Motore di ricerca datesheet componenti elettronici
  Italian  ▼
ALLDATASHEETIT.COM

X  

LM2673T-ADJ Scheda tecnica(PDF) 10 Page - Texas Instruments

Click here to check the latest version.
Il numero della parte LM2673T-ADJ
Spiegazioni elettronici  LM2673 SIMPLE SWITCHER짰 3-A Step-Down Voltage Regulator With Adjustable Current Limit
Download  37 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

LM2673T-ADJ Scheda tecnica(HTML) 10 Page - Texas Instruments

Back Button LM2673T-ADJ Datasheet HTML 6Page - Texas Instruments LM2673T-ADJ Datasheet HTML 7Page - Texas Instruments LM2673T-ADJ Datasheet HTML 8Page - Texas Instruments LM2673T-ADJ Datasheet HTML 9Page - Texas Instruments LM2673T-ADJ Datasheet HTML 10Page - Texas Instruments LM2673T-ADJ Datasheet HTML 11Page - Texas Instruments LM2673T-ADJ Datasheet HTML 12Page - Texas Instruments LM2673T-ADJ Datasheet HTML 13Page - Texas Instruments LM2673T-ADJ Datasheet HTML 14Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 37 page
background image
10
LM2673
SNVS030O – APRIL 2000 – REVISED JUNE 2016
www.ti.com
Product Folder Links: LM2673
Submit Documentation Feedback
Copyright © 2000–2016, Texas Instruments Incorporated
Feature Description (continued)
7.3.2 Input
The input voltage for the power supply is connected to pin 2. In addition to providing energy to the load the input
voltage also provides bias for the internal circuitry of the LM2673. For ensured performance the input voltage
must be in the range of 8 V to 40 V. For best performance of the power supply the input pin must always be
bypassed with an input capacitor located close to pin 2.
7.3.3 C Boost
A capacitor must be connected from pin 3 to the switch output, pin 1. This capacitor boosts the gate drive to the
internal MOSFET above VIN to fully turn it ON. This minimizes conduction losses in the power switch to maintain
high efficiency. The recommended value for C Boost is 0.01 µF.
7.3.4 Ground
This is the ground reference connection for all components in the power supply. In fast-switching, high-current
applications such as those implemented with the LM2673, TI recommends that a broad ground plane be used to
minimize signal coupling throughout the circuit.
7.3.5 Current Adjust
A key feature of the LM2673 is the ability to tailor the peak switch current limit to a level required by a particular
application. This alleviates the need to use external components that must be physically sized to accommodate
current levels (under shorted output conditions for example) that may be much higher than the normal circuit
operating current requirements.
A resistor connected from pin 5 to ground establishes a current (I(pin 5) = 1.2 V / RADJ) that sets the peak current
through the power switch. The maximum switch current is fixed at a level of 37,125 / RADJ.
7.3.6 Feedback
This is the input to a two-stage high gain amplifier, which drives the PWM controller. It is necessary to connect
pin 6 to the actual output of the power supply to set the DC output voltage. For the fixed output devices (3.3-V, 5-
V, and 12-V outputs), a direct wire connection to the output is all that is required as internal gain setting resistors
are provided inside the LM2673. For the adjustable output version two external resistors are required to set the
dc output voltage. For stable operation of the power supply it is important to prevent coupling of any inductor flux
to the feedback input.
7.4 Device Functional Modes
7.4.1 Soft-Start
A capacitor connected from pin 7 to ground allows for a slow turnon of the switching regulator. The capacitor sets
a time delay to gradually increase the duty cycle of the internal power switch. This can significantly reduce the
amount of surge current required from the input supply during an abrupt application of the input voltage. If soft
start is not required this pin must be left open circuited. See CSS Soft-Start Capacitor for further information
regarding soft-start capacitor values.


Codice articolo simile - LM2673T-ADJ

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
logo
National Semiconductor ...
LM2673T-ADJ NSC-LM2673T-ADJ Datasheet
451Kb / 26P
   SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit
logo
Texas Instruments
LM2673T-ADJ TI-LM2673T-ADJ Datasheet
1Mb / 35P
[Old version datasheet]   LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current
More results

Descrizione simile - LM2673T-ADJ

Produttore elettroniciIl numero della parteScheda tecnicaSpiegazioni elettronici
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


Scheda tecnica Scarica

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEETIT.COM
Lei ha avuto il aiuto da alldatasheet?  [ DONATE ] 

Di alldatasheet   |   Richest di pubblicita   |   contatti   |   Privacy Policy   |   scambio Link   |   Ricerca produttore
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