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

X  

Preview PDF HTML

PM6675 Fiches technique(PDF) 41 Page - STMicroelectronics

No de pièce PM6675
Description  Very fast load transient response using constant on-time control loop
PDF  47 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM6675 Fiches technique(HTML) 41 Page - STMicroelectronics

Back Button PM6675 Datasheet HTML 37Page - STMicroelectronics PM6675 Datasheet HTML 38Page - STMicroelectronics PM6675 Datasheet HTML 39Page - STMicroelectronics PM6675 Datasheet HTML 40Page - STMicroelectronics PM6675 Datasheet HTML 41Page - STMicroelectronics PM6675 Datasheet HTML 42Page - STMicroelectronics PM6675 Datasheet HTML 43Page - STMicroelectronics PM6675 Datasheet HTML 44Page - STMicroelectronics PM6675 Datasheet HTML 45Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 41 / 47 page
background image
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
PM6675
Application information
41/47
7.1.7
All ceramic capacitors application
Design of external feedback network depends on the output voltage ripple across the output
capacitors' ESR. If the ripple is great enough (at least 20mV), the compensation network
simply consists of a CINT capacitor.
Figure 21. Integrative compensation
The stability of the system firstly depends on the output capacitor zero frequency. It must be
verified that:
Equation 49
where k is a free design parameter greater than unity (k > 3) . It determines the minimum
integrator capacitor value CINT:
Equation 50
If the ripple on the COMP pin is greater than the integrator output dynamic (150mV), an
additional capacitor Cfilt could be added in order to reduce its amplitude. If q is the desired
attenuation factor of the output ripple, select:
CFILT
CINT
RINT
gm
+
-
VREF
VSNS
Ton One-shot
generator
Vr=0.9
V
PWM
Comparator
+
-
COMP
VOUT
Integrator
out
out
Zout
SW
C
R
2
k
f
k
f
⋅
π
=
⋅
>
Vo
Vref
f
k
f
2
g
C
Zout
SW
m
INT
⋅
⎟
⎠
⎞
⎜
⎝
⎛
−
⋅
π
>



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 43 44 45 46 47


Fiches technique Télécharger

Go To PDF Page


Lien URL



ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Lien vers la fiche technique    |   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