3. The ICHG resistance is changed into the battery indicator light with 470 resistance of 3.1V, and the indicator 1a current on the 5V side of the test with the battery of 3.43.8V is normal. The current is set to 2.5a, and the battery voltage is 3.4V now.When the battery is not discharged under normal conditions, the output is normal 4.2V, and when the load is added, it does not work.。
Hi,
Please visit https://e2e.ti.com/support/power-management/f/196/t/890626 for BQ25606: Schematic Review and PCB Layout Design Tips. Additional Information including FAQs is available http://www.ti.com/lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606.
Please visit 
for layout guidelines. BQ2589X has similar pin-out with the BQ25606.
These information should be helpful to resolve your questions.
Thanks,
Ning.
