MP6900DJ-LF-Z

Power Supply Controllers, Monitors Overview

The MP6900DJ-LF-Z is a low-drop fast turn-off intelligent controller designed for flyback converters. It replaces Schottky diodes by regulating external switch forward voltage drop to approximately 70mV and immediately turning off the switch when voltage becomes negative. Operating with an input voltage range of 8V to 24V, it supports DCM, CCM, and quasi-resonant topologies. The device features a total fast turn-off delay of 20ns and a maximum switching frequency of 400kHz. It is housed in a TSOT-23-5 package.

Power Supply Controllers, Monitors Feature Summary

• Replaces Schottky diodes in high-efficiency flyback converters using external switches
• Provides rapid turn-off capability with a total delay of 20ns
• Regulates external MOSFET forward voltage drop to approximately 70mV
• Supports standard 12V and 5V logic level MOSFETs

Power Supply Controllers, Monitors Applications

• Flyback power supplies requiring high efficiency
• Quasi-resonant converter designs
• DCM and CCM flyback applications
• Secondary side synchronous rectification

Power Supply Controllers, Monitors Procurement Notes

Verify component authenticity through authorized MPS distributors or certified suppliers. Confirm the part number matches MP6900DJ-LF-Z exactly. Check datasheet revisions for any updates. Ensure storage conditions comply with manufacturer guidelines. Validate RoHS compliance status before integration into production.

Power Supply Controllers, Monitors Selection Notes

Select this component for flyback topologies needing reduced conduction losses compared to diodes. It requires an external N-channel MOSFET. Ensure the chosen MOSFET aligns with the 8V to 24V input range. Consider thermal management as the device regulates current through the external switch. Verify compatibility with control IC driving the gate.

Power Supply Controllers, Monitors Part Context

This part belongs to the MP6900 series of intelligent rectifiers from Monolithic Power Systems. It is specifically engineered for secondary-side rectification in isolated power supplies. The series aims to improve overall system efficiency by minimizing reverse recovery losses associated with traditional diode rectification methods.

Power Supply Controllers, Monitors Replacement Considerations

For new designs, consider the MP6902 as an alternative. The MP6900 is noted as not recommended for new designs but remains in production for existing customers.