TOP221P

AC DC Converters, Offline Switchers Overview

The TOP221P is an integrated off-line switcher from the TOPSwitch-II family, combining a high-voltage power MOSFET with PWM control circuitry in a single package. It operates at a switching frequency of 100 kHz and supports boost, buck, flyback, and forward topologies. The device features a 700 V breakdown voltage and accepts an input voltage range of 85 VAC to 265 VAC. It delivers up to 9 W of output power and includes internal current limit and thermal shutdown protection.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with pulse width modulation controller
• Provides comprehensive fault protection including current limiting and thermal shutdown
• Supports multiple converter topologies such as flyback and forward

AC DC Converters, Offline Switchers Applications

• General purpose AC/DC converters
• Battery chargers
• Offline power supplies

AC DC Converters, Offline Switchers Procurement Notes

Verify component status carefully as this part may be discontinued or not recommended for new designs. Confirm RoHS compliance requirements against specific project standards, noting that some records indicate non-compliance. Ensure the DIP-8 through-hole package matches the target PCB layout before ordering.

AC DC Converters, Offline Switchers Selection Notes

Select this component for low-power offline applications requiring simplified design due to integrated MOSFET and controller. Consider the 100 kHz switching frequency for transformer sizing. Evaluate the 9 W power capability against load requirements and ensure adequate thermal management for the operating temperature range.

AC DC Converters, Offline Switchers Part Context

The TOP221P belongs to the TOPSwitch-II series by Power Integrations. This family integrates the power switch and controller to reduce component count and design complexity compared to discrete solutions. It is designed for cost-effective, reliable power supply implementations in consumer and industrial electronics.

AC DC Converters, Offline Switchers Replacement Considerations

TOP221PN

AC DC Converters, Offline Switchers FAQ

What is the maximum breakdown voltage of the internal MOSFET?

The internal power MOSFET has a breakdown voltage of 700 V.

Does the TOP221P include thermal protection?

Yes, it includes an internal thermal shutdown circuit to protect against overheating.