How to power on EVM430-F6736 meter by using AC power supply

Hi,

Have you checked all of your jumper configurations per table 1 on p. 17 of www.ti.com/lit/pdf/slaa517 ? It looks like JP4 needs to be set to VCC_PL to use the on board power supply from the cap circuitry.

Also is this a fresh EVM you just received, where you know that the device is programmed already with the correct code?

Regards,

Katie

Hi Katie, 

I have followed the documentation as given in slaa517 and set the JP4 to VCC_PL. But still it didn't powered on.

Yes, it is a fresh EVM, But in documentation on p.20 it is given that calibration is necessary in the section 6 Results and Calibration.

Can you suggest how to check? 

Howdy Allu,

The proper configuration to use the onboard cap drop power supply is to have the DVCC jumper set to VCC_PL, and apply 220VAC to the voltage input.  The EVM comes programmed out of the box with some rough calibration values.  At a minimum you should see the LCD turn on and start cycling through various metrology values.

It is important to note that the EVM has separate voltage and current inputs.  The voltage inputs are the screw terminals on the top left side of the terminal block (you should be able to see two wires connecting them if you peak under the PCB).  Can you verify for me that this is where you are connecting your voltage source?

Can you also describe your voltage source for me?  This will help in tracking down any potential issues with your test setup.

Regards

Hi Bart, 

I have used DVCC jumper set to VCC_PL and applied 220V AC to voltage source input as per specified screws mentioned figure 13 of slaa517 document (V+ :  Phase and V-: neutral). But LCD didn't turned on.

We have a test stand from there we are giving voltage source supply.

we have two jumpers available in the EVM, one we are connecting to DVCC and for another one shall we  need to connect some specified place or any where it can be connected or we need to remove it.

while our testing, the second jumper was connected in AUX3. it that ok. 

Allu,

It sounds like you have the board setup and under power correctly.  Are you able to verify 3.3V with a multimeter via the DGND and DVCC headers at the top of the board?

If you are getting the proper voltage on the board, then the next step would indeed be to reprogram it with a FET tool.  The software is available with the application note that you have already been referencing.

Bart,

There is no voltage difference in DGND and DVCC when AC voltage is applied.

What can be done? What about second jumper connection? what is the use JP5 and JP6.

But we are getting Voltage difference when we are connecting through FET tool.

saikrishna allu said:

What can be done?

You can trace the schematic and board connections with your meter to see where you are missing the connection that ultimately supplies the MSP circuitry.

Start at the AC input (observing relevant safety precautions) and check all the downstream points.

Allu,

JP5 and JP6 are used to configure the wireless expansion headers, and don't have any bearing on the power path.  The DVCC select jumper should be sufficient to power the board off of an AC input.  You AC signal does need to be able to provide at least a few VA to power the board.  Is y our tester capable, or does it provide purely a voltage signal with no current behind it?

Bart,

Our tester is capable of providing both voltage and current for voltage source. However,  we have provided purely voltage supply with no current.

if at all current is also required, what is range we need to provide?

can you tell what is the range of VA also?