поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

SB350 датащи(PDF) 9 Page - Fairchild Semiconductor

номер детали SB350
подробное описание детали  Power Switch (FPS?? FSL1x7 to Low- Power Supplies
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  FAIRCHILD [Fairchild Semiconductor]
домашняя страница  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

SB350 датащи(HTML) 9 Page - Fairchild Semiconductor

Back Button SB350 Datasheet HTML 4Page - Fairchild Semiconductor SB350 Datasheet HTML 5Page - Fairchild Semiconductor SB350 Datasheet HTML 6Page - Fairchild Semiconductor SB350 Datasheet HTML 7Page - Fairchild Semiconductor SB350 Datasheet HTML 8Page - Fairchild Semiconductor SB350 Datasheet HTML 9Page - Fairchild Semiconductor SB350 Datasheet HTML 10Page - Fairchild Semiconductor SB350 Datasheet HTML 11Page - Fairchild Semiconductor SB350 Datasheet HTML 12Page - Fairchild Semiconductor  
Zoom Inzoom in Zoom Outzoom out
 9 / 12 page
background image
AN-9719
APPLICATION NOTE
© 2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
Rev. 1.0.0 • 11/2/10
9
One simple and practical way to address this problem is
designing the feedback loop for low input voltage and full-
load condition with enough phase and gain margin. When
the converter operates in CCM, the RHP zero is lowest in
low input voltage and full-load condition. The gain
increases only about 6dB as the operating condition is
changed from the lowest input voltage to the highest input
voltage condition under universal input condition. When the
operating mode changes from CCM to DCM, the RHP zero
disappears, making the system stable. Therefore, by
designing the feedback loop with more than 45 degrees of
phase margin in low input voltage and full-load condition,
the stability over all the operating ranges can be guaranteed.
Figure 15 is a typical feedback circuit mainly consisting of a
shunt regulator and a photo-coupler. R1 and R2 form a
voltage divider for output voltage regulation. RF and CF are
for control-loop compensation. The maximum source
current of the FB pin is about 1mA. The phototransistor
must be capable of sinking this current to pull the FB level
down at no load. The value of RD, is determined by:
·
(23)
where VOPD is the forward-voltage drop of the photodiode
(~1.2V); VKA is the minimum cathode-to-anode voltage of
KA431 (2.5V); and CTR is the current transfer rate of the
opto-coupler.
6V
+
-
Figure 15. Feedback Circuit
The feedback compensation network transfer function of
Figure 15 is obtained as:
·
1
1
(24)
where
,
1
1
(25)
(Design Example)
Assuming CTR is 100%,
·
1 10
110
12
1.2
2.5
110
8.3 Ω
The minimum cathode current for KA431 is 1mA.
1.2 Ω.
1k
Ω resistor is selected for RBIAS.
The voltage divider resistors R1 and R2 should be
designed to provide 2.5V to the reference pin of the
KA431.The relationship between R1 and R2 is given as:
2.5 ·
2.5
2.5 ·
12
2.5
3.8
38.2k
Ω and 10kΩ resistor are selected for R1, R2.
[STEP-11] Design Input Voltage Sensing Circuit
Figure 16 shows a resistive voltage divider with low-pass
filter for line-voltage detection of the VIN pin. FSL-series
devices start and enable the latch function when the VIN
voltage reaches 1.03V. If latch protection is triggered, the
VIN voltage is used for release latch protection as the VIN
voltage drops below 0.7V. It is typical to use 100:1 voltage
divider for VIN level.
Figure 16. Input Voltage Sensing


Аналогичный номер детали - SB350

производительномер деталидатащиподробное описание детали
logo
Pan Jit International I...
SB350 PANJIT-SB350 Datasheet
54Kb / 2P
   3 AMPERE SCHOTTKY BARRIER RECTIFIERS(VOLTAGE - 20 to 100 Volts CURRENT - 3.0 Amperes)
logo
Diotec Semiconductor
SB350 DIOTEC-SB350 Datasheet
93Kb / 2P
   Schottky Barrier Rectifier Diodes
logo
DONGGUAN YOU FENG WEI E...
SB350 YFWDIODE-SB350 Datasheet
74Kb / 2P
   3.0Amp Schottky Barrier Rectifiers
logo
Semikron International
SB350 SEMIKRON-SB350 Datasheet
133Kb / 2P
   Schottky barrier rectifiers diodes
logo
Anderson Power Products...
SB350 APP-SB350 Datasheet
1Mb / 6P
   SB® 350 Connectors Up to 500 Amps
REV C7
More results

Аналогичное описание - SB350

производительномер деталидатащиподробное описание детали
logo
Fairchild Semiconductor
KA5S FAIRCHILD-KA5S_03 Datasheet
213Kb / 16P
   Power Switch(FPS)
KA1M0880D FAIRCHILD-KA1M0880D Datasheet
114Kb / 10P
   Power Switch(FPS)
KA1M0265R FAIRCHILD-KA1M0265R Datasheet
89Kb / 10P
   Fairchild Power Switch(FPS)
KA1M0680B FAIRCHILD-KA1M0680B Datasheet
144Kb / 12P
   Fairchild Power Switch(FPS)
KA5X0165RXX FAIRCHILD-KA5X0165RXX Datasheet
102Kb / 12P
   Fairchild Power Switch(FPS)
FS6X1220R FAIRCHILD-FS6X1220R Datasheet
471Kb / 16P
   Fairchild Power Switch (FPS)
FS6S0965RCB FAIRCHILD-FS6S0965RCB Datasheet
572Kb / 10P
   Fairchild Power Switch(FPS)
KA1M0880BF FAIRCHILD-KA1M0880BF Datasheet
95Kb / 10P
   Fairchild Power Switch(FPS)
KA5Q0740RT FAIRCHILD-KA5Q0740RT_04 Datasheet
292Kb / 12P
   Fairchild Power Switch(FPS)
FS8S0765RCB FAIRCHILD-FS8S0765RCB_06 Datasheet
1Mb / 19P
   Fairchild Power Switch (FPS??
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
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