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RE: PD power start up


My vote for #2.  


-----Original Message-----
From: Barry Male [mailto:male@xxxxxxxxxxxxxxxxxxxxxx]
Sent: Tuesday, March 27, 2001 2:36 AM
To: Dieter Knollman
Cc: Yair Darshan; stds-802-3-pwrviamdi@xxxxxxxx
Subject: Re: PD power start up


I vote for #2


Barry Male                            
Senior Principle IC Designer          Internet: barry_male@xxxxxx
Power Management Products             NH Phone: 603.429.8705
Texas Instruments                     CT Phone: 860.844.8183 
7 Continental Blvd.                   NH FAX  : 603.424.3460
Merrimack, NH  03054-0399 USA         CT FAX  : 860.844.8806

On Sat, 24 Mar 2001, Dieter Knollman wrote:

> Yair,
> I believe we have two choices.
> Choice 1:  Define a special start up case for the PD.
>     In this state the PD is allowed to violate steady state requirements.
>     The PD may drop the line voltage to zero.
>     The PD may draw any current level.
>     The PSE will supply current at a level about 1.5 times the steady
> value.
>     The time for the start up state is limited to X ms.
> Choice 2: The PD meets steady state requirements.
>     In order to receive power
>         the PD input voltage is >30 volts and
>         the PD current is >10ma and <350ma.
> Some violations are allowed for Y ms.
> Can we have a straw poll?
> Dieter