Rainbow-electronics MAX5958 Bedienungsanleitung PDF herunterladen (Seite 19)

MAX5957/MAX5958

Triple PCI Express, Hot-Plug Controllers

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ENABLE CHARGE ON

INTERNAL AUXILIARY

MOSFET DRIVING 3.3AUXO_.

START COUNTING t

FAULT ON 12V

OR 3.3V OUTPUTS

RESET t

FAULT

COUNTER

FAULT

STILL PRESENT?

SHUT DOWN

12V AND 3.3V OUTPUTS.

ASSERT FAULT_

STAY WAITING FOR

RESTART

FAULT

ELAPSED?

3.3VAUXIN IS OK,

AUXON_ IS HIGH,

PRES_DET IS LOW

RESET FAULT_

START COUNTING

FAULT

ARE ALL

MAIN OUTPUTS OK?

NO FAULT

DETECTED

LATCH-OFF

OPTION?

ON_ TOGGLED

HIGH ≥ LOW ≥ HIGH

MAIN INPUTS ARE

OK, ON_ IS HIGH

ENABLE CHARGE

ON 3.3G_ AND 12G_.

START

COUNTING t

ELAPSED?

START PGOOD

THRESHOLD

MONITORING

START COUNTING

FAULT

ALL PGOOD

THRESHOLDS

REACHED?

ASSERT PWRGD_

AFTER t

POR_HL

DELAY

RESET PWRGD_

POWER ON

AUXILIARY OUTPUT.

FAULT_ AND PWRGD_ ARE

HIGH IMPEDANCE

SHUT DOWN ALL OUTPUTS.

ASSERT FAULT_.

STAY WAITING

FOR t

RESTART

RESET FAULT_

ON_ AND

AUXON_ TOGGLED

HIGH ≥ LOW

≥ HIGH

ELAPSED?

AUX OUTPUT OK?

NO FAULT DETECTED

FAULT ON 3.3AUXO_?

FAULT

ELAPSED?

FAULT

STILL PRESENT?

LATCH-OFF

OPTION?

RESET t

FAULT

COUNTER

Figure 6. Fault Management Flowchart

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 25

MAX5957/MAX5958 1

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