參數(shù)資料
型號(hào)： L292
廠商： 意法半導(dǎo)體
英文描述： SWITCH-MODE DRIVER FOR DC MOTORS
中文描述： 開(kāi)關(guān)模式直流電動(dòng)機(jī)驅(qū)動(dòng)
文件頁(yè)數(shù)： 7/12頁(yè)
文件大小： 161K
代理商： L292
Neglecting the VCEsat of the bridge transistors and the VBE of the diodes:
G
mo
=
1
R
M
2
V
s
V
R
where
: V
S
= supply voltage (1)
V
R
= 8 V (reference voltage)
DC TRANSFER FUNCTION
In order to be sure that the current loop is stable the following condition is imposed :
1 + sRC = 1 + s L
M
R
M
(pole cancellation) (2)
from which RC = L
M
R
M
(Note that in practice R must greater than 5.6 K
)
The transfer function is then,
I
M
V
I
(
s
)
=
R
2
R
4
R
1
R
3
G
mo
1
+
s R
F
C
F
G
mo
R
s
+
s R
4
C
+
s
2
R
F
C
F
R
4
C
(3)
In DC condition, this is reduced to
I
M
V
I
(
o
)
=
R
2
R
4
R
1
R
3
1
R
s
=
0.044
R
s
[
A
V
] (4)
OPEN-LOOP GAIN AND STABILITY CRITERION
For RC = L
M
/ R
M
, the open loop gain is:
A
β
=
1
sR subF C
G
mo
R
s
R
4
R
F
1
+
s
R
F
C
F
=
G
mo
R
s
R
4
C
1
s
(
1
+
s
R
F
C
F
)
(5)
In order to achieve good stability, the phase margin must be greater than 45
°
when | A
β
| = 1.
1
2
π
R
F
C
F
That means that, at f
F
=
must be | A
β
| < 1 (see fig. 7), that is :
| A
β
| f =
1
2
π
R
F
C
F
=
G
mo
R
s
R
4
C
R
F
C
F
√
2
<
1
(6)
Figure 7. Open Loop Frequency Response
7/12
L292
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L292 制造商:STMicroelectronics 功能描述:IC SWITCH MODE DRIVER 292
L292_03 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SWITCH-MODE DRIVER FOR DC MOTORS
L292B 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
L292H 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 DC Switch-Mode RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類型:2 Phase Stepper Motor Driver 工作電源電壓:8 V to 45 V 電源電流:0.5 mA 工作溫度:- 25 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
L293 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PUSH-PULL FOUR CHANNEL DRIVER WITH DIODES
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