3pi+ 32U4 Control Board
©
2020 Pololu Corporation
www.pololu.com
Schematic diagram
Power
R
®
Page 4 of 4
Input structure of OFF and CTL inputs
47k
4.7k
CTL
Simplified switch schematic
1
2
VBAT
VBAT
1
2
OFF
1
VBAT
100k
VRP
VSW
VBAT
SW
100k
VBAT
Btn Jmp
BAT1 (2x AAA)
ON
Input structure of ON input
BAT2 (2x AAA)
OFF
1
2
3
4
3V3
1
2
3
4
5V
VM
ON
CTL
VSW
Latching Circuit
pushbutton
PWRB
PWRA
1
2
3
1
2
4
3
5
PWRB
SW
PWRA
ON
OFF
CTL
R5V
VM
VBUS
5V
20k
R35
2.21k
R36
1k
R58
1k
R59
5V
R5V
VBUS
STAT
1
EN
2
VSNS
3
ILIM
4
GND
5
IN2
6
OUT
7
IN1
8
PAD
9
TPS2113A
D6
Blue
D7
Green
D11
Blue
D12
Blue
STAT
10 uF
C23
10 uF
C24
0.1 uF
C25
100k
R40
270
R41
10 uF
C28
0.1 uF
C29
0.1 uF
C30
1 uF
C31
20k
R42
1
STAT
L2
VM
VSW
BST
8
SW
6
VDD
2
EN
1
FB
3
GND
5
VIN
10
MODE
9
VOUT
7
GND
4
0.1 uF
C27
100k
R38
330 uF
C35
NP
C45
10 uF
C32
0.1 uF
C36
0.1 uF
C37
10 uF
C40
10 uF
C42
475k
R63
220 uF
C38
154k
R39
10 uF
C34
10 uF
C39
10 uF
C41
10 uF
C43
4.7k
R62
4.7 uF
C47
68.1k
R64
L3
VSW
R5V
SW
9
FB
3
VOUT
2
VBAT
6
EN
1
GND
5
LBO
4
PS
8
LBI
7
PAD
11
PGND
10
100k
R60
2.2uF
C44
0.1
R56
10 uF
C26
10uF
C56
10uF
C57
10uF
C58
0.1 uF
C46
10 uF
C55
10uF
C59
10uF
C60
10uF
C61
5V
3V3
AVR3V3
IN
1
ON/OFF
3
OUT
5
NC
4
GND
2
3.3V LDO
NP
R30
10 uF
C19
1 uF
C20
1 uF
C21
