If you are designing a digital gadget that there's no guarantee what charger the users will use, then you need to design it to be compliant. You need to consume no more than 100mA before enumeration, and use MCU to dynamically change current limit after enumeration. 1.5A is only possible after BC1.1/BC1.2 compatible chargers are detected per USB specification. Most USB-enabled chips have built-in BC detection circuit, you just need to enable it and read the result from register.
Dear Sir Blueskull,
At this moment, we are considering 2 QC and PD charger.
Now we have measured the current while connect the Galaxy note 5 to those charger.
In QC mode, the adapter has 9v/1.67A, while measured we saw 1.23A.
My co-worker think, other 0.46 A will go to charger IC portion.
![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/facepalm.gif)
He told me to think this.
Do you think, it will make a problem?
Already BQ24266 has input current limit 2.5A maximum.
On the other hand I found a IC, which has current sensing phenomena.
Take a look,
http://cds.linear.com/docs/en/datasheet/4020fd.pdf ,what do you think?