LT3748MPMS#TRPBF

Overview

The LT3748MPMS#TRPBF is a switching regulator controller designed for isolated flyback topologies, capable of high power applications. It operates with an input voltage range from 5V to 100V and features an operating supply current of 1.3mA. The device utilizes boundary mode control to optimize magnetic component size while maintaining load regulation. It drives an external low-side N-channel MOSFET using an internally regulated 7V supply, eliminating the need for opto-isolators or tertiary windings for primary-side sensing.

Feature Summary

• Primary-side sensing capability eliminates the requirement for opto-isolators or tertiary transformer windings for output regulation.
• Boundary mode operation enables reduced magnetic component size without compromising load regulation performance.
• Integrated 7V internal supply directly drives external low-side N-channel power MOSFETs.
• Supports high input voltages up to 100V for versatile isolated power conversion designs.

Applications

• High-power isolated flyback power supplies
• Industrial power conversion systems requiring galvanic isolation
• Medical equipment power stages
• Telecommunications infrastructure power modules

Procurement Notes

Verify the specific suffix TRPBF indicates tape-and-reel packaging when ordering. Confirm that the MPMS designation corresponds to military-grade temperature ranges if required by your application specifications. Cross-reference the exact part number with Analog Devices documentation to ensure compatibility with your design requirements before procurement.

Selection Notes

Select this component for designs requiring high-voltage isolation and simplified feedback loops via primary-side regulation. Ensure the external MOSFET selection matches the gate drive capabilities and voltage ratings specified in the datasheet. Evaluate thermal management needs as the controller supports high-power outputs, and verify that the transformer magnetizing inductance aligns with the boundary mode frequency characteristics.

Part Context

This part belongs to the LT3748 family of isolated flyback controllers manufactured by Analog Devices Inc. The series is engineered for efficient power conversion in applications demanding high input voltages and reliable isolation. The MSOP-16 package provides a compact solution for space-constrained designs while maintaining robust electrical performance standards.

Replacement Considerations

Consult official Analog Devices substitution guides for verified alternatives. Generic flyback controllers may not support primary-side sensing or boundary mode operation, potentially requiring circuit redesign.