750812340

Switching Converter, SMPS Transformers Overview

The Würth Elektronik part number 750812340 is a board-mount power transformer designed for offline applications, specifically compatible with the Texas Instruments LM3450 controller. It features an inductance of 200µH with a tolerance of ±10%, measured at 10kHz. The device includes a primary winding with a maximum DC resistance of 0.130 ohms at 20°C. An auxiliary supply output provides 12.5V at 5mA. This component serves as a critical magnetic element in switch-mode power supply designs requiring isolated feedback and auxiliary power generation.

Switching Converter, SMPS Transformers Feature Summary

• Designed for compatibility with TI LM3450 offline controller architectures
• Provides auxiliary power output for control circuitry
• Board-mount construction for integrated power supply assemblies

Switching Converter, SMPS Transformers Applications

• Offline flyback converter designs using LM3450 controllers
• Power supplies requiring auxiliary winding for bias voltage
• Industrial equipment switching power modules

Switching Converter, SMPS Transformers Procurement Notes

Verify the specific datasheet version and electrical tolerances against your design requirements before procurement. Confirm that the auxiliary output specifications meet the load demands of your controller IC. Ensure the physical footprint and pinout match your PCB layout constraints to avoid integration issues during assembly.

Switching Converter, SMPS Transformers Selection Notes

Select this transformer when utilizing the Texas Instruments LM3450 controller for offline power conversion. The fixed inductance and auxiliary winding configuration are optimized for this specific application. Consider thermal performance and isolation ratings if operating in high-temperature environments or requiring enhanced safety compliance.

Switching Converter, SMPS Transformers Part Context

This component belongs to Würth Elektronik's WE-UNIT series of transformers. These units are engineered for specific controller families to simplify power supply design. The 750812340 variant is tailored for offline topologies, providing necessary magnetics for energy storage and auxiliary power in a compact board-mount package.

Switching Converter, SMPS Transformers Replacement Considerations

No direct public substitute part numbers are confirmed for this specific transformer configuration. Alternative solutions require custom magnetics design or selection of different controller-compatible transformers from other manufacturers, ensuring identical inductance and auxiliary output specifications.