TIDM-1000: AMC1301

Steven MacDonald1

Prodigy 210 points

Part Number: TIDM-1000
Other Parts Discussed in Thread: AMC1301

Good Afternoon,

I am changing the pfc feedback bus resistors and making the changes in the calculation excel spreadsheet.

I am wondering where the RDiff value 18000 comes from and if it will need to change?

Thanks

Steve

over 6 years ago

0 Chen Jiang ti over 6 years ago

TI__Genius 16085 points

Hi Steven,

This is the input impedance of the device coming from the AMC1301 data sheet. Please refer to page 23 for more information. I don't think you need to change it in calculation.

Regards,

Chen

0 Steven MacDonald1 over 6 years ago in reply to Chen Jiang ti

Prodigy 210 points

As a follow on question, what will need to be changed in the code if I change the voltage divider at the input to the AMC1301?

Thanks

Steve

0 Chen Jiang ti over 6 years ago in reply to Steven MacDonald1

TI__Genius 16085 points

Hi Steven,

You need to pay attention to those max sense value in the code, for example

#define VIENNA_VAC_MAX_SENSE_VOLTS ((float32_t)454)
#define VIENNA_VDCBUS_MAX_SENSE_VOLTS ((float32_t)717.79)

These value theorectially is coming from your new voltage devider, but due to some issues listed in the thread below, they are not exactly the same.

Regards,

Chen

C2000™︎ microcontrollers

C2000 microcontrollers forum

TIDM-1000: AMC1301