Question regarding to PTN78020A

David Zhang16358

Expert 1860 points

Other Parts Discussed in Thread: PTN78020A, TPS54240, TPS54260, TPS5450

I want -17V output, do you have power module similar as PTN78020A to output -17V?

Many thanks.

over 12 years ago

0 Tom Guerin over 12 years ago

TI__Mastermind 38230 points

David:

There is no -17V inverter power module from a (+) input power source. The maximum inverter voltage from the PTN78N series is -15V with maximum +input voltage of 17V.

One suggestion is to use the TPS54240 (Page 40) or TPS54260 swift IC for inverting the output voltage along with SLVA317a application note

http://www.ti.com/product/tps54240

http://www.ti.com/general/docs/litabsmultiplefilelist.tsp?literatureNumber=slva317a

Tom

0 David Zhang16358 over 12 years ago in reply to Tom Guerin

Expert 1860 points

Many Thanks.

0 David Zhang16358 over 12 years ago in reply to Tom Guerin

Expert 1860 points

May I do the same thing to TPS5450?

Thanks.

0 Tom Guerin over 12 years ago in reply to David Zhang16358

TI__Mastermind 38230 points

David:

It appears the TPS54240 is newer swift IC. The question on whether to use the TPS5450 ro TPS54240/260 for -17V should sent to the SWIFT group.

I appears the TPS54240 is rated to 2.5A and the TPS5450 is rated to 5Amps .

The other factors to be considered in the (-) configuration is the maximum power capability.

Tom

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Question regarding to PTN78020A