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参数资料
| 型号： | L292 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 2.5 A, PZFM15 |
| 封装： | MULTIWATT-15 |
| 文件页数： | 2/13页 |
| 文件大小： | 205K |
| 代理商： | L292 |
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Product(s)
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Product(s)
L292
10/13
Figure 8. Small Signal Step Response (normalized amplitude vs. t / RFCF).
V7 = 200 mV/div.
IM = 100 mA/div.
t = 100
s/div. with VI = 1.5 Vp.
It is possible to verify that the L292 works in "closed-loop" conditions during the entire motor current rise-
time: the voltage at pin 7 inverting input of the error amplifier) is locked to the reference voltage VR,
present at the non-inverting input of the same amplifier.
The previous linear analysis is correct for this example.
Descresing the
ξ value, the rise-time of the current decreases. But for a good stability, from relationship
(6), the maximum value of
ξ is:
(phase margin = 45°)
b) Large signal reponse
The large step signal response is limited by slew-rate and inductive load.
In this case, during the rise-time of the motor current, The L292 works is open-loop condition.
CLOSED LOOP SYSTEM BANDWIDTH.
A good choice for x is the value 1 / 2. In this case :
(8)
The module of the transfer function is :
(9)
The cutoff frequency is derived by the expression (9) by putting
= 0.707
(-3 dB), from which:
ξmin
1
2
4
2
--------------
=
I
M
V
I
----- s
()
0.044
R
s
---------------
1sR
F CF
+
12s R
F CF
2s
2
R
F
2
C
F
2
++
----------------------------------------------------------------------
=
I
M
V
I
-----
0.044
R
s
---------------
21
ω
2
R
F
2
C
F
2
+
12
ωR
F CF
+
()
2
1
+
[]
12
–
ωR
FCF
()
2
1
+
[]
----------------------------------------------------------------------------------------------------------------------
=
I
M
V
I
-----
0.044
R
s
---------------
ω
T
0.9
R
F CF
---------------
f
T
0.9
2
πR
F CF
-----------------------
==
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相关代理商/技术参数 |
参数描述 |
|---|---|
| L292 | 制造商:STMicroelectronics 功能描述:IC SWITCH MODE DRIVER 292 |
| L292_03 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:SWITCH-MODE DRIVER FOR DC MOTORS |
| L292B | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| L292H | 功能描述:马达/运动/点火控制器和驱动器 DC Switch-Mode RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube |
| L293 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:PUSH-PULL FOUR CHANNEL DRIVER WITH DIODES |
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