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A4964 Datasheet(PDF) 69 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) 69 Page - Allegro MicroSystems

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Sensorless Sinusoidal Drive BLDC Controller
A4964
69
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
17: Startup config
1
0
0
0
1
WR
WIN WMF2 WMF1 WMF0 WBD3 WBD2 WBD1 WBD0
P
0
0
0
1
0
0
1
1
1
18: Startup config
1
0
0
1
0
WR
SF23 SF22 SF21 SF20 SF13 SF12 SF11 SF10
P
0
0
1
1
1
0
1
1
1
Register 17: Startup Configuration
WIN
Windmill Mode Select
WIN
Windmill Mode
Default
0
Windmilling disabled
D
1
Windmilling enabled
WMF[2:0] Minimum Windmill Detection Frequency
fWM = 0.4 + (n × 3.2) Hz
where n is a positive integer defined by WMF[3:0],
e.g. when WMF[2:0] = [010] then fWM = 6.8 Hz.
The range of fWM is 0.4 Hz to 22.8 Hz.
WBD[3:0] Duty Cycle During Windmill Braking
DWB = (n + 1) × 6.25%
where n is a positive integer defined by WBD[3:0],
e.g. when WBD[3:0] = [0111] then DWB = 50%
The range of DWB is 6.25% to 100%.
Register 18: Startup Configuration
SF2[3:0] Start Ramp Final Frequency
fS2 = 10 + (n × 2.5) Hz
where n is a positive integer defined by SF2[3:0],
e.g. when SF2[3:0] = [0111] then fS2 = 27.5 Hz.
The range of fS2 is 10 Hz to 47.5 Hz.
SF1[3:0] Start Ramp Initial Frequency
fS1 = 0.5 + (n × 0.5) Hz
where n is a positive integer defined by SF1[3:0],
e.g. when SF1[3:0] = [0111] then fS1 = 4 Hz.
The range of fS1 is 0.5 Hz to 8 Hz.



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