POM_
POM_BO
POM_RE
POM_R
POM_T
4.2Vd
PMIC_PB_
POM_SHDN
When
STM3
If
cold
reset
pusle
for
PM
T
Transistor
Buffer
CLK
OOT
SET
RXD
TXD
Linear
Regulator
3.3Vdc
100mA
minimum
<0.25V
dropout
wors
TLV70533 YFPR
dc
_IN
Transistor
Buffer
32
boots
up,
it
should
check
the
res
gets
detected,
STM32
generates
a
MIC_PB_IC.
ransistor
Buffer
EN
OBD_BAT
3.8Vdc_EN
From
POM
Linea
fo
5
5V_EN
STM32F103
64-pin
TFBGA
64K FLA
20K RA
16 4KB FLAS
HSE
8MHz
TXD
RXD
BOOT
RESETn
UA
RT
1
VCC
m
st
case
N
GPIO
set
reason.
negative
4.2Vdc,
3A
X
C
NWF
6500
Buck Switching
Power Supply
LT8610AB
4.2Vdc, 3.0A
ar
Regulator
r
Telit
USB
5V,
50mA
5.0Vdc
50mA
For
Telit
US
NWF
650
Pa
3R8H6
n
A64
ASH
AM
H Pages
GPIO
OBD _ON
GPIO
GPIO(
PA0
)
GPIO
GPIO(
PA2
)
GPIO(
PA3
)
GPIO(
PA1
)
CAN_TX
SN74 LVC2
SN74LVC2G 125YZPR
GPIO
GPIO
CAN_RX
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
GPIO
NWF
6500
O
GPIO
GPIO
GPIO
ADC
DAC
OBD_BA
X2
100 uF,
Ceramic
0
Power
Sup
LT6
2Mohm
2Mohm
1K
1uF
Buck
‐
boos
5
seconds
Joules
req
Assume
85
Joules
fro
Joules
=
½
Assume
in
ESR
worst
During
3A
Assuming
C
=
(11J
*
Assume
a
Each
cap
i
Linear
Regulator
for
POM
3.3V,
100mA
SB
00
Opera
ge
10
of
11
JPWM_OUTp
J1850/J1708
Circuits
JPWM_OUTn
JPWM_INp
JPWM_INn
J1708_IN
Linear
Regulator
Adjustable
5/8
Vdc
64mA
pulsed
output
MAX16910 CATA8+T
8V_EN
SCAN_Tool
C
‐
clip
ISO_EN
L_OUT
K_OUT
K_INn
ISO 9141
KWP2000
Circuits
CAN_ENn
TXCAN
RXCAN
CAN
Circuits
CAN_ENn
TXCAN
RXCAN
CAN
Circuits
MAX3051EKA
2G125 YZPR
MODE1
TXCAN
RXCAN
CAN
Circuits
MODE0
TH8056
MAX3051EKA
5/8Vdc
OBD
Interfac
SCAN_Tool
C
‐
clip
SCAN_Tool
C
‐
clip
SCAN_Tool
C
‐
clip
Comparator
AT
CO
Unplugging
Detection
SuperCap
Cooper
Bussman
5F
+/
‐
20%
2.1V
pply
Block
Dia
6000IDCB#TRPBF
Kohm
10ohm
SuperCap
Cooper
Bussman
5F
+/
‐
20%
2.1V
HV1020
‐
2R7505
‐
R
5F
+/
‐
20%
Diameter=
10mm
Length
=
20mm
ESR
=
38mOhm
st
Method
s
@
500 mA
average
load
uired
at
load
=V
*
I
*
time
=
3.8
*
0.5
*
5
=
9.5
5%
efficiency
from
the
LTC3113
Regulator.
m
caps
=
9.5/0.85
=
11J
½
CV^2
itial
max
ESR
per
cap
of
0.038
ohms,
+200%
a
t
case
at
end
of
life ,
in
series ,
thus
0.038
x
2
x
peaks
from
the
cellular
module,
LTC3113
has
a
1.5A/0.85,
or
1.76A
source
from
the
caps,
m
2)/((4.2
– 0.268)^2
– (1.8+0.268)^2))
=
1.97F
+/
‐
20%
tolerance
of
the
capacitance.
n
series
has
to
be
nominally
rated
at
(1.97
x
2
tions
Ma
J1850p
J1850n
OBD
OBD
OBD
OBD _BAT_Switched
36 Vdc
Max
ISO_L
ISO_K
OBD
OBD
CAN_H
CAN_L
OBD
OBD
CAN_H
CAN_L
A+T
OBD
OBD
CAN_H
OBD
ADG1412
A+T
OBD
Input
Requi
5
to
36Vdc
w
<4mA
sleep
e
Block
Diag
OMP_INT
Switching
Buck/
Boost
Regulator
LTC 3113
3A
Input
Voltage
=
1.8
to
5.5Vdc
Cost
=
$2.80
IQ
=
40uA
agram
EN
At
1.8
At
>3V
5J
after
1000
hours
at
65C.
2
=
152mOhms
s
to
deliver
1.5A
(for
1154 uS)
means
a
1.76A
x
0.152
ohm
drop,
or
0.268
Vd
2)/0.8
=
4.92F
anual
Pin 2
Pin 10
Pin 4,5 (GND)
FET
Switch
EN
Voltage
Divider
Pin 15
Pin 7
Pin 6
Pin 14
Pin 3
Pin 11
Pin 1
Pin 16
irements:
with
voltage
transient
limiting
of
150V
mode,
‘<500uA
power
‐
down
mode
PTC
Fuse
3A
ERB
‐
RE3R00V
gram
X2
100 uF,
Ceramic
Sizing
Bulk
Caps
at
Ce
Regulator
provides
1
Cellular
module
requ
The
bulk
caps
have
t
I
=
C
dv/dt
1.5
=
C
(3.8
– 3.3
– 1.
C
=
1.5A
x
1154uS
/
(
Assuming
ESR
=
0,
C
Three
1500 uF
capac
Assume
ESR
of
caps
i
ESR
of
3
parallel
caps
ESR=
0.04
ohm,
C=
3
Three
caps
provide
4
3.8Vdc
8Vdc
input,
current
out
is
1.5A
max
3Vdc
input,
current
out
is
3.0A
max
dc.
EEE
‐
FP0J152AP
1500 uF,
6.3V,
20%
$0.20
Aluminum
‐
55
to
105 C
ESR
=
0.06
ohms
nomina
10mm
diamter ,
10.2mm
3.8Vdc
Supply
Protection
32V
zener
clamped
ellular
Module
1.5A
worst
case.
uires
3A
for
1154uS,
worst
case.
o
provide
3
– 1.5,
or
1.5A
for
1154 uS.
.5*ESR)/1154 uS
(3.8
– 3.3
– 1.5*ESR)
=
3462 uF,
3.46mF,
0.0035F
itors
are
needed.
is
200 %
of
nominal,
or
0.12
ohms
s
is
0.04
ohms
max
3934uF
4500uF.
al
m
length
Wi
‐
Fi
‐
800mA
Max
Linux
Processor
‐
250m
GPS
‐
100mA
max
Bluetooth
‐
50mA
Max
Total
1.2A
Cellular
500mA
Average
Max
Curre
3A
peak,
1154uS
When
DUT
is
unplugge
‐
Wi
‐
Fi
turned
off,
‐
GPS
turned
off
‐
Bluetooth
turned
off
‐
Processor
reduces
c
‐
OBD
turned
off
OBD_BAT
mA
Max
x
ent
ed:
f
lock
speed
