MP6908AGJ-Z

Power Supply Controllers, Monitors Overview

The MP6908AGJ-Z is a synchronous rectifier controller from Monolithic Power Systems designed for flyback converters. It operates within a supply voltage range of 4 V to 13 V and supports switching frequencies up to 400 kHz. The device features a maximum duty cycle of 50% and is rated for an output voltage of 12 V with a current capacity of 3 A. It functions across an extended temperature range from -40°C to +125°C and utilizes a TSOT23-6 surface-mount package.

Power Supply Controllers, Monitors Feature Summary

• Intelligent fast turn-off control that regulates external SR MOSFET conduction drop to approximately 40mV while preventing false triggering during voltage oscillations in discontinuous or quasi-resonant modes.
• Eliminates the need for auxiliary windings by supporting both high-side and low-side rectification configurations directly on the secondary side.
• Generates its own power supply voltage internally, enabling operation in applications with potentially low output voltages such as battery chargers.

Power Supply Controllers, Monitors Applications

• Flyback power supplies
• Battery charging systems
• AC-DC adapters

Power Supply Controllers, Monitors Procurement Notes

Verify the specific suffix AGJ against the manufacturer's official datasheet to confirm the exact package variant and tape-and-reel specifications. Ensure compatibility with the target flyback topology and input voltage constraints before finalizing procurement orders.

Power Supply Controllers, Monitors Selection Notes

Select this component for designs requiring efficient secondary-side rectification without auxiliary winding complexity. It is suitable for standard and logic-level SR MOSFETs in CCM, DCM, and quasi-resonant topologies where minimizing conduction losses is critical.

Power Supply Controllers, Monitors Part Context

This part belongs to the MP6908A series of intelligent rectifiers. It serves as a direct replacement for Schottky diodes in high-efficiency flyback converters, offering superior performance by actively controlling the synchronous rectifier MOSFET to reduce thermal dissipation.

Power Supply Controllers, Monitors Replacement Considerations

LP35119A is documented as a pin-to-pin compatible alternative. Verify T-pin handling requirements when substituting, as functional differences may exist despite physical compatibility.

Power Supply Controllers, Monitors FAQ

Does the MP6908AGJ-Z require an auxiliary winding for operation?

No, it supports both high-side and low-side rectification without the need for an auxiliary winding.

What operating modes does the MP6908AGJ-Z support?

It supports Discontinuous Conduction Mode (DCM), Continuous Conduction Mode (CCM), and quasi-resonant operation.