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參數(shù)資料
| 型號(hào)： | TDA7274 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 0.7 A, PDIP8 |
| 封裝： | MINI, DIP-8 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 970K |
| 代理商： | TDA7274 |
Figure 15 : Speed Variations vs.
Ambient Temperature.
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
RT
K
RM
+ Vref
1
+
RB
RS
+
RT
RS
(1 +
1
K
)
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
F typ.) and C2 (1 F typ.)
depend on the type of motor used. C1 adjusts
WOW and flutter of the system. C2 suppresses
motor spikes.
TDA7274
7/10
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