Hi all : )
I'm using LM317T (TO-220) to generate 14V DC from a 24 V DC SMPS. my load current is 300mA.
At start the regulator ic gives 14V at its output precisely. But the output started dropping as the ic started heating.
within 5 minutes the output dropped from 14V to 13.7V and the ic got very hot.
I applied heat sink to it. It worked fine.
i tested the circuit for 20 minutes with same constant load current of 300mA.
the output dropped from 14V to 13.96V only.
Fair enough.
But the heat sink got fairly Hot
My concern is I want to know how much reliable this circuit is.
the circuit will be ON for 5 to 6 hours continuosly daily and will be used for years.
what steps should i take to reduce the heating ??
I'm using LM317T (TO-220) to generate 14V DC from a 24 V DC SMPS. my load current is 300mA.
At start the regulator ic gives 14V at its output precisely. But the output started dropping as the ic started heating.
within 5 minutes the output dropped from 14V to 13.7V and the ic got very hot.
I applied heat sink to it. It worked fine.
i tested the circuit for 20 minutes with same constant load current of 300mA.
the output dropped from 14V to 13.96V only.
Fair enough.
But the heat sink got fairly Hot
My concern is I want to know how much reliable this circuit is.
the circuit will be ON for 5 to 6 hours continuosly daily and will be used for years.
what steps should i take to reduce the heating ??