参数资料
型号: A3981KLPTR-T
厂商: Allegro Microsystems Inc
文件页数: 28/43页
文件大小: 0K
描述: IC MOTOR DVR MICROSTEP 28-TSSOP
标准包装: 1
系列: *
应用: *
输出数: *
电流 - 输出: *
电压 - 负载: *
电源电压: *
工作温度: *
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.173",4.40mm 宽)裸露焊盘
供应商设备封装: 28-TSSOP 裸露焊盘
包装: 标准包装
其它名称: 620-1458-6
A3981
Automotive, Programmable Stepper Driver
32/63=50.8% and so on. The value at each Step Angle Number is
then assigned to its corresponding phase table values as follows:
PT ? n ? 1 ? ? DI n
where DI n represents the digitized value of the current at Step
Angle Number n.
A selection of the values and the corresponding phase current
table entries is shown in figure15. The full set of phase current
table values is shown in the table below.
Step
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16
Value 10 20 25 28 29 30 31 32 35 40 50 58 60 62 63 63
PT
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
These 16 values are then loaded sequentially into the phase
current table through the Phase Table Load register of the serial
interface. Each value is then distributed to the appropriate Step
Angle Numbers as described above and as shown in table 4C in
the Phase Table Load Register section.
A representation of the final result is shown in figure 16. This
is the digitized version of the required current profile shown in
figure 14.
Figure 16. Resulting example current profile
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
28
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