Technical Product Specification for Canoe Pass - Preminary - Intel

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Intel ® Server System P4000CP Power System Options Intel ® Server Board S2600CP and Server System P4000CP TPS 13.3.5.2 Over Voltage Protection (OVP) The power supply over voltage protection is locally sensed. The power supply shuts down and latchs off after an over voltage condition occurs. This latch is cleared by toggling the PSON # signal or by an AC power interruption. The values are measured at the output of the power supply’s connectors. The voltage does not exceed the maximum levels when measured at the power connectors of the power supply connector during any single point of fail. The voltage doesn’t trip any lower than the minimum levels when measured at the power connector. 12VSBwill be auto-recovered after removing OVP limit. 126 Table 93. Over Voltage Protection (OVP) Limits Output voltage Min (v) Max (v) +12V 13.3 14.5 +12VSB 13.3 14.5 13.3.5.3 Over Temperature Protection (OTP) The power supply will be protected against over temperature conditions caused by loss of fan cooling or excessive ambient temperature. In an OTP condition the PSU will shutdown. When the power supply temperature drops to within specified limits, the power supply shall restore power automatically, while the 12VSB remains always on. The OTP circuit must have built in margin such that the power supply will not oscillate on and off due to temperature recovering condition. The OTP trip level shall have a minimum of 4C of ambient temperature margin. 13.3.6 Control and Indicator Functions The following sections define the input and output signals from the power supply. Signals that can be defined as low true use the following convention: Signal# = low true. 13.3.6.1 PSON# Input Signal The PSON # signal is required to remotely turn on/off the power supply. PSON # is an active low signal that turns on the +12V power rail. When this signal is not pulled low by the system, or left open, the outputs (except the +12VSB) turn off. This signal is pulled to a standby voltage by a pull-up resistor internal to the power supply. Refer to Table 42 for the timing diagram. Signal Type PSON# = Low PSON# = High or Open Table 94. PSON# Signal Characteristic Accepts an open collector/drain input from the system. Pull-up to VSB located in power supply. ON OFF MIN MAX Logic level low (power supply ON) 0V 1.0V Logic level high (power supply OFF) 2.0V 3.46V Source current, Vpson = low 4mA Power up delay: Tpson_on_delay 5msec 400msec PWOK delay: Tpson_pwok 50msec Intel Confidential Revision 0.8 Intel order number G26942-003
Intel ® Server Board S2600CP and Server System P4000CP TPS Intel ® Server System P4000CP Power System Options 0V 1.0 2.0 3.46V V V Figure 49. PSON# Required Signal Characteristic. 13.3.6.2 PWOK (Power OK) Output Signal PWOK is a power OK signal and will be pulled HIGH by the power supply to indicate that all the outputs are within the regulation limits of the power supply. When any output voltage falls below regulation limits or when AC power has been removed for a time sufficiently long so that power supply operation is no longer guaranteed, PWOK will be de-asserted to a LOW state. See Table 46 for a representation of the timing characteristics of PWOK. The start of the PWOK delay time shall inhibited as long as any power supply output is in current limit. Signal Type PWOK = High PWOK = Low Disabled Enabled 0.3V ≤ Hysterisis ≤ 1.0V In 1.0-2.0V input voltages range is required 1.0 V PS is enable d Table 95. PWOK Signal Characteristics Revision 0.8 Intel Confidential Intel order number G26942-003 Open collector/drain output from power supply. Pull-up to VSB located in the power supply. Power OK Power Not OK 2.0 V PS is disable d MIN MAX Logic level low voltage, Isink=400uA 0V 0.4V Logic level high voltage, Isource=200A 2.4V 3.46V Sink current, PWOK = low 400uA Source current, PWOK = high 2mA PWOK delay: Tpwok_on 100ms 1000ms PWOK rise and fall time 100sec Power down delay: Tpwok_off 1ms 200msec A recommended implementation of the Power Ok circuits is shown below. Note: the Power Ok circuits should be compatible with 5V pull up resistor (>10k) and 3.3V pull up resistor (>6.8k). 127
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Technical Product Specification for Canoe Pass - Preminary - Intel

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