Power Supply for PGA280

Pavan Kumar15649

Other Parts Discussed in Thread: PGA280, TPS65120

Can any one suggest the simple power supply as required for PGA280 based on 12V battery input power. Datasheet says it requires a dual power for input, a single power for output stage and a digital power source, total 4 power inputs in all as minimum.

Expecting a simple method to get +/-9V DC from 12V input, altough +12V can be directly connected but a regulated supply is supposed to be best for low drift in offset voltage.

Any suggestions?

Regards

Pavan

over 15 years ago

0 Roman Ogirko over 15 years ago

Prodigy 20 points

You can use any DC/DC converter for main power (for example 12V to 5V) and next TPS65120 for PGA280 supply.

0 Pavan Kumar15649 over 15 years ago in reply to Roman Ogirko

Prodigy 30 points

Thanks for the Reply

Can you suggest part where I have to use 8 nos of PGA280 on same board, considering single power source for all. I believe tps65120 may not give power to 8 nos of PGA280.

0 Roman Ogirko over 15 years ago in reply to Pavan Kumar15649

Prodigy 20 points

You can use two MC33063 switch-mode DC/DC converters in step-down and inverting mode. I advise set linear regulators (UA78xx/UA79xx) after switch-mode converters for best perfomens.

0 simon katich over 15 years ago in reply to Roman Ogirko

Prodigy 10 points

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Power Supply for PGA280