OM9371SF International Rectifier Corp., OM9371SF Datasheet - Page 2

• Manufacturer Part Number: OM9371SF
• Description: 60v Hi-rel Three-phase Brushless Dc Motor Controller In A F-43 Package
• Manufacturer: International Rectifier Corp.

OM9371
This table shows the Phase Output state versus
the state of the Hall-Effect and Direction Inputs.
Please note that the OM9371 Hall-Effect Inputs
are Grey-encoded; that is, only one input is
allowed to change from one input state to
another at a time.
The commutation coding shown reflects Hall-
Effect sensors that are spaced at 120
mechanical
protection logic disables all three Phase
Outputs when the Hall-Effect Inputs are set to
an illegal condition (i.e. all logic low or all logic
high).
COMMUTATION TRUTH TABLE
increments.
Also,
SIMPLIFIED BLOCK DIAGRAM
internal
2.1 - 2
Dir
X
X
1
1
1
1
1
1
0
0
0
0
0
0
DIGITAL INPUTS
H1
0
0
0
1
1
1
1
1
1
0
0
0
0
1
H2
0
1
1
1
0
0
0
0
1
1
1
0
0
1
H3
1
1
0
0
0
1
1
0
0
0
1
1
0
1
Source
Source
Source
Source
Hi-Z
Sink
Sink
Hi-Z
Sink
Sink
Hi-Z
Hi-Z
Hi-Z
Hi-Z
PHASE OUTPUTS
A
Source
Source
Source
Source
Sink
Hi-Z
Hi-Z
Sink
Hi-Z
Sink
Sink
Hi-Z
Hi-Z
Hi-Z
B
Source
Source
Source
Source
Hi-Z
Sink
Sink
Hi-Z
Hi-Z
Hi-Z
Sink
Sink
Hi-Z
Hi-Z
C