Hi,
We have connected the output of LMR61428 (5V) to BQ24195 input via pfet.
The microcontroller senses the solar voltage continuously and upon good solar voltage, it enables the PFET so that the battery can be charged via solar power.
The LMR61428 output when tested on resistive load can deliver around 250mA to 300mA in good sun conditions.
BQ24195 has input current limit settings of 100mA, 150mA, 500mA ...... The customer needs maximum possible charging current so that marketing team can claim faster charging of the product battery.
When we are setting BQ24195 to 500mA or above, the LMR61428 output goes into hiccup or keeps on restarting. We can also hear a peculiar recurring chirping kind of sound and the charging just does not happen. The LMR61428 output voltage also keeps on hunting.
Please suggest a way out to achieve maximum current or else we will have to restrict the charging to 150mA max. This would waste the capacity of solar panel which yields higher output.
Regards
Atul Bhakay