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參數資料
| 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： | 36/56頁 |
| 文件大小： | 1381K |
| 代理商： | TPS2480PW |
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MaxPossible_I=
V
R
SHUNT_MAX
SHUNT
MaxPossible_I=320
Minimum_LSB=
Max_Expected_I
32767
Minimum_LSB=1.831
10
-3
Maximum_LSB=
Max_Expected_I
4096
Maximum_LSB=14.652
10
-3
Cal=trunc
0.04096
Current_LSB
R
SHUNT
Cal=21557
Power_LSB=20
Current_LSB
Power_LSB=38
10
-3
www.ti.com
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
Calibration Example 2 (Overflow Possible)
This design example uses the nine-step procedure for calibrating the TPS2480/81 where overflow is possible.
Figure 27 illustrates how the same procedure is performed using the automated TPS2480/81EVM software.
NOTE
(The same numbers used in the nine-step example are used in the software example in
example, the information entered in Step 1 is circled in Figure 27 and labeled).
1. Establish the following parameters:
VBUS_MAX = 32, This does not mean the input can go over 26 V!
VSHUNT_MAX = 0.32
RSHUNT = 0.001
2. Determine the maximum possible current using Equation 39:
(39)
3. Choose the desired maximum current value: Max_Expected_I,
≤ MaxPossible_I. This value is selected
based on system expectations.
Max_Expected_I = 60
4. Calculate the possible range of current LSBs. This calculation is done by first computing a range of LSB's
that is appropriate for the design. Next, select an LSB withing this range. Note that the results will have the
most resolution when the minimum LSB is selected. Typically, an LSB is selected to be the nearest round
number to the minimum LSB.
(40)
(41)
Choose an LSB in the range: Minimum_LSB<Selected_LSB<Maximum_LSB
Current_LSB = 1.9 × 10–3
NOTE
This value was selected to be a round number near the Minimum_LSB. This section
allows for good resolution with a rounded LSB.
5. Compute the calibration register using Equation 42:
(42)
6. Calculate the Power LSB using Equation 43. Equation 43 shows a general formula; because the bus voltage
measurement LSB is always 4mV, the power formula reduces to calculate the result.
(43)
Copyright 2010, Texas Instruments Incorporated
41
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS2480PWR | 功能描述:熱插拔功率分布 Pos Vltg,Int Prot Dev/Hotswap Cntrlr RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2481EVM-001 | 功能描述:電源管理IC開發工具 Eval Mod for TPS2481 RoHS:否 制造商:Maxim Integrated 產品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS2481PW | 功能描述:熱插拔功率分布 Pos VltgInt Prot Dev/Hotswap Cntrlr RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2481PWR | 功能描述:熱插拔功率分布 Pos VltgInt Prot Dev/Hotswap Cntrlr RoHS:否 制造商:Texas Instruments 產品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
| TPS2482PW | 制造商:Texas Instruments 功能描述:Hot Swap Controller 1-CH 80V 20-Pin TSSOP Tube 制造商:Texas Instruments 功能描述:IC CTRLR HOT SWAP 9-36V 20TSSOP 制造商:Texas Instruments 功能描述:36V Hotswap Cntlr w/ Digital Pwr Monitor |
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