数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

LM2673SX-5.0 数据表(PDF) 11 Page - Texas Instruments

部件名 LM2673SX-5.0
功能描述  LM2673 SIMPLE SWITCHER짰 3-A Step-Down Voltage Regulator With Adjustable Current Limit
Download  37 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM2673SX-5.0 数据表(HTML) 11 Page - Texas Instruments

Back Button LM2673SX-5.0 Datasheet HTML 7Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 8Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 9Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 10Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 11Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 12Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 13Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 14Page - Texas Instruments LM2673SX-5.0 Datasheet HTML 15Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 37 page
background image
11
LM2673
www.ti.com
SNVS030O – APRIL 2000 – REVISED JUNE 2016
Product Folder Links: LM2673
Submit Documentation Feedback
Copyright © 2000–2016, Texas Instruments Incorporated
8 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
8.1 Application Information
8.1.1 Design Considerations
Power supply design using the LM2673 is greatly simplified by using recommended external components. A wide
range of inductors, capacitors and Schottky diodes from several manufacturers have been evaluated for use in
designs that cover the full range of capabilities (input voltage, output voltage, and load current) of the LM2673. A
simple design procedure using nomographs and component tables provided in this data sheet leads to a working
design with very little effort.
The individual components from the various manufacturers called out for use are still just a small sample of the
vast array of components available in the industry. While these components are recommended, they are not
exclusively the only components for use in a design. After a close comparison of component specifications,
equivalent devices from other manufacturers could be substituted for use in an application.
Important considerations for each external component and an explanation of how the nomographs and selection
tables were developed follows.
8.1.2 Inductor
The inductor is the key component in a switching regulator. For efficiency the inductor stores energy during the
switch ON time and then transfers energy to the load while the switch is OFF.
Nomographs are used to select the inductance value required for a given set of operating conditions. The
nomographs assume that the circuit is operating in continuous mode (the current flowing through the inductor
never falls to zero). The magnitude of inductance is selected to maintain a maximum ripple current of 30% of the
maximum load current. If the ripple current exceeds this 30% limit the next larger value is selected.
The inductors offered have been specifically manufactured to provide proper operation under all operating
conditions of input and output voltage and load current. Several part types are offered for a given amount of
inductance. Both surface mount and through-hole devices are available. The inductors from each of the three
manufacturers have unique characteristics.
Renco: ferrite stick core inductors; benefits are typically lowest cost and can withstand ripple and transient
peak currents above the rated value. These inductors have an external magnetic field, which may generate
EMI.
Pulse Engineering: powdered iron toroid core inductors; these also can withstand higher than rated currents
and, being toroid inductors, has low EMI.
Coilcraft: ferrite drum core inductors; these are the smallest physical size inductors and are available only as
surface mount components. These inductors also generate EMI but less than stick inductors.
8.1.3 Output Capacitor
The output capacitor acts to smooth the dc output voltage and also provides energy storage. Selection of an
output capacitor, with an associated equivalent series resistance (ESR), impacts both the amount of output ripple
voltage and stability of the control loop.
The output ripple voltage of the power supply is the product of the capacitor ESR and the inductor ripple current.
The capacitor types recommended in the tables were selected for having low ESR ratings.
In addition, both surface mount tantalum capacitors and through-hole aluminum electrolytic capacitors are offered
as solutions.


类似零件编号 - LM2673SX-5.0

制造商部件名数据表功能描述
logo
Texas Instruments
LM2673SX-5.0 TI-LM2673SX-5.0 Datasheet
1Mb / 35P
[Old version datasheet]   LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
More results

类似说明 - LM2673SX-5.0

制造商部件名数据表功能描述
logo
National Semiconductor ...
LM2673 NSC-LM2673_08 Datasheet
650Kb / 26P
   SIMPLE SWITCHER짰 3A Step-Down Voltage Regulator with Adjustable Current Limit
logo
Texas Instruments
LM2679 TI1-LM2679 Datasheet
2Mb / 37P
[Old version datasheet]   LM2679 SIMPLE SWITCHER짰 5-A Step-Down Voltage Regulator With Adjustable Current Limit
LM2673SX-ADJ TI-LM2673SX-ADJ Datasheet
1Mb / 35P
[Old version datasheet]   LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
logo
National Semiconductor ...
LM22679 NSC-LM22679 Datasheet
386Kb / 16P
   5A SIMPLE SWITCHER짰, Step-Down Voltage Regulator with Adjustable Soft-Start and Current Limit
logo
Texas Instruments
LM2679 TI-LM2679_15 Datasheet
1Mb / 35P
[Old version datasheet]   LM2679 SIMPLE SWITCHER짰 5A Step-Down Voltage Regulator with Adjustable Current
logo
National Semiconductor ...
LM2679 NSC-LM2679 Datasheet
355Kb / 24P
   SIMPLE SWITCHER 5A Step-Down Voltage Regulator with Adjustable Current Limit
LM2673 NSC-LM2673 Datasheet
451Kb / 26P
   SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
logo
Texas Instruments
LM22672 TI-LM22672_15 Datasheet
1Mb / 30P
[Old version datasheet]   SIMPLE SWITCHER짰 Step-Down Voltage Regulator with Features
logo
National Semiconductor ...
LM1575 NSC-LM1575_07 Datasheet
848Kb / 28P
   SIMPLE SWITCHER짰 1A Step-Down Voltage Regulator
logo
Texas Instruments
LM2576S-5.0-NOPB TI1-LM2576S-5.0-NOPB Datasheet
3Mb / 37P
[Old version datasheet]   SIMPLE SWITCHER짰 3A Step-Down Voltage Regulator
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com