dual output power supply non isolated

Antonio Faggio

Expert 7900 points

Other Parts Discussed in Thread: LMR36503, LMR36506

Hi,

My motor drive customer is revisiting ACDC power supply that are 20 years old right now.

They are looking for dual output supply non -isolated input ±18 V ±5%, output ±15 V, 0,1 A.

Any ideas?

Many Thanks,

Antonio

over 5 years ago

0 Ethan T over 5 years ago

TI__Expert 3835 points

Hi Antonio,

Is the 18V coming from a regulate rail? Is there a need for wide vin buck converters up to 30-36V?

Are you looking for a single chip solution only?

Regards,

Ethan

0 Antonio Faggio over 5 years ago in reply to Ethan T

TI__Expert 7900 points

The 18 V comes from an unregulated output of a multi-output switching power supply. The maximum voltage should be slightly higher (5%) than the nominal one, so 30 - 36 V are abundant. The solution does not need to be on a single chip.

Many Thanks,

Antonio

0 Marshall_Beck over 5 years ago in reply to Antonio Faggio

TI__Mastermind 35210 points

Antonio,

How about two instances of LMR36506/LMR36503?

We can generate the positive output with typical buck and then configure second instance in inverting buck boost configuration for negative output.

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dual output power supply non isolated