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3.2 Over-current Warning for Switcher A on Pmic 0x14

Ultra96-V2 boards having a datecode of 1927 or earlier will exhibit this behavior.

The Infineon Pmics used on Ultra96-V2 are programmable devices that include voltage value,

warning, and fault settings. Reference Designator U12 is an Infineon IRPS5401 with an address

setting of 0x14. Switcher A on this device delivers 1.8V to the Ultra96-V2 which is VCC_PSAUX.

this can be seen on Sheet 16 of Ultra96-V2 Rev 1 schematics. This rail was designed to deliver a

maximum steady-state current of 1.0A.

For the affected boards, the warning threshold was set too low, such that occasional current spikes

will trigger an over-current warning. This is only seen if actively monitoring in the Infineon

PowIRCenter software, as shown in the figures below. The warning does NOT affect the proper

operation of the board.

Figure 3 – Ultra96-V2 Schematic Page for Pmic #2, 0x14

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