R7731AGE

AC DC Converters, Offline Switchers Overview

The R7731AGE is an offline flyback switching converter manufactured by Richtek USA Inc., designed for isolated power supply applications. It operates with a fixed switching frequency of 65kHz and supports a duty cycle of up to 75%. The device functions within a supply voltage range of 12V to 25V, requiring a startup voltage of 14V. Packaged in a compact SOT-23-6 surface-mount format, it integrates comprehensive protection mechanisms including current limiting, over-load, over-temperature, and over-voltage safeguards. The component is rated for operation across a temperature range of -40°C to 85°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrated flyback topology for isolated offline conversion
• Built-in multi-protection circuitry for system safety
• Compact SOT-23-6 surface-mount packaging

AC DC Converters, Offline Switchers Applications

• Offline AC/DC power supplies
• Isolated DC/DC converters
• General purpose power adapters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's official datasheet to ensure compatibility with design requirements. Confirm end-of-life status and final order dates through authorized distributors, as availability may be restricted. Cross-reference the manufacturer part number with distributor codes to prevent procurement errors due to naming variations or obsolete stock listings.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a simple, cost-effective offline solution with integrated protections. Ensure the external transformer and passive components are sized correctly for the 65kHz operating frequency. Verify that the input voltage range aligns with the 12V to 25V Vcc requirement and that thermal management suits the SOT-23-6 package constraints.

AC DC Converters, Offline Switchers Part Context

This part belongs to the R7731 family of offline controllers from Richtek Technology. It is specifically engineered for low-power isolated applications where space efficiency and basic protection features are prioritized. The device represents a standard solution for consumer electronics and industrial auxiliary power supplies requiring galvanic isolation.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct pin-to-pin replacements within the same product family or newer generations from Richtek. Verify that any substitute maintains the 65kHz frequency and SOT-23-6 footprint. Consult official cross-reference lists for confirmed equivalents.