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參數資料
| 型號： | 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 |
| 文件頁數： | 31/56頁 |
| 文件大小： | 1381K |
| 代理商： | TPS2481PW |
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MaxPossible_I=
V
R
SHUNT_MAX
SHUNT
MaxPossible_I=0.64
Minimum_LSB=
Max_Expected_I
32767
Minimum_LSB=18.311
10
-6
Maximum_LSB=
Max_Expected_I
4096
Maximum_LSB=146.520
10
-6
www.ti.com
SLUS939B – APRIL 2010 – REVISED DECEMBER 2010
Programming The TPS2480/81 Power Measurement Engine
Calibration Register and Scaling
The Calibration Register makes it possible to set the scaling of the Current and Power Registers to whatever
values are most useful for a given application. One strategy may be to set the Calibration Register such that the
largest possible number is generated in the Current Register or Power Register at the expected full-scale point;
this approach yields the highest resolution. The Calibration Register can also be selected to provide values in the
Current and Power Registers that either provide direct decimal equivalents of the values being measured, or
yield a round LSB number. After these choices have been made, the Calibration Register also offers possibilities
for end user system-level calibration, where the value is adjusted slightly to cancel total system error.
Below are two examples for configuring the TPS2480/81 calibration. Both examples are written so the
information directly relates to the calibration setup found in the TPS2480/81EVM software.
Calibration Example 1: Calibrating the TPS2480/81 With No Possibility for Overflow
NOTE
The numbers used in this example are the same used with the TPS2480/81EVM software
as shown in Figure 26. This does not mean the input can go over 26 V!
1. Establish the following parameters:
VBUS_MAX = 32, This does not mean the input can go over 26 V!
VSHUNT_MAX = 0.32
RSHUNT = 0.5
2. Using Equation 30, determine the maximum possible current .
(30)
3. Choose the desired maximum current value. This value is selected based on system expectations.
Max_Expected_I = 0.6
4. Calculate the possible range of current LSBs. To calculate this range, first compute a range of LSBs that is
appropriate for the design. Next, select an LSB within 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 value.
(31)
(32)
Choose an LSB in the range: Minimum_LSB<Selected_LSB < Maximum_LSB
Current_LSB = 20 × 10–6
NOTE
This value was selected to be a round number near the Minimum_LSB. This selection
allows for good resolution with a rounded LSB.
Copyright 2010, Texas Instruments Incorporated
37
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相關代理商/技術參數 |
參數描述 |
|---|---|
| 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 |
| TPS2482PWR | 制造商:Texas Instruments 功能描述:Hot Swap Controller 1-CH 80V 20-Pin TSSOP T/R 制造商:Texas Instruments 功能描述:36V Hotswap Cntlr w/ Digital Pwr Monitor |
| TPS2483EVM-157 | 功能描述:電源管理IC開發(fā)工具 TPS2483 EVAL MOD 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 |
| TPS2483PW | 功能描述:Hot Swap Controller, Monitor 1 Channel General Purpose 20-TSSOP 制造商:texas instruments 系列:- 包裝:管件 零件狀態(tài):有效 類型:熱交換控制器，監(jiān)控器 通道數:1 內部開關:無 應用:通用 特性:自動重試，I2C，UVLO 可編程特性:限流，故障超時 電壓 - 電源:9 V ~ 80 V 電流 - 輸出（最大值）:- 工作溫度:-40°C ~ 85°C 電流 - 電源:2mA 安裝類型:表面貼裝 封裝/外殼:20-TSSOP（0.173"，4.40mm 寬） 供應商器件封裝:20-TSSOP 功能引腳:EN，PG，PROG，TIMER 標準包裝:70 |
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