TOP233PN

AC DC Converters, Offline Switchers Overview

The TOP233PN is an integrated off-line switcher from the TOPSwitch-FX family, designed for flyback converter applications. It combines a high-voltage power MOSFET with a current-mode controller and protection logic in a single package. The device operates at a switching frequency of 66 kHz to 132 kHz and supports a maximum output power of 25 W. It features a 700 V breakdown voltage and accepts universal AC input voltages ranging from 85 V to 265 V. The unit utilizes pulse width modulation control and includes internal fault protection mechanisms.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with a current-mode controller
• Includes comprehensive fault protection against overcurrent, overvoltage, and overtemperature conditions
• Supports universal AC line input ranges for global compatibility

AC DC Converters, Offline Switchers Applications

• Universal input adapters
• Standby power supplies
• Battery chargers

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix 'PN' corresponds to the 8-PDIP-B package variant. Confirm RoHS compliance status as indicated by the manufacturer's documentation. Ensure the component matches the required thermal characteristics for the intended enclosure design. Cross-reference the ordering part number with the official Power Integrations catalog to avoid packaging discrepancies.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring up to 25 W of isolated DC-DC conversion. The fixed frequency operation simplifies transformer design compared to variable frequency alternatives. Consider the thermal performance within the DIP package when determining heat dissipation requirements. Verify that the 700 V drain-source rating meets the peak voltage stress of the target application topology.

AC DC Converters, Offline Switchers Part Context

This part belongs to the TOPSwitch-FX family, which offers enhanced efficiency and feature sets compared to earlier generations. The family integrates advanced control loops and protection features into a single monolithic chip. This series is widely used in cost-sensitive consumer electronics and industrial power supplies requiring reliable off-line switching capabilities.

AC DC Converters, Offline Switchers Replacement Considerations

TOP253PN is listed as a manufacturer-recommended alternative. TOP243PN is identified as a similar replacement option. Verify pinout compatibility and power ratings before substituting.