FSL4110LRLX

AC DC Converters, Offline Switchers Overview

The FSL4110LRLX is an integrated power switch and load switch component manufactured by onsemi. It combines a PWM controller with a high-voltage SenseFET, designed for offline switching mode power supplies (SMPS). The device features a fixed-frequency oscillator, under-voltage lockout, leading-edge blanking, and optimized gate drive. It includes internal soft-start and temperature-compensated current sources for loop compensation. The integrated high-voltage power supply regulator eliminates the need for auxiliary bias windings.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 1000 V avalanche robust SenseFET with a PWM controller to minimize external component count.
• Includes an integrated high-voltage power supply regulator that removes the requirement for auxiliary bias windings.
• Features comprehensive protection circuits including under-voltage lockout and leading-edge blanking.
• Provides optimized gate driving and internal soft-start capabilities for enhanced system reliability.

AC DC Converters, Offline Switchers Applications

• Offline switching mode power supplies
• Flyback converter designs
• Cost-efficient AC-DC power conversion systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix LRLX against official datasheets to confirm package type and tape-and-reel specifications. Ensure compatibility with required thermal management solutions for the SMD7 package. Confirm regulatory compliance status such as RoHS or REACH if applicable to your region. Cross-reference the manufacturer's latest documentation for any pinout revisions or handling instructions prior to integration.

AC DC Converters, Offline Switchers Selection Notes

Select this component when designing offline SMPS applications requiring minimal external parts and high voltage tolerance. The integrated SenseFET simplifies design compared to discrete MOSFET and controller combinations. Consider the fixed-frequency operation and internal compensation features for stable performance in flyback topologies. Evaluate the thermal requirements associated with the integrated power stage for your specific power level.

AC DC Converters, Offline Switchers Part Context

This part belongs to onsemi's SenseFET family, which integrates high-voltage power switches with control logic. These devices are engineered to reduce bill of materials and PCB footprint in offline power supplies. The FSL4110LRLX specifically targets cost-sensitive applications where high efficiency and reliability are critical without complex external circuitry.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for compatible SenseFETs with similar voltage ratings and current capabilities. Verify pin-to-pin compatibility and electrical characteristics before replacing existing designs. Check for updated versions within the same product family that may offer improved performance or packaging options.

AC DC Converters, Offline Switchers FAQ

Does the FSL4110LRLX require an auxiliary winding?

No, the device includes an integrated high-voltage power supply regulator that provides VCC without needing an auxiliary bias winding.

What protection features are included in the FSL4110LRLX?

It includes under-voltage lockout, leading-edge blanking, and various other protection circuits to ensure safe operation.