參數(shù)資料
型號(hào)： TPS54880EVM
廠商： Texas Instruments, Inc.
英文描述： 8-Amp SWIFT Regulator Evaulation Module(8A SWIFT穩(wěn)壓器TPS54880的評(píng)估模塊)
中文描述： 8安培的SWIFT穩(wěn)壓Evaulation模塊（8A條SWIFT的穩(wěn)壓器TPS54880的評(píng)估模塊）
文件頁(yè)數(shù)： 22/44頁(yè)
文件大?。?/td> 1180K
代理商： TPS54880EVM
Power Sequencing Test
2-4
2.2
Power Sequencing Test
The TPS54x80 regulators provide different modes for power-up and
power-down sequencing of the core and I/O voltages. By selecting the
different ratios for the resistor divider R3/R6 (Figure 4-1), the slope of the core
voltage during power up and down can be set equal to, higher than, or lower
than the slope of I/O voltage. If the resistors R6 = R20 and R3 = R21, then the
core voltage tracks the I/O voltage. The start-up voltage waveform of the
TPS54x80EVM-228 for this condition is shown in Figure 2-2. The waveform
shows that the core voltage regulator tracks the output of the I/O regulator until
the core regulator reaches its nominal 1.8-V level. After that, the core regulator
starts to regulate its output at the preset 1.8-V level. The I/O regulator
continues its ramp-up until the voltage reaches the nominal 3.3-V level. The
output voltage waveforms during power up do not depend on load currents.
These output voltage waveforms are the same for two different ways of
powering up
—
by applying the input voltage with the ENABLE signals for both
channels asserted, or by asserting the ENABLE signal while the input voltage
is already applied. For these tests:
Ch.2: Output voltage of TPS54x80 (1.8 V) 1 V/div.
Ch.3: Output voltage of TPS54x10 (3.3 V) 1 V/div.
Ch.1: Power Good signal of TPS54x80 5 V/div.
Ch.4: Power Good signal of TPS54x10 5 V/div.
Time: 500
μ
s/div.
Figure 2-2.Powering Up With Tracking
The powering down waveform, by using the ENABLE signal, is shown in
Figure 2-3. During power down, the fall time of output voltage depends on the
output capacitance and load resistance. In this case a very low resistance
(0.5
) I/O output load has been selected to show the dynamic performance
of the TPS54x80. It is seen that even if the I/O output voltage falls with the slew
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS54880PWP 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5V Inp 8A 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54880PWPG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5V Inp 8A 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54880PWPR 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5V Inp 8A 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS54880PWPRG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5V Inp 8A 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
TPS548A20EVM-737 功能描述:EVALUATION MODULE 制造商:texas instruments 系列:* 零件狀態(tài):在售 標(biāo)準(zhǔn)包裝:1
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