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Setup
2 Setup
Specific connections on the TPS8802EVM board require configuration before starting the evaluation.
2.1 Sensor Connections
TI recommends connecting a photoelectric smoke chamber and CO sensor to the TPS8802EVM for the
evaluation. The TPS8802EVM has a built-in photodiode (D7), blue LED (D8), and IR LED (D6) for functional
testing. These components can be de-soldered in order to connect a photoelectric chamber photodiode, IR LED,
and/or blue LED its place. Ensure the photodiode wires are kept short to preserve signal integrity.
The CO sensor is connected to J17 screw terminals with the sensor counter terminal tied to AGND.
2.2 Jumper and Switch Configurations
The S1 switch position determines the VMCU and VBST voltage at power-up. Ensure that only one S1 sub-
switch is in the ON position.
position. For proper operation with the USB2ANY adapter, set VMCU to 3.3 V with sub-switch 4.
The J2 jumper connects VBST to VCC. With the J2 jumper connected and the power supply connected to VBAT,
the boost converter supplies power via VCC. This configuration allows the EVM to operate at a voltage level
1
from 2 V to 11.5 V
.
The J6 jumper selects the I
Connect J6 to the VMCU position to set the address to 0x2A. The GUI is compatible with both options and
defaults to 0x2A.
1
The J14 shunt connecting VBAT to DINB limits the VBAT voltage to 11.5 V. If the shunt is moved to J1 connecting LEDLDO to DINB,
up to 15.5 V can be supplied on VBAT.
4
Using the TPS8802EVM
Table 2-1
displays the VMCU and VBST voltage corresponding with each S1 switch
Table 2-1. VMCU and VBST Power-up Voltage
S1 Switch Position
VMCU (V)
1
2
3
4
2
C device address. Connect J6 to the AGND position to set the address to 0x3F.
Copyright © 2022 Texas Instruments Incorporated
VBST (V)
1.5
3
1.8
3
2.5
4
3.3
5
SLVUBR8B – OCTOBER 2019 – REVISED JULY 2022
www.ti.com
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