Damn it. Voltage on 13.8v PSU too high... - Page 2

Butcher · 03-24-2006, 07:05 PM

Don't forget to heatsink it.

Also note you won't be able to get more than ~12V out of the regulator with a 14.8V supply. If you just want to drop around a volt (i.e. get ~13.8V) then you could use two diodes in series on the output. A silicon diode has a voltage drop of about 0.6V so that would drop 1.2V giving you 13.6-13.7V. You'll need to chose diodes with suitable current handling capabilities - 5A or better.

JamesAvery22 · 03-27-2006, 03:51 PM

I just got a tripplite brand new. PR4.5 IIRC. Its been running 24.7 on the two pumps for a week now. Gets pretty hot but voltage stays right at 13.8 on load. I opened it up and the design is actually pretty similar. I got it for $35 delivered so I cant really complain. I'll mess with that other one when I get the time.

the jew (raven) · 04-02-2006, 01:44 AM

Just sell it to me cheap as a pelt power supply

03-24-2006, 07:05 PM	#26
Butcher Thermophile Join Date: May 2001 Location: UK Posts: 1,064	Re: Damn it. Voltage on 13.8v PSU too high... Don't forget to heatsink it. Also note you won't be able to get more than ~12V out of the regulator with a 14.8V supply. If you just want to drop around a volt (i.e. get ~13.8V) then you could use two diodes in series on the output. A silicon diode has a voltage drop of about 0.6V so that would drop 1.2V giving you 13.6-13.7V. You'll need to chose diodes with suitable current handling capabilities - 5A or better. __________________ Once upon a time, in a land far far away...

03-27-2006, 03:51 PM	#27
JamesAvery22 Cooling Savant Join Date: May 2004 Location: Northern VA Posts: 383	Re: Damn it. Voltage on 13.8v PSU too high... I just got a tripplite brand new. PR4.5 IIRC. Its been running 24.7 on the two pumps for a week now. Gets pretty hot but voltage stays right at 13.8 on load. I opened it up and the design is actually pretty similar. I got it for $35 delivered so I cant really complain. I'll mess with that other one when I get the time. __________________ Stabbing. My Heatware

04-02-2006, 01:44 AM	#28
the jew (raven) Cooling Neophyte Join Date: Nov 2003 Location: Where hockey pucks fly free Posts: 12	Re: Damn it. Voltage on 13.8v PSU too high... Just sell it to me cheap as a pelt power supply

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