This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

TPS61158: Turn on / off delay time for TPS61158

Part Number: TPS61158

Hi all,

Our customer wants to know turn on/off delay time for TPS6118.

Could you pls help to this?

It is difficult to find this in the datasheet.

1. Start up time?

2. FB ramp time?

3. shutdown delay time?


  • Hi,

    The FB voltage is ramped in 32 steps of 341us per step, so the total ramp time is approximately 10.9ms.
    The ramp of the LED current will depend on the LED current as well as the input and output voltage. There is a 360mA input current limit during startup, so the ramp time will depend on the power requirements.
    Does "shutdown delay time" imply ramp down of the LED current or the delay between the control pin going low and the start of LED ramp down? The LED current will start turning off 3.5ms after the control pin has gone low. There is no ramping down of the LED current during turn off, this time will depend on the operating conditions.

    Angelos Tsiros