[hpsdr] PicoPSU

[Christopher T. Day]

picoPSU-60-WI:

Volts	(V)	Max Load (A)	Peak Load (A)	Regulation %
5V		6A			10A			1.5%
5VStand By	1.5A			2A			1.5%
3.3V		6A			8A			1.5%
-12V		50mA			50mA			5%
12V		400mA			450mA			3%

Overload protection cuts in when either major rail > 200% Max
Load.


picoPSU-120

Volts	(V)	Max Load (A)	Peak Load (A)	Regulation %
5V		6A			10A			1.5%
5VStand By	1.5A			2A			1.5%
3.3V		6A			8A			1.5%
-12V		50mA			100mA			5%
12V		7A			10A			=
Switched Input

Same overload protection.


Obviously, the higher power version(s) [there is also an 80W version]
provide the 12V by feeding through the switched supply; the real work is
in the 5V and 3.3V supplies. Unless one of the boards uses a lot of 12V
current, which Lyle was _not_ going to do, there is likely no difference
from our perspective => picoPSU-60-WI is the right one for us, I think,
subject to noise considerations.


	Chris - AE6VK


-----Original Message-----
From: Lyle Johnson [mailto:kk7p at wavecable.com] 
Sent: Thursday, June 08, 2006 8:11 PM
To: Eric Ellison
Cc: hpsdr at hpsdr.org
Subject: Re: [hpsdr] PicoPSU

***** High Performance Software Defined Radio Discussion List *****

> The 60/80W (80 watts peak) version uses a variable dc input from 6 to
26 
> VDC input which would be ideal for mobile use or powering off a 
> "station" power supply.

This would be my preferred solution.

It might be helpful to list the voltages and currents the supply is 
capable of.  I suspect most of the power is +5V or +3.3V.

> The 120 W version uses a fixed 12 V regulated power input and Chris
says 
> it drops out at 13+ volts.
> 
> Is 60W likely to be able to power 3 or 4 or more project boards?

Yes.  If we have a Tx that runs power, it will probably run from 13.8 
VDC or some other voltage, not supplied by or through the Atlas
backplane.

> Also how many folks would be interested in this type of supply.

If I knew it was sufficiently quiet to include a decent receiver in the 
same box, I'd be very interested.  But if it is noisy, then for many 
radio applications it wouldn't be suitable.  Like the old 
liner-to-switching-to-linear 5V regulator exercise we went through with 
the SDR-1000 back in '03.

73,

Lyle KK7P

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