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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)： | 9/36頁 |
| 文件大小： | 1057K |
| 代理商： | TPS54350MPWPREP |
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0.1942
0.0150
0.06
0.0256
0.1700
0.1340
0.0690
0.0400
Minimum recommended exposed copper
area for powerpad. 5mm stencils may
require 10 percent larger area.
Connect Pin 10 AGND
and Pin 11 PGND to
Analog Ground plane in
this area for optimum
performance.
Minimum recommended top
side Analog Ground area.
0.0400
Minimum recommended thermal vias: 4 x
.013 dia. inside powerpad area and
4 x .013 dia. under device as shown.
Additional .018 dia. vias may be used if top
side Analog Ground area is extended.
0.0570
j0.0130
8 PL
0.1970
0.0371
MODEL FOR LOOP RESPONSE
TPS54350-EP
SGLS308 – OCTOBER 2005
APPLICATION INFORMATION (continued)
Figure 22. Thermal Considerations for PowerPAD Layout
The Figure 23 shows an equivalent model for the TPS54350 control loop which can be modeled in a circuit
simulation program to check frequency response and dynamic load response. The error amplifier in the
TPS54350 is a voltage amplifier with 80 dB (10000 V/V) of open loop gain. The error amplifier can be modeled
using an ideal voltage-controlled current source as shown in Figure 23 with a resistor and capacitor on the
output. The TPS54350 device has an integrated feed forward compensation circuit which eliminates the impact
of the input voltage changes to the overall loop transfer function.
The feed forward gain is modeled as an ideal voltage-controlled voltage source with a gain of 8 V/V. The 1-mV
ac voltage between nodes a and b effectively breaks the control loop for the frequency response measurements.
Plotting b/c shows the small-signal response of the power stage. Plotting c/a shows the small-signal response of
the frequency compensation. Plotting a/b shows the small- signal response of the overall loop. The dynamic load
response can be checked by replacing the RL with a current source with the appropriate load step amplitude and
step rate in a time domain analysis.
17
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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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