TOP245F

AC DC Converters, Offline Switchers Overview

The TOP245F is an integrated off-line switcher belonging to the TOPSwitch-GX family manufactured by Power Integrations. It combines a high voltage power MOSFET, PWM control circuitry, and fault protection on a single CMOS chip. The device operates with an AC supply range of 85 to 265 VAC. It utilizes voltage-mode control and pulse width modulation techniques. The component is housed in a TO-262 package (ZIP) featuring six terminals. It supports an operating temperature range from -40 °C to 125 °C.

AC DC Converters, Offline Switchers Feature Summary

• Fully integrated soft-start capability for minimum stress and overshoot
• Externally programmable accurate current limit
• Separate line sense and current limit pins available on specific packages
• Line under-voltage detection prevents turn-off glitches

AC DC Converters, Offline Switchers Applications

• Low cost universal input offline converters
• High efficiency battery chargers
• General purpose power supplies
• Offline flyback converters

AC DC Converters, Offline Switchers Procurement Notes

Verify the exact ordering suffix against official manufacturer documentation to confirm pinout configuration and lead-free status. Ensure the selected variant matches the required thermal performance and regulatory compliance standards for your specific application design.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring extended power ranges and high flexibility. Consider the availability of separate line sense pins if precise current limiting and line feed-forward are necessary. Evaluate thermal requirements based on the chosen package type and expected load conditions.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-GX family, which offers lower system costs and high design flexibility compared to previous generations. The series supports applications up to 34 W without heatsinks in certain packages. It integrates features that eliminate or reduce the need for external components, simplifying the overall power supply architecture.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official substitution guides for verified alternatives within the same family. Cross-referencing with other TOPSwitch-GX variants may provide compatible solutions depending on specific power and packaging requirements.