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A4964 Datasheet(PDF) 71 Page - Allegro MicroSystems

Part # A4964
Description  Sensorless Sinusoidal Drive BLDC Controller
PDF  92 Pages
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Manufacturer  ALLEGRO [Allegro MicroSystems]
Direct Link  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

A4964 Datasheet(HTML) 71 Page - Allegro MicroSystems

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Sensorless Sinusoidal Drive BLDC Controller
A4964
71
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Serial Register Reference
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
21: Speed loop
1
0
1
0
1
WR
SGL4 SGL3 SGL2 SGL1 SGL0 SG3
SG2
SG1
SG0
P
0
0
1
0
1
0
1
0
1
22: Speed loop
1
0
1
1
0
WR
DV1
DV0
DF1
DF0
SR2
SR1
SR0
P
0
1
0
0
0
0
0
0
0
23: Speed loop
1
0
1
1
1
WR
SL3
SL2
SL1
SL0
SH3
SH2
SH1
SH0
P
0
0
1
1
1
0
1
1
1
Register 21: Speed Control Loop Configuration
SGL[4:0] Speed Control Acceleration Limit
KSL = 6.3 + (n × 6.4) Hz
where n is a positive integer defined by SGL[4:0],
e.g. when SGL[4:0] = [0 0111] then KSL = 51.5 Hz.
The range of KSL is 6.3 Hz to 204.7 Hz.
SG[3:0]
Speed Control Gain
KS = 1 + (n × 2)
where n is a positive integer defined by SG[3:0],
e.g., when SG[3:0] = [1000] then KS = 9.
The range of KS is 1 to 31.
Register 22: Speed Control Loop Configuration
DV[1:0]
Duty Cycle Compensation
DV1
DV0
Nominal supply voltage
Default
0
0
Disabled
0
1
12 V
D
1
0
24 V
1
1
12 V
DF[1:0]
Deceleration Factor
DF1
DF0
Deceleration factor
Default
0
0
1
D
0
1
2
1
0
5
1
1
10
Register 22: Speed Control Loop Configuration (continued)
SR[2:0]
Speed Control Resolution
SR2
SR1
SR0
Speed Resolution
Default
0
0
0
0.1 Hz
D
0
0
1
0.2 Hz
0
1
0
0.4 Hz
0
1
1
0.8 Hz
1
0
0
1.6 Hz
1
0
1
3.2 Hz
1
1
0
3.2 Hz
1
1
1
3.2 Hz
Register 23: Speed Control Loop Configuration
SL[3:0]
Underspeed (Low-Speed) Threshold
fSL = 8 × n × fRES (Hz)
where n is a positive integer defined by SL[3:0],
fSL is the underspeed threshold, and
fRES is the speed resolution defined by SR[2:0].
SH[3:0]
Underspeed (High-Speed) Threshold
fSH = [127 + (n × 128)] × fRES (Hz)
where n is a positive integer defined by SH[3:0],
fSH is the underspeed threshold, and
fRES is the speed resolution defined by SR[2:0].



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