參數(shù)資料
型號(hào)： LM3478MMX
廠(chǎng)商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： High Efficiency Low-Side N-Channel Controller for Switching Regulator
中文描述： 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封裝： MSOP-8
文件頁(yè)數(shù)： 11/21頁(yè)
文件大?。?/td> 624K
代理商： LM3478MMX
Functional Description
(Continued)
The compensation ramp has been added internally in
LM3478. The slope of this compensation ramp has been
selected to satisfy most of the applications. The slope of the
internal compensation ramp depends on the frequency. This
slope can be calculated using the formula:
M
C
= V
SL
.F
S
Volts/second
In the above equation, V
SL
is the amplitude of the internal
compensation ramp. Limits for V
SL
have been specified in
the electrical characteristics.
In order to provide the user additional flexibility, a patented
scheme has been implemented inside the IC to increase the
slope of the compensation ramp externally, if the need
arises. Adding a single external resistor, R
(as shown in
Figure 4
) increases the slope of the compensation ramp, M
C
by :
In this equation,
V
SL
is equal to 40.10
-6
R
SL
. Hence,
V
versus R
SL
has been plotted in
Figure 5
for different
frequencies.
10135511
FIGURE 3. Compensation Ramp Avoids Sub-Harmonic Oscillation
L
www.national.com
11
相關(guān)PDF資料
PDF描述
LM3485 Hysteretic PFET Buck Controller
LM3485MM Hysteretic PFET Buck Controller
LM3485MMX Hysteretic PFET Buck Controller
LM3488 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
LM3488MM 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM3478MMX/HALF 制造商:Texas Instruments 功能描述:
LM3478MMX/NOPB 功能描述:DC/DC 開(kāi)關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)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
LM3478MMX/S5000472 制造商:Texas Instruments 功能描述:
LM3478Q 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulator
LM3478QMM 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulator
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*