Ultra thin power supply for laptop
I'm not sure how to tell what kind of "tip" I might need for my laptop adapter but I am looking for an adapter small and light-weight enough to carry right on top of the laptop which I want to be able to carry in a small laptop sleeve. It needs to be thin enough that it won't create too much extra bulk or require an extra compartment and cheap enough to make it make sense.
Assistance is greatly appreciated.
Toshiba Satellite L305-S5917
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=SB&os=&category=&moid=2211884&rpn=PSLB8U&modelFilter=L305-S5917&selCategory=2756709&selFamily=1073768663
Assistance is greatly appreciated.
Toshiba Satellite L305-S5917
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=SB&os=&category=&moid=2211884&rpn=PSLB8U&modelFilter=L305-S5917&selCategory=2756709&selFamily=1073768663
cwstad2
I dont think you will get one smaller than the one that is supplied. The power supplied are directly proprtional to the power which they consume.
http://www.amazon.com/UNIVERSAL-ADAPTER-Notebook-Charger-TOSHIBA/dp/B0026ZKSR2
There are universal ones you can get. Just make sure you have enough in terms of wattage.
There are universal ones you can get. Just make sure you have enough in terms of wattage.
See Toshiba charger for an example of a replacement power pack unit for your laptop.
Even the standard Toshiba unit will be similar. You can't get away from the bulk of the power pack unit on the cord - you've got a small transformer plus associated components packed in there. That has to change AC to DC for your laptop.
You will need a bag that has room for that power unit.
Even the standard Toshiba unit will be similar. You can't get away from the bulk of the power pack unit on the cord - you've got a small transformer plus associated components packed in there. That has to change AC to DC for your laptop.
You will need a bag that has room for that power unit.
ASKER
Specs say 75W (19V x 3.95A). Surely there is a universal that is made especially thin.
dont forget you will need the correct adaptor too. Manufactures have a bad habbit of changing the shape frequently so that there is no universal standard.
>> Surely there is a universal that is made especially thin.
No.
A universal is far more bulky as it has to cater for different voltages and amperages.
Your laptop requires 19 volts with 3.5 amps. That requires a hefty power supply and which requires a hefty converter. The power transformer within is built to a specifc shape, roughly cube shaped. There is a reason for that, efficiency. You can't make thin efficient transformers. The components within are also large, they have to be to handle the power demands and conversion.
So, again, no, you can't have a thin converter.
No.
A universal is far more bulky as it has to cater for different voltages and amperages.
Your laptop requires 19 volts with 3.5 amps. That requires a hefty power supply and which requires a hefty converter. The power transformer within is built to a specifc shape, roughly cube shaped. There is a reason for that, efficiency. You can't make thin efficient transformers. The components within are also large, they have to be to handle the power demands and conversion.
So, again, no, you can't have a thin converter.
What you are looking for isn't out there.
You are physically limited by the size of the internal components. A typical 110/220VAC to DC laptop adaptor will contain copper windings which step down the voltage and some pretty big capacitors. The narrowest you're going to manage is around 1.5cm, you may get the volume down though, look at the Apple adaptops for example which instead of the traditional laying everything out in a line set the components in a square arrangement which makes for a smaller (but thicker) adaptor.
You are physically limited by the size of the internal components. A typical 110/220VAC to DC laptop adaptor will contain copper windings which step down the voltage and some pretty big capacitors. The narrowest you're going to manage is around 1.5cm, you may get the volume down though, look at the Apple adaptops for example which instead of the traditional laying everything out in a line set the components in a square arrangement which makes for a smaller (but thicker) adaptor.
Confirmed with all the above. Best you can do is just find one that is "good enough" for you to deal with. When it comes to laptops, the power supply is the "brick" connected to the wall. Unfortunately, thats as small/thin as they go. No matter what laptop you have, they all fall slave to the brick. =P
There are universal notebook power adapters which are about half the thickness of "standard" adapters. They have increased width to accommodate necessary components. The ones I've seen were manufactured by Kensington (pricey) and SPI. I imagine there are others.
If you're in the USA, check what is available from Newegg.
If you're in the USA, check what is available from Newegg.
ASKER
Thanks to all for the info.
willcomp, thank you
This one from targus looks like a possible alternative as well http://www.targus.com/us/productdetail.aspx?regionId=7&sku=APA69US&PageName=Chargers%20for%20Laptops%20&%20Portables%20by%20Targus&productCategoryId=23&bucketTypeId=0&searchedTerms=&navlevel1=products&cp=&bannertxt=Chargers%20for%20Laptops%20%26%20Portables
They even have a video.
Still researching though...
willcomp, thank you
This one from targus looks like a possible alternative as well http://www.targus.com/us/productdetail.aspx?regionId=7&sku=APA69US&PageName=Chargers%20for%20Laptops%20&%20Portables%20by%20Targus&productCategoryId=23&bucketTypeId=0&searchedTerms=&navlevel1=products&cp=&bannertxt=Chargers%20for%20Laptops%20%26%20Portables
They even have a video.
Still researching though...
ASKER CERTIFIED SOLUTION
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It is possible to make flat transformers, see e.g. http://www.ferroxcube.com/appl/info/plandesi.pdf , but I imagine the thinnest manufactured size for the box would still be 1 cm or more. It would also get expensive, since there are so many specialized (thin) components that would be required. Like the capacitors would need to be low-ish value to fit in the form factor, so there would have to be a large number to make up the total.
I wonder if there is much demand for such a power supply?
I wonder if there is much demand for such a power supply?
ASKER
ok
Don't understand why that answer was accepted and why points weren't split.