Layout of the LM3414HV

Mark Witt

Other Parts Discussed in Thread: LM3414HV

Hello,

I am designing a metal core lighting board using 4 LM3414HV circuits each driving a string of white LEDs. My question is regarding the PCB layout. I noticed that the recommended layout has no routing on the bottom side of the board except for the ground plane. I was wondering if it was possible to design my board using only 1 layer with no ground plane on the bottom. I was planning on electrically isolating the metal core from the circuit. Is this possible without risking performance issues? Would it work if I tied circuit ground to the metal core? Is this recommended?

Thanks,

Mark

over 9 years ago

0 Irwin Nederbragt over 9 years ago

TI__Mastermind 28655 points

Hello,

You should be able to create a layout that works correct on a metal core board. If you tied the metal portion to the ground it would act like a ground plane but you should still be able to create a layout that works without that connected. Be aware that the parasitic capacitance is much higher on metal clad board due to the thin dielectric. Noise can couple from and to traces and pads on the layout.

Thanks,

0 Mark Witt over 9 years ago in reply to Irwin Nederbragt

Prodigy 100 points

Thanks Irwin!

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Layout of the LM3414HV