TPS55340: My first prototyping with TPS55340PWP

Bernd Benninghofen

Prodigy 40 points

Part Number: TPS55340

Hello,

I'm going to develop a step up converter and mounted my first wiring via flying wires.

It works well but it starts only when I switch on/of the power several times!

Is it possible that the wires are too long and too fare away from the TPS55340PWP?

Thank you for any help,

Bernd

over 7 years ago

0 EricLee over 7 years ago

TI__Guru 58171 points

Hi
It is possibly caused by poor layout and long wiring. Please refer www.ti.com/.../tps55340evm-017
Regards,
EL

0 Bernd Benninghofen over 7 years ago in reply to EricLee

Prodigy 40 points

Hi,
Thank you for your quick answer!
On the first site of the datasheet there is a "Typical Application (Boost)" with a 14 pin TPS55430.
There are 3 "SW-pins" but there are only 2 SW pins (1, 2) in the datasheet?!
Pin 11 "NC" is on ground, I think.

Thanks and Regards,
Bernd

0 EricLee over 7 years ago in reply to Bernd Benninghofen

TI__Guru 58171 points

Please refer QFN-16 pin out in the datasheet.

Regards,
EL

0 Bernd Benninghofen over 7 years ago in reply to EricLee

Prodigy 40 points

Hello,

Is any body here to give me some answer's about a 14pin TPS55340???

Regards,

Bernd

0 Bernd Benninghofen over 7 years ago in reply to Bernd Benninghofen

Prodigy 40 points

A forum without help, what's this??

0 Youhao Xi over 7 years ago in reply to Bernd Benninghofen

TI__Guru* 78060 points

Hi Bernd,

The typical application refer to the 16 pin package which has three SW pins. It has been clearly mentioned in the datasheet that the 14-pin package has two SW pins: Please refer to both the pin diagram and pin functions on page 3 of the datasheet. Or I misunderstood your question?

Thanks,
Youhao Xi, System and Applications Engineering, APP-BMC-BCS

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TPS55340: My first prototyping with TPS55340PWP