Hi
I'm using BQ24170 for 1cell Li-Ion battery application, and powered by DC5V. Below is the schematic diagram.
In the circuit, the voltage of pin-ISET is set to 0.709V, as the RSR is 0.043ohm, so the charge current shall be 824mA (0.709/(20*0.043)) . But the actual is not same, the actual charging current is ~570mA, much smaller than the expected.
I made following double confirmation with multimeter:
The voltage of pin-ISET: 0.7043V; the voltage of 5V input: 4.9934V; the voltage of pin-PVCC: 4.8839V; the voltage across RSR: 24.67mV; the voltage of VBAT: 3.6093V, and it's increasing with time.
And I also confirmed that the 5V input power is ~2.2W, so I think the resistance of RSR shall be no problem, and there is no other power dissipation. (During test, only the battery charge circuit is working, the power to system has been cut off)
Can someone help check why this issue happened? Thanks for your help in advance!
