參數(shù)資料
型號(hào)： LM3488MMX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 穩(wěn)壓器
英文描述： 500kHz and 1MHz High Efficiency 1.5A Switching Regulators; Package: SO; No of Pins: 8; Temperature Range: -40?°C to 85?°C
中文描述： 1 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO8
封裝： MSOP-8
文件頁(yè)數(shù)： 12/24頁(yè)
文件大?。?/td> 626K
代理商： LM3488MMX
Functional Description
(Continued)
The compensation ramp has been added internally in
LM3488. 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.
10138811
FIGURE 3. Compensation Ramp Avoids Sub-Harmonic Oscillation
L
www.national.com
12
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM3488MMX/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
LM3488Q 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488-Q1 制造商:TI 制造商全稱:Texas Instruments 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMM 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulators
LM3488QMM/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
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