TOP233G

AC DC Converters, Offline Switchers Overview

The TOP233G is an offline switcher from the TOPSwitch-FX family, integrating a high-voltage power MOSFET with control and protection circuits in an 8-SMD package. It operates as a flyback converter with a switching frequency range of 66 kHz to 132 kHz. The device supports a maximum duty cycle of 78% and includes internal current limiting, over-temperature, and over-voltage fault protections. It functions within an operating temperature range of -40°C to +150°C TJ.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a high-voltage power MOSFET with control logic and protection circuits on a single chip
• Provides comprehensive fault protection including current limiting, over-temperature, and over-voltage shutdown
• Features frequency jittering for reduced electromagnetic interference

AC DC Converters, Offline Switchers Applications

• Offline flyback power supplies
• General purpose AC/DC conversion
• Battery chargers and adapters

AC DC Converters, Offline Switchers Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels due to obsolete status. Confirm lot codes and marking consistency with official datasheets. Request full traceability documentation. Ensure storage conditions meet humidity sensitivity requirements prior to assembly. Validate supplier credentials against Power Integrations authorized partner lists.

AC DC Converters, Offline Switchers Selection Notes

Evaluate thermal management requirements given the wide operating temperature range. Consider the fixed switching frequency characteristics for EMI filter design. Assess system isolation voltage needs against the integrated MOSFET breakdown rating. Review pinout compatibility if replacing legacy designs. Verify footprint dimensions match the specified SMD-8B package.

AC DC Converters, Offline Switchers Part Context

The TOP233G belongs to the TOPSwitch-FX series, designed for cost-effective, high-reliability power supply applications. This family integrates the controller, oscillator, high-voltage switched MOSFET, and protection circuitry into a single monolithic IC. The FX series emphasizes improved efficiency and robustness compared to earlier generations.

AC DC Converters, Offline Switchers Replacement Considerations

TOP233GN is a documented variant within the same product line.