750370042

Switching Converter, SMPS Transformers Overview

The Würth Elektronik 750370042 is a surface-mount flyback transformer designed for DC/DC converter applications, specifically optimized for the LT3573, LT3574, LT3575, and LT3748 chipsets. It features a single primary winding and dual secondary windings with a turns ratio of 1:1:1:1. The component provides 1500Vrms isolation and operates within a temperature range of -40°C to +125°C. Key electrical parameters include a primary voltage rating of 5V, auxiliary voltage of 5V @ 20mA, and an inductance of 15µH at 100kHz. The power rating is 1W, with secondary current ratings of 100mA each. Dimensions are 12.95mm x 10.41mm x 6.02mm.

Switching Converter, SMPS Transformers Feature Summary

• Optimized for Linear Technology LT357x series switching regulators
• Provides high-voltage isolation for safety compliance
• Dual secondary outputs for multi-rail requirements
• RoHS compliant and lead-free construction

Switching Converter, SMPS Transformers Applications

• Flyback converter circuits using LT3573/LT3574/LT3575 controllers
• Isolated DC/DC power supply modules
• Industrial control systems requiring galvanic isolation
• Embedded power solutions with strict size constraints

Switching Converter, SMPS Transformers Procurement Notes

Verify the specific ordering suffix to ensure correct packaging configuration, such as tape and reel or cut tape, as availability may vary by distributor. Confirm that the target application aligns with the specified LT357x chipset compatibility. Check for recent Product Change Notifications (PCN) regarding labeling or manufacturing site updates. Ensure storage conditions respect the moisture sensitivity level (MSL 1) if the package seal has been compromised prior to use.

Switching Converter, SMPS Transformers Selection Notes

Select this component when designing isolated power stages for Linear Technology's LT357x family of converters. The 15µH inductance and 1W power rating suit low-power isolated applications. The dual secondary winding configuration allows for generating multiple output voltages simultaneously. Ensure the PCB footprint matches the 12.95mm x 10.41mm SMD package dimensions. Consider the 1500Vrms isolation barrier for safety standards compliance in the final system design.

Switching Converter, SMPS Transformers Part Context

This part belongs to the Würth Elektronik WE-FB series of flyback transformers. These components are engineered specifically to complement popular switching regulator ICs, simplifying the design process for isolated power supplies. The WE-FB series emphasizes compact form factors and high reliability for industrial and commercial electronics.

Switching Converter, SMPS Transformers Replacement Considerations

Direct substitutes within the same WE-FB series for LT357x applications include part numbers like 750370040, which offers different electrical characteristics (30µH, 5W). Verify pinout compatibility and electrical ratings before substituting.