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:
from Texas Instruments
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.
Power
Supply
#1
Power
Supply
#2
System
Load
#1
USB2ANY
+
+
-
-
Figure 3-1. BQ25181EVM Connections
To adjust the charge current or change other parameters, connect the USB2ANY to the EVM and then startup
the TI Charger GUI.
Testing Procedures
6
BQ25181 EVM User's Guide
Copyright © 2022 Texas Instruments Incorporated
