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參數(shù)資料
| 型號(hào)： | TPS40090QPWRQ1 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 1200 kHz SWITCHING FREQ-MAX, PDSO24 |
| 封裝： | GREEN, PLASTIC, TSSOP-24 |
| 文件頁(yè)數(shù)： | 11/23頁(yè) |
| 文件大?。?/td> | 309K |
| 代理商： | TPS40090QPWRQ1 |
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R1
R +
R
NTC1 * RNTC2
R
E1
R
E2 * RNTC1
R
E2
1 * RNTC2 ) RNTC2
R
E1
1 * RNTC1
R
NTC1
R
E1
1 * RNTC2 * RNTC2
R
E2
1 * RNTC1 * RNTC1 * RNTC2
R2
R + 1 * RNTC1
1
1 * R1R
*
R
NTC1
R
E1 * R1R
*1
RNTC
R +
1 * R1R
*1
* R2R
*1
k +
RNTC
S
RNTC
C
R1
C + RTHE(25)
(1 * k) ) k
R1
R
SLUS845C
– JUNE 2008 – REVISED MAY 2011
6. From the NTC resistor datasheet get the relative resistance for resistors with desired curve. For the given
example and curve 17 for NTHS NTC resistors from Vishay RNTC1= 0.3507 and RNTC2= 0.08652.
7. Calculate relative values for network resistors including the NTC resistor.
(21)
(22)
(23)
For the given example R1R= 0.281, R2R = 2.079, and RNTCR = 1.1.
8. Calculate the absolute value of the NTC resistor as RTHE(25). In given example RNTC = 244.3 k.
9. Find a standard value for the NTC resistor with chosen curve type. In case the close value does not exist in a
desired form factor or curve type. Chose a different type of the NTC resistor and repeat steps 6 to 9. In the
example, the NTC resistor with the part number NTHS0402N17N2503J with RNTCS(25) = 250 k is close
enough to the calculated value.
10. Calculate a scaling factor for the chosen NTC resistor as a ratio between selected and calculated NTC value
and. In the example k = 1.023.
(24)
11. Calculate values of the remaining network resistors.
(25)
For the given example, R1C= 58.7 k and R2C = 472.8 k. Pick the closest available 1% standard values:
R1 = 39.2 k
, and R2 = 475 k, thus completing the design of the thermally compensated network for the
DCR current sensor.
Figure 13 illustrates the fit of the designed network to the required function.
Copyright
2008–2011, Texas Instruments Incorporated
19
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| TPS40090RHDR | 功能描述:DC/DC 開(kāi)關(guān)控制器 4 Ch Multiph Buck DC/DC Controller RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40090RHDRG4 | 功能描述:DC/DC 開(kāi)關(guān)控制器 4Ch Multiphase Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40090RHDT | 功能描述:DC/DC 開(kāi)關(guān)控制器 4Ch Multiphase Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40090RHDTG4 | 功能描述:DC/DC 開(kāi)關(guān)控制器 4Ch Multiphase Buck DC/DC Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40091 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH FREQUENCY MULTIPHASE CONTROLLER |
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