USB 2.0 and Charging

[tiwari.sachin]

Will a connection for USB work if used as follows

USB VBUS pin --> VBUS of MCU and also used for Charging
D+ --> D+ of MCU
D- --> D- of MCU
GND

I want to use VBus line for USB detection as well as use the power for charging at the same time

 

[KlausST]

Hi,

Maybe, maybe not.
What USB port, what MCU, what charging?

Klaus

 

[tiwari.sachin]

I am using renesas mcu... usb as a device.

I want to also use 5V from the usb to charge a Li ion cell... there will be a charging circuit ofcourse

--- Updated Oct 13, 2020 ---

Computer host --> usb cable --> mcu (usb device)

I also want to use vbus line to be used as power to charge the cell (Li Ion)

 

[KlausST]

Hi,

I assume you did an internet search. So you already know that USB2.0 can deliver up to 0.5A only and - according USB specification - only after USB communication and the host acknowledges.

Or you have a DCP (charging port - no PC). No communication needed, but pin configured.
There is a lot of documentation in the internet. Read through them to get a clue what is possible / what you need.

Klaus