TPS566238: About the start time of TPS566238

chunli Liang

Part Number: TPS566238

Tool/software:

I am reviewing the datasheet of the TPS566238, and I have three questions about the POWER START UP time.

Question 1

In Section「6.3.2 Soft Start」,

it states that "If the application needs a longer soft-start time than 0.5 ms, the time can be set by connecting a capacitor on

the SS pin" indicate that the calculation method for Tss is 0.5ms plus the value calculated by Equation 2?

Question 2

Is there a minimum capacity requirement for Css when I want to calculate the minimum time of Tss?

Question 3

I have not found any description of the Enable delay time, except in 「Figure 7-15. Start-Up Through EN」.

It shows approximately 0.2ms. Is it a typical value?

Thanks and Best Regards

Chunli Liang

0 Hitesh Chandwani 18 hours ago

Hello Chunli,

WE will check and get back to you.

-Hitesh

0 Hitesh Chandwani 8 hours ago in reply to Hitesh Chandwani

Hello Chunli,

1. You are correct that Css will introduce a softstart time additional to 0.5ms

2. There is no minimum value of the Css, you can left it floating as it will charge the minimum internal capacitor (which adds 0.5mS).

3. Unfortunately, we don't have data for this parameter but its not a typical 0.2mS, its 0.2ms on for the specific testing condition.

-Hitesh

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