Microchip Technology dsPIC33CK - Page 46

dsPIC33CK Low-Voltage Motor Control Board User’s Guide DS50002927A-page 46  2020 Microchip Technology Inc.
FIGURE A-3: SCHEMATICS PAGE 3 OF 8
External Op Amp
VREF
7.5k
R120
2.49k
R119
3
2
1
DNP
U10
0R
0603
R75
IA_EXT
IA_EXT
VREF
SHUNT_IA_P
SHUNT_IA_N
IB_EXT
SHUNT_IB_P
SHUNT_IB_N
IC_EXT
SHUNT_IC_P
SHUNT_IC_N
IBUS_EXT
SHUNT_IBUS_P
SHUNT_IBUS_N
IBUS_FILT_EXT
62R 1%
R71
62R 1%
R78
1000 pF
50V
C46
470R 0.1%
R72
470R 0.1%
R79
DNP
C48
DNP
C107
DNP
C47
-A
2
+A
3
OUTA
1
Vඌඌ
11
Vൽൽ
4
MCP6024
U5A
+B
5
-B
6
OUTB
7
+
B
-B
OU
TB
MCP6024
U5B
+C
10
-C
9
OUTC
8
+
C
-
C
OUTC
C
C
MCP6024
U5C
+D
12
-D
13
OUTD
14
+
D
-
D
OUTD
D
MCP6024
U5D
0R
0603
R94
IB_EXT
VREF
62R 1%
R90
62R 1%
R95
1000 pF
50V
C54
470R 0.1%
R91
470R 0.1%
R96
DNP
C59
DNP
C53
DNP
C56
0R
0603
R109
IC_EXT
VREF
62R 1%
R112
1000 pF
50V
C64
470R 0.1%
R106
470R 0.1%
R113
DNP
C69
62R 1%
R105
DNP
C62
DNP
C67
1k
R114
0R
0603
R107
VREF
62R 1%
R110
1000 pF
C63
470R 0.1%
R104
470R 0.1%
R111
DNP
C68
62R 1%
R103
DNP
C61
DNP
C65
+A
3
-A
4
OUTA
1
Vඌඌ
2
Vൽൽ
5
A
A
MCP651S
U15
0.1 μF
C73
0.1 μF
C71
0.1 μF
C72
1000 pF
C70
0.1 μF
C75
20R
R118
DNP
C74
Vඊඝඛ
301R
R83
V_BUS
DC Bus Voltage
VDC
3.3k
R87
0.1 μF
C52
V_A
V_B
Phase Voltage Feedbacks
PHASE_A
PHASE_B
V_C
PHASE_C
3.3k
R86
VB
301R
R82
3.3k
R84
VC
301R
R80
VA
301R
R81
3.3k
R85
AGND
DNP
R98
AGND
TEMP_EXT
Temperature Sensor Interface – External
DNP
R93
DNP
C57
GND
2
Vඈඎඍ
3
Vൽൽ
4
MCP9700
U14
TEMP_LOCAL
100R
R97
AGND
Temperature Sensor – MOSFET Thermal Protection
200R
R92
0.1 μF
C60
SPEED_REFERENCE
Speed Reference
0.1 μF
C58
1
2
3
BAS40-04
D6
1
2
3
BAS40-04
D5
1
2
3
BAS40-04
D4
1
2
3
BAS40-04
D7
1
2
DNP
J9
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND
AGND AGND AGND
AGND
AGND
AGND
AGND
AGND AGND
AGNDAGND
AGND AGND AGND AGND
AGND
AGND
AGNDAGND
34k
R76
34k
R73
34k
R74
34k
R77
34k
R69
34k
R68
34k
R67
34k
R70
+3.3 VA
+3.3 VA
+3.3 VA
+3.3 VA
AGND
+3.3 VA
+3.3 VA
+3.3 VA
+3.3 VA
+3.3 VA
+3.3 VA
+3.3 VA
+3.3 VA
1 μF
C55
2
1
3
10k
POT1
IBUS_FILT_EXT
Voltage Reference
DC Bus Current Sensing Circuit
100R
R99
IBUS_EXT
1000 pF
C51
1000 pF
C49
1000 pF
C50
10k
R117
TEMP_EXT
TP21
TEMP_LOCAL
TP14
Vඋൾൿ
TP17
PGND
4.02k 0.1%
R66
4.02k 0.1%
R88
4.02k 0.1%
R89
4.02k 0.1%
R100
4.02k 0.1%
R102
4.02k 0.1%
R115
4.02k 0.1%
R101
4.02k 0.1%
R116
200R
R108
10000 pF
C66