TOP221Y

AC DC Converters, Offline Switchers Overview

The TOP221Y is a three-terminal off-line PWM switch from the TOP221 series, manufactured by Power Integrations. It integrates a high-voltage MOSFET with a current-mode controller for AC/DC conversion. The device supports Buck, Boost, Flyback, and Forward topologies with a maximum switching frequency of 100 kHz. It operates within an input voltage range of 85 VAC to 265 VAC, delivering up to 30 W at 85-265 VAC or 50 W at 100/115/230 VAC. The component features a TO-220-3 through-hole package and functions reliably across 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 in a single package
• Supports multiple converter topologies including Flyback, Forward, Buck, and Boost
• Includes built-in protection mechanisms such as cycle-by-cycle current limiting and thermal shutdown

AC DC Converters, Offline Switchers Applications

• Universal input offline power supplies
• Battery chargers
• General-purpose isolated DC/DC converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix and revision level against the manufacturer's latest datasheet to ensure compatibility with design requirements. Confirm RoHS compliance status as historical data indicates potential non-compliance for older batches. Check moisture sensitivity levels and storage conditions prior to assembly to prevent package damage during soldering processes.

AC DC Converters, Offline Switchers Selection Notes

Select this component for applications requiring a simple, cost-effective solution for low-power isolated conversions. The integrated nature reduces external component count compared to discrete designs. Ensure the thermal management strategy accommodates the TO-220-3 package limitations under full load conditions within the specified operating temperature range.

AC DC Converters, Offline Switchers Part Context

The TOP221Y belongs to the TOP221 family of off-line PWM switches designed for universal input applications. This series is characterized by its simplicity and robustness, targeting consumer electronics and industrial equipment. The Y variant specifically denotes the TO-220-3 through-hole package option, distinguishing it from surface-mount counterparts like the GN series.

AC DC Converters, Offline Switchers Replacement Considerations

TOP221GN: Surface mount equivalent with identical electrical characteristics but different packaging.