smartsarath2003
Member level 4
Hello,
I built a small LM338 regulator Ckt. The problem I am facing is the output voltage going down slowly when i leave the load ON. Is this happening because of temp. I connected a load of 220R at 24V output, so it not too much current actually. Does anyone have anyidea why is this happening and how can we prevent this :?:
I checked the LM338 datasheet and its given that the Vref , Iadj goes up by temp. From this can I conclude that the variation in Iadj is more than variation in Vref and thats why the regulator is pulling its output down to maintain 1.25V. Looks little bit confusing :roll:
Any Help Please.........................
Thanks
I built a small LM338 regulator Ckt. The problem I am facing is the output voltage going down slowly when i leave the load ON. Is this happening because of temp. I connected a load of 220R at 24V output, so it not too much current actually. Does anyone have anyidea why is this happening and how can we prevent this :?:
I checked the LM338 datasheet and its given that the Vref , Iadj goes up by temp. From this can I conclude that the variation in Iadj is more than variation in Vref and thats why the regulator is pulling its output down to maintain 1.25V. Looks little bit confusing :roll:
Any Help Please.........................
Thanks