lnk306 drop down problem
hello
i need non-isolate small power supply 5v /peak 320 mA .i use lnk306 but ther is problem that when i connect just a LED the voltage drop down about 1 volt.
and when i connect the lnk306 to my mcu and board it need 70ma...but the voltage drop down about 3 volt!
i thouth that when i use lnk306 .i have 5 volt...and can run at least 200ma circuit!
but now when i connect a load the voltage decrease!!
i uploud my circuit .....please help me on this topic ...
Comments
I tried to design a 3.3 VDC and 250mA Output.
It looks the direct feedback is not suitable for precision. Right now I am changing the direct feedback for optocoupler feedback.
In my case with a 33ohm resistor, the voltage drop up 2Volts.
Hero.seller,
Could you please test the power supply with Resistive load and confirm that output voltage is dropping. Also connect your LED with a series resistance of 5K and see whether the voltage drops?
nobody cant help me????!!!