поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

Preview PDF HTML

AN938 датащи(PDF) 29 Page - STMicroelectronics

номер детали AN938
подробное описание детали  The L4973 family is a 3.5 A monolithic DC-DC converter
PDF  33 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN938 датащи(HTML) 29 Page - STMicroelectronics

Back Button AN938 Datasheet HTML 25Page - STMicroelectronics AN938 Datasheet HTML 26Page - STMicroelectronics AN938 Datasheet HTML 27Page - STMicroelectronics AN938 Datasheet HTML 28Page - STMicroelectronics AN938 Datasheet HTML 29Page - STMicroelectronics AN938 Datasheet HTML 30Page - STMicroelectronics AN938 Datasheet HTML 31Page - STMicroelectronics AN938 Datasheet HTML 32Page - STMicroelectronics AN938 Datasheet HTML 33Page - STMicroelectronics  
Zoom Inzoom in Zoom Outzoom out
 29 / 33 page
background image
AN938
Applications
Doc ID 5410 Rev 10
29/33
Figure 39.
Design example for 70 V input supply
4.3
Buck-boost converter
This topology is useful to stabilize an output voltage higher, equal or lower than the input
supply. Figure 40 shows the schematic diagram of a converter designed for 12 V, Iout = 3.5 ×
(1-D), with an input supply ranging from 8 V to 55 V.
The 20 V Zener connected to the gate-source of the power MOSFET is for protection
purposes when the supply voltage is higher than 20 V.
Such a circuit, asymmetrical half-bridge, is fully protected from output short-circuit, by
turning off the on-board floating mos.
Figure 40.
Up/down converter
AM03521v1
L4973
VCC 50-70V
5V
Q
CBOOT
CIN
R
CZ
DZ
CSS
CREF
RRE
D
COUT
CC
CO
CIN1
2,3
9
7,8
12
11
16
17
IO=3.5A
AM03522v1
L4973
8V<Vi<55V
150
μH
Vo=12V/1.4A
2,3
9
220nF
47K
1000
μF
1.2nF
1.2
μF
11
Rcomp
Ccomp
Dz
20V
56nF
2.330
μF
ESR
<50m
Ω
12
11
12K
4.7K
STPS5L60
4,5,6
13,14,15
17
1



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


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