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

X  

Preview PDF HTML

PM6675 Datasheet(PDF) 33 Page - STMicroelectronics

No. de pieza PM6675
Descripción Electrónicos  Very fast load transient response using constant on-time control loop
PDF  47 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PM6675 Datasheet(HTML) 33 Page - STMicroelectronics

Back Button PM6675 Datasheet HTML 29Page - STMicroelectronics PM6675 Datasheet HTML 30Page - STMicroelectronics PM6675 Datasheet HTML 31Page - STMicroelectronics PM6675 Datasheet HTML 32Page - STMicroelectronics PM6675 Datasheet HTML 33Page - STMicroelectronics PM6675 Datasheet HTML 34Page - STMicroelectronics PM6675 Datasheet HTML 35Page - STMicroelectronics PM6675 Datasheet HTML 36Page - STMicroelectronics PM6675 Datasheet HTML 37Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 33 / 47 page
background image
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
PM6675
Application information
33/47
where
Equation 28a
Equation 28b
Referring to the typical application schematic (figure in cover page and Figure 5), the final
expression is then:
Equation 29
The switching frequency directly affects two parameters:
●
Inductor size: greater frequencies mean smaller inductances. In notebook applications,
real estate solutions (i.e. low-profile power inductors) are mandatory also with high
saturation and r.m.s. currents.
●
Efficiency: switching losses are proportional to the frequency. Generally, higher
frequencies imply lower efficiency.
Even if the switching frequency is theoretically independent from battery and output
voltages, parasitic parameters involved in power path (like MOSFETs' on-resistance and
inductor's DCR) introduce voltage drops responsible for a slight dependence on load
current.
In addition, the internal delay is cause of a light dependence from input voltage.
Table 8. Typical values for switching frequency selection
R1 (k
Ω)R2 (kΩ)
Approx switching frequency (kHz)
330
11
250
330
13
300
330
15
350
330
18
400
330
20
450
330
22
500
IN
OSC
OSC
V
V
=
α
OUT
SNS
OUT
V
V
=
α
OSC
2
1
2
OSC
OSC
SW
K
1
R
R
R
K
f
⋅
+
=
α
=



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


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