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参数资料
| 型号： | L6258 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | STEPPER MOTOR CONTROLLER, 1.5 A, PDSO36 |
| 封装： | ROHS COMPLIANT, SOP-36 |
| 文件页数： | 11/32页 |
| 文件大小： | 364K |
| 代理商： | L6258 |
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L6258
PWM current control loop
Doc ID 4588 Rev 10
19/32
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| L6258_07 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258A | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Stepper Motor Controller/Driver |
| L6258E | 功能描述:马达/运动/点火控制器和驱动器 Dual Full Bridge 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 |
| L6258E_07 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
| L6258EA | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:PWM controlled high current DMOS universal motor driver |
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