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Intel OCPRF100 MP User Manual

Page 68

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OCPRF100 MP Server System Technical Product Specification

Revision 1.0

61

5.5.4.4

Over-voltage Protection

The power supply over-voltage

protection is sensed locally. The power supply will shut down in a

latch off mode after an over-voltage condition. The latch is cleared by toggling the power supply
on signal, or by an AC power interruption

of greater than 1 second but less than 10 seconds to

reset from the latch off condition.

This limit applies over all specified AC input voltages and output

loading conditions. Table 5-6: Over-voltage Protection contains the over-voltage limits. The val-
ues are measured at the output of the power supply connector.

5.5.4.5

Over-current Protection

The power supply has current limits to prevent the +3.3 Vdc, +5 Vdc, and +12 Vdc outputs from
exceeding the values shown in Table 5-7: Over-current Protection. The current limiting is of the
voltage fold-back type. The over-current limit level is maintained for a period of 1.6 seconds min-
imum and 2.0 seconds maximum. After this time, the power supply latches off. The latch will be
cleared as described in Section Over-voltage Protection. The power supply will not be damaged
from repeated power cycling in this condition.

5.5.4.6

Short Circuit Protection

The power supply will not be damaged by application of a short circuit to any DC output. Short
circuits will not turn into the over-current protection process described in Section Over-current

Table 5-6: Over-voltage Protection

Output Voltage

Protection Point [ V]

+3.3 V

3.8 – 4.3

+5 V

6.0 – 6.5

+12 V

13 – 14

Table 5-7: Over-current Protection

Voltage Over

Current

Limit

+3.3 V

39.6 A minimum; 46.8 A maximum

+5 V

39.6 A minimum; 46.8 A maximum

+12 V

46 A minimum; 51 A maximum