Hello ,

I wish to simulate theLtpcie LT 8390 4 switch buck-boost controller in master slave config as shown in the fig ... I wish to control the sch with the help of micro-controller. Is it possible to connect the micro-controller to Fb pin of the model ?

Any suggestions on connections through D/A converter with micro.controller to ltspice

 

Is it possible to connect the micro-controller to Fb pin of the model ?

I see no reason why not, provided neither the micro nor the FB pin gets over-volted in the process.
What control are you trying to achieve by doing this?

 

To control the output voltage , current. The micro-controller will have a CAN (Controller Area Network) which will be providing and taking signals from ECU (load which draws current).

There are few voltage discontinuity tests which I have to perform


And so Micro-controller is necessary in the design.

You meant FB pin can be connected to D/A of micro-controller (provided the voltage is in the range of 3.3-5 V)?

 

I'd include a series resistor between the FB pin and the D/A output. The value would depend on the characteristics of the D/A converter (of which I have no knowledge).

 

digital potentiometer would make it more safer and reliable.