How to work phase cut two mosfet dimmer? I need current flow direction, waveforms .Please answering the question or suggest the study material where I will get.?

 

The first thing that You will need is a completely isolated FET-Driver.
This will not work for high-frequencies.
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Thank you
Ok fine.. but I want to know the how two mosfet will work.

 

When the Gate-Voltage is generated by the "Photovoltaic" FET-Driver
both FETs will turn On simultaneously.

Then You need to Power the LED with standard Phase-Chopper Circuitry,
similar to that used with a Triac-Lamp-Dimmer, or Motor-Speed-Control.

You can also use LOW-FREQUENCY PWM Chopping, ( ~200hz max ).
This is because this type of FET-Driver is very "slow" compared to standard FET-Drivers.
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Thank you so much