TNY274PN

AC DC Converters, Offline Switchers Overview

The TNY274PN is an integrated offline switcher from the TinySwitch-III family, designed for AC/DC conversion. It features a built-in 700V power MOSFET and operates at a switching frequency of 132 kHz. The device supports a maximum output power of 8.5 W at 85-265 VAC input, extending to 11 W at 230 VAC. It utilizes ON/OFF control for high efficiency at light loads. Key electrical parameters include a maximum duty cycle of 65% and a quiescent supply current of 275 uA. The component is housed in an 8-pin DIP package and functions within a temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700V power MOSFET with oscillator, high-voltage current source, and thermal shutdown circuitry.
• Employs ON/OFF control scheme to maintain constant efficiency under extremely light load conditions.
• Features self-biasing capability eliminating the need for bias windings or auxiliary components.
• Includes comprehensive protection mechanisms such as current limit, overvoltage, and auto-restart thermal shutdown.

AC DC Converters, Offline Switchers Applications

• Chargers and adapters for mobile phones and cordless telephones
• Power supplies for PDAs, digital cameras, and MP3 players
• Standby power sources for PCs and set-top decoders
• Appliance and industrial system auxiliary power

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific ordering suffix to confirm the package type and tape/reel configuration, as variations exist between tube and reel packaging. Ensure the selected variant matches the required lead time and availability status for production schedules. Cross-reference the manufacturer's latest datasheet to confirm RoHS compliance and environmental declarations prior to finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring minimal external components and single-sided PCB layout capabilities. It is suitable for applications demanding strict adherence to global energy efficiency regulations due to its low no-load power consumption. Consider the fixed switching frequency and ON/OFF control characteristics when designing for specific EMI and transient response requirements.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TinySwitch-III series, which offers enhanced flexibility and extended power ranges compared to previous generations. The series is characterized by high integration levels that reduce system costs and improve reliability. It represents a solution for low-power offline applications where size, cost, and efficiency are critical design constraints.

AC DC Converters, Offline Switchers Replacement Considerations

Public documentation lists TNY274P, TNY274PG, and TNY274PTL as related variants within the same product family. Verify pinout compatibility and specific package dimensions before substitution. Confirm that alternative suffixes meet the same electrical specifications and thermal performance requirements.

AC DC Converters, Offline Switchers FAQ

Does the TNY274PN require a bias winding?

No, the device features self-biasing capability, which eliminates the need for bias windings or additional bias components.

What control scheme does the TNY274PN use?

It uses an ON/OFF control scheme, which provides constant efficiency at extremely light loads and helps meet stringent standby power regulations.