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参数资料
| 型号： | A4960KJPTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 29/35页 |
| 文件大小： | 0K |
| 描述： | IC BLDC CTLR BRUSHLESS 32LQFP |
| 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： | 32-LQFP 裸露焊盘 |
| 供应商设备封装： | 32-LQFP（7x7） |
| 包装： | 标准包装 |
| 其它名称： | 620-1452-6 |
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A4960
Serial Register Reference
Automotive, Sensorless BLDC Controller
1 5
1 4
1 3
1 2
1 1
1 0
9
8
7
6
5
4
3
2
1
0
Config 4 (Start Com)
1
0
0
WR
EC3
EC2
EC1
EC0
SC3
SC2
SC1
SC0
1
1
1
1
0
1
0
0
Config 5 (Ramp)
1
0
1
WR
PA3
PA2
PA1
PA0
RQ3
RQ2
RQ1
RQ0
RR3
RR2
RR1
RR0
0 0
*Power on reset value shown below each input register bit.
0
0
1
0
0
0
0
0
0
0
Configuration Register 4
EC[3:0] End Commutation time
t COME = ( n + 1 ) × 0 . 2 ms
where n is a positive integer defined by EC[3:0]
e.g. for the power-on-reset condition
EC[3:0] = [1 1 1 1] then t COME =3.2ms
The range of t COME is 0.2ms to 3.2ms.
The accuracy of t COME is determined by the system clock
frequency as defined in the electrical characteristics table.
SC[3:0] Start commutation time
t COMS = ( n + 1 ) × 8 ms
where n is a positive integer defined by SC[3:0]
e.g. for the power-on-reset condition
SC[3:0] = [0 1 0 0] then t COMS =40ms
The range of is 8ms to 128ms.
The accuracy of t COMS is determined by the system clock
frequency as defined in the electrical characteristics table.
Configuration Register 5
PA[3:0] Phase Advance.
Typically:
θ ADV = n × 1 . 875 ° ( electrical )
where n is a positive integer defined by PA[3:0]
e.g. for the following condition
PA[3:0] = [1 0 0 0] then θ ADV =15°
The range of θ ADV is 0 to 28.125° (electrical)
The accuracy of θ ADV is defined in the electrical
characteristics table.
RQ[3:0] Current sense reference ratio or duty cycle ratio
for torque during forced commutation ramp-up.
If IDS is 0 then RQ[3:0] sets the ramp current.
If IDS is 1 then RQ[3:0] sets the ramp duty cycle.
Typically:
)
V RR = ( n + 1 × 6 . 25 % V REF ........ when IDS =0
D R = ( n + 1 ) × 6 . 25 % ................. when IDS =1
where n is a positive integer defined by RQ[3:0]
e.g. for the power-on-reset condition
RQ[3:0] = [1 0 0 0] then
V RH =56.25% V REF .................... when IDS =0
D H =56.25% ............................. when IDS =1
The range of V RR is 6.25% V REF to 100% V REF .
The range of D R is 6.25% to 100%.
The accuracy of V RR and D R is defined in the electrical
characteristics table.
RR[3:0] Ramp rate.
Decrease in commutation time at each
commutation change.
Typically at each commutation change:
t COM ( next ) = t COM – ( n + 1) × 0 . 2 ms
where t COM(next) is the next commutation time in ms,
t COM is the present commutation time in ms,
and n is a positive integer defined by RR[3:0]
e.g. for the condition RR[3:0] = [0 1 1 1]
the commutation time will be reduced by 1.6ms at
each commutation change.
The range of RR is 0 to 15.
The range of the commutation change is 0.2ms to 3.2ms.
The accuracy of RR is determined by the system clock
frequency as defined in the electrical characteristics table.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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