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UX-A7DVD
4.6 BA6664FM-X (IC251) : Motor driver
• Pin layout & Block diagram
RNF
VM GSW VCC
28
27
GAIN
SWITCH
TSD
DRIVER
GAIN
CONTROL
A3
• Pin function
Pin No.
Symbol
1
NC
2
A3
3
NC
4
A3
5
NC
6
NC
7
A1
8
GND
9
H1+
10
H1-
11
H2+
12
H2-
13
H3+
14
H3-
15
VH
16
BR
17
CNF
18
SB
19
FG2
20
FR
21
ECR
22
EC
23
PS
24
FG
25
VCC
26
GSW
27
VM
28
RNF
FIN
FIN
1-46 (No.22013)
FG
PS
EC
25
24
23
22
26
VCC
PS
TORQUE
CURRENT
SENSE AMP
TL
HALL AMP
4
2
7
8
A2
A1
GND
NC
Output3 for motor
NC
Output2 for motor
NC
NC
Output1 for motor
GND
Positive input for hall input Amp1.
Negative input for hall input Amp1.
Positive input for hall input Amp2.
Negative input for hall input Amp2.
Positive input for hall input Amp3.
Negative input for hall input Amp3.
Hall bias terminal
Brake Mode terminal
Capacitor connection pin for phase compensation
Short brake terminal
3Phase synthesized FG signal output termnal
Rotation detect signal output terminal
Torque control standard voltage input terminal
Torque control voltage input terminal
START/STOP switch
FG signal output terminal
Power supply for driver division
Gain switch
Power supply for driver division
Resistance connection pin for output current sense
GND
ECR
FR
FG2
21
20
19
SHORT BRAKE
VCC
+ -
SENSE AMP
VCC
+ -
+ -
+ -
9
10
H1 +
H1 -
Function
SB
CNF
BR
18
17
16
BRAKE MODE
Hall Bias
R Q Q
D CK
+ -
+ -
+ -
11
12
13
H2 +
H2 -
H3 +
VH
15
14
H3 -
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