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HOW TO Convert 12v to 13v

Usamaj

Jul 14, 2022
13
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Jul 14, 2022
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i am working on ups for the router i have some questions
1. i am using lithium battery 3s whose output when full charged is 12.6 so i need 13v to charge it i have adopter 12.22v i need to boost the voltage is there any way which transfer is best that work without producing too much heat i don't want to use xl6009 or any module ... just simple circuit.

2. 12v*1.5a= 18watt == 9v*2a = 18watt. what if i give 9v 2amp to a 12v load is it work?
 

crutschow

May 7, 2021
469
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May 7, 2021
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To increase a voltage you need a boost (or buck-boost) switching regulator.
As Harold noted, an off-the-shelf module will be the simplest and cheapest way to do that.
Otherwise buy an adapter with a higher voltage.
 

Usamaj

Jul 14, 2022
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Jul 14, 2022
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Thanks for your response is it possible to modify the adopter?
 

Martaine2005

May 12, 2015
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Not without opening it.
Is it like a laptop power supply or a phone charger/PSU? Or a heavy little walwart?


Martin
 

Usamaj

Jul 14, 2022
13
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Jul 14, 2022
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it is a router adopter
 

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Martaine2005

May 12, 2015
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That’s a SMPS. I doubt you can alter it . Get another adapter with a higher voltage. Or a linear transformer. Or of course a boost converter.


Martin
 

ivak245

Jun 11, 2021
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Jun 11, 2021
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Have you actually measured the output of the plug pack? They may say 12VDC, but the no-load voltage could be as high as 16vdc. Then you just need to go through a variable 3 terminal voltage regulator, as long as the under load voltage is above 13 volts.
 

Martaine2005

May 12, 2015
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Have you actually measured the output of the plug pack? They may say 12VDC, but the no-load voltage could be as high as 16vdc. Then you just need to go through a variable 3 terminal voltage regulator, as long as the under load voltage is above 13 volts.
The power supply shown is most definitely a SMPS.


Martin
 

CircutScoper

Mar 29, 2022
298
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Mar 29, 2022
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298
it is a router adopter

Pry it open and take some photos of both sides of the circuit board. It's just possible the brainacs here (not me!) will be able to suggest a workable modification -- provided you're good at soldering.
 
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