TEA1721A3T/N1/S1J

Power Supply Controllers, Monitors Overview

The TEA1721A3T/N1/S1J is an AC-DC flyback controller from the TEA172x family, manufactured by NXP USA Inc. It integrates a high-voltage start-up circuit and a power MOSFET, designed for cost-effective application designs with reduced component counts. This device provides advanced control modes to enhance efficiency in power supply systems. The specific part number variant corresponds to the TEA1721 series, which supports 5 W applications. While the provided documentation details variants such as TEA1721AT, BT, DT, and FT with burst frequencies of 430 Hz, 905 Hz, 1270 Hz, and 1750 Hz respectively, the exact electrical parameters for the 'A3' suffix are not explicitly defined in the source text beyond its classification within the 5 W integrated switch controller family.

Power Supply Controllers, Monitors Feature Summary

• Integrates a high-voltage start-up circuit and power MOSFET to reduce external component count.
• Provides advanced control modes for greater efficiency in AC-DC power supplies.
• Designed for cost-effective application design through high integration.

Power Supply Controllers, Monitors Applications

• AC-DC power supply controllers
• Flyback converter designs
• 5 W power application circuits

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix 'A3' against official NXP datasheets or ordering information, as standard public documents primarily list AT, BT, DT, and FT variants. Confirm package type and tape/reel specifications directly with the manufacturer or authorized distributors, as these details are not present in the provided reference material. Ensure compatibility with required burst frequency options if critical to the design.

Power Supply Controllers, Monitors Selection Notes

Select this component when designing compact AC-DC converters requiring integrated switching capabilities. Consider the TEA172x family's burst frequency options (430 Hz to 1750 Hz) available in related variants to meet specific acoustic or efficiency requirements. Evaluate the 5 W power capability against system load needs. Verify that the high-voltage start-up feature aligns with the input voltage range and startup time constraints of the target application.

Power Supply Controllers, Monitors Part Context

The TEA1721A3T/N1/S1J belongs to the TEA172x portfolio of AC-DC controllers with integrated power switches. This family is engineered to simplify power supply design by combining control logic and power switching into a single IC. The TEA1721 sub-series specifically targets low-power applications around 5 W, offering a balance between performance and bill-of-materials reduction compared to discrete solutions.

Power Supply Controllers, Monitors Replacement Considerations

Publicly confirmed substitute part numbers for the specific TEA1721A3T/N1/S1J variant are not available in the provided documentation. Related functional equivalents within the same family include TEA1721AT, TEA1721BT, TEA1721DT, and TEA1721FT, which share the same core architecture but differ in burst frequency characteristics. Cross-referencing with other manufacturers requires careful verification of pinout and electrical specifications.