Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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

Power Surge on USB Device

Status
Not open for further replies.

awsikar

Newbie level 6
Joined
May 3, 2007
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,365
surge current usb device

Hi,

i connected up my microcontroller board (PIC18F4550) via usb to the PC, then i got this msg "A USB Device has exceeded the power limits of its hub port".

Can anyone help to solve this problem?

 

Davood Amerion

Advanced Member level 2
Joined
Mar 1, 2005
Messages
584
Helped
116
Reputation
232
Reaction score
24
Trophy points
1,298
Location
Persia
Activity points
6,351
solving power surge on usb device

It seems your schematic diagram isnot complete.
anyway, i think you have to remove any large capacitance from power lines, because when USB conection stablished,
high surge current may drawn from USB port.
you can use smaller value insted.
another solution is to use small series resistor through USB (+5V), to limit surge current.
 

awsikar

Newbie level 6
Joined
May 3, 2007
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,365
get rid of power surge message

Repost:
I connected up my microcontroller board (PIC18F4550) via usb to the PC, then i got this msg "A USB Device has exceeded the power limits of its hub port".

Can anyone help to solve this problem?

 

IanP

Advanced Member level 5
Joined
Oct 5, 2004
Messages
7,942
Helped
2,309
Reputation
4,620
Reaction score
531
Trophy points
1,393
Location
West Coast
Activity points
66,459
how to solve power surge in usb

Circuits with microcontroller 'hate' relays ..
Try to bypass SW ..
Connect D1 and D2 directly to 'yellow' Vcc, and see how it goes ..

Regards,
IanP
 

kevpat

Member level 2
Joined
Nov 26, 2006
Messages
47
Helped
7
Reputation
14
Reaction score
0
Trophy points
1,286
Location
Scotland
Activity points
1,612
hotfix power surge on usb

Hi Awiskar,

I think Davood is probably right here, you are getting a surge current due to the large caps charging up on the VCC line. To verify this try changing D2 to a ferrite bead and see if this helps. The ferrite bead would be a better solution than a small value resistor as you will get a smaller DC drop on the VCC line, though this may not be a problem as your PIC will have a wide operating voltage range as long as you are running at low frequencies.
 

awsikar

Newbie level 6
Joined
May 3, 2007
Messages
13
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,365
hot fix power surge usb

Thankz guys,
i will try out the ferrite bead.

I did try the removal of SW but i still get the same message with the addition of a new messaage saying the device malfunction.
 

Clif

Newbie level 1
Joined
Oct 10, 2007
Messages
1
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,292
power surge on hub port no device enumeration

Hello
As I too had the problem and was searching for a solution I found the information below, however All I did was to reinstall Service pack to solvel the problem.

See Ya!!!!

Hi all,

At first ,it is a microsoft problem!!(Why I think that? cause if I disconnect everything from USB then restart,it pops up again!!)Nothing wrong with your PC or notebook,I've got the same message "Power surge on hub port"which keeps showing up and gets on my nerves :))I've never had this problem before,it appeared just after I installed SP2 and the rest of ...packs,well solution 1 - uninstall SP2 and you'll be fine,solution 2 reinstall XP then install ONLY SP2 and from on disable any updates...I think this bug is included in some XP hotfix which is installed right after SP2 installation.

My solution:

right click START ,choose properties,choose taskbar then customize ,and select power surge...and select ALWAYS HIDE

this way you get rid of the pop-up message and just don't worry about it :))

petr
 

btbass

Advanced Member level 5
Joined
Jul 20, 2001
Messages
1,897
Helped
438
Reputation
880
Reaction score
287
Trophy points
1,363
Location
Oberon
Activity points
12,861
usb power surge cicrcuit

The USB protocol states that when you plug in a device, it must not draw more than 100mA.
Then, during enumeration, the device can request up to 500mA from the port.
You should really have a way of of switching the psu to the rest of the circuit off untill after the request for more current is acknowledged.
 

Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top