參數(shù)資料
型號: TPS2480PW
廠商: TEXAS INSTRUMENTS INC
元件分類: 電源管理
英文描述: POWER SUPPLY SUPPORT CKT, PDSO20
封裝: GREEN, PLASTIC, TSSOP-20
文件頁數(shù): 37/56頁
文件大?。?/td> 1381K
代理商: TPS2480PW
Max_Current=Current_LSB
32767
Max_Current=62.2573
Max_ShuntVoltage=Max_Current_Before_Overflow
R
SHUNT
Max_ShuntVoltage=0.0622573
MaximumPower=Max_Current_Before_Overflow
V
BUS_MAX
MaximumPower=1992
Corrected_Full_Scale_Cal=trunc
Cal
MeasShuntCurrent
TPS2480/81_Current
Corrected_Full_Scale_Cal=21422
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
www.ti.com
7. Compute the maximum current and shunt voltage values (before overflow), as shown by Equation 44 and
Equation 45. Note that both Equation 44 and Equation 45 involve an If - then condition.
(44)
If Max_Current
≥ Max Possible_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 = 62.2573 (Note: This result is displayed by software as seen in Figure 27.)
(45)
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 = 0.0622573 (Note: This result is displayed by software as seen in
8. Compute the maximum power with equation 8.
(46)
9. (Optional second calibration step.) Compute the corrected full-scale calibration value based on measured
current.
TPS2480/81_Current = 25.2472
MeaShuntCurrent = 25.09
(47)
42
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2480 TPS2481
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