參數(shù)資料
型號(hào): TPS2481PW
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(yè)數(shù): 32/56頁(yè)
文件大?。?/td> 1381K
代理商: TPS2481PW
Cal=trunc
0.04096
Current_LSB
R
SHUNT
Cal=4096
Power_LSB=20
Current_LSB
Power_LSB=400
10
-6
Max_Current=Current_LSB
32767
Max_Current=0.65534
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
www.ti.com
5. Compute the Calibration Register value using Equation 33:
(33)
6. Calculate the Power LSB, using Equation 34. Equation 34 shows a general formula; because the bus voltage
measurement LSB is always 4 mV, the power formula reduces to the calculated result.
(34)
7. Compute the maximum current and shunt voltage values (before overflow), as shown by Equation 35 and
Equation 36. Note that both Equation 35 and Equation 36 involve an If - then condition:
(35)
If Max_Current
≥ Max Possible_I then
Max_Current_Before_Overflow = MaxPossible_I
Else
Max_Current_Before_Overflow = Max_Current
End If
NOTE
(Max_Current is greater than MaxPossible_I in this example.)
38
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TPS2480 TPS2481
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