How to get more than 100 mA current from USB port?

[7rots51]

In normal operation we can get 100 mA from USB port,But if we need more than 100 mA (less than 500mA) ,how we can get this current ? what we should do?
Is there any way?

I use FT245R and FT232R for usb interface.

 

[A.Anand Srinivasan]

USB current

500mA is not a big problem... USB can source upto 500mA provided while sending configuration descriptor it has specified the maximum amount of current it wants to draw... view https://www.beyondlogic.org/usbnutshell/usb2.htm for more details....

 

[btbass]

USB current

FTDI supply a free configuration tool for their chips. It programs the eeprom so the descripters request extra current, up to 500mA.
Take a look at their website.