FSQ110

AC DC Converters, Offline Switchers Overview

The FSQ110 is a Green Mode Fairchild Power Switch (FPS) integrating a current-mode Pulse Width Modulator (PWM) controller with an avalanche-rugged 650V SenseFET. Housed in an 8-pin PDIP package, this offline switcher operates within a temperature range of -40°C to +85°C. It features a built-in high-voltage current source for startup and includes comprehensive protection mechanisms such as cycle-by-cycle current limiting, overvoltage lockout, and thermal shutdown.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a current-mode PWM controller with a ruggedized 650V power MOSFET
• Incorporates Green Mode technology for reduced no-load power consumption
• Includes internal high-voltage current source for simplified biasing
• Provides multi-stage protection including thermal shutdown and overvoltage lockout

AC DC Converters, Offline Switchers Applications

• Offline switchers for AC-DC converters
• Standby power supplies for consumer electronics
• Battery chargers for portable devices
• Adapters for telecommunications equipment

AC DC Converters, Offline Switchers Procurement Notes

Verify the manufacturer marking on the component body to confirm it originates from Fairchild Semiconductor or its successor entity, onsemi. Ensure the part number matches the specific Green Mode FPS variant. Check for any suffixes that might indicate tape-and-reel packaging versus bulk distribution, although standard procurement typically involves DIP-8 packages. Confirm compliance with relevant environmental directives if required for your specific manufacturing region.

AC DC Converters, Offline Switchers Selection Notes

Select the FSQ110 when designing cost-effective offline power supplies requiring integrated control and switching capabilities. Its Green Mode feature makes it suitable for applications demanding low standby power consumption. The integrated high-voltage current source simplifies transformer design by eliminating the need for auxiliary windings during startup. Consider its thermal performance and the 650V breakdown voltage when sizing components for mains-connected applications.

AC DC Converters, Offline Switchers Part Context

The FSQ110 belongs to the Fairchild Power Switch (FPS) family, which combines power switching and control functions into a single IC. This integration reduces component count and board space compared to discrete solutions using separate controllers and MOSFETs. The Green Mode variant specifically targets energy efficiency standards for consumer electronics and adapters.

AC DC Converters, Offline Switchers Replacement Considerations

Direct replacements may include other FPS series parts from onsemi/Fairchild with similar pinouts and electrical characteristics. Verify compatibility regarding gate drive strength, current limit thresholds, and operating frequency before substitution.