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USB 2.0 and Charging

tiwari.sachin

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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

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Hi,

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

Klaus
 

tiwari.sachin

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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 ---

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

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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
 

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