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

X  

Preview PDF HTML

APW7165C Datasheet(PDF) 13 Page - Anpec Electronics Coropration

No. de pieza APW7165C
Descripción Electrónicos  5V to 12V Synchronous Buck Controller
PDF  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  ANPEC [Anpec Electronics Coropration]
Página de inicio  http://www.anpec.com.tw
Logo ANPEC - Anpec Electronics Coropration

APW7165C Datasheet(HTML) 13 Page - Anpec Electronics Coropration

Back Button APW7165C Datasheet HTML 9Page - Anpec Electronics Coropration APW7165C Datasheet HTML 10Page - Anpec Electronics Coropration APW7165C Datasheet HTML 11Page - Anpec Electronics Coropration APW7165C Datasheet HTML 12Page - Anpec Electronics Coropration APW7165C Datasheet HTML 13Page - Anpec Electronics Coropration APW7165C Datasheet HTML 14Page - Anpec Electronics Coropration APW7165C Datasheet HTML 15Page - Anpec Electronics Coropration APW7165C Datasheet HTML 16Page - Anpec Electronics Coropration APW7165C Datasheet HTML 17Page - Anpec Electronics Coropration Next Button
Zoom Inzoom in Zoom Outzoom out
 13 / 20 page
background image
Copyright
© ANPEC Electronics Corp.
Rev. A.2 - Oct., 2012
APW7165C
www.anpec.com.tw
13
Application Information (Cont.)
Figure 3. The LC Filter Gain & Frequency
The PWM modulator is shown in Figure 4. The input is
the output of the error amplifier and the output is the PHASE
node. The transfer function of the PWM modulator is given
by:
Figure 4. The PWM Modulator
The compensation circuit is shown in Figure 5. R3 and
C1 introduce a zero and C2 introduces a pole to reduce
the switching noise. The transfer function of error ampli-
fier is given by:
The pole and zero of the compensation network are:
Compensation (Cont.)
Figure 5. Compensation Network
The closed loop gain of the converter can be written as:
Figure 6 shows the converter gain and the following guide-
lines will help to design the compensation network.
1.Select the desired zero crossover frequency F
O:
(1/5 ~ 1/10) x F
SW >FO>FZ
Use the following equation to calculate R3:
F
ESR
F
LC
Frequency
-40dB/dec
-20dB/dec
Gain
V
OSC
PWM
Comparator
Driver
Driver
Output of
Error
Amplifier
V
IN
PHASE
gm
F
R2
R2
R1
2
F
F
V
V
R3
O
LC
ESR
IN
OSC
×
+
×
×
∆
=
Figure 2. The Output LC Filter
L
C
OUT
ESR
Output
PHASE
OSC
IN
PWM
V
V
=
GAIN
∆
C2
C2
C1
R3
C2
C1
s
s
C1
R3
1
s
gm
×
×
×
+
+
×
×
+
×
=






+
×
=
×
=
sC2
1
//
sC1
1
R3
gm
gm
O
AMP
Z
GAIN
C2
C1
C2
C1
R3
2
1
+
×
×
×
π
×
P
F
C1
R3
2
1
×
×
π
×
=
FZ
C2
V
OUT
R2
R1
R3
Error
Amplifier
V
REF
C1
COMP
FB
-
+
AMP
PWM
LC
GAIN
GAIN
GAIN
×
×
×
+ R2
R1
R2
Where:
gm = 667
µA/V



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


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