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LM3658: How to change charging rate on the go ?

Part Number: LM3658
Other Parts Discussed in Thread: BQ24040

We know that the part support 100mA / 500mA switching on the USB pin.

We would like to have a 200mA / 1000mA charge current switch capability from the wall adapter. Can this be achieved using a BJT in parallel with a low value resistor so that when the BJT is turned on, the effective resistance lowers down to have a higher current ?