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Original question:

TPS2546: STATUS pin behavior

TPS2546: STATUS behavior

Antony Lin
Genius 13480 points
Part Number: TPS2546

Hi,

I have some STATUS pin related questions when I test our EVM with input from DC power supply and output connected to a current load.

When CTL1/CTL2/CTL3/ILIM_SEL= “0111”

    1. If the current load is below ILD as below, STATUS would stay high, is it expected behavior?
    2. If the current load is above ILD, STATUS become low after the current load is enabled.  But, 2 seconds later Vout becomes low for 2 seconds and back to high level.  Is it normal?  Why we have such behavior at Vout?  ( I don't see such Vout behavior when CTL1/CTL2/CTL3/ILIM_SEL= “1111”, why?)
    3. STATUS become high around 3 seconds after current is removed from the board, is it normal?  Is 3sec the "Load detect reset time" in the table as below?
    4. When a current load higher than ilim_hi is connected, Vout will become low, but try to be enabled again shortly each 2.2 seconds.  Why it's 2.2 seconds?  Do we define it in datasheet?  I found this period is around 400ms when CTL1/CTL2/CTL3/ILIM_SEL= “1111”, why the timing is different?

Thanks

Antony