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

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7rots51

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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.
 

btbass

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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.
 

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