Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

Preview PDF HTML

L5987 Folha de dados(PDF) 21 Page - STMicroelectronics

Nome de Peças L5987
Descrição Electrónicos  3 A step-down switching regulator
PDF  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  STMICROELECTRONICS [STMicroelectronics]
Página de início  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L5987 Folha de dados(HTML) 21 Page - STMicroelectronics

Back Button L5987 Datasheet HTML 17Page - STMicroelectronics L5987 Datasheet HTML 18Page - STMicroelectronics L5987 Datasheet HTML 19Page - STMicroelectronics L5987 Datasheet HTML 20Page - STMicroelectronics L5987 Datasheet HTML 21Page - STMicroelectronics L5987 Datasheet HTML 22Page - STMicroelectronics L5987 Datasheet HTML 23Page - STMicroelectronics L5987 Datasheet HTML 24Page - STMicroelectronics L5987 Datasheet HTML 25Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 21 / 42 page
background image
L5987 - L5987A
Application information
21/42
Figure 9.
The error amplifier, the PWM modulation and the LC output filter
The transfer function on the LC filter is given by:
Equation 17
where:
Equation 18
Equation 19
As seen in Chapter 5.3 two different kind of network can compensate the loop. In the two
following paragraph the guidelines to select the Type II and Type III compensation network
are illustrated.
FB
COMP
V
REF
E/A
PWM
V
S
OUT
V
CC
C
OUT
ESR
L
G
PW0
G
LC
FB
COMP
V
REF
E/A
PWM
V
S
OUT
V
CC
C
OUT
ESR
L
G
PW0
G
LC
G
LC s
()
1
s
2
π f
zESR
⋅
--------------------------
+
1
s
2
π Qf
⋅
LC
⋅
----------------------------
s
2
π f
LC
⋅
-------------------
⎝⎠
⎛⎞ 2
++
-------------------------------------------------------------------------
=
f
LC
1
2
π
LC
OUT
⋅
1
ESR
R
OUT
---------------
+
⋅⋅
------------------------------------------------------------------------
=
f
zESR
1
2
π ESR C
OUT
⋅⋅
--------------------------------------------
=
,
Q
R
OUT
LC
OUT
R
OUT
ESR
+
()
⋅⋅
⋅
LC
OUT
R
OUT
ESR
⋅⋅
+
------------------------------------------------------------------------------------------
R
OUT
V
OUT
I
OUT
--------------
=
,
=



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 41 42


Folha de dados Download

Go To PDF Page


Ligação URL



ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   Link para a ficha técnica    |   roca de Link   |   Lista de Fabricantes
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