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參數(shù)資料
| 型號： | L6258E |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 運動控制電子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1.5 A, PDSO36 |
| 封裝： | ROHS COMPLIANT, SOP-36 |
| 文件頁數(shù)： | 11/31頁 |
| 文件大?。?/td> | 360K |
| 代理商： | L6258E |
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L6258E
PWM current control loop
Doc ID 8688 Rev 9
19/31
Before analysing the error amplifier block and the sense transconductance block, we have to
do this consideration:
AloopdB = AxdB + BxdB
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 7.
Ax bode plot
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 order to increment the total open loop gain increasing the bandwidth too.
3.4
Error amplifier and sense amplifier
As explained before the gain of these two blocks is:
BxdB = ACerrdB + ACsensedB
Being the voltage across the sense resistor the input of the Bx block and the error amplifier
voltage the output of the same, the voltage gain is given by:
ib
Vsense
Gs
Vsense
1
Rb
--------
==
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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:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EA | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EP_07 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EX | 功能描述:馬達/運動/點火控制器和驅(qū)動器 1.5A Stepper 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 安裝風格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube |
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