750813550

Switching Converter, SMPS Transformers Overview

The Würth Elektronik 750813550 is an offline flyback transformer designed for board mounting in switch-mode power supply applications. It features a dual primary winding rated for 120 to 191 VAC input and a single secondary output of 12.5 V at 80 mA. The component provides 3000 Vrms isolation between windings and has an inductance of 1.02 mH measured at 10 kHz. It supports AC/DC SMPS topologies using the TI LM3450 controller, offering a power rating suitable for low-power offline conversion tasks.

Switching Converter, SMPS Transformers Feature Summary

• Designed specifically for use with Texas Instruments LM3450 LED driver controllers
• Provides high-voltage isolation of 3000 Vrms between primary and secondary circuits
• Features dual primary windings to accommodate wide input voltage ranges
• Optimized for offline flyback converter topologies

Switching Converter, SMPS Transformers Applications

• Offline AC/DC switch-mode power supplies
• LED driver circuits utilizing TI LM3450 controllers
• Low-power isolated power conversion systems

Switching Converter, SMPS Transformers Procurement Notes

Verify the specific datasheet version and RoHS compliance status directly from Wurth Elektronik before procurement. Confirm that the 12.5V @ 80mA output specification aligns with your load requirements. Ensure the 3000 Vrms isolation rating meets safety standards for your target market. Cross-reference the pinout with the LM3450 application circuit to guarantee correct board layout integration.

Switching Converter, SMPS Transformers Selection Notes

Select this component when designing offline flyback converters requiring galvanic isolation and compatibility with the TI LM3450 controller. It is suitable for applications needing a 12.5V output at moderate current levels. Consider the 1.02 mH inductance value for your energy storage calculations. Verify that the physical dimensions and SMD package fit within your PCB footprint constraints.

Switching Converter, SMPS Transformers Part Context

This part belongs to the Wurth Elektronik MID-OLTI series, which are transformers pre-matched for specific controller ICs. Unlike general-purpose transformers, these units are optimized for particular switching frequencies and control architectures. This specific model targets the LM3450 platform, simplifying design validation by ensuring magnetic parameters match the controller's operational requirements.

Switching Converter, SMPS Transformers Replacement Considerations

No direct public substitute part numbers are confirmed for this specific LM3450-matched transformer. General offline flyback transformers may replace it only if electrical parameters and isolation ratings are identical, but controller-specific optimization will be lost.