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参数资料
| 型号： | AMIS30621C6217G |
| 厂商： | ON Semiconductor |
| 文件页数： | 32/59页 |
| 文件大小： | 0K |
| 描述： | IC MOTOR STEPPER DVR/CTLR 20SOIC |
| 标准包装： | 38 |
| 应用： | PWM 电机驱动器，步进电机驱动器 |
| 评估套件： | 可供 |
| 输出数： | 1 |
| 电流 - 输出： | 800mA |
| 电压 - 负载： | 6.5 V ~ 29 V |
| 电源电压： | 6.5 V ~ 29 V |
| 工作温度： | -40°C ~ 165°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-SOIC（0.295"，7.50mm 宽） |
| 供应商设备封装： | 20-SOIC |
| 包装： | 管件 |
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AMIS ? 30621
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 t stab (see AC Table). The currents are then
Iy
Ix
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.
t
t stab
Figure 20. Motor Stopping Phase
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.
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 the detection the following short circuits:
? External coil short circuit
? Short between one terminal of the coil and Vbat or
GND
? One cannot detect an internal short in the motor.
Open circuits are detected by 100% PWM duty cycle
value during one electrical period with duration, determined
by Vmin.
Table 22. ELECTRICAL DEFECT DETECTION
Pins Fault mode
Motor Shutdown Mode
A motor shutdown occurs when:
? The chip temperature rises above the thermal shutdown
threshold Ttsd (see Thermal Shutdown Mode).
? The battery voltage goes below UV2 (see Battery
Voltage Management).
? The charge pump voltage goes below the charge pump
comparator level Flag <CPFail> = ‘1’, meaning there is
a charge pump failure.
? Flag < ElDef > = ‘1’, meaning an electrical problem is
detected on one or both coils, e.g. a short circuit.
A motor shutdown leads to the following:
? H ? bridges in high impedance mode.
? The <TagPos> register is loaded with the
<ActPos> .
? The LIN interface remains active, being able to receive
orders or send status.
The conditions to get out of a motor shutdown mode are:
? Reception of a GetStatus or GetFullStatus
command AND
? The four above causes are no longer detected
This leads to H ? bridges going in Ihold mode. Hence, the
circuit is ready to execute any positioning command.
Yi or Xi
Yi or Xi
Yi or Xi
Y1 and Y2
X1 and X2
Xi and Yi
Short circuit to GND
Short circuit to Vbat
Open
Short circuited
Short circuited
Short circuited
This can be illustrated in the following sequence given as an
application example. The master can check whether there is
a problem or not and decide which application strategy to
adopt.
http://onsemi.com
32
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相关代理商/技术参数 |
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| AMIS30621C6217RG | 功能描述:马达/运动/点火控制器和驱动器 LIN STEPPER DRIVER 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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