TNY279PN

AC DC Converters, Offline Switchers Overview

The TNY279PN is a TinySwitch-III intelligent power switch from Power Integrations, designed for offline AC/DC conversion. It integrates a 700V power MOSFET with control circuitry in an 8-pin DIP package. The device operates at a switching frequency of 132 kHz and supports a maximum duty cycle of 65%. It delivers up to 25W output power within the 85-265 VAC input range and 32W at 230 VAC. The IC features a low operating supply current of 510 uA and functions reliably across a temperature range of -40°C to +150°C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates ON/OFF control scheme eliminating the need for loop compensation
• Features self-biasing architecture removing the requirement for bias windings or components
• Includes precise hysteretic thermal shutdown with automatic recovery capabilities
• Utilizes frequency jitter to reduce electromagnetic interference filter costs

AC DC Converters, Offline Switchers Applications

• Mobile phone and cordless telephone chargers
• PC standby and auxiliary power supplies
• DVD players and PVR set-top box decoders
• Consumer home appliances
• Industrial systems and metering power sources

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix PN indicates the PDIP-8 through-hole package configuration. Confirm RoHS compliance status via official documentation before integration. Ensure design parameters align with the specified 700V breakdown voltage and thermal limits. Cross-reference datasheet revisions to confirm pinout consistency for PCB layout.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring high flexibility and minimal external parts count. The adjustable current limit allows optimization for either peak power or continuous output efficiency. Consider the strict I2f parameter tolerances for cost-effective transformer sizing. Ideal for applications demanding simple implementation without complex feedback loops.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TinySwitch-III series, which offers enhanced power ranges compared to previous generations. The family provides interchangeable solutions across different packages while maintaining consistent control logic. The TNY279PN specifically targets mid-range power applications requiring robust protection features and high efficiency under light loads.

AC DC Converters, Offline Switchers Replacement Considerations

TNY279GN (SMD variant)

AC DC Converters, Offline Switchers FAQ

How is the current limit adjusted?

The current limit point is user-selectable by varying the capacitance value on the BP/M pin.

Does the device require a bias winding?

No, the integrated self-biasing feature eliminates the need for auxiliary bias windings or components.