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TPS23881: Channel power measurement

Part Number: TPS23881

Hi,

We are using TPS23881 in 2pair mode in our design. 

We could power ON PD in semiauto mode and auto mode.

We are using resisters 30h to 3Fh to read current and voltage values of corresponding channels and calculate PD power using current and voltage. 

But sometimes we are reading voltage values below 40V and sometimes even  in the range of 0-10V. Current values are stable during this time and PD is powered ON. 

Since the voltage values are much lesser our power calculations are wrongly calculated . 

Could you please let us know why low voltage values are being read. 

Regards,

Charan.