FSL128MRTWDTU

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FSL128MRTWDTU is an offline flyback switcher for high power isolated DC/DC return with high integration and low stand-by losses. This device integrates a controller, gate driver IC, infineon BIPOLAR switch, and one primary side MOSFET in a single package.

Application Field

FSL128MRTWDTU is suitable for various offline AC/DC systems such as:

• Voltage regulation for PC systems
• DC/DC converter for server systems
• DC/DC converter for telecom systems

It also offers system flexibility, efficient thermal performance, and low BOM cost thanks to high integration of components and minimized external components.

Working Principle

FSL128MRTWDTU offline flyback switcher includes a controller, a driver IC and one primary side MOSFET integrated in a single package to simplify the application design. The operation of the FSL128MRTWDTU is based on the boundary conduction mode of the integrated MOSFET.

The FSL128MRTWDTU also incorporates a wide range of protections to guarantee safe operation, such that over-temperature protection, under-voltage lockout, over-voltage protection, over-current protection and overload protection.

The primary side of the FSL128MRTWDTU only consists of a MOSFET and a few external components. The primary-side controller can detect the switch current to control the on time of the switch. It also rectifies the voltage from the auxiliary winding of the transformer to sense the output voltage to regulate the output.

Conclusion

FSL128MRTWDTU can be used in various offline AC/DC systems requiring high power isolated DC/DC return. It offers system flexibility, efficient thermal performance, and low BOM cost thanks to high integration of components and minimized external components. It also incorporates a wide range of protections to guarantee safe operation. The primary-side controller of the FSL128MRTWDTU detects the switch current and rectifies the voltage from the auxiliary winding of the transformer to sense the output voltage and regulate the output.

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