Re: USB port blew -- why?
From: keith (krw_at_att.bizzzz)
Date: 10/05/04
- Next message: Salvatore: "Re: Best Electrolytic Cap for Audio/Computer Repair"
- Previous message: Andy Cuffe: "Re: Sony KV-27EXR25 Pincushion and No Picture Problem"
- In reply to: daytripper: "Re: USB port blew -- why?"
- Next in thread: David Maynard: "Re: USB port blew -- why?"
- Reply: David Maynard: "Re: USB port blew -- why?"
- Reply: NSM: "Re: USB port blew -- why?"
- Messages sorted by: [ date ] [ thread ]
Date: Mon, 04 Oct 2004 21:56:43 -0400
On Mon, 04 Oct 2004 03:21:58 +0000, daytripper wrote:
> On Mon, 04 Oct 2004 01:50:54 GMT, "NSM" <nowrite@to.me> wrote:
>
>>
>>"larrymoencurly" <larrymoencurly@my-deja.com> wrote in message
>>news:755e968a.0410031718.36d14f87@posting.google.com...
>>...
>>| National Semiconductor says that each USB port must have a 120uF or
>>| larger ....................................... But my USB card has
>>| only a 100uF aluminum capacitor and maybe a ceramic capacitor in
>>| parallel for this....
>>
>>Close enough!
>
> Except the tantalum cap would have much lower esl & esr figures than an
> aluminum cap, making it more effective.
>
> otoh, tantalums can have a brilliant failure mode ;-)
So do engineers when they're bringing up a system where all
of the tantallums were inserted backwards. You want to see fireworks!
(well,it was 25 years ago - I've mostly recovered and the tinninus
isn't so bad. <twitch>)
-- Keith
- Next message: Salvatore: "Re: Best Electrolytic Cap for Audio/Computer Repair"
- Previous message: Andy Cuffe: "Re: Sony KV-27EXR25 Pincushion and No Picture Problem"
- In reply to: daytripper: "Re: USB port blew -- why?"
- Next in thread: David Maynard: "Re: USB port blew -- why?"
- Reply: David Maynard: "Re: USB port blew -- why?"
- Reply: NSM: "Re: USB port blew -- why?"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
