TOP234Y

AC DC Converters, Offline Switchers Overview

The TOP234Y is a high-voltage power MOSFET and PWM controller integrated into a single CMOS chip, belonging to the TOPSwitch-FX family. It operates with a switching frequency of 100 kHz and supports an input voltage range of 85 VAC to 265 VAC. The device features a maximum duty cycle of 67% and includes line under-voltage detection and line overvoltage shutdown capabilities. It offers externally settable accurate current limit and frequency jittering for EMI reduction. The component is housed in a TO-220-3 package and is designed for offline switcher applications.

AC DC Converters, Offline Switchers Feature Summary

• Fully integrated soft-start functionality minimizes stress and output overshoot during startup.
• Externally settable accurate current limit provides precise control over power delivery.
• Line feed forward with maximum duty cycle reduction rejects ripple and limits DCMAX at high line voltages.
• Frequency jittering reduces electromagnetic interference and lowers EMI filtering costs.

AC DC Converters, Offline Switchers Applications

• Offline switchers
• Universal input AC/DC converters
• Battery chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific datasheet version and ordering suffix to ensure compatibility with the required package type and pin configuration. Confirm that the selected variant meets all necessary regulatory standards for the target market. Check for any design-in restrictions or recommended companion components specified by the manufacturer.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring high integration and reduced external component count. Consider its suitability for applications needing wide input voltage ranges and robust protection features. Evaluate thermal management requirements based on the expected load and ambient temperature conditions.

AC DC Converters, Offline Switchers Part Context

The TOP234Y is part of the TOPSwitch-FX series from Power Integrations, which combines a high-voltage power MOSFET with advanced PWM control circuitry. This family is known for reducing system cost and improving design flexibility through extensive integration of fault protection and control functions onto a single chip.

AC DC Converters, Offline Switchers Replacement Considerations

Consult official cross-reference lists for verified substitutes. Ensure any replacement matches the electrical specifications, pinout, and thermal characteristics of the original component.