Apr 17, 2003 #1 C cesare Full Member level 3 Joined Feb 21, 2002 Messages 174 Helped 9 Reputation 18 Reaction score 2 Trophy points 1,298 Activity points 1,226 USB Spec Hi All, does anyone knows the limit of 500 mA that a function can draw from a self powered hub is a peak or average vaule ? Thanks
USB Spec Hi All, does anyone knows the limit of 500 mA that a function can draw from a self powered hub is a peak or average vaule ? Thanks
Apr 17, 2003 #2 U usbman Advanced Member level 4 Joined Sep 22, 2002 Messages 118 Helped 2 Reputation 4 Reaction score 1 Trophy points 1,298 Location Germany Activity points 1,020 Re: USB Spec cesare said: Hi All, does anyone knows the limit of 500 mA that a function can draw from a self powered hub is a peak or average vaule ? Thanks Click to expand... this is covered in the spec: a buspowerd device should never sink more than 500 mA = 5 unitloads. To avoid peaks the device must implement inrush current limiting. usbman
Re: USB Spec cesare said: Hi All, does anyone knows the limit of 500 mA that a function can draw from a self powered hub is a peak or average vaule ? Thanks Click to expand... this is covered in the spec: a buspowerd device should never sink more than 500 mA = 5 unitloads. To avoid peaks the device must implement inrush current limiting. usbman