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参数资料
| 型号： | L6229PD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 运动控制电子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 2.8 A, PDSO36 |
| 封装： | SOP-36 |
| 文件页数： | 6/25页 |
| 文件大小： | 628K |
| 代理商： | L6229PD |
L6229
14/25
Figure 16. 60° Hall Sensor Sequence.
3.6 TACHO
A tachometer function consists of a monostable, with constant off time (tPULSE), whose input is one Hall Effect
signal (H1). It allows developing an easy speed control loop by using an external op amp, as shown in Figure
18. For component values refer to Application Information section.
The monostable output drives an open drain output pin (TACHO). At each rising edge of the Hall Effect Sensors
H1, the monostable is triggered and the MOSFET connected to pin TACHO is turned off for a constant time
tPULSE (see Figure 17). The off time tPULSE can be set using the external RC network (RPUL, CPUL) connected
to the pin RCPULSE. Figure 19 gives the relation between tPULSE and CPUL, RPUL. We have approximately:
tPULSE = 0.6 RPUL CPUL
where CPUL should be chosen in the range 1nF … 100nF and RPUL in the range 20K
… 100K.
By connecting the tachometer pin to an external pull-up resistor, the output signal average value VM is propor-
tional to the frequency of the Hall Effect signal and, therefore, to the motor speed. This realizes a simple Fre-
quency-to-Voltage Converter. An op amp, configured as an integrator, filters the signal and compares it with a
reference voltage VREF, which sets the speed of the motor.
Figure 17. Tacho Operation Waveforms.
H1
H2
H3
H1
H3
H2
1
2
3b
4
5
6b
= H
= L
V
M
t
PULSE
T
------------------ V
DD
=
T
t PULSE
H1
VTACHO
H2
H3
VM
VDD
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相关代理商/技术参数 |
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|---|---|
| L6229PDTR | 功能描述:马达/运动/点火控制器和驱动器 3-Phase DC 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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| L6229QTR | 功能描述:马达/运动/点火控制器和驱动器 DMOS driver 3-phrase DC 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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| L622-DBC | 制造商:未知厂家 制造商全称:未知厂家 功能描述:L series PRTDs, type L 622 DBC are designed for large volume applications where longterm stability |
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