LTC3900IS8#TRPBF

Overview

The LTC3900IS8#TRPBF is a secondary-side synchronous rectifier driver designed for isolated forward converters. It features a 2A peak output current and operates on an 8-pin SOIC package. The device accepts pulse transformer inputs from the primary controller to drive N-channel MOSFETs. Key electrical parameters include a supply voltage range of 4V to 15V, quiescent current of 1.5mA, and propagation delay of 75ns. It supports switching frequencies up to 1MHz and includes built-in dead-time control.

Feature Summary

• Integrated dead-time control prevents cross-conduction in synchronous rectification applications
• Direct interface with pulse transformers for galvanic isolation from primary side controllers
• High peak output current capability drives low Rds(on) N-channel MOSFETs efficiently

Applications

• Isolated forward converter power supplies
• Flyback converter synchronous rectification stages
• High-efficiency DC-DC conversion modules requiring tight regulation

Procurement Notes

Verify the specific suffix #TRPBF indicates tape-and-reel packaging when sourcing components. Confirm that the manufacturer Analog Devices Inc. is the sole producer. Ensure compatibility with existing pulse transformer designs before integration into new hardware layouts.

Selection Notes

Select this component for applications requiring high efficiency in isolated topologies where primary-side control is not feasible. Evaluate thermal performance within the SOIC-8 package against expected load currents. Ensure the input signal timing aligns with the transformer coupling characteristics to maintain stable operation across temperature ranges.

Part Context

This part belongs to the LTC3900 series of gate drivers specialized for secondary-side rectification. It complements primary-side PWM controllers by providing precise timing and drive strength for external MOSFETs, enhancing overall system efficiency compared to diode-based rectification methods.

Replacement Considerations

LTC3900IS8#PBF serves as a tube-packaged alternative with identical electrical specifications.