參數(shù)資料
型號： TPS54383PWPR
廠商： TEXAS INSTRUMENTS INC
元件分類： 穩(wěn)壓器
英文描述： 7 A DUAL SWITCHING CONTROLLER, 375 kHz SWITCHING FREQ-MAX, PDSO14
封裝： GREEN, PLASTIC, HTSSOP-14
文件頁數(shù)： 15/58頁
文件大小： 1773K
代理商： TPS54383PWPR
www.ti.com
f
EQ
ESR(zero)
1
C1
2
R
=
p
(5)
EQ
1
R
R3
1
R1
R2
=
+
+
÷
÷
÷
è
è
è
(6)
f
EQ
POLE(desired)
1
C1
2
R
=
p
(7)
EQ
1
R
R3
1
R1
R2
=
+
+
÷
÷
÷
è
è
è
(8)
(
)
(
)
fC
1
R1
C2
1
2
R1
R2
R3
R2
R3
=
+
p
÷
÷
+
è
(9)
SLUS774B – AUGUST 2007 – REVISED OCTOBER 2007
The value of the capacitor is calculated in Equation 5.
where:
R
EQ is an equivalent impedance created by the parallel combination of the voltage setting divider resistors (R1
and R2) in series with R3.
Using All Ceramic Output Capacitors
With low ESR ceramic capacitors, there may not be enough phase margin at the crossover frequency. In this
case, (Ref Figure 30) resistor R3 is set equal to 1/2 R2. This lowers the gain by 6 dB, reduce the crossover
frequency, and improve phase margin.
The value of C1 is found by determining the frequency to place the low frequency pole. The minimum frequency
to place the pole is 1 kHz. Any lower, and the time constant will be too slow and interfere with the internal soft
start. (Ref. Soft Start) The upper bound for the pole frequency is determined by the operating frequency of the
converter. It is 3 kHz for the TPS54x83, and 6 kHz for the TPS54x86. C1 is then found from Equation 7. Keep
component tolerances in mind when selecting the desired pole frequency.
where:
f
POLE(desired)is the desired pole frequency between 1 kHz and 3 kHz (TPS54x83) or 1 kHz and 6 kHz
(TPS54x86).
R
EQ is an equivalent impedance created by the parallel combination of the voltage setting divider resistors (R1
and R2) in series with R3.
If it is necessary to increase phase margin, place a capacitor in parallel with the upper voltage setting divider
resistor (Ref. C2 in Equation 9).
where
f
C is the unity gain crossover frequency, (approximately 50 kHz for most designs following these guidelines)
22
Copyright 2007, Texas Instruments Incorporated
Product Folder Link(s): TPS54383 TPS54386
相關(guān)PDF資料
PDF描述
TC7660SEOA SWITCHED CAPACITOR REGULATOR, 45 kHz SWITCHING FREQ-MAX, PDSO8
TPS3110E12DBVT 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO6
TOP248F 7.2 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PZIP6
TD075-048-15M 1-OUTPUT 75 W DC-DC REG PWR SUPPLY MODULE
TD100-150-12M 1-OUTPUT 100 W DC-DC REG PWR SUPPLY MODULE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS54383PWPRG4 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Non-Synch 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
TPS54386 制造商:TI 制造商全稱:Texas Instruments 功能描述:SWIFT Converter Product Portfolio
TPS54386EVM 功能描述:電源管理IC開發(fā)工具 TPS54386 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
TPS54386PWP 功能描述:直流/直流開關(guān)調(diào)節(jié)器 DC/DC Controller 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
TPS54386PWP 制造商:Texas Instruments 功能描述:DC/DC Controller
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*