TOP244G

AC DC Converters, Offline Switchers Overview

The TOP244G is a high-voltage integrated circuit from the TOPSwitch-GX family, designed for offline flyback power supplies. It integrates a 700 V power MOSFET with a current-mode controller, oscillator, high-voltage switched current source, thermal shutdown, and other control logic. The device operates at a switching frequency of 132 kHz and supports an input voltage range of 85 to 265 VAC. It provides up to 20 W of output power at 230 VAC and features a DIP-8 package for through-hole mounting.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with a current-mode controller and protection circuits
• Includes programmable line sensing and current limit pins for flexible design
• Features frequency jitter to reduce electromagnetic interference (EMI)
• Provides hysteretic thermal shutdown and remote ON/OFF capability

AC DC Converters, Offline Switchers Applications

• LCD monitors
• Personal computers
• Small servers
• Set-top boxes
• Digital TVs

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix against the official datasheet to confirm pinout compatibility and electrical ratings. Ensure the component meets RoHS compliance requirements for your target market. Confirm that the DIP-8 package aligns with your PCB assembly capabilities and thermal management strategy before finalizing procurement.

AC DC Converters, Offline Switchers Selection Notes

Select this component for designs requiring a compact, high-voltage integrated solution for low-to-medium power applications. Consider the 132 kHz switching frequency for balancing efficiency and EMI performance. Evaluate the need for external programming of current limits and line sensing to optimize transformer design and cost.

AC DC Converters, Offline Switchers Part Context

The TOP244G belongs to the TOPSwitch-GX family, which offers extended power ranges and enhanced features compared to previous generations. This series is designed to simplify power supply design by integrating multiple functions into a single package, reducing component count and board space while maintaining high reliability and efficiency standards.

AC DC Converters, Offline Switchers Replacement Considerations

Check for direct replacements within the TOPSwitch-GX family, such as the TOP244PN or TOP244YN, depending on the required package type (DIP vs. TO-220) and power rating. Verify that any substitute part maintains the same 700 V breakdown voltage and switching frequency characteristics.