- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄44551 > LM3311SQ-HIOP/NOPB (NATIONAL SEMICONDUCTOR CORP) 2.6 A SWITCHING REGULATOR, 1280 kHz SWITCHING FREQ-MAX, QCC24 PDF資料下載
參數(shù)資料
| 型號： | LM3311SQ-HIOP/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2.6 A SWITCHING REGULATOR, 1280 kHz SWITCHING FREQ-MAX, QCC24 |
| 封裝： | LEAD FREE, LLP-24 |
| 文件頁數(shù)： | 14/32頁 |
| 文件大?。?/td> | 2504K |
| 代理商： | LM3311SQ-HIOP/NOPB |
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頁當(dāng)前第14頁第15頁第16頁第17頁第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
INTRODUCTION TO COMPENSATION (BOOST
CONVERTER)
20126305
FIGURE 5. (a) Inductor current. (b) Diode current.
The LM3311 is a current mode PWM boost converter. The
signal flow of this control scheme has two feedback loops,
one that senses switch current and one that senses output
voltage.
To keep a current programmed control converter stable
above duty cycles of 50%, the inductor must meet certain cri-
teria. The inductor, along with input and output voltage, will
determine the slope of the current through the inductor (see
Figure 5 (a)). If the slope of the inductor current is too great,
the circuit will be unstable above duty cycles of 50%. A 10H
inductor is recommended for most 660 kHz applications,
while a 4.7H inductor may be used for most 1.28 MHz ap-
plications. If the duty cycle is approaching the maximum of
85%, it may be necessary to increase the inductance by as
much as 2X. See Inductor and Diode Selection for more de-
tailed inductor sizing.
The LM3311 provides a compensation pin (V
C) to customize
the voltage loop feedback. It is recommended that a series
combination of R
C and CC be used for the compensation net-
work, as shown in the typical application circuit. For any given
application, there exists a unique combination of R
C and CC
that will optimize the performance of the LM3311 circuit in
terms of its transient response. The series combination of
R
C and CC introduces a pole-zero pair according to the fol-
lowing equations:
where R
O is the output impedance of the error amplifier, ap-
proximately 900k
. For most applications, performance can
21
www.national.com
LM3311
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3311SQ-HIOP | 2.6 A SWITCHING REGULATOR, 1280 kHz SWITCHING FREQ-MAX, QCC24 |
| LM3354MM-3.7/NOPB | SWITCHED CAPACITOR REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| LM3354MMX-3.3/NOPB | SWITCHED CAPACITOR REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| LM3354MM-5.0/NOPB | SWITCHED CAPACITOR REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
| LM3354MMX-5.0/NOPB | SWITCHED CAPACITOR REGULATOR, 1400 kHz SWITCHING FREQ-MAX, PDSO10 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3311SQX | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3311SQX/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3311SQX-HIOP | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM3311SQX-HIOP/NOPB | 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| LM33164D | 制造商:Motorola Inc 功能描述:33164D |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。