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Synchronous rectification

Synchronous rectifier MOSFET controller, used to control the external MOSFET, replacing the rectifier diode in the flyback converter, can significantly reduce heat and improve the conversion efficiency of the system. The IC determines its switching state by detecting the source-drain voltage of the external MOSFET.


MST1692FS-C:Integrated 22mΩ 40V MOSFETs, reflective and quasi-resonant synchronous rectifiers

The  MST1692FS-C  is a synchronous  rectifier  diode  with 40V voltage resistance and 22mΩ internal resistance MOSFETs. It is used

to replace  the  rectifier  diode of  flyback  converters, which can  significantly  reduce  heat and improve the  conversion  efficiency

of the system. The IC determines its switching state by detecting the source-drain voltage of the integrated MOSFET.

The MST1692FS-C is compatible with flyback converters in discontinuous or quasi-resonant operating modes.

■ Compatible with DCM and QR flyback converters

■ A 22mΩ 40V MOSFET is integrated

■ supports a maximum 100kHz switching frequency

■ Available in an SOP8 package


MST1694KC-BIntegrated 13mΩ 60V MOSFET, high voltage synchronous rectifier diode

The MST1694KC-B is a fast switch-off intelligent rectifier for flyback converters with integrated 100V MOSFETs.

It can provide higher efficiency than  diode  rectifiers. The forward  voltage drop of the internal  switch tube  can be  adjusted  to

40mV and the switch tube can be turned off before the drain-source voltage is reversed.

It is suitable for applications in discontinuous conduction mode (DCM), quasi-resonant mode  (QR)  and  continuous  conduction 

mode (CCM).

The MST1694KC-B is packaged in SOP-8.

■ Compatible with DCM, CCM and QR flyback converters

■ The output voltage is directly supplied to VCC

■ The output voltage is directly supplied to VCC

■ 150uA Low static current

■ 4.5A drive current Ensures quick MOSFET shutdown

■ Maximum voltage 100V

■ supports a maximum switching frequency of 200kHz

■ Supports low output voltage operation

■ Available in an SOP8 package



MST1694KC-A:Integrated 17mΩ 100V MOSFET, high voltage synchronous rectifier diode

The MST1694KC-A is a fast switch-off intelligent rectifier for flyback converters with integrated 100V MOSFETs.

It can provide higher efficiency than  diode  rectifiers. The forward  voltage drop of the internal  switch tube  can  be  adjusted  to

40mV and the switch tube can be turned off before the drain-source voltage is reversed.

It is suitable for applications in discontinuous conduction mode (DCM), quasi-resonant  mode  (QR)  and  continuous  conduction

mode (CCM).

The MST1694KC-A is packaged in SOP-8.

■ Compatible with DCM, CCM and QR flyback converters

■ The output voltage is directly supplied to VCC

■ The output voltage is directly supplied to VCC

■ 150uA Low static current

■ 4.5A drive current Ensures quick MOSFET shutdown

■ Maximum voltage 100V

■ supports a maximum switching frequency of 200kHz

■ Supports low output voltage operation

■ Available in an SOP8 package



MST1693TG:External MOS, high voltage synchronous rectifier controller

The MST1693TG is a synchronous rectifier MOSFET controller used to control the  external  MOSFET, replacing  the  rectifier  diode in

the flyback converter, which can significantly reduce heat and improve the conversion efficiency  of  the  system.The IC determines 

its switching state by detecting the source-drain voltage of the external MOSFET.

The MST1693TG is compatible with flyback converters in continuous mode, discontinuous mode and quasi-resonant operating mode.

■ Compatible with DCM, CCM and QR flyback converters

■ The output voltage is directly supplied to VCC

■ 150uA Low static current

■ 4.5A drive current Ensures quick MOSFET shutdown

■ supports a maximum switching frequency of 200kHz

■ Supports low output voltage operation

■ Available in an SOT23-6 package


Related products

Classification Product model Product description
Synchronous rectification MST1692FS-C
Synchronous rectification MST1694KC-A
Synchronous rectification MST1694KC-B
Synchronous rectification MST1693TG