DRV2700EVM-HV500: Unable to generate the Sine, Triangle and Impulse wave using DRV2700 console for DRV2700EVM-HV500

Tejendra Raju

Tool/software:

Hi,

I'm trying to run the piezo load of 4.5nf using DRV2700EVM-HV500 evaluation board, the output is almost DC wave as shown below never the desired signal

Requesting support on how to resolve this

Piezo console for triangle

Measured value from the scope

Piezo console for sine

Measured value from the scope

Piezo console for pulse

Measured value from the scope

5 months ago

0 Kelly Griffin 5 months ago

TI__Genius 11152 points

Hi,

Do you have JP1 connected? Can you measure the PWM signal anywhere along the signal path, like on JP1 or TP1?

0 Tejendra Raju 5 months ago in reply to Kelly Griffin

Prodigy 10 points

Hi Kelly,

The JP1 is connected, the board is in its default settings, measured across the TP1 there is no signal

0 Tejendra Raju 5 months ago in reply to Tejendra Raju

Prodigy 10 points

Additional information added here

across tp1

across output

Tested for AC mode, getting square wave

across tp1

across output

Dc mode

across TP1

across output

0 Kelly Griffin 5 months ago in reply to Tejendra Raju

TI__Genius 11152 points

Hi,

So now you see a signal on TP1 with the PWM output, but not the waveform generator?
It looks like the PWM input at 10Hz is correct on TP1 and the output.. if you see the signal on TP1 and the JP1 is connected, then the output should be reflected.

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DRV2700EVM-HV500: Unable to generate the Sine, Triangle and Impulse wave using DRV2700 console for DRV2700EVM-HV500