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RAJ306101 RSSK User's Manual
3.3.2
Board Settings
In the sensorless 120-degree conducting control, the motor position is detected by zero-crossing of the
inductive voltage (BEMF).
The inductive voltage (BEMF) can be sensed by input the phase voltages to the differential amplifiers or
BEMF sense amplifier of the smart gate driver. In the sample program, the BEMF sense amplifier is disabled
and the differential amplifiers are used for BEMF sensing.
Align the board connection settings on the Evaluation Board with Figure 3-10.
For details on the circuit diagram of the Evaluation Board, refer to the Schematic (R12TU0224EJ).
SR4
U
V
W
R162
R161
R164
R163
R166
R165
R336
R21
R337
R22
0
0
R338
0
R339
0
R340
0
R341
0
0
： Short (0[Ω] resistor or solder)
： Mount register
： Not mount (open)
： Short (jumper pin)
Figure 3-10 Board Connection Settings (Sensorless 120-degree Conducting Control)
R12UZ0129EJ0100
Rev.1.00
Nov 1, 2023
SR1
SR2
SR3
0
0
0
0
0
0
R26
R27
R351 R360
0
R34
R35
R36
R37
R354 R361
R357 R362
0
0
0
0
C12
C13
R24
Chapter 3. Usage
R150
R126
R148
R124
JP302
0
C14
JP303
R25
JP301
Page 26 of 55
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