TOP234G

AC DC Converters, Offline Switchers Overview

The TOP234G is a high-voltage integrated switch from the TinySwitch-II family, combining a 700 V power MOSFET with a current-mode controller in a single package. It supports off-line flyback converter designs for universal input voltages. Key electrical parameters include a maximum switching frequency of 132 kHz and an operating temperature range from -40 °C to +150 °C. The device features programmable line regulation and cycle-by-cycle current limiting.

AC DC Converters, Offline Switchers Feature Summary

• Integrates a 700 V power MOSFET with a current-mode controller for simplified design
• Includes built-in high-voltage switched current source for startup operation
• Features programmable line regulation and cycle-by-cycle current limiting
• Offers thermal shutdown protection and auto-restart capability during faults

AC DC Converters, Offline Switchers Applications

• LCD monitors
• Personal computers
• Small servers
• Laptop adapters
• Set-top boxes

AC DC Converters, Offline Switchers Procurement Notes

Verify the specific suffix (e.g., G) against the manufacturer's datasheet to confirm pinout and packaging details. Ensure the component meets RoHS compliance requirements if applicable to your region. Cross-reference the ordering code with authorized distributors to avoid counterfeit parts. Confirm that the TO-220G package is suitable for your thermal management strategy.

AC DC Converters, Offline Switchers Selection Notes

Select the TOP234G for applications requiring moderate power levels within the TinySwitch-II range. Consider its fixed frequency operation and internal startup circuitry for cost-sensitive designs. Evaluate the thermal performance of the TO-220G package against your enclosure constraints. Compare it with newer families like TinySwitch-III or IV if higher efficiency or wider input ranges are needed.

AC DC Converters, Offline Switchers Part Context

The TOP234G belongs to the TinySwitch-II family, which integrates a high-voltage MOSFET and control circuitry into a single monolithic chip. This family is designed for low-cost, high-reliability off-line power supplies. It represents an evolution from earlier TinySwitch models with improved integration and feature sets for universal input applications.

AC DC Converters, Offline Switchers Replacement Considerations

TOP234YN is a direct replacement within the same family. Verify pin compatibility and thermal characteristics when substituting. Newer generations like TinySwitch-III may offer enhanced efficiency but require schematic review.