參數(shù)資料
型號(hào)： L6258E
廠商： STMICROELECTRONICS
元件分類(lèi)： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 1.5 A, PDSO36
封裝： ROHS COMPLIANT, SOP-36
文件頁(yè)數(shù)： 8/31頁(yè)
文件大?。?/td> 360K
代理商： L6258E
PWM current control loop
L6258E
16/31
Doc ID 8688 Rev 9
3
PWM current control loop
3.1
Open loop transfer function analysis
Block diagram: refer to Figure 5.
Input parameters:
●
VS = 24V
●
LL = 12mH
●
RL = 12Ω
●
RS = 0.33Ω
●
RC = to be calculated
●
CC = to be calculated
●
Gs transconductance gain = 1/Rb
●
Gin transconductance gain = 1/Ra
●
Ampl. of the Tria_0_180 ref. = 1.6V (peak to peak)
●
Ra = 40KΩ
●
Rb = 20KΩ
●
Vr = Internal reference equal to VDD/2 (Typ. 2.5V)
these data refer to a typical application, and will be used as an example during the analysis
of the stability of the current control loop.
The block diagram shows the schematics of the L6258E internal current control loop
working in PWM mode; the current into the load is a function of the input control voltage
VDAC , and the relation between the two variables is given by the following formula:
ILOAD RS GS = VDAC Gin
where:
VDAC
is the control voltage defining the load current value
Gin
is the gain of the input transconductance amplifier ( 1/Ra )
Gs
is the gain of the sense transconductance amplifier ( 1/Rb )
Rs
is the resistor connected in series to the output to sense the load current
In this configuration the input voltage is compared with the feedback voltage coming from
the sense resistor, then the difference between this two signals is amplified by the error
amplifier in order to have an error signal controlling the duty cycle of the output stage
keeping the load current under control.
It is clear that to have a good performance of the current control loop, the error amplifier
must have an high DC gain and a large bandwidth.
I
LOAD
R
S
1
R
b
-------
V
DAC
1
R
a
-------
=
I
LOAD
V
DAC
R
b
R
a
R
s
----------------------
0.5
V
DAC
R
S
--------------- A
()
==
相關(guān)PDF資料
PDF描述
L6275 VOICE COIL MOTOR CONTROLLER, 2.1 A, PQFP44
L6382DTR 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20
L6460TR STEPPER MOTOR CONTROLLER, PQFP64
L6515 BRUSH DC MOTOR CONTROLLER, 0.01 A, PQCC44
L6560AD 0.7 A POWER FACTOR CONTROLLER, PDSO8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
L6258E_07 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
L6258EA 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
L6258EP 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
L6258EP_07 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver
L6258EX 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 1.5A Stepper Motor RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Stepper Motor Controllers / Drivers 類(lèi)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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*