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| 型号： | AMIS30621C6217G |
| 厂商： | ON Semiconductor |
| 文件页数： | 13/59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
Position Ranges
A position is coded by using the binary two’s complement format. According to the positioning commands used and to the
chosen stepping mode, the position range will be as shown in the following table.
Table 11. POSITIO N RANGE
Command
Stepping Mode
Half ? stepping
Position Range
? 4096 to +4095
Full Range Excursion
8192 half ? steps
Number of Bits
13
SetPosition
1/4 th
1/8 th
micro ? stepping
micro ? stepping
? 8192 to +8191
? 16384 to +16383
16384 micro ? steps
32768 micro ? steps
14
15
1/16 th
micro ? stepping
? 32768 to +32767
65536 micro ? steps
16
SetPositionShort
Half ? stepping
? 1024 to +1023
2048 half ? steps
11
When using the command SetPosition , although
coded on 16 bits, the position word will have to be shifted to
the left by a certain number of bits, according to the stepping
mode.
Secure Position
A secure position can be programmed. It is coded in
11 ? bits, thus having a lower resolution than normal
positions, as shown in the following table. See also
command GotoSecurePosition and LIN lost
behavior .
Table 12. SECURE POSITION
Stepping Mode
Half ? stepping
Secure Position Resolution
4 half ? steps
1/4 th
micro ? stepping
8 micro ? steps (1/4 th )
1/8 th micro ? stepping
1/16 th micro ? stepping
16 micro ? steps (1/8 th )
32 micro ? steps (1/16 th )
Important
NOTES: The secure position is disabled in case the programmed value is the reserved code “10000000000” (0x400 or most negative
position).
At start up the OTP register is copied in RAM as illustrated below.
SecPos10
SecPos10
SecPos9
SecPos9
SecPos8
SecPos8
SecPos2
SecPos2
SecPos1
SecPos1
SecPos0
SecPos0
RAM
OTP
Shaft
A shaft bit, which can be programmed in OTP or with
command SetMotorParam, defines whether a positive
motion is a clockwise (CW) or counter ? clockwise rotation
? Shaft = 0 ? MOTXP is used as positive pin of the X
coil, while MOTXN is the negative one.
? Shaft = 1 ? opposite situation.
(CCW) (an outer or an inner motion for linear actuators):
STRUCTURAL DESCRIPTION
See also the Block Diagram in Figure 1.
rotor, in unloaded condition, is defined by the ratio of
Stepper Motordriver
The Motor driver receives the control signals from the
control logic. The main features are:
? Two H ? bridges, designed to drive a stepper motor with
two separated coils. Each coil (X and Y) is driven by
one H ? bridge, and the driver controls the currents
?
current flowing in X and Y. The torque of the stepper
motor when unloaded is controlled by the magnitude of
the currents in X and Y.
The control block for the H ? bridges, including the
PWM control, the synchronous rectification and the
internal current sensing circuitry.
flowing through the coils. The rotational position of the
http://onsemi.com
13
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