參數(shù)資料
型號(hào)： AMIS-30621-AGA
元件分類： 運(yùn)動(dòng)控制電子
英文描述： STEPPER MOTOR CONTROLLER, 0.8 A, PDSO20
封裝： 300 INCH, PLASTIC, SOIC-20
文件頁數(shù)： 27/57頁
文件大小： 1017K
代理商： AMIS-30621-AGA
AMIS-30621 LIN Micro-stepping Motor Driver
Data Sheet
33
AMI Semiconductor
– Sept. 2007, Rev 1.5
www.amis.com
output current to an internal reference, and features a digital regulation generating the PWM signal that drives the output switches. The
zoom over one micro-step in the Figure 21 shows how the PWM circuit performs this regulation.
14.3.3. Motor Starting Phase
At motion start, the currents in the coils are directly switched from Ihold to Irun with a new sine/cosine ratio corresponding to the first
half (or micro) step of the motion.
14.3.4. Motor Stopping Phase
At the end of the deceleration phase, the currents are maintained in the coils at their actual DC level (hence keeping the sine/cosine
ratio between coils) during the stabilization time tstab equal to 1/4
th of an electrical period at the Vmin velocity. The currents are then set
to the hold values, respectively Ihold x sin(TagPos) and Ihold x cos(TagPos) as illustrated below. A new positioning order can then
be executed.
Figure 21: Motor Stopping Phase
14.3.5. Charge Pump Monitoring
If the charge pump voltage is not sufficient for driving the high side transistors (due to a failure), an internal HardStop command is
issued. This is acknowledged to the master by raising flag <CPFail> (available with command GetFullStatus). In case this failure
occurs while a motion is ongoing, the flag <StepLoss> is also raised.
14.3.6. Electrical Defect on Coils, Detection and Confirmation
The principle relies on the detection of a voltage drop on at least one transistor of the H-bridge. Then the decision is taken to open the
transistors of the defective bridge. This allows detecting the following short circuits:
External coil short circuit
Short between one terminal of the coil and Vbat or Gnd
One cannot detect internal short in the motor
Open circuits are detected by 100 percent PWM duty cycle value during a long time.
t
Ix
Iy
t
stab
PC20070303.6
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AMIS30621C6213RG 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 LIN STEPPER DRIVER 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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
AMIS30621C6216G 功能描述:馬達(dá)/運(yùn)動(dòng)/點(diǎn)火控制器和驅(qū)動(dòng)器 LIN STEPPER DRIVER 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(fēng)格:SMD/SMT 封裝 / 箱體:HTSSOP-28 封裝:Tube
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