RM23712 TPS
22
3.2.1.11 Power Recovery
The power supply shall recover automatically (auto recover) after an AC power failure. AC power
failure is defined to be any loss of AC power that exceeds the dropout criteria.
3.2.1.12 Voltage Brown Out
The power supply shall comply with the limits defined in EN55024:1998 using the IEC
61000-4-11:1995 test standard and performance criteria C defined in Annex B of CISPR 24.
In addition the power supply shall meet the following requirements:
A continuous input voltage below the nominal input range shall not damage the power supply or
cause overstress to any power supply component. The power supply must be able to return to
normal power up state after a brownout (Sag) condition. During brownout test from 120VAC to 0VAC
@ 800W with 3mins ramp, input current shall never exceed fuse and shall not blow the fuse.
3.2.1.13 AC Line Leakage Current
The maximum leakage current to ground for each power supply shall be 1.0 mA when tested at
264Vac/60Hz.
3.2.2 DC output voltages
3.2.2.1 Grounding
The output ground of the pins of the power supply provides the output power return path. The
ground output at the PCB card edge shall be connected to the safety ground (power supply
enclosure). This grounding should be well designed to ensure passing the max allowed Common
Mode Noise levels.
The power supply shall be provided with a reliable protective earth ground. All secondary circuits
shall be connected to protective earth ground. Resistance of the ground returns to chassis shall not
exceed 100 mΩ (Test Conditions 40A for 120sec). This path may be used to carry DC-current.
3.2.2.2 Output rating
The following table defines the power and current rating of the 800W power supply. The combined
output power of all outputs shall not exceed the rated output power. The power supply must meet
both static and dynamic voltage regulation requirements.
Table 20.Output Power and Current Ratings
3.2.2.3 Auxiliary Output (Standby)
The 12Vsb output shall be present when an AC input greater than Vrecover is applied.
3.2.2.4 No load operation
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