28335 Viberation and shock

lee moon gyou

Prodigy 40 points

Other Parts Discussed in Thread: TMS320F28335, SM320F28335-EP

Hello.

I'm using the TMS320F28335.

How about does it work in mechanical viberation and shock?

Waiting for your reply.

over 12 years ago

0 Gautam Iyer over 12 years ago

Guru 192875 points

Hi,

You mean to say mechanical and shock test of this IC ?

Regards,

Gautam

0 lee moon gyou over 12 years ago in reply to Gautam Iyer

Prodigy 40 points

Thanks Gautam.

I want to know the 28335's range of viberation and shock.

Regards,

Lee

0 Gautam Iyer over 12 years ago in reply to lee moon gyou

Guru 192875 points

Hi Lee,

Can you list out your application? Because this IC works perfectly fine under any kind of vibrations and shocks.

Regards,

Gautam

0 lee moon gyou over 12 years ago in reply to Gautam Iyer

Prodigy 40 points

Sure.

We use the IC for unmanned helicopter.

<Specs.>

Engine RPM = 5600 = 93.3Hz (Dominant vibration)

Rotor RPM = 810 second vibration

Weight = about 100kg

Max flight speed = 20km/h (so slow)

Flight height = about 5m from ground

Max temperature in the control box = 40 C

Total flight time = 50 hours.

Regards,

Lee

0 Gautam Iyer over 12 years ago in reply to lee moon gyou

Guru 192875 points

Hi Lee,

I've used MSP430 family ICs that are 16-bit low-end controllers for automotive based applications; that can sustain heavy vibrations and shocks. TMS series is a 32-bit high-end DSP controller that has more stricter norms.

No need to worry! Go ahead :)

Regards,

Gautam

0 Bogdan Kokotenko over 11 years ago in reply to Gautam Iyer

Prodigy 40 points

Hello Gautam,

I am looking for MCU which is tolerant to mechanical shock. Please, share details of the maximal vibration and mechanical shock level which was in your application. My device has to tolerate shock up to 10 000 g. What IC’s package (LQFP, BGA etc.) is more suitable for such application? Any information will be very helpful.

Best regard,
Bogdan

0 Brett Larimore over 11 years ago in reply to Bogdan Kokotenko

TI__Guru 57255 points

Bogdan,

From one of our reliability experts:
I don't expect to see an issue with the package itself. For solder joint reliability, the QFP will provide the most robust solution.

You could also select a SM320F28335-EP (enhanced product) device which is qualified/tested under more scrutiny for aerospace/defense applications. It will be manufactured with a stronger solder type as well.

Thank you,
Brett

0 Brett Larimore over 11 years ago in reply to Brett Larimore

TI__Guru 57255 points

I also want to mention that because our chip is not tested under high-g conditions , more testing/validation may be necessary on your side.

-Brett

0 Bogdan Kokotenko over 11 years ago in reply to Brett Larimore

Prodigy 40 points

Hello Brett,

thank you for your reply. I am really interested in using SM320F28335-EP. However, my customer is very strict. So I have to provide available information before they approve additional mechanical tests. Would you be so kind to ask your experts for SM320F28335-EP reliability qualification report?

Additionally, I had requested the same information from Semiconductor Technical Support Department before you replied.

Thank you in advance,
Bogdan

0 Brett Larimore over 11 years ago in reply to Bogdan Kokotenko

TI__Guru 57255 points

Bogdan,

On the webpage for this particular chip, you will find the reliability reports under the "More Literature" section of the "Technical Documents" tab.

I got a bit of extra guidance in response to your previous question: you'll also need to use a proper board adhesive. Not too hard or the package body can crack but not too soft or leads & solder joints can be broken.

Thank you,
Brett

0 Bogdan Kokotenko over 11 years ago in reply to Brett Larimore

Prodigy 40 points

Brett,

Thank you for providing the requested information.

Regards,
Bogdan

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28335 Viberation and shock