поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

LT3579 датащи(PDF) 19 Page - Linear Technology

номер детали LT3579
подробное описание детали  6A Boost/Inverting DC/DC Converter with Fault Protection
PDF  40 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  LINER [Linear Technology]
домашняя страница  http://www.linear.com
Logo LINER - Linear Technology

LT3579 датащи(HTML) 19 Page - Linear Technology

Back Button LT3579 Datasheet HTML 15Page - Linear Technology LT3579 Datasheet HTML 16Page - Linear Technology LT3579 Datasheet HTML 17Page - Linear Technology LT3579 Datasheet HTML 18Page - Linear Technology LT3579 Datasheet HTML 19Page - Linear Technology LT3579 Datasheet HTML 20Page - Linear Technology LT3579 Datasheet HTML 21Page - Linear Technology LT3579 Datasheet HTML 22Page - Linear Technology LT3579 Datasheet HTML 23Page - Linear Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 19 / 40 page
background image
LT3579/LT3579-1
19
35791f
Table 4. Boost Power Calculations Example with VIN = 5V, VOUT = 12V, IOUT = 1.5A, fOSC = 1MHz, VD = 0.5V, VCESAT = 0.185V
DEFINITION OF VARIABLES
EQUATIONS
DESIGN EXAMPLE
VALUE
DC = Switch Duty Cycle
DC
VV
V
VV
V
OUT
IN
D
OUT
D
CESAT
=
+
+
–
–
DC
VV
V
VV
V
=
+
+
12
5
0 5
12
0 5
185
–.
.– .
DC = 60.9%
IIN = Average Input Current
η = Power Conversion Efficiency
(typically 90% at high currents)
I
VI
V
IN
OUT
OUT
IN
=
•
• η
I
VA
V
IN =
•
•
12
1 5
50 9
.
.
IIN = 4A
PSW = Switch I2R Loss
RSW = Switch Resistance (typically
45mΩ combined SW1 and SW2)
PDC I
R
SW
IN
SW
=•
•
2
PA
m
SW =•
•
0 609
4
45
2
.(
)
Ω
PSW = 438mW
PBAC = Base Drive Loss (AC)
Pns I
V
f
BAC
IN
OUT
OSC
=•
•
•
13
P
ns
A
V
MHz
BAC =•
•
•
13
4121
PBAC = 624mW
PBDC = Base Drive Loss (DC)
P
VI
DC
BDC
IN
IN
=
••
40
P
VA
BDC =
••
5
4
0 609
40
.
PBDC = 305mW
PINP = Input Power Loss
PmA V
INP
IN
=•
14
P
mA
V
INP =•
14
5
PINP = 70mW
PTOTAL = 1.437W
APPLICATIONS INFORMATION
The following example calculates the power dissipation
in the LT3579 for a particular boost application:
(VIN = 5V, VOUT = 12V, IOUT = 1.5A, fOSC = 1MHz,
VD = 0.5V, VCESAT = 0.185V).
To calculate die junction temperature, use the appropriate
thermal resistance number and add in worst-case ambient
temperature:
TJ = TA + θJA • PTOTAL
where TJ=Die Junction Temperature, TA=Ambient
Temperature, PTOTAL is the final result from the calculations
shown in Table 4, and θJA is the thermal resistance from
the silicon junction to the ambient air.



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 38 39 40


датащи скачать

Go To PDF Page


ссылки URL



Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   Ссылка на техническое описание    |   обмен ссыками   |   поиск по производителю
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