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help me i need power supply circuit 24A 5A
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ibrahem_mo



Joined: 13 Jul 2008
Posts: 5
Post13 Jul 2008 3:12   

24v power supply circuit
hi
please help me
i need or so much need
psu circuit 24V 5A
regards
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kiprono



Joined: 18 Nov 2005
Posts: 246
Helped: 15
Location: Nairobi
Post13 Jul 2008 7:03   

lm338k regulator power supply circuits
Is it dc or ac?
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Post13 Jul 2008 7:03   

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unkarc



Joined: 28 Apr 2001
Posts: 287
Helped: 36
Post13 Jul 2008 14:02   

switch lm338k power supply
ibrahem_mo wrote:
hi
please help me
i need or so much need
psu circuit 24V 5A
regards


hi,

The question from kiprono meant your input voltage is AC or DC into the psu?

Putting it otherwise, you operate it from the mains or from a DC source?

In case you feed it from the mains, here is a circuit for a linear psu:

http://www.elecfree.com/circuit/power-supply/lm338k-adjustable-power-supply/

If you do not have 120V AC mains voltage in your country but have 220-240V, then the transformer T1 should be chosen accordingly.

If you wish to build a switch mode power supply instead of the above linear one, here is one possibility out of many:

http://uk.nuhorizons.com/news/dfiles/4607f.pdf

In this case the input voltage should be any DC between 5V - 36V and efficiency is over 90% or so, no need for big heat sink area, unlike in case of the above linear psu circuit. (So any mains transformer of 10V-24V AC output @5A with rectifier bridge and a suitable puffer cap should do.)

Here are some other choices for switch mode ICs you can choose from, of course other manufacturers are also an option:
http://www.linear.com/pc/categoryProducts.jsp?vin_min=26&vin_max=36&qpsActive=true&action=INITIAL&vout=24&filterOnInit=true&iout=5&navId=H0%2CC1%2CC1003%2CC1042&referringUrl=%2Fpc%2FviewCategory.jsp&y=10&x=30

rgds, unkarc
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Awarapunshee



Joined: 11 Jul 2007
Posts: 455
Helped: 60
Post13 Jul 2008 15:07   

lm338k circuit
ibrahem_mo wrote:
hi
please help me
i need or so much need
psu circuit 24V 5A
regards


You forgot to write the input voltage
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ibrahem_mo



Joined: 13 Jul 2008
Posts: 5
Post13 Jul 2008 15:24   

Re: help me i need power supply circuit 24A 5A
iam sorry
input voltag is 220 ac 4a
output i need is 24v dc 5A

Added after 4 minutes:

unkarc wrote:
ibrahem_mo wrote:
hi
please help me
i need or so much need
psu circuit 24V 5A
regards


hi,

The question from kiprono meant your input voltage is AC or DC into the psu?

Putting it otherwise, you operate it from the mains or from a DC source?

In case you feed it from the mains, here is a circuit for a linear psu:

http://www.elecfree.com/circuit/power-supply/lm338k-adjustable-power-supply/

If you do not have 120V AC mains voltage in your country but have 220-240V, then the transformer T1 should be chosen accordingly.

If you wish to build a switch mode power supply instead of the above linear one, here is one possibility out of many:

http://uk.nuhorizons.com/news/dfiles/4607f.pdf

In this case the input voltage should be any DC between 5V - 36V and efficiency is over 90% or so, no need for big heat sink area, unlike in case of the above linear psu circuit. (So any mains transformer of 10V-24V AC output @5A with rectifier bridge and a suitable puffer cap should do.)

Here are some other choices for switch mode ICs you can choose from, of course other manufacturers are also an option:
http://www.linear.com/pc/categoryProducts.jsp?vin_min=26&vin_max=36&qpsActive=true&action=INITIAL&vout=24&filterOnInit=true&iout=5&navId=H0%2CC1%2CC1003%2CC1042&referringUrl=%2Fpc%2FviewCategory.jsp&y=10&x=30

rgds, unkarc


thank you
the input is 220v 4A AC can you help me with useful circuit
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unkarc



Joined: 28 Apr 2001
Posts: 287
Helped: 36
Post13 Jul 2008 16:35   

Re: help me i need power supply circuit 24A 5A
ibrahem_mo wrote:

thank you
the input is 220v 4A AC can you help me with useful circuit


@ibrahim_mo

In my links I referred to useful circuits. I cannot help with even more useful circuits, those are just the useful ones for your problem. You need further study in this psu topic, I wish you good luck.

unkarc
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Awarapunshee



Joined: 11 Jul 2007
Posts: 455
Helped: 60
Post13 Jul 2008 18:23   

Re: help me i need power supply circuit 24A 5A
You can use UC3842 or UC3843 etc for your application. Following is the circuit you can modify a little and can get ur required output.

LINK

Enjoy!
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ibrahem_mo



Joined: 13 Jul 2008
Posts: 5
Post13 Jul 2008 18:35   

Re: help me i need power supply circuit 24A 5A
unkarc wrote:
ibrahem_mo wrote:

thank you
the input is 220v 4A AC can you help me with useful circuit


@ibrahim_mo

In my links I referred to useful circuits. I cannot help with even more useful circuits, those are just the useful ones for your problem. You need further study in this psu topic, I wish you good luck.

unkarc


iam sorry
i read your topic but my input is 4A and i need the output is 5A
your circit is 5A in and 5A out
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unkarc



Joined: 28 Apr 2001
Posts: 287
Helped: 36
Post13 Jul 2008 18:58   

Re: help me i need power supply circuit 24A 5A
[quote="ibrahem_mo"][quote="unkarc"]
ibrahem_mo wrote:


iam sorry
i read your topic but my input is 4A and i need the output is 5A
your circit is 5A in and 5A out


I do not understand where you take the 5A in and which circuit do you mean exactly??
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ibrahem_mo



Joined: 13 Jul 2008
Posts: 5
Post13 Jul 2008 19:17   

Re: help me i need power supply circuit 24A 5A
[quote="unkarc"][quote="ibrahem_mo"]
unkarc wrote:
ibrahem_mo wrote:


iam sorry
i read your topic but my input is 4A and i need the output is 5A
your circit is 5A in and 5A out


I do not understand where you take the 5A in and which circuit do you mean exactly??

i mean
your link
http://www.elecfree.com/circuit/power-supply/lm338k-adjustable-power-supply/
has a 5A transformer and the output is 5A
but my transformer is 4A and i want 5A for 24v dc output
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unkarc



Joined: 28 Apr 2001
Posts: 287
Helped: 36
Post13 Jul 2008 19:50   

Re: help me i need power supply circuit 24A 5A
What is your transformer secondary AC voltage output when you load it with 4A?
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