Use the following steps to enable the EVM test
setup.
- Make sure Section 2.2 steps have been followed.
- Remove the shunt on JP19 to disable charge.
- Make sure the PROG pin jumpers,
JP22-JP29, are set to the desired frequency and cell count.
- If a thermistor is being
simulated, then make sure the TS Jumpers are installed to the correct
positions.
- If using BQStudio, then launch the
BQSTUDIO software and select Charger then BQ25790EVM, if not
already done.
- If using TI Charger GUI, then go
to the TI Charger GUI website and select the charger from
the list.
- Turn on PS1 and Load #1:
- Measure ➡
VSYS-PGND (TP26 and TP48) = 8.55 V ±0.2 V
- Verify PG LED
(D13) is on.
Note:
If the PG LED is not lit,
then confirm a valid PS1 is connected and the correct shunt
configuration was placed.
Note:
If the device is not communicating and does not
ACK, then verify that Section 2.2 and Section 2.4.1 steps have been followed. Verify the voltage across TP42 (PULLUP) and
TP49 (AGND) is approximately 3.3 V.