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參數(shù)資料
| 型號： | L6258EX |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | PWM CONTROLLED - HIGH CURRENT DMOS UNIVERSAL MOTOR DRIVER |
| 中文描述： | PWM控制-大電流DMOS的通用型電機驅(qū)動 |
| 文件頁數(shù)： | 13/24頁 |
| 文件大小： | 216K |
| 代理商： | L6258EX |
13/24
L6258E
so the gain of this block is:
where:
R
L
= equivalent resistance of the motor winding
R
S
= sense resistor
Because of the inductance of the motor L
L
, the load has a pole at the frequency :
Before analysing the error amplifier block and the sense transconductance block, we have to do this consider-
ation :
Aloop
dB
= Ax
dB
+ Bx
dB
Ax|
dB
= ACpw|
dB
+ ACload|
dB
and
Bx|
dB
= ACerr|
dB
+ ACsense|
dB
this means that Ax|dB is the sum of the power amplifier and load blocks;
Ax|
dB
= (29,5) + (-31.4) = -1.9dB
The BODE analysis of the transfer function of Ax is:
Figure 8.
The Bode plot of the Ax|dB function shows a DC gain of -1.9dB and a pole at 163Hz.
It is clear now that (because of the negative gain of the Ax function), Bx function must have an high DC gain in
ACload
V
v
out
------------------
R
+
R
L
R
S
--------------------
=
=
ACload
dB
20
R
+
R
L
R
S
--------------------
log
=
Aload
dB
20
+
12
0.33
------------------------
log
31.4dB
–
=
=
Fpole
2
π
+
R
L
R
S
--------------------
--------------------------------
=
Fpole
6.28
12
+
3
–
0.33
------------------------
----------------------------------------
163Hz
=
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6258EX_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EXTR | 功能描述:馬達/運動/點火控制器和驅(qū)動器 Hi-Curr Univ Motor 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 |
| L625CME | 制造商:COOPER INDUSTRIES 功能描述:LUFKIN / TAPE,POWER,1"(25MM)X25(8 |
| L625DG | 制造商:LIGHTING COMP DESIGN 功能描述: 制造商:Lighting Components & Design Inc 功能描述: |
| L625DR | 制造商:LIGHTING COMP DESIGN 功能描述: 制造商:Lighting Components & Design Inc 功能描述: |
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