參數(shù)資料
型號： LM3478
廠商： National Semiconductor Corporation
英文描述： High Efficiency Low-Side N-Channel Controller for Switching Regulator
中文描述： 高效率低側(cè)N溝道開關(guān)穩(wěn)壓器控制器
文件頁數(shù)： 11/21頁
文件大?。?/td> 624K
代理商： LM3478
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM3478_09 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Efficiency Low-Side N-Channel Controller for Switching Regulator
LM3478EVAL 功能描述:BOARD EVALUATION LM3478 RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:- 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969
LM3478EVAL/NOPB 功能描述:電源管理IC開發(fā)工具 EVAL BOARDFOR LM3478 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
LM3478MA/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
LM3478MAX/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
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