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Test Procedure
Figure 5. Main Window of the bq2425xSW Evaluation Software
10. Turn on the computer. Open the bq2425x evaluation software. The main window of the software is
shown in
5.5
Recommended Test Procedure
5.5.1
Charge Voltage and Charge Regulation in Default Mode
1. Ensure that the recommended test setup is followed.
2. Connect the output of PS #1 in series with current meter (A #1) to J2 and J4 (IN, GND).
3. Connect VM #1 across J4 and J2 (IN, GND).
4. Ensure the CE is low by shorting JP3 to GND.
5. Turn on PS #1 and PS #2.
6. Enable PS #2 or equivalent battery and adjust PS #2 so that the voltage measured by VM #3, across
BAT and GND, measures 3.6 V ±50 mV.
7. Adjust the power supply so VM #1 still reads 6 V ± 100 mV and VM#3 reads 3.2 V.
•
Measure on A #2
→
I
CHRG
= 1000 mA ±150 mA
•
Measure on A #1
→
IIN = 600 mA ±100 mA
5.5.2
Input and Charge Current Regulation in Host Mode
1. Ensure that the recommended test setup is followed.
2. Follow
for initial setup
3. Open the bq2425x software:
•
Press the READ button to obtain the current settings.
•
Change the Input Current Limit to 100 mA
10
bq2425xEVM-150, Single-Cell Li-Ion Switch-Mode Charger
SLUUA08A – March 2013 – Revised April 2013
Copyright © 2013, Texas Instruments Incorporated