TNY174PN

AC DC Converters, Offline Switchers Overview

The TNY174PN is an isolated AC/DC converter from the TinySwitch-LT family, designed for off-line applications. It integrates a 650 V silicon power switch and controller into a single DIP-8C package. The device supports universal input voltages ranging from 85 VAC to 265 VAC. It delivers up to 8.5 W at 85-265 VAC and 11 W at 230 VAC. Key electrical parameters include a switching frequency of 132 kHz, a maximum duty cycle of 65%, and a supply current of 75 mA. The output voltage capability reaches 50 V with an output current of 275 uA. Operating temperatures range from -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage 650 V silicon power switch with a proprietary control IC in a compact DIP-8C package.
• Provides complete off-line converter functionality including startup, soft-start, and thermal shutdown within a single component.
• Features fixed-frequency operation at 132 kHz to minimize electromagnetic interference filtering requirements.

AC DC Converters, Offline Switchers Applications

• Universal input offline power supplies
• Battery chargers for consumer electronics
• Standby power supplies for appliances

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix PN confirms the through-hole DIP-8C package configuration. Confirm RoHS compliance status via the manufacturer's official documentation. Ensure the ordering part number matches the required isolation and voltage ratings for the target design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring integrated high-voltage switching without external discrete MOSFETs. The fixed 132 kHz frequency simplifies magnetics design compared to variable frequency alternatives. Verify that the 8.5 W to 11 W power envelope meets the load requirements before finalizing the schematic.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TinySwitch-LT series, which focuses on energy-efficient offline conversion. It serves as a drop-in replacement for older generations like the TNY26x series in many legacy designs, offering improved performance in a standard DIP-8 footprint.

AC DC Converters, Offline Switchers Replacement Considerations

The TNY264PN is a documented substitute within the same manufacturer portfolio. Both parts share similar DIP-8 packaging and functional integration, though power ratings and specific electrical characteristics may differ slightly between the LT and original series.

AC DC Converters, Offline Switchers FAQ

What is the maximum operating junction temperature?

The maximum operating temperature is specified as +150°C.

Does the TNY174PN require an external transformer?

Yes, it requires an external isolated flyback transformer to function as an AC/DC converter.