Hi,
i have a simple LM317H regulator with a pass transistor TIP32C.
I need to select a heat-sink for the TIP32C.
Normally i would look in the datasheet for the thermal resistance (something like 4C/Watt), but this value is missing.
I had a look at some other charts in the datasheet but I have not been able to deduce how to select the heat-sink I need.
I have calculate the power dissipation, of the TIP32C, by multiplying the voltage across it, times the current.
In my case is 45V x 0.4A=18W.
Can you please give me some help?
regards
Francesco C
i have a simple LM317H regulator with a pass transistor TIP32C.
I need to select a heat-sink for the TIP32C.
Normally i would look in the datasheet for the thermal resistance (something like 4C/Watt), but this value is missing.
I had a look at some other charts in the datasheet but I have not been able to deduce how to select the heat-sink I need.
I have calculate the power dissipation, of the TIP32C, by multiplying the voltage across it, times the current.
In my case is 45V x 0.4A=18W.
Can you please give me some help?
regards
Francesco C
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