I am looking at the CN3083 chip to charge a LiPo battery using a small solar panel (5V 0.15W).
To set the charging current, the pin ISET is used with a fixed resistor, to set the constant charge current (max charging current = 600mA).
In which case woud I need a BJT to control the charging current rather than a fixed resistor?
Is there an advantage to have a variable charging current rather than a fixed one?
For example, if my solar panel is outputting 4.2V or 5V, wouldn't it just be better to keep the charging current as high as possible? (600 mA)
Here is the schematic of the IC I am using (CN3038).