78253/55JVC-R

Overview

The Murata 78253/55JVC-R is a surface-mount power transformer designed for use with the MAX253 controller. It features an inductance of 240 µH and supports a 5V input to 5V output configuration with a 200 mA secondary current rating. The component provides 4000 VDC isolation and operates at frequencies up to 500 kHz. Its physical dimensions are 9.00 mm x 9.52 mm with a maximum height of 6.35 mm.

Feature Summary

• Provides galvanic isolation between primary and secondary circuits
• Optimized magnetic coupling for MAX253 controller operation
• Supports high-frequency switching applications

Applications

• Compact isolated DC-DC converter designs
• Power supplies utilizing MAX253 controllers
• Board-mounted isolation stages

Procurement Notes

Verify the specific suffix 'JVC' against design requirements, as variations like 'JC' or 'MC' exist within the series. Confirm that the 240 µH inductance aligns with the target circuit specifications. Ensure compatibility with the MAX253 driver IC. Check RoHS3 compliance status for regulatory adherence.

Selection Notes

Select this component when a 240 µH inductance is required for MAX253-based topologies. Compare against the 78253/55JC-R (830 µH) if higher inductance is needed. Consider the 78253/55MC if through-hole mounting is preferred. Verify voltage ratings and package dimensions fit the PCB layout constraints.

Part Context

This part belongs to the 78253J series of specialized transformers from Murata Power Solutions. These components are engineered specifically for integration with Maxim Integrated MAX253 charge pump controllers. The series offers various inductance values and mounting options to support different power conversion architectures.

Replacement Considerations

The 78253/55JC-R is a surface-mount alternative with 830 µH inductance. The 78253/55MC is a through-hole variant. Substitution requires verification of inductance differences and pinout compatibility with the MAX253 controller.