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TPS22965: rise time calculation

Kiran Kumar R
Intellectual 265 points
Part Number: TPS22965

Hi team,

we are using  TPS22965 in our design and we want Vout rise time more then 50msec(miliseconds). the configuarations are 

Vin = 5V

Vbias = 5V

Cin = 22uF

CL = 2.2uF

from the datasheet sec 9.3.1, Table 1 , CT value is given only upto 17700usec(17.7msec) .  my queries are:

1. using the formula SR= 0.38*CT+34, can i use CT value of 0.047uF (47000pF), so i get a rise time more than 50msecs.

2. what is the maximum CT value i can use on this device.

--

Thanks in Advance,

Kiran

  • 0
    TI__Genius 16035 points

    Hi Kiran, 

    There is no hard limit on CT. 

    The only limitation is that a longer turn on time could cause the device to heat up, however this is a low chance.

    We also do not specify any timing for CT values outside of the CT values specified in the datasheet. 

    Best Regards, 

    Elizabeth