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参数资料
| 型号： | L6227Q |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSH DC MOTOR CONTROLLER, 2.8 A, QCC32 |
| 封装： | 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32 |
| 文件页数： | 6/27页 |
| 文件大小： | 435K |
| 代理商： | L6227Q |
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Circuit description
L6227Q
14/27
These values allow a sufficient range of tOFF to implement the drive circuit for most motors.
The capacitor value chosen for COFF also affects the rise time tRCRISE of the voltage at the
pin RCOFF. The rise time tRCRISE will only be an issue if the capacitor is not completely
charged before the next time the monostable is triggered. Therefore, the on time tON, which
depends by motors and supply parameters, has to be bigger than tRCRISE for allowing a
good current regulation by the PWM stage. Furthermore, the on time tON can not be smaller
than the minimum on time tON(MIN).
tRCRISE = 600 COFF
current regulation capacity. It has to be said that t
ON is always bigger than t
ON(MIN) because
the device imposes this condition, but it can be smaller than tRCRISE - tDT. In this last case
the device continues to work but the off time tOFF is not more constant.
So, small COFF value gives more flexibility for the applications (allows smaller on time and,
therefore, higher switching frequency), but, the smaller is the value for COFF, the more
influential will be the noises on the circuit performance.
Figure 11.
tOFF versus COFF and ROFF
t
ON
t
ON MIN
()
>
2.5
s
=
t
ON
t
TCRISE
t
DT
–
W
+
>
0.1
1
10
100
1
10
100
1.10
3
1.10
4
Coff [nF]
toff
[
s]
Roff = 100k
Roff = 47k
Roff = 20k
相关PDF资料 |
PDF描述 |
|---|---|
| L6228D | STEPPER MOTOR CONTROLLER, 2.8 A, PDSO24 |
| L6228N | STEPPER MOTOR CONTROLLER, 2.8 A, PDIP24 |
| L6229QTR | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, QCC32 |
| L6229Q | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, QCC32 |
| L6230PDTR | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO36 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| L6227Q_09 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:DMOS dual full bridge driver with PWM current controller |
| L6227QTR | 功能描述:功率驱动器IC DMOS DUAL FULL Bridge w/ PWM RoHS:否 制造商:Micrel 产品:MOSFET Gate Drivers 类型:Low Cost High or Low Side MOSFET Driver 上升时间: 下降时间: 电源电压-最大:30 V 电源电压-最小:2.75 V 电源电流: 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| L6228 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:DMOS DRIVER FOR BIPOLAR STEPPER MOTOR |
| L6228D | 功能描述:马达/运动/点火控制器和驱动器 DMOS Stepper Motor 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 |
| L6228DTR | 功能描述:马达/运动/点火控制器和驱动器 DMOS Stepper Motor 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 |
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