TPS1653: Regarding ILIM Resistor

Hi Amrit,

I mistakenly installed a 0-ohm resistor instead of a 9k-ohm one.

The device powered on, and the current rose till 400-500mA before it shut down.

Thanks,

Manikanta

Till 500mA, I haven't seen any shutdown activity on the eFUSE.
>500mA, there is a shutdown happened.

Thanks,

Manikanta

Hello Manikanta,

Can you share schematic?

Is there any resistance adding to ILIM? Can you check directly from ILIM pin to GND.

Is there cap connected at output? What's the inrush current?

Thanks

Amrit 

Hi Amrit,

I have attached the screenshot of the schematics.

Please have a look at it.

Thanks,

Manikanta

Hello Manikanta,

RILIM is 3.3K connected.

When you connect 0E and try powering ON the circuit, is it turning ON?

Below quoted sentence is from datasheet. Do you see this behaviour?

"The TPS16530 device feature ILIM pin short and open fault detection and protection. The internal FET is turned OFF when ILIM pin is detected short or open to GND and it remains OFF till the ILIM pin fault is removed."

Thanks 

Amrit 

Hi Amrit,

The ILIM resistor is 30K, not 3.3K.

I have connected a 0E here by accidentally, but the eFUSE is powering on. This is strange behaviour.

if possible, can you please try this from your end, and update.

Thanks,

Manikanta

Hello Mani,

Sure. I will check and update by end of this week.

Thanks 

Amrit