Intel Server Board S1200BT - PROconsult Data A/S

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Design and Environmental Specifications Intel® Server Board S1200BT TPS Table 53. Turn On/Off Timing Item Description Minimum Maximum Units T sb _on_delay Delay from AC being applied to 5 VSB being Msec N/A 1500 within regulation. T ac _on_delay T vout _holdup T pwok _holdup T pson _on_delay T pson _pwok T pwok _on T pwok _off T pwok _low T sb _vout T 5VSB _holdup Delay from AC being applied to all output voltages being within regulation. Duration for which all output voltages stay within regulation after loss of AC. Measured at 80% of maximum load. Delay from loss of AC to de-assertion of PWOK. Measured at 80% of maximum load. Delay from PSON# active to output voltages within regulation limits. Delay from PSON# deactive to PWOK being deasserted. Delay from output voltages within regulation limits to PWOK asserted at turn on. Delay from PWOK de-asserted to output voltages (3.3 V, 5 V, 12 V, -12 V) dropping out of regulation limits. Duration of PWOK being in the de-asserted state during an off/on cycle using AC or the PSON signal. Delay from 5 VSB being in regulation to O/Ps being in regulation at AC turn on. Duration for which the 5 VSB output voltage stays within regulation after loss of AC. N/A 2500 21 N/A 20 N/A 5 400 N/A 50 100 500 1 N/A 100 N/A 50 1000 70 N/A Msec Msec Msec Msec Msec Msec Msec Msec Msec Msec Figure 50. Turn On/Off Timing (Power Supply Signals) 116 Intel order number G13326-003 Revision 1.0
Intel® Server Board S1200BT TPS Design and Environmental Specifications 10.3.11 Residual Voltage Immunity in Standby Mode The power supply is immune to any residual voltage placed on its outputs (typically, a leakage voltage through the system from standby output) up to 500 mV. There is no additional heat generated nor stressing of any internal components with this voltage applied to any individual output and all outputs simultaneously. It also does not trip the power supply protection circuits during turn on. The residual voltage at the power supply outputs for a no-load condition does not exceed 100 mV when AC voltage is applied and the PSON# signal is de-asserted. 10.3.12 Protection Circuits Protection circuits inside the power supply should cause only the power supply‘s main outputs to shut down. If the power supply latches off due to a protection circuit tripping, an AC cycle OFF for 15 seconds and a PSON # cycle HIGH for 1 second should reset the power supply. 10.3.12.1 Over-current Protection (OCP) The power supply has current limits to prevent the +3.3 V, +5 V, and +12 V outputs from exceeding the values shown in the following table. If the current limits are exceeded, the power supply shuts down and latches off. The latch is cleared by toggling the PSON # signal or using an AC power interruption. The power supply is not damaged from repeated power cycling in this condition. -12 V and 5 VSB are protected under over-current or shorted conditions so no damage can occur to the power supply. Auto-recovery feature is a requirement on 5 VSB rail. Table 54. Over-Current Protection (OCP) VOLTAGE OVER CURRENT LIMIT Min Max +3.3V 15A 21A +5V 20A 27A +12V 30A 40A -12V 0.625A 2A 5VSB N/A 4A 10.3.12.2 Over-Voltage Protection (OVP) The power supply over-voltage protection is locally sensed. The power supply shuts down and latches off after an over-voltage condition occurs. You can clear this latch by toggling the PSON # signal or using an AC power interruption. The following table contains the over-voltage limits. The values are measured at the output of the power supply‘s connectors. The voltage never exceeds the maximum levels when measured at the power pins of the power supply connector during any single point of fail. The voltage never trips any lower than the minimum levels when measured at the power pins of the power supply connector. Exception: +5 VSB rail should be able to recover after an over-voltage condition occurs. Table 55. Over-voltage Protection (OVP) Limits Output Voltage Minimum (V) Maximum (V) +3.3 V 3.9 4.5 +5 V 5.7 6.2 +12 V 13.3 14.5 Revision 1.0 Intel order number G13326-003 117
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