Selvam_Perumal
Junior Member level 2
I am looking for an external bias circuit for my SMPS whose Vcc is 12V to 15V@ 10mA.
But my input voltage is only 340V.
Zener regulator will result in the continuous power dissipation of nearly 5W.
To avoid the continuous power dissipation,Can you suggest the suitable circuit which will provide start up supply for my SM
PS Vcc.After that Vcc will be derived from the auxillary winding.
Once Vcc is derived from auxillary winding,start up regulator has to be disabled to avoid power dissipation.
But my input voltage is only 340V.
Zener regulator will result in the continuous power dissipation of nearly 5W.
To avoid the continuous power dissipation,Can you suggest the suitable circuit which will provide start up supply for my SM
PS Vcc.After that Vcc will be derived from the auxillary winding.
Once Vcc is derived from auxillary winding,start up regulator has to be disabled to avoid power dissipation.