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參數(shù)資料
| 型號： | LM3543 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Triple Port USB Power Distribution Switch and Over-Current Protection |
| 中文描述： | 三端口USB電源配電開關(guān)和過電流保護 |
| 文件頁數(shù)： | 1/12頁 |
| 文件大?。?/td> | 316K |
| 代理商： | LM3543 |
LM3543
Triple Port USB Power Distribution Switch and
Over-Current Protection
General Description
The LM3543 is a triple high-side power switch that is an
excellent choice for use in Root, Self-Powered and
Bus-Powered USB (Universal Serial Bus) Hubs. Indepen-
dent port enables, flag signals to alert USB controllers of
error conditions, controlled start-up in hot-plug events, and
short circuit protection all satisfy USB requirements.
The LM3543 accepts input voltages between 2.7V and 5.5V.
The Enable logic inputs, available in active-high and
active-low versions, can be powered off any voltage in the
2.7V to 5.5V range. The LM3543 limits the continuous
current through a single port to 1.25A (max.) when it is
shorted to ground.
The low on-state resistance of the LM3543 switches ensures
the LM3543 will satisfy USB voltage drop requirements,
even when current through a switch reaches 500 mA. Thus,
High-Powered USB Functions, Low-Powered USB Func-
tions, and Bus-Powered USB Hubs can all be powered off a
Root or Self-Powered USB Hub containing the LM3543.
Added features of the LM3543 include current foldback to
reduce power consumption in current overload conditions,
thermal shutdown to prevent device failure caused by
high-current overheating, and undervoltage lockout to keep
switches from operating if the input voltage is below
acceptable levels.
Features
n
90m
(typ.) High-Side MOSFET Switch
n
500mA Continuous Current per Port
n
7 ms Fault Flag Delay Filters Hot-Plug Events
n
Industry Standard Pin Order
n
Short Circuit Protection with Power-Saving Current
Foldback
n
Thermal Shutdown Protection
n
Undervoltage Lockout
n
Recognized by UL and Nemko
n
Input Voltage Range: 2.7V to 5.5V
n
5 μA Maximum Standby Supply Current
n
16-Pin SOIC Package
n
Ambient Temperature Range: 40C to 85C
Applications
n
USB Root, Self-Powered, and Bus-Powered Hubs
n
USB Devices such as Monitors and Printers
n
General Purpose High Side Switch Applications
10125832
10125833
Functional Diagram
10125801
March 2001
L
2001 National Semiconductor Corporation
DS101258
www.national.com
相關(guān)PDF資料 |
PDF描述 |
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| LM3544M-H | Quad Port USB Power Distribution Switch and Over-Current Protection |
| LM3544M-L | Backplane/Data Transfer Connector; No. of Contacts:50; No. of Rows:2; Mounting Type:PCB Straight Thru Hole; Contact Plating:Gold; Current Rating:2A; Gender:Female; Leaded Process Compatible:Yes RoHS Compliant: Yes |
| LM3544MX-H | Quad Port USB Power Distribution Switch and Over-Current Protection |
| LM3544MX-L | Quad Port USB Power Distribution Switch and Over-Current Protection |
| LM3544 | Quad Port USB Power Distribution Switch and Over-Current Protection |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM3543B-H E WAF | 制造商:Texas Instruments 功能描述: |
| LM3543B-L WAF | 制造商:Texas Instruments 功能描述: |
| LM3543M-H | 制造商:Texas Instruments 功能描述:USB SW + OC FLAG SMD 3543 SOIC16 |
| LM3543M-H/NOPB | 功能描述:IC PWR SWITCH TRPL HISIDE 16SOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 電源分配開關(guān) 系列:- 特色產(chǎn)品:XRP252 Switches 標準包裝:1 系列:- 類型:高端開關(guān) 輸出數(shù):2 Rds（開）:140 毫歐 內(nèi)部開關(guān):是 電流限制:1.15A 輸入電壓:1.75 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:10-TDFN（3x3） 包裝:Digi-Reel® 其它名稱:1016-1691-6 |
| LM3543M-L | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Triple Port USB Power Distribution Switch and Over-Current Protection |
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