FSL126HR

AC DC Converters, Offline Switchers Overview

The FSL126HR is a Green Mode Fairchild Power Switch (FPS) AC/DC converter designed for flyback topology applications. It integrates a high-voltage power MOSFET and control circuitry into a single DIP-8 package. The device operates with a switching frequency range of 90 kHz to 110 kHz and supports a maximum duty cycle of 83%. It delivers an output current of 2 A with a rated output power of 21 W. The component functions within an input voltage range of 9 V to 14 V and maintains a working supply current of 2.5 mA. It is engineered for isolated power conversion with a wide operating temperature range from -40 °C to +105 °C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates Green Mode technology for enhanced energy efficiency and reduced standby power consumption.
• Combines a high-voltage power switch and current-mode controller in a compact DIP-8 package.
• Provides built-in protection features including cycle-by-cycle current limiting and thermal shutdown.

AC DC Converters, Offline Switchers Applications

• Adapters for mobile phones and portable electronics
• Battery chargers for consumer devices
• Low-power offline AC/DC power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific ordering suffix and revision level against the official onsemi datasheet to ensure compatibility with design requirements. Confirm that the component status aligns with long-term availability plans, as lifecycle changes may affect production continuity. Cross-reference pinout configurations and thermal characteristics during the integration phase to prevent implementation errors.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a cost-effective, integrated solution for low-power isolated AC/DC conversion. The fixed switching frequency and internal power switch simplify the external component count. Ensure the application demands fall within the specified 21 W output power limit and 14 V input voltage range. Evaluate thermal management needs given the through-hole DIP-8 packaging constraints.

AC DC Converters, Offline Switchers Part Context

The FSL126HR belongs to the FSL1xxHR series of Green Mode FPS controllers from onsemi. This family targets general-purpose AC/DC converters where size, cost, and efficiency are critical. It represents a transition from discrete solutions to highly integrated monolithic ICs, reducing board space and assembly complexity for standard flyback topologies.

AC DC Converters, Offline Switchers Replacement Considerations

Consult the official onsemi documentation for verified substitute part numbers. Direct replacements must match the DIP-8 package, flyback topology support, and equivalent electrical ratings. Verify functional compatibility before substitution.