參數(shù)資料
型號(hào)： TPS62100DR
英文描述： Analog IC
中文描述： 模擬IC
文件頁(yè)數(shù)： 13/23頁(yè)
文件大?。?/td> 358K
代理商： TPS62100DR
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
loop compensation and the TPS6210X series of converters (continued)
Note that f
z1
is a lower frequency than f
z2
. It is suggested that a spice or other simulator be used to verify
feedback loop characteristics. When doing this modeling, be sure to use an amplifier that has a band limited
response. Setting the amplifier up for an 80 dB gain with a single dominant pole at 200 Hz (2 MHz GBWP) will
lead to a good loop design. The gain/phase plots for the example circuits were all done using a 2 MHz GBWP
amplifier. Look at the example schematics and note where the poles and zeros are for an indication of where
to start compensating a new design.
current limiting
The TPS6210x family has built-in over-current protection and thermal shutdown. The over-current protection
is done in two stages. The first stage trips at approximately 1 A and simply causes an immediate pulse
termination. If a hard short is present at the output of the LC filter, propagation delays from the first-level over
current could allow the current to ratchet up in the inductor. To prevent this from happening, a second level of
over-current protection trips at approximately 1.2 A. When this level is tripped, the chip is forced to do a soft start.
If the chip is in an abnormally high ambient temperature, or has an inadequate heatsink for the power levels
demanded, the thermal shutdown circuitry causes the chip to shut down if the die temperature ever reaches
170
°
C. After the die cools, normal operation resumes with a full soft start.
UDG–00050
V
OUT
V
FB
815mV
785mV
V
SW
I
L
200mA
Figure 4. Typical Pulsed-Variable-Frequency Mode (PFM) Circuit Waveform
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TPS62100DRG4 功能描述:開(kāi)關(guān)變換器、穩(wěn)壓器與控制器 Multimd 300kHz Sync Sync Buck 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(kāi)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
TPS62101D 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Multimd 600kHz Sync Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62101DG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Multimd 600kHz Sync Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62101DR 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Multimd 600kHz Sync Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
TPS62101DRG4 功能描述:直流/直流開(kāi)關(guān)調(diào)節(jié)器 Multimd 600kHz Sync Sync Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開(kāi)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
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