TPS562219A: Datasheet Soft-Start Equation Error?

Hi,

Please see my calcultation:

Tss(ms)=8.2nF*0.765V*0.86/6uA=0.899ms. There is no problem.

Shawn

Hi, Shawn-

Thanks for your reply. Your calculation, which does indeed match the formula given in the datasheet, equates to:

(8.2E-9 F) * (0.765 V) * (0.86) / (6E-6 A) = 899E-6 ms, or 899E-9 seconds.

However, your reply indicates that the equation yields 899E-6 seconds. You seem to have inadvertently overlooked that the original equation is given in milliseconds, not seconds.

Am I completely missing the ball here?

Thanks,

-Erik

This is my first time contacting TI support staff, and I'm not very impressed. I guess this is why TI parts are cheaper than a similarly spec'd Linear / Analog. 

If you care to take a look at my reply from Monday the 26th (and in turn go back and look at your calculation carefully), I'll still consider using the part. Otherwise I'll find another vendor.

Regards,

-Erik

Hi Erik,

Sorry for the delay, please look at the equation carefully, the unit is "ms", not "s".

Shawn

Shawn-

Please forward this entire exchange to a colleague.

-Erik