Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

USB Specification - question

Status
Not open for further replies.
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
 

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
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top