Moteur de recherche de fiches techniques de composants électroniques
  French  ▼

Delete All
ON OFF
ALLDATASHEET.FR

X  

Preview PDF Download HTML

MB3883 Fiches technique(PDF) 28 Page - Fujitsu Component Limited.

No de pièce MB3883
Description  6-ch DC/DC Converter IC With Synchronous Rectification for voltage step-up and step-down
Download  39 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  FUJITSU [Fujitsu Component Limited.]
Site Internet  http://edevice.fujitsu.com/fmd/en/index.html
Logo FUJITSU - Fujitsu Component Limited.

MB3883 Fiches technique(HTML) 28 Page - Fujitsu Component Limited.

Back Button MB3883 Datasheet HTML 24Page - Fujitsu Component Limited. MB3883 Datasheet HTML 25Page - Fujitsu Component Limited. MB3883 Datasheet HTML 26Page - Fujitsu Component Limited. MB3883 Datasheet HTML 27Page - Fujitsu Component Limited. MB3883 Datasheet HTML 28Page - Fujitsu Component Limited. MB3883 Datasheet HTML 29Page - Fujitsu Component Limited. MB3883 Datasheet HTML 30Page - Fujitsu Component Limited. MB3883 Datasheet HTML 31Page - Fujitsu Component Limited. MB3883 Datasheet HTML 32Page - Fujitsu Component Limited. Next Button
Zoom Inzoom in Zoom Outzoom out
 28 / 39 page
background image
MB3883
28
s
s
s
s SETTING THE DEAD TIME
When the device is set for step-up inverted output based on the step-up or step-up/down Zeta method or flyback
method, the FB pin voltage may reach and exceed the rectangular wave voltage due to load fluctuation. If this
is the case, the output transistor is fixed to a full-ON state (ON duty = 100 %). To prevent this, set the maximum
duty of the output transistor. To set it, set the voltage at the DTC1 terminal (pin 36) by applying a resistive voltage
divider to the VREF voltage as shown below.
When the voltage at the DTC1 terminal (pin 36) is higher than the triangular wave voltage (CT1), the output
transistor is turned on. The maximum duty calculation formula assuming that triangular wave amplitude := 0.7
V and triangular wave minimum voltage := 1.1 V is given below. (Same to other channels.)
When the DTC1 terminal is not used, connect it directly to the VREF terminal (pin 16) as shown below (when
no dead time is set). (Same to other channels.)
When using DTC to set dead time (Same to other channels.) ( CH1)
When no dead time is set ( Same to other channels.) ( CH 1)
DUTY (ON) max :=
Vdt
− 1.1 V
0.7 V
× 100 (%) , Vdt =
Rb
Ra
+ Rb ×
VREF
16
36
VREF
DTC1
Ra
Rb
Vdt
16
36
VREF
DTC1


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 


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   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