TOP222P

AC DC Converters, Offline Switchers Overview

The TOP222P is a three-terminal off-line PWM switch from the TOPSwitch-II family, integrating a high-voltage MOSFET and control circuitry. It supports flyback, forward, boost, or buck topologies with a switching frequency of 100 kHz. The device operates within an input voltage range of 85 VAC to 265 VAC and delivers up to 90W for universal input applications. Key electrical parameters include a maximum duty cycle of 70%, a quiescent supply current of 1.2 mA, and a breakdown voltage of 700V. It functions reliably in both discontinuous and continuous conduction modes.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with PWM controller, oscillator, and protection logic into a single package.
• Provides system-level protection through latching thermal shutdown and built-in auto-restart current limiting.
• Supports multiple converter topologies including flyback, forward, boost, and buck configurations.
• Features a source-connected tab design to facilitate low EMI implementation and simplified board layout.

AC DC Converters, Offline Switchers Applications

• TV and monitor power supplies
• Audio amplifier power sources
• Set-top boxes and AC adapters
• Smart meters and multimedia speakers

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the DIP-8 package type and pinout configuration match the required schematic. Ensure the specific suffix aligns with the desired tape-and-reel or tube packaging format. Cross-reference the RoHS compliance status with current environmental regulations before finalizing procurement orders.

AC DC Converters, Offline Switchers Selection Notes

Select this component for cost-effective designs requiring minimal external components in power ranges up to 90W. It is suitable for applications prioritizing simplicity and reduced bill-of-materials over ultra-high efficiency requirements. Consider the integrated nature of the device when designing feedback loops, as it supports both primary-side and opto-isolated regulation schemes for flexible implementation.

AC DC Converters, Offline Switchers Part Context

The TOP222P belongs to the second-generation TOPSwitch-II family, which offers enhanced performance and lower costs compared to the first generation. This series extends the power capability of offline converters, making advanced switching technology accessible for mid-range applications. The standard 8L PDIP package option further reduces costs for high-efficiency, lower-power designs while maintaining robust operational characteristics.

AC DC Converters, Offline Switchers Replacement Considerations

TOP242YN is listed as a similar alternative part number from Power Integrations. Verify compatibility regarding pinout, thermal characteristics, and electrical ratings before substitution. Ensure that any replacement maintains the required isolation and protection features for the specific application environment.