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| 型號： | TPS54673EVM |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 6-Amp SWIFT Regulator With Disabled Sink During Start-Up Evaulation Module(帶上電時禁止吸收電流功能的6A SWIFT穩(wěn)壓器TPS54673的評估模塊) |
| 中文描述： | 6安培的SWIFT調(diào)節(jié)器在啟動殘疾人水槽行動Evaulation模塊（帶上電時禁止吸收電流功能的6A條SWIFT的穩(wěn)壓器TPS54673的評估模塊） |
| 文件頁數(shù)： | 29/42頁 |
| 文件大?。?/td> | 908K |
| 代理商： | TPS54673EVM |
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Start-Up
2-13
Test Setup and Results
2.9
Start-Up
Start-up voltage waveforms of the TPS54673EVM
–
225 are shown in
Figure 2
–
17
through
Figure 2
–
19
. Figure 2
–
17 shows the start-up waveform
with no precharge on the output. When the V
I
reaches the nominal 2.95-V
UVLO threshold, the slow-start capacitor (C6) begins to charge. When the
voltage on the SS/ENA pin reaches the enable threshold of 1.2 V, the internal
reference begins to ramp up at the slow-start rate. As the internal reference
voltage increases relative to the voltage at VSENSE, the duty cycle of the
PWM comparator output increases. The internal FETs are inhibited from
switching until the output of the PWM comparator reaches maximum duty
cycle. When maximum duty cycle is reached, switching starts and the output
rises quickly while the output voltage catches up with the slow-start ramp rate.
At this point the voltage on the VSENSE pin matches the internal reference
and the output continues to ramp up to the final set point value of 2.5 V at the
slow-start rate.
Figure 2
–
17. Measured Start-Up Waveform, TPS54673 With No Precharge
VI 1 V/div
Time Scale
–
5
μ
s/div
VO 1 V/div
Figure 2
–
18
Shows the start-up waveform with the output precharged and a
2-
load. The precharge is achieved by connecting the 3.3-V input to the
output with two diodes in series. The start-up mechanism is the same as
described above except that the internal reference must ramp up above the
voltage fed back from the precharged output to the VSENSE pin before
switching can start. Once this occurs, the output continues to ramp up to the
output set point of 2.5 V at the slow-start rate.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54673PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 6A Sync Buck 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54673PWPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 6A Sync Buck 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54673PWPR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 6A Sync Buck 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54673PWPRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 6A Sync Buck 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS54678 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:2.95 V to 6 V INPUT, 6 A OUTPUT, 2 MHz, SYNCHRONOUS STEP DOWN SWITCHER WITH INTEGRATED FET ( SWIFTa?￠) |
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