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A4964 Datasheet(PDF) 89 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) 89 Page - Allegro MicroSystems

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Sensorless Sinusoidal Drive BLDC Controller
A4964
89
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
Table A2b: Fault Response Actions (ESF = 1, WD masked)
Fault Description
Disable
Outputs
RSC [7]
Fault State
Latched
Other Action
Fault State Reset
Re-Enable Outputs
No Fault
No
n/a
n/a
None
n/a
System Error
Yes [1]
n/a
Yes
RUN = 0
POR, RUN = 1
Serial Error
No
n/a
No
None
POR or SPI [3]
n/a
VBB POR
Yes [1]
n/a
No
Internal logic
shutdown & reset
Condition removed
RUN = 1
VBB Undervoltage
Yes [1]
0
Yes
None
Demand input = 0 or RUN = 0
Demand input reset [5]
or RUN reset [6]
SPI [3][4]
1
No
Condition removed
VLR Undervoltage
Yes [1]
0
Yes
MCU reset
10 ms after condition removed
when MRSTn goes high
Demand input reset [5],
RUN reset [6], or SPI [3][4]
1
Yes
10 ms after condition removed when MRSTn goes high
VREG Undervoltage
Yes [1]
n/a
No
None
Condition removed
Bootstrap Undervoltage
Yes [1]
n/a
Yes
None
Demand input = 0 or RUN = 0
Demand input reset [5]
or RUN reset [6]
SPI [3][4]
Temperature Warning
No
n/a
No
None
Condition removed
n/a
Overtemperature
Yes [1]
n/a
Yes
VLR regulator
shutdown & MCU
reset
10 ms after condition removed
when MRSTn goes high
Demand input reset [5],
RUN reset [6], or SPI [3][4]
10 ms after condition removed when MRSTn goes high
Loss of Synchronization
Yes [1]
0
Yes
None
Demand input = 0 or RUN = 0
Demand input reset [5]
or RUN reset [6]
SPI [3][4]
1
No
Stop and restart
Condition removed
VDS Overvoltage
Yes [1]
n/a
Yes
None
Demand input = 0 or RUN = 0
Demand input reset [5]
or RUN reset [6]
SPI [3][4]
[1]
All gate drives low, all MOSFETs off.
[2]
Gate drive for the affected MOSFET low, only the affected MOSFET off.
[3]
Only when DSR = 0.
[4]
Serial read of Status or Diagnostic register.
[5]
Set demand input = 0 then set demand input to a new operating value.
[6]
Set RUN bit = 0 then set RUN bit = 1.
[7]
Restart control bit.



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