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參數(shù)資料
| 型號： | TPS54350MPWPREP |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 7.2 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | GREEN, PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 5/36頁 |
| 文件大?。?/td> | 1057K |
| 代理商： | TPS54350MPWPREP |
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T
HICCUP(ms) +
2250
s(kHz)
(7)
Setting the Output Voltage
R2 +
R1
0.891
V
O *
0.891
(8)
Output Voltage Limitations
TPS54350-EP
SGLS308 – OCTOBER 2005
Once the hiccup time is complete, the ENA pin is released and the converter initiates the internal slow-start.
The output voltage of the TPS54350 can be set by feeding back a portion of the output to the VSENSE pin using
a resistor divider network. In the application circuit of Figure 24, this divider network is comprised of resistors R1
and R2. To calculate the resistor values to generate the required output voltage use the following equation:
Start with a fixed value of R1 and calculate the required R2 value. Assuming a fixed value of 10 k
for R1, the
following table gives the appropriate R2 value for several common output voltages:
OUTPUT VOLTAGE (V)
R2 VALUE (k
)
1.2
28.7
1.5
14.7
1.8
9.76
2.5
5.49
3.3
3.74
Due to the internal design of the TPS54350 there are both upper and lower output voltage limits for any given
input voltage. Additionally, the lower boundary of the output voltage set point range is also dependent on
operating frequency. The upper limit of the output voltage set point is constrained by the maximum duty cycle of
the device and is shown in Figure 48. The lower limit is constrained by the minimum controllable on time which
may be as high as 220 ns. The approximate minimum output voltage for a given input voltage and range of
operating frequencies is shown in Figure 29 while the maximum operating frequency versus input voltage for
some common output voltages is shown in Figure 29.
The curves shown in these two figures are valid for output currents greater than 0.5 A. As output currents
decrease towards no load (0 A), the minimum output voltage decreases. For applications where the load current
is less than 100 mA, the curves shown in Figure 31 and Figure 32 are applicable. All of the data plotted in these
curves are approximate and take into account a possible 20 percent deviation in actual operating frequency
relative to the intended set point.
13
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54350MPWPREPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4.5 to 20V Input,3A Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54350PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4.5 to 20V Inp 3A Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54350PWP | 制造商:Texas Instruments 功能描述:IC's |
| TPS54350PWPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 4.5 to 20V Inp 3A Step-Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54350PWPR | 功能描述:開關(guān)變換器、穩(wěn)壓器與控制器 4.5 to 20V Inp 3A Step-Down Converter RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關(guān)頻率:1 MHz 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
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