SilverStone GEMINI Series User manual

Gemini 900A Gold
Gemini Series
Cybenetics Gold 900W ATX Redundant Power Supply
▓ 900W+900W 24hour and well working performance at 50°C fully continuous power output
▓ ATX form factor
▓ Cybenetics Gold Certification
▓ 1+1 ATX redundant configuration
▓All Japanese electrolytic capacitors
▓
Hot swappable design
▓ Convenient pull-out handle bars

Gemini 900A Gold
Gemini Series
SST-GM900A-GF / SST-GM900A-GFU
1+1 ATX Redundant Switching Power Supply
Cybenetics Gold efficiency certified.
900W+900W
The PS/2 redundant is a power sub-system made up of a cage and redundant, hot
swappable power supply modules. The cage is intended to be mounted in the
system and not redundant or hot swappable. The exterior face of the cage accepts
hot swappable power supply modules. The distribution board within the cage
distributes output power from the modules to a wire harness. Cooling fans, EMI
filtering, and IEC inlet connector(s) may be located in the modules.
The power supply modules shall incorporate universal power input with active
power factor correction, which shall reduce line harmonics in accordance with the
EN61000-3-2 and JEIDA MITI standards.
The AC input connector shall be an IEC 320 C-14 power inlet. This inlet is
rated for 10A/250 VAC.
The power supply must operate within all specified limits over the following
input voltage range.
1.GENERAL DESCRIPTION AND SCOPE
2.AC Input Requirements
2.1 AC Inlet Connector
2.2 AC Input Voltage Specification

Table1: AC Input Rating
2.3 Power Factor
The power factor shall be greater than 0.95 at full load / 100 Vrms input
voltage conditions, and 0.9 at full load / 240Vrms input voltage conditions
2.4 Input Under Voltage
Brown-out( AC UVP)
The power supply shall power off if the AC input is below VAC low_limit and
shall start (auto recover) if VAC recover is reached. Input of VAC below VAC
recover shall not cause any damage to the power supply, including the input
fuse.
2.5 Hold-up Time
The power supply holdup time requirements to 80% of maximum load.
2.6 Efficiency
Efficiency shall be tested at AC input voltages of 115VAC and 230VAC. And
only insert one power module into the power cage. The voltage should measure
on the back plane. It could be support 80 Plus Gold efficiency
2.7 AC Line Dropout
An AC line dropout is defined to be when the AC input drops to 0 VAC at any
phase of the AC line for any length of time. During an AC dropout of one cycle
or less the power supply must meet dynamic voltage regulation requirements
up to 75% of the rated output load. An AC line dropout of one cycle or less shall
not cause any tripping of control signals or protection circuits. If the AC dropout
lasts longer than one cycle or the load is greater than 75%, the power supply
should recover and meet all turn on requirements. The power supply must meet
the AC dropout requirement over rated AC voltages, frequencies, and output
loading conditions. Any dropout of the AC line shall not cause damage to the
power supply. In the case of redundant AC inputs, the AC line dropout may
occur on either or both AC inlet.
ıij
PARAMETER MIN RATED MAX
Voltage (110) 90 100-127 Vrms 140 Vrms
Voltage (220) 180 200-240 Vrms 264 Vrms
Frequency 47 Hz -- 63 Hz
VAC recover (Brown in) VAC low_limit (Brown out)
82VAC ±4VAC 75VAC ±5VAC

ıĴ
2.8 AC Line Fuse
2.9 AC Inrush
The power supply shall incorporate one input fuse on the LINE side for input
over-current protection to prevent damage to the power supply and meet
product safety requirements. Fuses should be slow blow type or equivalent to
prevent nuisance trips. AC inrush current shall not cause the AC line fuse to
blow under any conditions. All protection circuits in the power supply shall not
cause the AC fuse to blow unless a component in the power supply has failed.
This includes DC output load short conditions.
An additional inrush current limit is recommended for some system applications
that require multiple systems on a single AC circuit. Under all other conditions,
power supply should not be damaged.
(Cold start – 25 deg. C)
2.10 AC Line Transient Specification
Table 2: AC Line Sag Transient Performance
AC line transient conditions shall be defined as “sag” and “surge”
conditions. Sag conditions (also referred to as “brownout” conditions) will be
defined as the AC line voltage dropping below nominal voltage. Surge conditions
will be defined as the AC line voltage rising above nominal voltage.
The power supply shall meet the requirements under the following AC line sag
and surge conditions.
AC Line Sag
Duration Sag Operating AC Voltage Line Frequency Performance
Criteria
Continuous 10% Nominal AC Voltage
ranges
50/60 Hz No loss of
function or
performance
0 to 1 AC cycle 70% Nominal AC Voltage
ranges
50/60 Hz No loss of
function or
performance
>1 AC cycle >10% Nominal AC Voltage
ranges
50/60 Hz Loss of function
acceptable, self-
recoverable
115V 40A
230V 80A

3.1 Output Power/Currents
3.2 Voltage Regulation
The following tables define the power and current ratings for different
recommended power levels.
The power assembly output voltages must stay within the following voltage
limits when operating at steady state and dynamic loading conditions.
These limits include the peak-peak ripple/noise specified in Section 5.10.
All outputs are measured with reference to the return remote sense (ReturnS)
signal. The 5 V, 12V, –12 V, and 5 VSB outputs are measured at the power
assembly connectors referenced to ReturnS. The +3.3 V is measured at its
remote sense signal (3.3VS) located at the signal connector.
Table 3: AC Line Surge Transient Performance
AC Line Surge
Duration Surge Operating AC Voltage Line Frequency Performance
Criteria
Continuous 10% Nominal AC Voltages 50/60 Hz No loss of function
or performance
0 to ½ AC cycle 30% Mid-point of nominal
AC Voltages
50/60 Hz No loss of function
or performance
3.DC Output Specification
ıĵ
3.1.1 Standby Outputs
Table 4: 900 W Load Ratings
The 5 VSB output shall be present when an AC input greater than the
power supply turn on voltage is applied.
1. Maximum continuous total DC output power should not exceed 900 W.
2. Maximum continuous combined load on +3.3 VDC and +5 VDC outputs
shall not exceed 130 W
Voltage Minimum
Continuous
Maximum
Continuous
+3.3 V 0 A 20.0 A
+5 V 0 A 20.0 A
+12V 1A 75 A
-12 V 0 A 0.5A
+5 VSB 0 A 3 A

3.3 Dynamic Loading
Table 6: Voltage Regulation Limits
Table 9: Transient Load Requirements
Table 10: Capacitive Loading Conditions
The output voltages shall remain within the limits specified in Table 9 for the
step loading and within the limits specified in for the capacitive loading.
The load transient repetition rate shall be tested between 50 Hz and 5kHz at
duty cycles ranging from 10%-90%. The load transient repetition rate is only
a test specification. The step load may occur anywhere within the MIN load to
the MAX load shown in Table 7 and Table 8.
3.4 Capacitive Loading
The power supply shall be stable and meet all requirements, except dynamic
loading requirements, with the following capacitive loading ranges.
Note: Up to 10,000 μF of the +12V capacitive loading may be on the +12V output.
ıĶ
Parameter MIN NOM MAX Units Tolerance
+3.3 V +3.135 +3.30 +3.46 Vrms +5/-5%
+5 V +4.75 +5.00 +5.25 Vrms +5/-5%
+12V +11.40 +12.00 +12.60
Vrms +5/-5%
-12 V -10.80 -12.00 -13.20 Vrms +10/-10%
+5 VSB +4.75 +5.00 +5.25 Vrms +5/-5%
Output . Step Load Size Load Slew Rate Capacitive Load
+3.3 V 20% of max load 0.5 A/μs 1000 μF
+5 V 20% of max load 0.5 A/μs 1000 μF
+12V 30% of max load 0.5 A/μs 6600 μF
+5 VSB 25% of max load 0.5 A/μs 1 μF
Output MIN MAX Units
+3.3 V 10 12,000 μF
+5 V 10 12,000 μF
+12 V 10 33,000 μF
-12 V 1 350 μF
+5 VSB 1 350 μF

ıķ
3.5 Ripple and Noise
3.6 Load sharing
Table 11: Ripple and Noise
3.7 Hot Swap Requirements
The +12 V output shall have active load sharing. When operating at 50%
of full load, the output current of any 1+1 power supplies shall be within
(+/-10%). For example, if power supply #1 is operating at 20A, then all other
power supplies within the system shall be operating between 18A to 22A
(+/- 10% of 20A)
The power supply modules shall be hot swappable. Hot swapping a power
supply is the process of inserting and extracting a power supply from an
operating power system. During this process the output voltages shall
remain within the limits specified in Table 6 with the capacitive load specified.
The hot swap test must be conducted when the sub-system is operating
under both static and dynamic conditions. The sub-system shall not exceed
the maximum inrush current as specified in Table 7 and Table 8. The power
supply can be hot swapped by the following methods:
AC connecting separately to each module. Up to two power supplies may be
on a single AC power source. Extraction: The AC power will be disconnected
from the power supply first and then the power supply is extracted from the
sub-system. This could occur in standby mode or powered on mode. Insertion:
The module is inserted into the cage and then AC power will be connected to
the power supply module.
For power modules with AC docking at the same time as DC. Extraction:
The module is extracted from the cage and both AC and DC disconnect at the
same time. This could occur in standby or power on mode. No damage or
arcing shall occur to the DC or AC contacts which could cause damage.
Insertion: The AC and DC connect at the same time as the module is inserted
into the cage. No damage to the connector contacts shall occur. The module
may power on or come up into standby mode.
Many variations of the above are possible. Supplies need to be compatible with
these different variations depending upon the sub-system construction.
In general, a failed (off by internal latch or external control) supply may be
removed, then replaced with a good power supply, however, hot swap needs
to work with operational as well as failed power supplies. The newly inserted
power supply may get turned on by inserting the supply into the system or by
system management recognizing an inserted supply and explicitly turning it on.
+3.3 V +5 V +12 V -12 V +5 VSB
50 mVp-p 50 mVp-p 120 mVp-p 200 mVp-p 50 mVp-p

These are the timing requirements for the power supply operation.
The output voltages must rise from 10% to within regulation limits
(Tvout_rise) within 1 to 70ms. The +3.3V, +5V and +12V output voltages
should start to rise approximately at the same time. All outputs must rise
monotonically. Each output voltage shall reach regulation within 50ms
(Tvout_on) of each other during turn on of the power supply. Each output+
voltage shall fall out of regulation within 400msec (Tvout_off) of each other
during turn off. Refer to Figure 1 Power Supply Timing. Figure 2
Turn-on Turn-off Timing shows the timing requirements for the power supply
being turned on and off via the AC input with PSON held low, and the
power supply being turned on and off with the PSON signal after AC input
is applied.
3.8 Timing Requirements
ıĸ
Table: 12 Output Voltage Timing
Figure 1: Power Supply Timing
ITEM DESCRIPTION MIN MAX UNITS
Tvout_rise Output voltage rise time from each main
output.
1 70 msec
Tvout_on All main outputs must be within
regulation of each other within this time.
50 msec
T vout_off All main outputs must leave regulation
within this time.
400 msec
Vo
10% Vout
Tvout rise
Tvout
_
on
Tvout_off
V1
V2
V3
V4

ıĹ
Table 13: Turn On/Turn Off Timing
AC Input Figure 3: Timing Diagram
ITEM DESCRIPTION MIN MAX UNIS
Tsb_on_delay Delay from AC being applied to 5VSB
being within regulation.
3000 msec
T ac_on_delay Delay from AC being applied to all
output voltages being within regulation.
4500 msec
Tvout_holdup Time all output voltages stay within
regulation after loss of AC.
17 msec
Tpwok_holdup Delay from loss of AC to deassertion of
PWOK.
16 msec
Tpson_on_delay Delay from PSON#active to output
voltages within regulation limits.
5 400 msec
T pson_pwok Delay from PSON#deactive to PWOK
being deasserted.
100 msec
Tpwok_on Delay from output voltages within
regulation limits to PWOK asserted at
turn on.
100 500 msec
T pwok_off Delay from PWOK deasserted to output
voltages (3.3V, 5V, 12V) dropping out of
regulation limits.
1 msec
Tpwok_low Duration of PWOK being in the
deasserted state during an off/on cycle
using AC or the PSON signal.
100 msec
Tsb_vout Delay from 5VSB being in regulation to
O/Ps being in regulation at AC turn on.
50 1000 msec
Vout
PWOK
5VSB
PSON
Tsb on dela
y
TAC_on_delay Tpwok_on
Tvout_holdup
Tpwok_holdup
Tpson on delay
Tsb on dela
y
Tpwok_on
Tpwok_off
Tpwok_off
Tpson_pwok
Tpwok
Tsb_vout
AC turn on/off PSON turn
on/off cycle

Protection circuits inside the power supply shall cause only the power supply’s
main outputs to shutdown. If the power supply latches off due to a protection
circuit tripping, an AC cycle OFF for 15 s and a PSON# cycle HIGH for 1 s must
be able to reset the power supply.
4. Protection Circuits
4.1 Over Current Protection and Short Circuit Protection
4.2 Over Voltage Protection
Table 15: Over Current/Short Circuit Protection
The Over Current Condition shall be measured internal to the power supply
on all outputs (Main and Auxiliary OutputAR), and preventing outputs to
exceed current limits specified in below table. The power supply shall
shutdown and latch off after an Over Current condition on main outputs,
the auxiliary output shall be auto recover (VsBAR) after the OCP/SCP had
been removed.
The latch on the main output can be cleared by asserting PSON# signal or
by an Input Power interruption. The power supply shall alert the system of
the OCP/SCP condition via SMB Alert# and fail LED indicator.
The power supply shall not be damaged from repeated power cycling in
this condition.
The power supply over voltage protection shall be locally sensed in the hot
swap modules. The power supply shall shutdown and latch off after an over
voltage condition occurs. This latch shall be cleared by toggling the PSON#
signal or by an AC power interruption. Table 16 contains the over voltage
limits. The values are measured at the output of the power supply’s connectors.
The voltage shall never exceed the maximum levels when measured at the
power pins of the power supply connector during any single point of fail. The
voltage shall never trip any lower than the minimum levels when measured
at the power pins of the power supply connector.
ıĺ
Voltage Over Current Limit (Iout limit)
+3.3 V 24A---32A
+5 V 24A---32A
+12 V 83A---95A