DC-DC Converter

timk9 · 03-12-2006, 10:20 AM

I tried googling to find this answer but ended up finding technical documents way over my head on what I thought would be a very simple question...

Are there any small gizmos I can put on a wire inside a computer to convert 12v DC to 9v DC? I could easily mod a car-cigarette-lighter adapter but I want something small.

Thanks!
Tim

**Fr4665** · 03-12-2006, 12:08 PM

i believe you would have to make your own voltage regulator with some transistors resistors etc. it is complicated to make your own.

also check this link out it might need some explaining but it is pretty simple to make once you understand it
http://www.uoguelph.ca/~antoon/circ/car912.htm
R = resistor
C = capacitor(?)
the rest im kinda trying to figure out what they are

also look at phone chargers, find a phone that needsa 9v source and then find a charger for that phone. then you have your 12v input and 9v output
click this link for a 12v to 9v car adapter which you can easily cut up and modify to fit your needs
http://www.powerstream.com/dc6.htm

kanna · 04-24-2006, 11:51 PM

:

Hi folks,

I'm a newbie to this forum. Iv gone through some of the discussions
its quite interesting.

I'm designing a circuit in which the input voltage range is 13.5 to 28V,max of output current 1A and outputs 15V@400mA,5V@100mA,3.3V@50mA.I'v used this below mentioned configuration : Generating 5V using LM3100 switcher from inupt of 13.5V to 28V. Then use this 5V to generate 15 and 3.3V using LM2704 and LP3990 respectively.

As you people know the the external components like inductors, caps occupy most of ur pcb space which is the main problem faced by me.
can any one suggest me the better configuration with miniature and less components.

It is a immediate requirement. pleas help

regards and thanks in advance
kanna

manofsorrow · 05-10-2006, 11:11 PM

that circuit is actually fairly simple in all reality. I cant quite remember what Q is but Ill edit this post if it comes back to me. Z should be a zener diode.

ChrisSmith · 08-24-2009, 01:09 PM

I had a few problems trying to figure out where to get good dc dc converters. I found one place but they deal way more in bulk for DC DC Converters. Does any one know of any other places to get them?

tub18 · 11-21-2009, 02:47 AM

You may try this site for DC-DC Converters www.digilogsystems.com

03-12-2006, 10:20 AM	#1 (permalink)
timk9 Registered User Join Date: Feb 2006 Location: Lockport, NY, USA Posts: 58 OS: XPPro, XPPro X64, 98, DOS, MacOSX, various Linuxes	DC-DC Converter I tried googling to find this answer but ended up finding technical documents way over my head on what I thought would be a very simple question... Are there any small gizmos I can put on a wire inside a computer to convert 12v DC to 9v DC? I could easily mod a car-cigarette-lighter adapter but I want something small. Thanks! Tim

03-12-2006, 12:08 PM	#2 (permalink)
Fr4665 aka mr.fraggs Join Date: Nov 2004 Location: USA or Germany Posts: 2,965 OS: Win XP,Vista,Android My System	i believe you would have to make your own voltage regulator with some transistors resistors etc. it is complicated to make your own. also check this link out it might need some explaining but it is pretty simple to make once you understand it http://www.uoguelph.ca/~antoon/circ/car912.htm R = resistor C = capacitor(?) the rest im kinda trying to figure out what they are also look at phone chargers, find a phone that needsa 9v source and then find a charger for that phone. then you have your 12v input and 9v output click this link for a 12v to 9v car adapter which you can easily cut up and modify to fit your needs http://www.powerstream.com/dc6.htm __________________ I don't subscribe to threads please PM me if i miss a reply. ------- Everest SensorView Pro DriverCleaner how to fix your game

04-24-2006, 11:51 PM	#3 (permalink)
kanna Registered User Join Date: Apr 2006 Posts: 1 OS: WinXP	Hi folks - dc to dc conversion-URGENT : Hi folks, I'm a newbie to this forum. Iv gone through some of the discussions its quite interesting. I'm designing a circuit in which the input voltage range is 13.5 to 28V,max of output current 1A and outputs 15V@400mA,5V@100mA,3.3V@50mA.I'v used this below mentioned configuration : Generating 5V using LM3100 switcher from inupt of 13.5V to 28V. Then use this 5V to generate 15 and 3.3V using LM2704 and LP3990 respectively. As you people know the the external components like inductors, caps occupy most of ur pcb space which is the main problem faced by me. can any one suggest me the better configuration with miniature and less components. It is a immediate requirement. pleas help regards and thanks in advance kanna

05-10-2006, 11:11 PM	#4 (permalink)
manofsorrow Registered User Join Date: Feb 2006 Posts: 89 OS: winxp	that circuit is actually fairly simple in all reality. I cant quite remember what Q is but Ill edit this post if it comes back to me. Z should be a zener diode. __________________ Asus A8N-E mobo Benq light scribe dvd-rw Amd athlon x2 4400+ @ 2.8 ghz 2x 160 gig hard drives in RAID 0 array water cooled 4x 80mm case fans controlled by a Vantec controller 42" LG plasma monitor Idle temp. 28C load temp. 34C (on average) Fully sleeved etc.

08-24-2009, 01:09 PM	#5 (permalink)
ChrisSmith Registered User Join Date: Aug 2009 Posts: 1 OS: vista	Re: DC-DC Converter I had a few problems trying to figure out where to get good dc dc converters. I found one place but they deal way more in bulk for DC DC Converters. Does any one know of any other places to get them?

11-21-2009, 02:47 AM	#6 (permalink)
tub18 Registered User Join Date: Nov 2009 Posts: 1 OS: xp 3	Re: DC-DC Converter You may try this site for DC-DC Converters www.digilogsystems.com