Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

LM2596 Fiches technique(PDF) 10 Page - ON Semiconductor

No de pièce LM2596
Description  3.0 A, Step-Down Switching Regulator
Download  25 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

LM2596 Fiches technique(HTML) 10 Page - ON Semiconductor

Back Button LM2596 Datasheet HTML 6Page - ON Semiconductor LM2596 Datasheet HTML 7Page - ON Semiconductor LM2596 Datasheet HTML 8Page - ON Semiconductor LM2596 Datasheet HTML 9Page - ON Semiconductor LM2596 Datasheet HTML 10Page - ON Semiconductor LM2596 Datasheet HTML 11Page - ON Semiconductor LM2596 Datasheet HTML 12Page - ON Semiconductor LM2596 Datasheet HTML 13Page - ON Semiconductor LM2596 Datasheet HTML 14Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 25 page
background image
LM2596
http://onsemi.com
10
PROCEDURE (ADJUSTABLE OUTPUT VERSION: LM2596) (CONTINUED)
Procedure
Example
4. Inductor Selection (L1)
A. Use the following formula to calculate the inductor Volt x
microsecond [V x ms] constant:
B. Match the calculated E x T value with the corresponding
number on the vertical axis of the Inductor Value Selection
Guide shown in Figure 18. This E x T constant is a
measure of the energy handling capability of an inductor and
is dependent upon the type of core, the core area, the
number of turns, and the duty cycle.
C. Next step is to identify the inductance region intersected by
the E x T value and the maximum load current value on the
horizontal axis shown in Figure 18.
D. Select an appropriate inductor from Table 3.
The inductor chosen must be rated for a switching
frequency of 150 kHz and for a current rating of 1.15 x ILoad.
The inductor current rating can also be determined by
calculating the inductor peak current:
where ton is the “on” time of the power switch and
E
T + VIN * VOUT * VSAT
VOUT ) VD
VIN * VSAT ) VD
1000
150 kHz
V
ms
Ip(max) + ILoad(max))
Vin *Vout ton
2L
ton +
Vout
Vin
x 1.0
fosc
4. Inductor Selection (L1)
A. Calculate E x T [V x ms] constant:
B. E x T = 27 [V x ms]
C. ILoad(max) = 3.0 A
Inductance Region = L40
D. Proper inductor value = 33 mH
Choose the inductor from Table 3.
E
T + 12 * 5 * 1.5
5 ) 0.5
12 * 5 ) 0.5
1000
150 kHz
V
ms
E
T + 5.5
5.5
7.5
6.6 V
ms
5. Output Capacitor Selection (Cout)
A. Since the LM2596 is a forward−mode switching regulator
with voltage mode control, its open loop has 2−pole−1−zero
frequency characteristic. The loop stability is determined by
the output capacitor (capacitance, ESR) and inductance
values.
For stable operation use recommended values of the output
capacitors in Table 1.
Low ESR electrolytic capacitors between 220uFand 1500uF
provide best results.
B. The capacitors voltage rating should be at least 1.5 times
greater than the output voltage, and often much higher
voltage rating is needed to satisfy low ESR requirement
5. Output Capacitor Selection (Cout)
A. In this example is recommended Nichicon PM
capacitors: 470 mF/35 V or 220 mF/35 V
6. Feedforward Capacitor (CFF)
It provides additional stability mainly for higher input voltages. For
Cff selection use Table 1. The compensation capacitor between
0.6 nF and 40 nF is wired in parallel with the output voltage setting
resistor R2, The capacitor type can be ceramic, plastic, etc..
6. Feedforward Capacitor (CFF)
In this example is recommended feedforward capacitor
15 nF or 5 nF.


Numéro de pièce similaire - LM2596

FabricantNo de pièceFiches techniqueDescription
logo
National Semiconductor ...
LM2596 NSC-LM2596 Datasheet
736Kb / 31P
   SIMPLE SWITCHER Power Converter 150 kHz 3A Step-Down Voltage Regulator
logo
Guangdong Youtai Semico...
LM2596 UMW-LM2596 Datasheet
3Mb / 17P
   3A Step-Down Voltage Regulator
logo
List of Unclassifed Man...
LM2596 ETC1-LM2596 Datasheet
693Kb / 11P
   3.0A, 150Khz, Step-Down Switching Regulator
logo
Estek Electronics Co. L...
LM2596 ESTEK-LM2596 Datasheet
387Kb / 12P
   Simple high-efficiency step-down (buck) regulator
logo
First Components Intern...
LM2596 FCI-LM2596 Datasheet
1Mb / 14P
   Simple switcher Power Converter 150kHz Simple switcher Power Converter 150kHz
More results

Description similaire - LM2596

FabricantNo de pièceFiches techniqueDescription
logo
ON Semiconductor
LM2596 ONSEMI-LM2596_10 Datasheet
455Kb / 25P
   3.0 A, Step-Down Switching Regulator
November, 2008 ??Rev. 0
logo
IK Semicon Co., Ltd
IL2576-XX IKSEMICON-IL2576-XX Datasheet
612Kb / 10P
   3.0 A, 15 V, Step-Down Switching Regulator
logo
ON Semiconductor
NCP3123 ONSEMI-NCP3123 Datasheet
2Mb / 41P
   Dual 3.0 A, Step-Down DC/DC Switching Regulator
October, 2008 ??Rev. 1
NCP3121 ONSEMI-NCP3121 Datasheet
2Mb / 41P
   Dual 3.0 A, Step-Down DC/DC Switching Regulator
October, 2008 ??Rev. 1
logo
STMicroelectronics
L7981ATR STMICROELECTRONICS-L7981ATR Datasheet
1Mb / 44P
   3 A step-down switching regulator
L5981 STMICROELECTRONICS-L5981_08 Datasheet
872Kb / 37P
   1 A step-down switching regulator
L5986 STMICROELECTRONICS-L5986 Datasheet
1Mb / 39P
   2.5 A step-down switching regulator
L5987 STMICROELECTRONICS-L5987 Datasheet
1Mb / 42P
   3 A step-down switching regulator
logo
ON Semiconductor
LM2594 ONSEMI-LM2594 Datasheet
560Kb / 25P
   0.5 A, Step-Down Switching Regulator
January, 2009 ??Rev. 0
logo
STMicroelectronics
L7986TA STMICROELECTRONICS-L7986TA Datasheet
784Kb / 43P
   3 A step-down switching 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


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
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