensive protection mechanisms such as OVP, OLP, OSP, AOCP, TSD, and UVLO. Designed for offline flyback converters up to 26W, it achieves standby power below 50 mW at 265 VAC in intermittent mode. Key electrical parameters include a 4Ω on-resistance, 1.8 mA operating current, and operation within -40°C to +105°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates high-voltage power switch with optimized gate driver and current-mode PWM control
• Provides multiple fault protections including overvoltage, overload, output short circuit, and thermal shutdown
• Features Green Mode technology for low standby power consumption in light load conditions
• Includes internal startup circuitry and precise temperature-compensated current source

AC DC Converters, Offline Switchers Applications

• Home appliances
• Industrial motor drives
• Smart grid equipment
• LED televisions

AC DC Converters, Offline Switchers Procurement Notes

Verify the suffix 'TWDTU' corresponds to the TO-220F package variant rather than the standard PDIP W package. Confirm manufacturer lineage from Fairchild Semiconductor to onsemi for datasheet consistency. Ensure design-in documentation references the specific thermal characteristics of the through-hole mounting option.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-efficient offline flyback designs requiring minimal external parts. It serves as a direct replacement for discrete MOSFET and PWM controller combinations. Consider the 4Ω on-resistance for efficiency targets and verify compatibility with the required voltage rating for the specific transformer design.

AC DC Converters, Offline Switchers Part Context

This part belongs to the Fairchild Power Switch (FPS) family, which combines a high-voltage MOSFET with intelligent control logic. The series is engineered to reduce system size and weight while improving reliability compared to traditional discrete solutions. It represents a mature platform for general-purpose AC-DC conversion applications.

AC DC Converters, Offline Switchers Replacement Considerations

The FSL136MR is the base part number; the TWDTU suffix indicates the TO-220F package. Verify pinout compatibility if substituting with other FPS variants. Cross-reference with FSL126MRTWDTU for lower power requirements or different package constraints.