ArticCynda
Advanced Member level 1
Hi all,
I'm working on a design that draws power through USB but needs about 1.5A of current at 5V. Hence I'm exceeding the 500mA limit and need to "negotiate" a higher current from the source. I've read various pieces of USB documentation and I understand a small microcontroller would be the way to do this properly. I'm looking for a solution that doesn't require me to implement custom embedded software, however.
Does anyone know of any custom ICs that negotiate a higher current with the host? Ideally I'm looking for a single chip solution that allows the current to be negotiated to be programmed with an external resistor or something similar.
Note: my on board power system is only compatible with 5V so I can't use the C-type controllers that pull up the voltage to 20V.
Thanks for any recommendations or advice, as usual!
I'm working on a design that draws power through USB but needs about 1.5A of current at 5V. Hence I'm exceeding the 500mA limit and need to "negotiate" a higher current from the source. I've read various pieces of USB documentation and I understand a small microcontroller would be the way to do this properly. I'm looking for a solution that doesn't require me to implement custom embedded software, however.
Does anyone know of any custom ICs that negotiate a higher current with the host? Ideally I'm looking for a single chip solution that allows the current to be negotiated to be programmed with an external resistor or something similar.
Note: my on board power system is only compatible with 5V so I can't use the C-type controllers that pull up the voltage to 20V.
Thanks for any recommendations or advice, as usual!