TMP512 datasheet(30/62 Pages) TI2

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Max_Current=Current_LSB

32767

Max_Current=0.06226

Max_ShuntVoltage=Max_Current_Before_Overflow

SHUNT

Max_ShuntVoltage=0.3113

MaximumPower=Max_Current_Before_Overflow

BUS_MAX

MaximumPower=1.992

Corrected_Full_Scale_Cal=trunc

Cal

MeasShuntCurrent

TMP513_Current

Corrected_Full_Scale_Cal=3462

TMP512

TMP513

SBOS491A

– JUNE 2010 – REVISED MAY 2011

www.ti.com

7. Compute the maximum current and shunt voltage values (before overflow), as shown by Equation 20 and

Equation 21. Note that both Equation 20 and Equation 21 involve an If - then condition.

(20)

If Max_Current

≥ MaxPossible_I then

Max_Current_Before_Overflow = MaxPossible_I

Else

Max_Current_Before_Overflow = Max_Current

End If

(Note that Max_Current is less than MaxPossible_I in this example.)

Max_Current_Before_Overflow = 0.06226

(21)

If Max_ShuntVoltage

≥ VSHUNT_MAX

Max_ShuntVoltage_Before_Overflow = VSHUNT_MAX

Else

Max_ShuntVoltage_Before_Overflow= Max_ShuntVoltage

End If

(Note that Max_ShuntVoltage is less than VSHUNT_MAX in this example.)

Max_ShuntVoltage_Before_Overflow = 0.3113

8. Compute the maximum power with Equation 22.

(22)

9. (Optional second calibration step.) Compute the corrected full-scale calibration value based on measured

current.

TMP513_Current = 0.06226

MeaShuntCurrent = 0.05

(23)

TMP512 数据表(PDF) 30 Page - Texas Instruments

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