Inquire about the XL4005 circuit

[AnwarB]

Hello
I assembled the XL4005E1 circuit
I want to reduce the voltage from 12 volt battery to 6 volt to run a 1 amp fan motor
But the voltage does not stabilize when the fan is turned on
Note that the diode used in MUR860 circuit, It warms up
What is the reason for the voltage instability?

 

[KlausST]

Hi,

We know your circuit uses MUR860 and XL4005...
we know nothing else. Not the schematic, not the other component values, not the other component parameters, nothing about heatsink, nothing about PCB layout...

Klaus

 

[Easy peasy]

the whole thing is very cheap and not designed to run at full power - they are mass produced and not necessarily tested before shipping - ergo, yours may well be faulty too ...

--- Updated Sep 12, 2020 ---

also your battery voltage may be dropping .... (?)

 

[AnwarB]

Sorry
Circuit in datasheet XL4005
Diode mur860 used it instead of 1N5824

 

[KlausST]

Hi,

No link to a datasheet..
There are several schematics in the datasheet I found... I don't know which one you are talking about
I can't find 1N5824 in the whole datasheet.

I'm out

Klaus

 

[FvM]

Still lack of information. "I assembled the circuit" doesn't clarify if you are using a kit or made your own PCB. Respectively any part can be faulty or wrongly dimensioned.

 

[AnwarB]

This is the scheme