Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Desing Laptop power supply

Status
Not open for further replies.

nadiro

Member level 1
Member level 1
Joined
Jul 23, 2012
Messages
34
Helped
3
Reputation
6
Reaction score
3
Trophy points
1,288
Visit site
Activity points
1,601
I have a question about laptop battery:

Imagine that we want to design a power supply circuit for a laptop,
we can provide the required number of 12V-5A batteries, the specifications of the laptop power supply adapter is inserted:

Input: 100-240 VAC 50Hz – 1.5A
Output: 19.5 VDC – 4.5A

How could we design the circuit in low expense and high quality?

How should this circuit be?

I like to know your ideas, what do you think about this?

Best regards
 

LinkSwitch-HP
http://www.powerint.com/products/linkswitch-family/linkswitch-hp

PI-6530_sized.gif




Best regards,
Peter
 
  • Like
Reactions: nadiro

    nadiro

    Points: 2
    Helpful Answer Positive Rating

Hello Dear Peter

I think this circuit convert AC to DC, am I right?
We can just use DC power supply as the input of the circuit (12V-5A batteries)

I have 2 ideas:
First, we can use DC batteries to provide AC voltage as input of the charger (convert DC to AC).

Second, by combination of some batteries produce the output voltage of the charger and directly charge the laptop (without its charger).

Which one is useful?

Do you have any other ideas?
 
Hello Dear Peter

I think this circuit convert AC to DC, am I right?
We can just use DC power supply as the input of the circuit (12V-5A batteries)

I have 2 ideas:
First, we can use DC batteries to provide AC voltage as input of the charger (convert DC to AC).

Second, by combination of some batteries produce the output voltage of the charger and directly charge the laptop (without its charger).

Which one is useful?

Do you have any other ideas?


Hi Nadiro,

Yes, its AC/DC converter.

For DC/DC converter is other circuit. Usually that converter should have adapter voltage for example 19V DC, to ensure charging of laptop battery.

Do you need DC/DC ?

Best regards,
Peter
 
  • Like
Reactions: nadiro

    nadiro

    Points: 2
    Helpful Answer Positive Rating
If I combine 2 batteries (12V-5A) it produce 24 V then how can I convert it to 19.5 VDC – 4.5A?

Best regards
 
If I combine 2 batteries (12V-5A) it produce 24 V then how can I convert it to 19.5 VDC – 4.5A?

Best regards


Some laptops can work direct on 12V Lead-Acid battery, connected instead original Li-Ion battery. Voltage of Li-Ion laptop batteries are around 10-14V, and voltage of 17-19V is used to ensure charging of Li-Ion Laptop battery.

There is many ways to make this, for example to make DC-DC converter which will boost voltage from 12V to 19V.

See examples:

12V / 15-21V car inverter for notebook
http://danyk.cz/noteb_en.html

noteb.png



95W Laptop PSU - 12V in, 19V 5A OUT - Published in Elektor magazine Januar, 2006.
**broken link removed**




Best regards,
Peter
 
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top