Voltage Regulation Circuit

[imranahmed]

Please let me know that there is any circuit or IC for 220v input and output constant 5 volts or adjustable output.

 

[goldsmith]

Please let me know that there is any circuit or IC for 220v input and output constant 5 volts or adjustable output.

Hi imranahmed

Of course there are ! but it depends on how much current you need ?



Best Wishes
Goldsmith

 

[imranahmed]

Dear goldsmith,

Thank you for reply,

I need only 1 amps current.

If there is any please refer me.

 

[imran_199127]

You could try capacitor voltage transformer and then use the very popular 7805 series voltage regulator or any other DC-DC voltage regulator.

If you need a high efficiency then DC-DC Buck converter is what you need

 

[imranahmed]

Dear imran_199127

I know about 7805 and its input voltage is max=12v but I need voltage regulator its input voltage is 220v and output is constant 5v or regulated.

 

[TiagoRibeiro]

this is a good option for adjustable voltage source.;-)
https://www.ti.com/lit/ds/symlink/lm117.pdf

 

[FvM]

I presume 220V refers to 220V AC? In this case the most reliable and easy-to-make circuit is comprised of a transformer, rectifier, filter capacitor and voltage regulator IC. It has been discussed many hundred times at Edaboard.

 

[goldsmith]

Dear goldsmith,

Thank you for reply,

I need only 1 amps current.

If there is any please refer me.

Hi again
Directly ? 1 ampere ? just one linear IC ? it can be implemented but dissipation is unreasonable for this power .
There are some ways . as "FvM" mentioned transformer and .... is much reasonable here .
There are other ways too e.g using tops integrated circuits and designing and SMPS based on them but i think that's out of your experience and it will cost you more that a simple transformer and rectifier .
Good Luck
Goldsmith

 

[D.A.(Tony)Stewart]

Create a free account with TI and logon to save your designs. Analog Devices also has online design tools.

Here is one example from AC to 5V 2A DC