Intel SR1695GPRX1AC Manual Do Utilizador
Intel® Server System SR1695GPRX TPS
Power Sub-System
Revision 1.5
25
Intel order number: G11332-006
Table 32. Over Current Protection
Voltage
Over current limit (iout limit)
+12V
110% minimum; 150% maximum
+5VSB
3.6A minimum, 8A maximum
3.5.2 Over
Voltage Protection (OVP)
The power supply over voltage protection shall be locally sensed. The power supply shall
shutdown in a latch off mode after an over voltage condition. This latch can be cleared by
toggling the PSON
shutdown in a latch off mode after an over voltage condition. This latch can be cleared by
toggling the PSON
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signal or by an AC power interruption. Table 3.11 contains the minimum
and maximum output voltage levels for this condition. The values are measured at the output of
the power supply’s DC connector.
the power supply’s DC connector.
3.5.3
Over Thermal protection
The power supply shall be protected against over temperature conditions caused by loss of
forced air-cooling or excessive ambient temperature. In an over-temperature condition the PS
will shutdown. The Standby output may also shutdown or remain powered on. When the power
supply temperature drops to within specified limits, the power supply shall restore power
automatically. The OTP circuit shall have built in hysteresis such that the power supply will not
oscillate on and off due to temperature recovering condition. The power supply shall alert the
system of the OTP condition via the power supply DCOK signal changing to false state and the
green LED changing to an unlighted condition.
forced air-cooling or excessive ambient temperature. In an over-temperature condition the PS
will shutdown. The Standby output may also shutdown or remain powered on. When the power
supply temperature drops to within specified limits, the power supply shall restore power
automatically. The OTP circuit shall have built in hysteresis such that the power supply will not
oscillate on and off due to temperature recovering condition. The power supply shall alert the
system of the OTP condition via the power supply DCOK signal changing to false state and the
green LED changing to an unlighted condition.
3.5.4
Closed Loop Stability
The power supply shall be unconditionally stable under all line/load/transient load conditions
including
including
capacitive load ranges. A minimum of: 45 degrees phase margin and -10dB-gain
margin is required. The power supply manufacturer shall provide proof of the unit’s closed-loop
stability with local sensing through the submission of Bode plots. Closed-loop stability must be
ensured at the maximum and minimum loads as applicable.
stability with local sensing through the submission of Bode plots. Closed-loop stability must be
ensured at the maximum and minimum loads as applicable.
3.5.5
Common Mode Noise
The Common Mode noise on the output shall not exceed 350mVpk-pk over the frequency band
of 10Hz to 30MHz.
1. The measurement shall be made across a 100Ω resistor between each of DC outputs,
including ground at the DC power connector and chassis ground (power subsystem enclosure).
2. The test set-up shall use a FET probe such as Tektronix model P6046 or equivalent.
of 10Hz to 30MHz.
1. The measurement shall be made across a 100Ω resistor between each of DC outputs,
including ground at the DC power connector and chassis ground (power subsystem enclosure).
2. The test set-up shall use a FET probe such as Tektronix model P6046 or equivalent.
3.5.6
Zero Load Stability Requirements
When the power subsystem operates in a no load condition on all outputs including 5VSB in a
1+0 or 1+1 configuration, it does not need to meet the output regulation specification, but it must
operate without any tripping of over-voltage or other fault circuitry. When the power subsystem
is subsequently loaded, it must begin to regulate and source current without fault.
1+0 or 1+1 configuration, it does not need to meet the output regulation specification, but it must
operate without any tripping of over-voltage or other fault circuitry. When the power subsystem
is subsequently loaded, it must begin to regulate and source current without fault.