TPS560430: Short-circuit protection

Hi Taku

The 135ms stop time is the time when the device does not switch, As seen below.

For the second question, Do you mean why it didn't operate at Dmax and generate an output voltage=Vin ? Can you please share the schematic? And what is the load during the operation?

Thank you.

Hi Gui,
Let me supplement the question of taku.

Q1, I understand SW-OFF time in hiccup-mode is 135ms.
Please tell me one more, is SW-ON time in hiccup mode specified?

Q2, You are right. I will ask customer for the schematic.

Do you have any possible factors at this information?

Best regards,

Hi Shuhei

The 'SW-ON time' is specfied in datasheet 8.3.6, after the current trggers ILS_LIMIT for 256 consecutive cycles.

There are 2 condition for hiccup mode to happen: 1) VFB<40%VREF, 2) current trigger I_LIMIT for 256 cycles;

Currently I got no idea why 24V Vin result in 9V Vout when RFBT is open.

Thank you