TNY253P

AC DC Converters, Offline Switchers Overview

The TNY253PN 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 DIP-8 package. The device operates with a switching frequency of 44 kHz and supports a maximum duty cycle of 68%. It delivers up to 2 W output power at 5.8 V and 165 mA from a universal input range of 85 VAC to 265 VAC. The component functions within a temperature range of -40°C to +150°C TJ and consumes approximately 80 mW at no load.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with control circuitry to eliminate 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 minimal no-load power consumption.
• Includes built-in current limit and thermal shutdown protection for enhanced reliability.

AC DC Converters, Offline Switchers Applications

• Cellular phone chargers
• Standby power supplies for PCs, TVs, and VCRs
• Utility meters
• Cordless phones

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., PN for PDIP) against design requirements. Confirm RoHS compliance status via official datasheets. Check for any Product Change Notifications regarding leadframe or assembly sources. Ensure availability aligns with project timelines as components may be marked not recommended for new designs.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-sensitive, low-power offline converter designs requiring minimal external components. It serves as a direct replacement for bulky linear adapters. Consider the 44 kHz switching frequency and integrated protection features when designing EMI filters and thermal management solutions for the target application environment.

AC DC Converters, Offline Switchers Part Context

The TNY253PN belongs to the TinySwitch family, which offers a breakthrough design for high-efficiency off-line switching in the 0 to 10 W range. This series is characterized by its ability to start up and run on power derived directly from the DRAIN voltage, simplifying transformer design and reducing overall system cost compared to discrete PWM solutions.

AC DC Converters, Offline Switchers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.