Zakładka z wyszukiwarką danych komponentów
  Polish  ▼
ALLDATASHEET.PL

X  

KA3903 Arkusz danych(PDF) 8 Page - Fairchild Semiconductor

Numer części KA3903
Szczegółowy opis  Power Window Motor Control IC
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA3903 Arkusz danych(HTML) 8 Page - Fairchild Semiconductor

Back Button KA3903 Datasheet HTML 4Page - Fairchild Semiconductor KA3903 Datasheet HTML 5Page - Fairchild Semiconductor KA3903 Datasheet HTML 6Page - Fairchild Semiconductor KA3903 Datasheet HTML 7Page - Fairchild Semiconductor KA3903 Datasheet HTML 8Page - Fairchild Semiconductor KA3903 Datasheet HTML 9Page - Fairchild Semiconductor KA3903 Datasheet HTML 10Page - Fairchild Semiconductor KA3903 Datasheet HTML 11Page - Fairchild Semiconductor KA3903 Datasheet HTML 12Page - Fairchild Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 8 / 16 page
background image
FAN8903(KA3903)
8
Over Current Protection
Simple Applications
The voltage (Vrs) proportional to the motor current is generated across the resistor (RS). If the Vrs exceeds the reference volt-
age (Vref), over current part-time integration carried out through R3, C2 and OP-amp.
When the amount of over current integration is lager than S2, the over current signal issued.
The cancel time (TC) between motor stall and motor switch-off is determined by following equations;
You can adjust both the value of the sensing resistor (RS) according to motor type and the cancel time by
changing R3 and
C2. Additionally the over current detection of the FAN8903 is immune to any sudden peak
current or a current slightly lager
than the reference current.
Temperature Compensation Applications
Generally speaking, the less ambient temperature, the more motor current. In the previous applications, there are some diffi-
culties to decide the reference current level.
In case of low ambient temperature, the difference between the operating motor current and the reference current is very small.
When the reference current level is high, the margin is large. But at a high ambient temperature, the difference between the
motor current and the stall current is small.
Moreover, the stall current at depends on a battery voltage. It is hard to decide what the optimal reference level is.
In the following figure, in the room temperature, the inverting voltage (V2) and the reference current are calculated as follows;
The resistance of the NTC decreases according to rising of the ambient temperature. So the reference level, Vcom is changed
with the temperature change as shown in the following figure.
To ensure precision of the reference level, Rt can be adjusted.
T
C
C2
dV
×
() I
C
=
where I
C
Vrs
Vref
() R3
=
,
dV
Vouth
0.8
=
+
FAN8903
OP-amp
Vref
OCP
0.8V
C2
474
R3
47k
RS
20m
Vrs
MOTOR
+
6
7
Vro
OCP
Vro
Vref
S1
S2
Vrs
V2
Vcom
R3
Rntc
Rt
R3
++
()
×
=
Vcom
Vref
V2
=


Podobny numer części - KA3903

ProducentNumer częściArkusz danychSzczegółowy opis
logo
Fairchild Semiconductor
KA3902 FAIRCHILD-KA3902 Datasheet
127Kb / 14P
   DC FAN Motor Controller
More results

Podobny opis - KA3903

ProducentNumer częściArkusz danychSzczegółowy opis
logo
List of Unclassifed Man...
MCX304 ETC-MCX304 Datasheet
137Kb / 4P
   MOTOR CONTROL IC
logo
Guangdong Youtai Semico...
L9110S UMW-L9110S Datasheet
521Kb / 5P
   Motor control driver IC
logo
International Rectifier
IRMCK341 IRF-IRMCK341_15 Datasheet
642Kb / 36P
   Sensorless Motor Control IC
IRMCK371 IRF-IRMCK371_15 Datasheet
562Kb / 33P
   Sensorless Motor Control IC
IRMCK343 IRF-IRMCK343_15 Datasheet
659Kb / 35P
   Sensorless Motor Control IC
logo
Panasonic Semiconductor
AN8290S PANASONIC-AN8290S Datasheet
545Kb / 5P
   IC for Spindle Motor Control
logo
Renesas Technology Corp
RAJ306000GFT RENESAS-RAJ306000GFT Datasheet
1Mb / 26P
   General purpose Motor control IC
10-Oct/2017
RAJ306001 RENESAS-RAJ306001 Datasheet
640Kb / 27P
   General-Purpose Motor Control IC
Mar 24, 2021
logo
Infineon Technologies A...
IRMCK099 INFINEON-IRMCK099 Datasheet
1Mb / 31P
   iMOTION??motor control IC for single motor drive
Revision 1.0 2014-12-18
logo
Fairchild Semiconductor
KA3050 FAIRCHILD-KA3050 Datasheet
199Kb / 22P
   Camera Motor Drive and Control IC
More results


Html Pages

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


Arkusz danych Pobierz

Go To PDF Page


Link URL




Polityka prywatności
ALLDATASHEET.PL
Czy Alldatasheet okazała się pomocna?  [ DONATE ] 

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Linki   |   Lista producentów
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