TDA7274 데이터 시트보기 (PDF) - STMicroelectronics
부품명
상세내역
제조사
TDA7274 Datasheet PDF : 10 Pages
| |||
Figure 15 : Speed Variations vs.
Ambient Temperature.
TDA7274
APPLICATION INFORMATION
Figure 16.
IM = Motor current at rated speed
RM = Motor resistance
Eg = Back electromotive force
VM = IM .RM + Eg
Eg
=
RT
Id
+
IM
RKT
−
RM
+
Vref
1
+
RB
RS
+
RT
RS
(1
+
K1 )
RS has to be adjusted so that the applied voltage
VM is suitable for a given motor, the speed is then
linearly adjustable varing RB.
The value of RT is calculated so that
RT (max.) < K (min.) •. RM (min.)
If RT (max.) > K • RM, instability may occur.
The values of C1 (4.7 µF typ.) and C2 (1 µF typ.)
depend on the type of motor used. C1 adjusts
WOW and flutter of the system. C2 suppresses
motor spikes.
7/10
Share Link: 