Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Highlighted
Beginner
205 Views

EN63A0 remote sense

Hello,

Is it possible to create a remote sense function using EN63A0 (perhaps by connecting feedback at the load)?

Regards

 

0 Kudos
11 Replies
Highlighted
186 Views

Hello MBaqu,

Yes, you can implement the remote sensing using EN63A0 or any other Enpirion's regulator as shown below.

  1. The Ca branch and the Vsense pin must be connected at the last default output capacitor (Cout)
  2. Connect Ra branch at the load point to compensate for the voltage drop across the PCB
    • Make sure Ra placement is near to EN63A0 not near to the load side to avoid having a long trace for VFB pin (where it is so sensitive to the noise).

Capture.PNG

Thanks,

Mostafa

 

0 Kudos
Highlighted
Beginner
160 Views

Hello Mostafa,

1/ For the Vsense pin, we don't use it because we don't need the prebias feature, is it a problem?

2/ By connecting the Ra branch at the load point, how can I avoid any stability issue? Perhaps, using your stability tool anf adding trace RES and trace IND is sufficient but what about the parasitic capacitor of the trace?

Thanks

0 Kudos
Highlighted
153 Views

Hello MBaqu,

No need to connect the VSENSE in your case since you don't use the pre-bias feature.

I only include that in my recommendation to make it general answer for any of Enpirion regulators.

 

Regarding the stability concern, based on the analysis that we did there is no worries in that connection where the control loop will not be effected.

Unfortunately the stability tool is not suitable for that analysis even if it shows that your system is stable where it always has Ra and Ca branches connected together at the same point and you can't separate them.

So i have attached EN63A0 LTSPICE (free spice tool from Analog devices, please click here to download) which will help you to do that analysis in time domain.

 

Thanks,

Mostafa

 

 

0 Kudos
Highlighted
Beginner
150 Views

Hello Mostafa,

Thanks, I'll make analisys based on simulation but is it possible to have a Pspice model because we are used to Pspice from Cadence and encrypted model from LTspice are not compatible.

Regard

0 Kudos
Highlighted
144 Views

Hello MBaqu,

Sure, attached please find the pspice model of EN63A0 with a test example circuit.

Thanks,

Mostafa

 

 

0 Kudos
Highlighted
Beginner
137 Views

Thanks a lot Mustafa,

Can I ask you the same model for the EN6337?

Regards

 

0 Kudos
Highlighted
132 Views

Hello MBaqu,

Attached please find the pspice model of EN6337.

Thanks,

Mostafa

0 Kudos
Highlighted
Beginner
51 Views

Hello Mostafa,

I have some issue running simulation with EN63A0. Running your test schematic, result are like image below :

MBaqu_0-1605869172283.png

If I replace input and output capacitors by ideal one (i.e. without ESL and ESR), simulation doesn't converge.

 

Could you help me please?

Final goal is to make stability simulation with long feedback track.

Thanks

 

0 Kudos
Highlighted
38 Views

Hello MBaqu,

We don't recommend to use the ideal values but if you are facing Ltspice converge issue please adjust your LTSPICE setting as shown below.

Mostafa_Intel_AE_0-1605932678554.png

 

Regarding the stability simulation, i have updated the circuit to add AC analysis and the simulation result as below. you can adjust the circuit based on your actual component values

Mostafa_Intel_AE_1-1605932755921.png

Attached also is the simulation circuit with all the log and raw files, so you can have all same resulting and results as mine.

Thanks,

Mostafa

0 Kudos
Highlighted
Beginner
30 Views

Hello Mostafa,

My issue is related to the Spice model used with Pspice from Cadence not LTSpice.

We are familiar with Pspice so I prefer use it.

Thanks

 

0 Kudos
Highlighted
Beginner
26 Views

Hello,

 

Another question:

We use 3 EN63A0 in parallel. About the stability, do we need to add all capacitors on the Vout on the simulation or just total number of capacitors divied by 3?

Thanks

0 Kudos