TOP221YN

AC DC Converters, Offline Switchers Overview

The TOP221YN is an AC-DC converter from the TOPSwitch-II series by Power Integrations. It integrates a high-voltage power switch with a current-mode controller in a TO-220-3 package. The device operates at a switching frequency of 100 kHz and supports input voltages from 85 VAC to 265 VAC. It provides a maximum output power of 7 W, with a breakdown voltage of 700 V and a maximum duty cycle of 70%. The component functions within a temperature range of -40 °C to +150 °C.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with a current-mode controller for compact design
• Includes built-in high-voltage current source for startup operation
• Features integrated fast-recovery diode for improved efficiency
• Provides comprehensive protection against overcurrent, overtemperature, and overvoltage

AC DC Converters, Offline Switchers Applications

• General-purpose offline power supplies
• Battery chargers
• Standby power supplies for consumer electronics
• Industrial control systems

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'YN' corresponds to the through-hole TO-220-3 package variant. Confirm RoHS compliance status as required by project specifications. Check the manufacturer's lifecycle status, as this model may be designated Not For New Designs (NRND). Ensure compatibility with existing PCB footprints before procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component for low-power applications requiring high integration and minimal external components. Consider the 7 W output limit when designing the transformer. Evaluate thermal management requirements due to the single-chip architecture. Verify that the 100 kHz switching frequency aligns with EMI constraints.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-II family, which combines a power MOSFET and controller into a single monolithic IC. This integration reduces bill of materials and board space compared to discrete solutions. The TOP221 variant specifically targets lower power ranges within this series.

AC DC Converters, Offline Switchers Replacement Considerations

TOP222YN offers higher power capability within the same package.