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Revision 1.4
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AS5132
Datasheet - Detailed Description
Figure 20. Dynamic and Static Pre-Commutation
7.3.5 Hysteresis of the Incremental Outputs
A hysteresis is implemented to get a stable output value at the SSI command and to reduce jitter at the PWM and UVW outputs. At start up the
hysteresis counter is at 0, the range is ? LSB. The hysteresis can be deactivated by setting OTP bit Hyst_dis.
Figure 21. Hysteresis of the Outputs
120
180
2 pole pairs, Counter Clockwise rotation
electrical angle
mechanical angle
0
60
180
240
300
60
120
0
pole pairs, Clockwise rotation
electrical angle
mechanical angle
0
60
180
240
300
60
120
180
120
0
30
90
120
150
210
240
270
60
0
180
Dynamic pre-commutation 0x00 & 0x3F
Static pre-commutation 0x00...0x06
Dynamic pre-commutation 0x00 & 0x3F
Static pre-commutation 0x00& 0x06
0
30
90
120
150
210
240
270
60
180
U
V
W
U
V
W
Effect of Hysteresis
CW rotation
CCW rotation
0
Ma net Position
ngle Output
1
2
3
4
5
6
0
1
2
3
4
5
aN
a
N
-1
0
1
Hysteresis counter startup value
Counter Range: 3 LSB
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