TMS320F2800157-Q1: PMP23340C2K Scaling Questions

Part Number: TMS320F2800157-Q1
Other Parts Discussed in Thread: POWERSUITE

Hi expert,

     Customer has questions about pmp23340 scaling calucation. Can you please help to clarify?

1. #define BRICK_VINSNS_SENSE_MAX_VOLTS        ((float32_t)100)

   However, according to schematc VOSNS2_max should be 3.3(R20+R23)/R23 =  3.3 *(10+2.8)/2.8= 15.0857V 

   Why program and powersuite set it to 100V?

   If you look at  #define BRICK_VOUT_SCALE    ((float32_t) 3.3f / 4096.0f * (10.0f + 2.8f) / 2.8f), The Vout max used for calculating scale is correct. May we know where is 100V coming from?

     2. The same question to VINSNS

        #define BRICK_VINSNS_SENSE_MAX_VOLTS        ((float32_t)100)

        By calcuation the VIN max should be 60.46V

    3. May we know how to calcuate Ipri max from schematic? 

        How do we get these value?

         #define BRICK_ISNS_SCALE    ((float32_t) 3.3f / 4096.0f / (20.0f * 0.0002f))

 

How can we calculate current value from Vsw1-Vsw2?