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Testing Procedures
3 Testing Procedures
3.1 Equipment
This section includes a list of supplies recommended to perform tests on this EVM.
1. Two Power Supplies: Keithley 2400 Power Supply or equivalent
a. Power Supply #1 (PS #1) will be used as input voltage
b. Power Supply #2 (PS #2) will be used as battery voltage
2. Four Channel Oscilloscope: To monitor voltages at VIN, VBAT, and VSYS
a. Channel 1 (SC #1) will be used to probe VIN
b. Channel 2 (SC #2) will be used to probe VBAT
c. Channel 3 (SC #3) will be used to probe VSYS
3. Computer: A computer with a least one USB port and a USB cable
4. PC communication interface:
5. Software: Download the
3.2 Charge Mode
Connect the equipment as follows:
•
Power Supply PS #1: VIN of the BQ25181EVM at 5 V
•
Power Supply PS #2: VBAT of the BQ25181EVM at 3.7 V
•
Scope Channel SC#1: VIN at TP5
•
Scope Channel SC#2: VBAT at TP8
•
Scope Channel SC#3: VSYS at TP6
Turn ON power supply PS #2, then turn ON supply PS #1. With PS #1 enabled, VSYS will rise to the level of 4.5
V and the /PG LED will turn on to indicate Power Good. The device will begin to charge as long as TS is left at
default configuration, J13 connects the /CE pin to low, and there are no other faults.
To adjust the charge current or change other parameters, connect the USB2ANY to the EVM and then startup
the TI Charger GUI.
6
BQ25181 EVM User's Guide
USB2ANY
with the latest firmware
TI Charger GUI
from Texas Instruments
Power
System
Supply
Load
#2
#1
+
-
Figure 3-1. BQ25181EVM Connections
Copyright © 2022 Texas Instruments Incorporated
Power
Supply
#1
-
+
USB2ANY
www.ti.com
SLUUCL3 – APRIL 2022
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