Block Diagram

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
USB 3
Connector
STUSB4500
Stand-alone USB
Power IC
BQ25703
Bat. Charger
Sys. Power
TPS62177
3.3V Power
Battery
3/6 cell Li-ion
2200mAH/4400mAH
HV Inverter
5V to -200V
Chamber
Board
STM32
FT232R
FTDI UART
TO USB IC
Environmental
Sensors
Accelerometer
Logic to determine
available power.
4.5V-22V
CURRENT CONTROL
9.2V-12.6V
ADC
UI LEDSUI BUTTONS
PROGRAMMING
PORT (SWD)
Nordic BLE P04
Chamber
Real-Time-Clock
Serial Flash
8Mbit
MCP1703
Always On 3.3V
Always On Logic
LOCK
SHUTDOWN
3.3V
MCP1804
HV 5V Supply
5V
RESET#
AO-3.3V
BAT
ST715MR
5V Supply
for USB
POWER OFF CU
RRENT DRAIN <250uA
POWER ON CURRENT DRAIN <10mA
AO-3.3V
UART
I2C
I2C
I2C (Optional)
SPI
SPI
SPI UART
MCP4032
DUAL DGITAL
TRIM POT
SPI
Not RESETABL
E
from STM32
Powered from
USB Connector
USB 5V
LOCK-ON
ON
CHARGER ON
FET
J201
Title
Size
Date
Sheet
of
Rev
Spruce Environmental
Technologies, Inc.
8
2
RadStar 2 Main Board
B
BLOCK DIAGRAM
0C
Thursday, March 21, 2019
<V
ariant Name>
Title
Size
Date
Sheet
of
Rev
Spruce Environmental
Technologies, Inc.
8
2
RadStar 2 Main Board
B
BLOCK DIAGRAM
0C
Thursday, March 21, 2019
<V
ariant Name>
Title
Size
Date
Sheet
of
Rev
Spruce Environmental
Technologies, Inc.
8
2
RadStar 2 Main Board
B
BLOCK DIAGRAM
0C
Thursday, March 21, 2019
<Variant Name>
8 MHz
S-35390A
32.768 kHz
64 MHz
2.4 GHz
ANT