- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄358846 > LM3544MX-L (NATIONAL SEMICONDUCTOR CORP) Quad Port USB Power Distribution Switch and Over-Current Protection PDF資料下載
參數(shù)資料
| 型號(hào)： | LM3544MX-L |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Quad Port USB Power Distribution Switch and Over-Current Protection |
| 中文描述： | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁(yè)數(shù)： | 12/13頁(yè) |
| 文件大?。?/td> | 349K |
| 代理商： | LM3544MX-L |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)當(dāng)前第12頁(yè)第13頁(yè)
Typical Applications
(Continued)
to awaken a suspended PC). A schematic showing an
example of how the LM3544 can be configured to switch the
power connection of a device between two separate sources
is shown in Figure 8 below.
In the example, the logic signals EN and SRC control the
power supply connections. If the EN signal is low, all four
LM3544 switches will be open and neither supply will be
connected to the bus. If EN and SRC are both high, switch 1
and switch 3 close, connecting the main power supply to the
two bus power outputs. When EN is high and SRC is low, the
auxiliary supply is connected to the power outputs through
switches 2 and 4.
In order to allow the power-switching circuit to smoothly
transition from one supply to another, delay networks must
be placed before the enable pins. These delay networks
account for the turn-on delay of the LM3544 switches by
slowing the fall time of the enable signals. Rise times of
these signals are not affected by the delay networks. Glitch
free transition is assured as long as both supplies remain
within operating specifications for a minimum of 5 ms after
the logic signal SRC is toggled.
10120830
FIGURE 8. Using the LM3544 in a Wake-on-USB Application
L
www.national.com
12
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM3544 | Quad Port USB Power Distribution Switch and Over-Current Protection |
| LM3557SD-2 | Step-Up Converter for White LED Applications |
| LM3557SDX-2 | Step-Up Converter for White LED Applications |
| LM3557 | Step-Up Converter for White LED Applications |
| LM3570 | Low Noise White LED Driver System |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3544MX-L/NOPB | 功能描述:電源開(kāi)關(guān) IC - USB RoHS:否 制造商:Micrel 電源電壓-最小:2.7 V 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| LM3549 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Evaluation Kit high power LED driver with up to 700mA |
| LM3549SQ/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM3549SQE/NOPB | 功能描述:LED照明驅(qū)動(dòng)器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LM3549SQEV/NOPB | 功能描述:LED 照明開(kāi)發(fā)工具 LM3549SQ EVAL BOARD RoHS:否 制造商:Fairchild Semiconductor 產(chǎn)品:Evaluation Kits 用于:FL7732 核心: 電源電壓:120V 系列: 封裝: |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。