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BSPD Shutdown Circuit
Image generated by Eeschema-SVG
+5V
+5V
0.1uF
0.1uF
+3V13
+3V13
43k
43k
0V
0V
+5V
+5V
+5V
+5V
Relay-
Relay-
+12V
+12V
TPSSig1
TPSSig1
Bat-
Bat-
1
1
1
1
2
2
2
2
3
3
3
3
4
4
4
4
5
5
5
5
6
6
6
6
7
7
7
7
8
8
8
8
J1
J1
1877285-8
1877285-8
C12
C12
22uF
22uF
0V
0V
+3V13
+3V13
3.9k
3.9k
H4
H4
Mount
Mount
+5V
+5V
0V
0V
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U9
U9
0V
0V
0V
0V
0.1uF
0.1uF
A1
A1
1
1
B3
B3
10
10
Y4
Y4
11
11
A4
A4
12
12
B4
B4
13
13
VCC
VCC
14
14
B1
B1
2
2
Y1
Y1
3
3
A2
A2
4
4
B2
B2
5
5
Y2
Y2
6
6
GND
GND
7
7
Y3
Y3
8
8
A3
A3
9
9
ORGATE1
ORGATE1
+5V
+5V
0V
0V
+5V
+5V
0V
0V
A1
A1
1
1
B1
B1
2
2
Y2
Y2
3
3
GND
GND
4
4
A2
A2
5
5
B2
B2
6
6
Y1
Y1
7
7
VCC
VCC
8
8
ANDGATE1
ANDGATE1
0V
0V
+5V
+5V
0.1uF
0.1uF
H2
H2
Mount
Mount
0V
0V
0.1uF
0.1uF
+3V13
+3V13
22uF
22uF
H1
H1
Mount
Mount
H3
H3
Mount
Mount
Q3
Q3
1
1
Q2
Q2
10
10
R2
R2
11
11
S2
S2
12
12
NC
NC
13
13
S3
S3
14
14
R3
R3
15
15
VDD
VDD
16
16
Q0
Q0
2
2
R0
R0
3
3
S0
S0
4
4
E
E
5
5
S1
S1
6
6
R1
R1
7
7
VSS
VSS
8
8
Q1
Q1
9
9
Latch1
Latch1
0V
0V
0V
0V
Relay-
Relay-
Relay+
Relay+
+12V
+12V
0V
0V
R12
R12
47k
47k
+5V
+5V
0.1uF
0.1uF
1k
1k
0V
0V
1
1
2
2
3
3
Q1
Q1
D1
D1
1N4001
1N4001
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U8
U8
1
1
2
2
LED1
LED1
0V
0V
Relay+
Relay+
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U1
U1
+5V
+5V
BrakeSig1
BrakeSig1
+5V
+5V
0V
0V
0V
0V
0.1uF
0.1uF
Bat-
Bat-
Bat-
Bat-
Bat-
Bat-
100k
100k
3.3k
3.3k
0V
0V
0V
0V
3.9k
3.9k
22uF
22uF
1M
1M
0.1uF
0.1uF
~{MR}
~{MR}
1
1
VCC
VCC
2
2
GND
GND
3
3
PFI
PFI
4
4
~{PFO}
~{PFO}
5
5
NC
NC
6
6
~{RESET}
~{RESET}
7
7
RESET
RESET
8
8
PoR1
PoR1
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U7
U7
+5V
+5V
0V
0V
0V
0V
0V
0V
28k
28k
+3V13
+3V13
0.1uF
0.1uF
0V
0V
+12V
+12V
0V
0V
ANODE
ANODE
1
1
CATHODE
CATHODE
2
2
EMITTER
EMITTER
3
3
COLLECTOR
COLLECTOR
4
4
Q2
Q2
FOD817DSD
FOD817DSD
1k
1k
0V
0V
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U3
U3
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U4
U4
0.1uF
0.1uF
0V
0V
+5V
+5V
0V
0V
R7
R7
R8
R8
0V
0V
+5V
+5V
R11
R11
+5V
+5V
+5V
+5V
0V
0V
0.1uF
0.1uF
0V
0V
0V
0V
R4
R4
+5V
+5V
R3
R3
0V
0V
R2
R2
BrakeSig1
BrakeSig1
1M
1M
TPSSig1
TPSSig1
0V
0V
R5
R5
+5V
+5V
+5V
+5V
R1
R1
0V
0V
0V
0V
0V
0V
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U6
U6
+5V
+5V
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U5
U5
+5V
+5V
R9
R9
+5V
+5V
0V
0V
R10
R10
R6
R6
0.1uF
0.1uF
0.1uF
0.1uF
0V
0V
0V
0V
0V
0V
+5V
+5V
0.1uF
0.1uF
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U2
U2
100ms Delay
100ms Delay
N.O. Relay
N.O. Relay
Isolated output to drive 12V relay
Isolated output to drive 12V relay
1 second delay
1 second delay
100ms Delay
100ms Delay
Power On Reset signal.
Power On Reset signal.
Ensures stable operation of the
Ensures stable operation of the
latch when power is cycled.
latch when power is cycled.
Red = Fault Exceeded Time Limit
Red = Fault Exceeded Time Limit
Hard Braking Threshold Voltage
Hard Braking Threshold Voltage
Purple = Final Output
Purple = Final Output
Brake Sensor fault
Brake Sensor fault
Simultaneous Braking and throttle
Simultaneous Braking and throttle
TPS
TPS
Brake Signal
Brake Signal
TPS Minimum Voltage (0.5V)
TPS Minimum Voltage (0.5V)
Brake Sensor Minimum Voltage (0.5V)
Brake Sensor Minimum Voltage (0.5V)
TPS fault
TPS fault
10% Throttle Threshold Voltage
10% Throttle Threshold Voltage
Brake Sensor Maximum Voltage (4.5V)
Brake Sensor Maximum Voltage (4.5V)
Orange = Fault
Orange = Fault
TPS Maximum Voltage (4.5V)
TPS Maximum Voltage (4.5V)
C12
C12
22uF
22uF
0V
0V
+3V13
+3V13
0V
0V
0V
0V
0.1uF
0.1uF
ORGATE1
ORGATE1
A1
A1
1
1
B3
B3
10
10
Y4
Y4
11
11
A4
A4
12
12
B4
B4
13
13
VCC
VCC
14
14
B1
B1
2
2
Y1
Y1
3
3
A2
A2
4
4
B2
B2
5
5
Y2
Y2
6
6
GND
GND
7
7
Y3
Y3
8
8
A3
A3
9
9
+5V
+5V
0V
0V
ANDGATE1
ANDGATE1
A1
A1
1
1
B1
B1
2
2
Y2
Y2
3
3
GND
GND
4
4
A2
A2
5
5
B2
B2
6
6
Y1
Y1
7
7
VCC
VCC
8
8
0V
0V
+5V
+5V
0.1uF
0.1uF
0V
0V
+3V13
+3V13
22uF
22uF
LED1
LED1
1
1
2
2
Bat-
Bat-
3.3k
3.3k
0V
0V
+5V
+5V
0.1uF
0.1uF
U9
U9
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
+5V
+5V
0.1uF
0.1uF
0V
0V
+5V
+5V
0.1uF
0.1uF
U8
U8
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
0V
0V
0V
0V
0V
0V
22uF
22uF
0.1uF
0.1uF
U7
U7
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
+5V
+5V
0V
0V
0V
0V
0V
0V
+3V13
+3V13
0V
0V
47k
47k
0V
0V
+5V
+5V
H4
H4
Mount
Mount
H2
H2
Mount
Mount
H1
H1
Mount
Mount
H3
H3
Mount
Mount
+5V
+5V
28k
28k
0.1uF
0.1uF
0V
0V
+12V
+12V
0V
0V
Q2
Q2
FOD817DSD
FOD817DSD
ANODE
ANODE
1
1
CATHODE
CATHODE
2
2
EMITTER
EMITTER
3
3
COLLECTOR
COLLECTOR
4
4
1k
1k
0V
0V
R12
R12
U3
U3
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
U4
U4
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
0.1uF
0.1uF
0V
0V
+5V
+5V
0V
0V
R7
R7
R8
R8
0V
0V
+5V
+5V
R11
R11
+5V
+5V
+5V
+5V
0V
0V
0.1uF
0.1uF
0V
0V
0V
0V
R4
R4
+5V
+5V
R3
R3
0V
0V
R2
R2
+5V
+5V
R1
R1
0V
0V
0V
0V
0V
0V
U6
U6
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
+5V
+5V
U5
U5
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
+5V
+5V
R9
R9
+5V
+5V
0V
0V
R10
R10
R6
R6
0.1uF
0.1uF
0.1uF
0.1uF
0V
0V
0V
0V
0V
0V
+5V
+5V
0.1uF
0.1uF
U2
U2
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
0V
0V
0V
0V
0V
0V
U1
U1
V-
V-
2
2
V+
V+
5
5
1
1
+
+
3
3
-
-
4
4
+5V
+5V
0.1uF
0.1uF
0V
0V
1M
1M
+5V
+5V
R5
R5