[SOLVED] Problem with 78M12 and supplying Gate Driver IC

[ata90]

I implemented circuit in which 78M12 package is DPAK and can deliver up to 0.5A. After implementation, I encountered that 78M12 regulator get too hot. anybody know why and what is solution?

 

[betwixt]

Well, it dissipates 16W per Amp whch means it will get hot even at quite low current. Presumably you have it mounted or soldered down to a heat sink to keep it cool.
You should also have a capacitor across its input and ground pins to ensure stability, especially if the wiring to the power source is longer than a few cm.

Brian.

 

[tpetar]

My friend you have big dissipation on 78M12 regulator, you should read datasheet.

Measure real temp, use bigger copper area on PCB as heatsink.

 

[ata90]

therefore, for using 78M12, we always should use copper aria as heat-sink? actually I used copper aria, but because of limitation, it is around 4x4 mm2.
I presumed that maybe it is because of some problems with my design!

 

[tpetar]

78M12 is SMD package, it should be soldered to surface, best is copper surface on PCB.

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