TNY254P

AC DC Converters, Offline Switchers Overview

The TNY254P is an AC/DC converter from the TinySwitch family, designed for low-power offline applications. It integrates a 700 V power MOSFET, oscillator, high-voltage switched current source, and thermal shutdown circuitry into a single monolithic device. The component operates with a switching frequency of 44 kHz and supports a maximum duty cycle of 68%. It accepts an input voltage range from 85 VAC to 265 VAC and delivers a regulated output voltage of 5.8 V. The device features a low operating supply current of 140 uA and functions within a temperature range of -40 C to +150 C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with high-voltage startup circuitry, eliminating the need for transformer bias windings.
• Utilizes simple ON/OFF control scheme that removes the requirement for loop compensation devices.
• Provides extremely energy-efficient performance with negligible standby power consumption at no load.

AC DC Converters, Offline Switchers Applications

• Cellular phone chargers
• Standby power supplies for PC, TV, and VCR
• Utility meters
• Cordless phones

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific package variant required, as the TNY254P designation typically indicates a PDIP-8 through-hole package, while other suffixes like GN denote SMD options. Confirm availability status, as certain variants may be marked as Not Recommended for New Designs (NRND). Ensure compliance with RoHS standards and check humidity sensitivity handling requirements during storage and assembly.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-sensitive designs requiring minimal external components and simplified transformer construction. It is suitable for applications where space constraints allow for DIP packaging and universal input voltage operation is necessary. Consider the thermal characteristics and ensure adequate heat dissipation within the specified operating temperature range for reliable long-term performance.

AC DC Converters, Offline Switchers Part Context

The TNY254P belongs to the TinySwitch family, which provides low-cost, high-efficiency off-line switcher solutions in the 0 to 10 W range. This family distinguishes itself by integrating all essential control and power functions onto a single chip, reducing system complexity and component count compared to discrete PWM or hybrid solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult official Power Integrations resources for cross-referencing compatible alternatives or updated family members.