- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98282 > TPS54160DRCT (TEXAS INSTRUMENTS INC) SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數(shù)資料
| 型號： | TPS54160DRCT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | PLASTIC, SON-10 |
| 文件頁數(shù)： | 18/50頁 |
| 文件大小： | 1375K |
| 代理商： | TPS54160DRCT |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁當前第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁
V
O
R
ESR
C
OUT
R
L
VC
gm
ps
fp
fz
Adc
Z
OUT
C
P
s
1
2
V
Adc
V
s
1
2
+
÷
p
è
=
+
÷
p
è
f
ps
L
Adc = gm
R
P
OUT
L
1
f
C
R
2
=
p
Z
OUT
ESR
1
C
R
2
=
p
f
www.ti.com
SLVS795C – OCTOBER 2008 – REVISED OCTOBER 2010
DETAILED DESCRIPTION (continued)
cycle modulator) supplying current to the output capacitor and load resistor. The control to output transfer
function is shown in Equation 14 and consists of a dc gain, one dominant pole, and one ESR zero. The quotient
of the change in switch current and the change in COMP pin voltage (node c in Figure 47) is the power stage
transconductance. The gmPS for the TPS54160 is 6 A/V. The low-frequency gain of the power stage frequency
response is the product of the transconductance and the load resistance as shown in Equation 15.
As the load current increases and decreases, the low-frequency gain decreases and increases, respectively. This
variation with the load may seem problematic at first glance, but fortunately the dominant pole moves with the
load current (see Equation 16). The combined effect is highlighted by the dashed line in the right half of
Figure 48. As the load current decreases, the gain increases and the pole frequency lowers, keeping the 0-dB
crossover frequency the same for the varying load conditions which makes it easier to design the frequency
compensation. The type of output capacitor chosen determines whether the ESR zero has a profound effect on
the frequency compensation design. Using high ESR aluminum electrolytic capacitors may reduce the number
frequency compensation components needed to stabilize the overall loop because the phase margin increases
from the ESR zero at the lower frequencies (see Equation 17).
Figure 48. Simple Small Signal Model and Frequency Response for Peak Current Mode Control
(14)
(15)
(16)
(17)
Small Signal Model for Frequency Compensation
The TPS54160 uses a transconductance amplifier for the error amplifier and readily supports three of the
commonly-used frequency compensation circuits. Compensation circuits Type 2A, Type 2B, and Type 1 are
shown in Figure 49. Type 2 circuits most likely implemented in high bandwidth power-supply designs using low
ESR output capacitors. The Type 1 circuit is used with power-supply designs with high-ESR aluminum
electrolytic or tantalum capacitors.. Equation 18 and Equation 19 show how to relate the frequency response of
the amplifier to the small signal model in Figure 49. The open-loop gain and bandwidth are modeled using the RO
and CO shown in Figure 49. See the application section for a design example using a Type 2A network with a
low ESR output capacitor.
Equation 18 through Equation 27 are provided as a reference for those who prefer to compensate using the
preferred methods. Those who prefer to use prescribed method use the method outlined in the application
section or use switched information.
Copyright 2008–2010, Texas Instruments Incorporated
25
Product Folder Link(s): TPS54160
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS54160DGQ | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS54160DGQR | 2.7 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS5420MDREPG4 | 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS5420MDREP | 5.2 A SWITCHING REGULATOR, 600 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS54225PWP | 4.5 A SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO14 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS54160EVM-230 | 功能描述:電源管理IC開發(fā)工具 TPS54160 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54160EVM-535 | 功能描述:電源管理IC開發(fā)工具 Eval Mod for High Brightness LED Drvr RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS54160-Q1 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:1.5-A 60-V STEP-DOWN SWIFT DC/DC CONVERTER WITH Eco-Mode CONTROL |
| TPS54160QDGQRDL | 制造商:Texas Instruments 功能描述:- Tape and Reel |
| TPS54160QDGQRQ1 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Aut Cat 3.5-60V 1.5A 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: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。