Ripple/Noise; Timing Requirements; Table 55. Ripples And Noise; Table 56. Timing Requirements - Penguin Computing Relion 1900e Technical Manual

supplies must be able to load share in parallel and operate in a hot-swap/redundant 1+1 configurations.
The 12VSBoutput is not required to actively share current between power supplies (passive sharing). The
12VSBoutput of the power supplies are connected together in the system so that a failure or hot swap of a
redundant power supply does not cause these outputs to go out of regulation in the system.

13.2.14 Ripple/Noise

The maximum allowed ripple/noise output of the power supply is defined in the following table. This is
measured over a bandwidth of 10Hz to 20MHz at the power supply output connectors. A 10µF tantalum
capacitor in parallel with a 0.1µF ceramic capacitor is placed at the point of measurement.

13.2.15 Timing Requirements

These are the timing requirements for the power supply operation. The output voltages must rise from 10%
to within regulation limits (T
outputs must rise monotonically. The following table shows the timing requirements for the power supply
being turned on and off from the AC input, with PSON held low and the PSON signal, with the AC input
applied.
Item
T Output voltage rise time
vout_rise
Tsb_on_delay Delay from AC being applied to 12VSBbeing
within regulation.
T ac_on_delay Delay from AC being applied to all output
voltages being within regulation.
Tvout_holdup Time 12Vl output voltage stay within regulation
after loss of AC.
Tpwok_holdu Delay from loss of AC to de-assertion of PWOK
p
Tpson_on_del Delay from PSON# active to output voltages
ay within regulation limits.
T pson_pwok Delay from PSON# deactivate to PWOK being
de-asserted.
Tpwok_on Delay from output voltages within regulation
limits to PWOK asserted at turn on.
T pwok_off Delay from PWOK de-asserted to output
voltages dropping out of regulation limits.
Tpwok_low Duration of PWOK being in the de-asserted state
during an off/on cycle using AC or the PSON
signal.
Tsb_vout Delay from 12VSBbeing in regulation to O/Ps
being in regulation at AC turn on.
T12VSB_holdu Time the 12VSBoutput voltage stays within
p regulation after loss of AC.
* The 12VSBoutput voltage rise time shall be from 1.0ms to 25ms
115
Relion 1900e/2900e Manual

Table 55. Ripples and Noise

+12V main
120mVp-p
) within 5 to 70ms. For 12VSB, it is allowed to rise from 1.0 to 25ms. All
vout_rise

Table 56. Timing Requirements

Description
+12VSB
120mVp-p
MIN
5.0 * 70 *
1500
3000
13
12
5 400
5
100 500
1
100
50 1000
70
MAX UNITS
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
Revision 1.3