Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

Preview PDF HTML

L7985 Datasheet(PDF) 19 Page - STMicroelectronics

No. de pieza L7985
Descripción Electrónicos  Voltage feed-forward
PDF  42 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7985 Datasheet(HTML) 19 Page - STMicroelectronics

Back Button L7985 Datasheet HTML 15Page - STMicroelectronics L7985 Datasheet HTML 16Page - STMicroelectronics L7985 Datasheet HTML 17Page - STMicroelectronics L7985 Datasheet HTML 18Page - STMicroelectronics L7985 Datasheet HTML 19Page - STMicroelectronics L7985 Datasheet HTML 20Page - STMicroelectronics L7985 Datasheet HTML 21Page - STMicroelectronics L7985 Datasheet HTML 22Page - STMicroelectronics L7985 Datasheet HTML 23Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 19 / 42 page
background image
DocID022446 Rev 7
19/42
L7985
Application information
42
In this way the PWM modulator gain results constant and equal to:
Equation 18
The synchronization of the device with an external clock provided through the SYNCH pin
can modify the PWM modulator gain (see Section 5.1 on page 9 to understand how this gain
changes and how to keep it constant in spite of the external synchronization).
Figure 9. The error amplifier, the PWM modulator, and the LC output filter
The transfer function on the LC filter is given by:
Equation 19
where:
Equation 20
Equation 21
GPW0
VIN
Vs
---------
1
K
----
18
==
=
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
GLC s

1
s
2
 f
zESR
--------------------------
+
1
s
2
 Qf
LC
----------------------------
s
2
 f
LC
-------------------

 2
++
-------------------------------------------------------------------------
=
fLC
1
2
LCOUT
1
ESR
ROUT
---------------
+

------------------------------------------------------------------------
=
fzESR
1
2
 ESR C
OUT

--------------------------------------------
=
Q
ROUT LCOUT ROUT ESR
+


LCOUT ROUT ESR

+
------------------------------------------------------------------------------------------
ROUT
VOUT
IOUT
--------------
=
,
=



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


Datasheet Descarga

Go To PDF Page


Enlace URL



¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Enlace a la hoja de datos    |   Intercambio de Enlaces   |   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