Intel S2600CP Technical Product Specification - Page 167

Intel® Server Board S2600CP and Server System P4000CP TPS Intel® Server System P4000CP Power System Options 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. Table 107. Over Voltage Protection (OVP) Limits Output voltage +12V +12VSB Min (v) 13.3 13.3 Max (v) 14.5 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 4C 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. Table 108. PSON# Signal Characteristic Signal Type PSON# = Low PSON# = High or Open Logic level low (power supply ON) Logic level high (power supply OFF) Source current, Vpson = low Power up delay: Tpson_on_delay PWOK delay: Tpson_pwok Accepts an open collector/drain input from the system. Pull-up to VSB located in power supply. ON OFF MIN MAX 0V 1.0V 2.0V 3.46V 4mA 5msec 400msec 50msec Revision 1.2 151 Intel order number G26942-003