How does the PCA9450 behave after its output is shorted?

tomo · ‎08-20-2023

Hi all,

How does the PCA9450 behave after the output is shorted?
I'm assuming that after a short occurs, all outputs are stopped once, but after that, does the PCA9450 try to restart the outputs like in HICCUP mode? Or does it keep stopping output?

Best regards,

tomo

TomasVaverka · ‎08-21-2023

Hi Miyazaki-san,

If the PMIC is in RUN/STBY mode, this behavior of all outputs are stopped once happens at the VRFLTx is unmasked, and after tFLT_POK_MSK, the regulators are trying to restart like HICCUP. But if masked, only the fault regulator stopped. Once short event removed, the output is normal, but there will be an interrupt and a fault status register assert.

BR, Tomas

View solution in original post

TomasVaverka · ‎08-21-2023

Hi Miyazaki-san,

If the PMIC is in RUN/STBY mode, this behavior of all outputs are stopped once happens at the VRFLTx is unmasked, and after tFLT_POK_MSK, the regulators are trying to restart like HICCUP. But if masked, only the fault regulator stopped. Once short event removed, the output is normal, but there will be an interrupt and a fault status register assert.

BR, Tomas

tomo · ‎08-21-2023

Thank you for your reply.

I understand the content of your reply.
thank you very much.

Best regards,
tomo