UCD3138: measure the development board Bode diagram which did not join the PID compensator part

zoujiangyilang

Part Number: UCD3138

Hello, I recently learned UCD3138 full bridge circuit development board,

I would like to measure the development board Bode diagram which did not join the PID compensator part 。

I know how to measure the Bode Chart after PID compensation, but I do not know how to measure the Bode plot that does not include the PID compensation part.

how can I measure it ?thank you。

over 8 years ago

0 Peter Meaney over 8 years ago

TI__Mastermind 31580 points

Hi

I have contacted the UCD team and you should see a response to your post later today.

Regards

Peter

0 Sean Xu over 8 years ago in reply to Peter Meaney

TI__Genius 14580 points

Do you mean you want to know how to measure bode plot of power stage only?

It is as simple as to measure open loop plot. You still need network analyzer. Turn on power supply and regulate the Vout; Insert small signal into the loop; Then use Ch1 to measure the controller output, here is DPWM output which has be averaged; Ch2 is Vout. Choose Ch2/Ch1 to plot the gain and phase.

Regards,
Sean

0 zoujiangyilang over 8 years ago in reply to Sean Xu

Genius 4560 points

thanks!

Power management

Power management forum

UCD3138: measure the development board Bode diagram which did not join the PID compensator part