IP2161 fast charge protocol verification buck verification board

Note: Don't believe the BOM, all parameters are marked in the circuit diagram, and most of the chip components are 0603 specifications.
This circuit uses STI34710 step-down and IP2161 fast charging protocol chip to make a fast charging protocol verification board. The
fast charging protocol supports QC3.0/QC2.0/FCP/AFC/Apple2.4A/BC1.2.
Because STI3471 limits the input voltage to no more than 18V, FU is a fuse that can be changed accordingly according to the input voltage. Because there is no 2A fuse, I directly short-circuit the test product with 0 ohms.
The STI3471 output voltage calculation formula Vo=0.6*[1+(RA/RB)]
The charging circuit outputs 5V by default. According to the IP2161 manual, RA is recommended to be 100K. Substituting it into the calculation,
RA=R3=100K RB=13.6K The output is 5.01V. Because there is no 13.6K resistor, R4 and R5 can be connected in series with two 6.8K to get 13.6K.
IP2161 can set the highest requested voltage during fast charging. To ensure flexibility, two 0603 resistors R7 and R8 are provided as jumpers.
R7 is shorted to request a maximum of 12V; R8 is shorted to request a maximum of 5V; neither is connected to request a maximum of 9V; remember not to connect them all, otherwise we will not be responsible for any problems! ! !
It is recommended to choose 25v 220uF for the two filter capacitors C1 and C4 for input and output, which can be changed as needed.
The role of D1 here is to add a fast charging indicator light. It is recommended to use a 5.1V or 4.7V voltage regulator diode for better results. If different colors of LED lights are used, the lighting voltage will also be different.
The entity is shown in the figure. Due to material reasons, some parameters are different. Among them, I only have a 5.6V voltage regulator diode for D1. When the voltage is 6.6V, the LED lights up slightly.
I didn’t find a small volume of input and output filter capacitors with sufficient voltage resistance, so I temporarily used 16V220UF instead. It’s not a big problem as long as the input voltage does not exceed the capacitor’s voltage resistance.
I didn't even connect the highest requested voltage selection of IP2161, but POWER-Z actually recognized that it supports QC2.0-12V. I don't know why hahahaha. If you need to support 12V, remember to short R7 and the input voltage should be higher than 12.6V.
Add a picture requesting QC3.0↓
The video of Station B will be attached after the recording is completed and reviewed