SilverStone ST55GF User Manual

ST55GF

550W + 550W PS/2 redundant power supply

Hot swappable

Industry-leading reliability

Durable zinc-plated surface

Convenient pull-out handle bars

SPECIFICATION

SilverStone Gemini ST55GF

Mini Redundant Power Supply

With Active PFC

550W + 550W

1. General

This specification describes the electrical characteristics, functional and physical of a
550W+550W=550 watts redundant power supply with Active PFC (Power Factor
Correction) and hot-swappable capabilities.

2. AC Input Characteristics

2.1 AC Input Voltage and Frequency (Rating: 100V-240Vac, 47-63Hz, 10-5A)

The power supply must operate within all specified limits over the input voltage range in
Table 1.
Harmonics distortion of up to 10% THD must not cause the power supply to go out of
specified limits.

Parameter Rated Minimum Maximum

132 Vac 8 AVoltage (115V) 90 Vac 100-120Vac

Voltage (230V) 180 Vac 200-240Vac

Frequency 47 Hz 50 / 60 Hz 63 Hz

2.2 AC Inrush Current

AC line inrush current shall not damage any component nor cause the AC line fuse to blow
under any DC conditions and with any specified AC line input voltage and frequency.
Repetitive On/Off cycling of the AC input voltage shall not damage the power supply.

264Vac 4 A

Table 1 - AC Input Voltage and Frequency

Max.

Input Current

01

2.3 Input Power Factor Correction (Active PFC)

ST55GF

The power factor at full load shall be ••0.95 at nominal input voltage.

0.98

2.4 Input Current Harmonics

When the power supply is operated in 90-264Vac of Sec. 2.1, the input harmonic current
drawn on the power line shall not exceed the limits set by EN61000-3-2 class "D" standards.
The power supply shall incorporate universal power input with active power factor
correction.

2.5 AC Line Dropout

An AC line dropout of 17mS or less shall not cause any tripping of control signals or
protection circuits. If the AC dropout lasts longer than 17mS the power supply should
recover and meet all turn on requirements. The power supply shall meet the regulation
requirement ove r all rated AC voltages, frequencies, and output loading conditions. Any
dropout of the AC line shall not cause damage to the power supply. An AC line dropout is
defined as a drop in AC line to 0VAC at any phase of the AC line for any length of time.

2.6 AC Surge Voltages

The power supply shall be tested and be compliant with the requirements of IEC61000-4-5
Level 3 criteria for surge withstand capability, with the following conditions and exceptions.
The test equipment and calibrated waveforms shall comply with the requirements of
IEC61000-4-5 for open circuit voltage and short circuit current.

X

These input transients must not cause any out of regulation conditions, such as
overshoot and undershoot, nor must it cause any nuisance trips of the power supply
protection circuits.

X

The surge-withstand test must not produce damage to the power supply.

X

The power supply must meet surge-withstand test condition under maximum and
minimum DC output load conditions.

2.7 Surge Immunity, IEC61000-4-5

The peak value of the unidirectional surge waveform shall be 2KV for common mode and
1KV for differential mode of transient surge injection. No unsafe operation or no user
noticeable degradation is allowed under any condition. Automatic or manual recovery is
allowed for other conditions.

2.8 Electrical Fast Transient / Burst, IEC61000-4-4

No unsafe operation allowed under any condition. No user noticeable performance
degradation up to 1KV is allowed.Automatic or manual recovery is allowed for other
conditions.

02

2.9 Electrical Discharge, IEC61000-4-2

In addition to IEC61000-4-2, the following ESD tests should be conducted. Each surface
area of the unit under test should be subjected to twenty (20) successive static discharges, at
each of the follow voltages: 2KV, 3KV, 4KV, 5KV, 6KV and 8KV.

All power supply outputs shall continue to operate within the parameters of this
specification, without glitches or interruption, while the power is operating as defined and
subjected to 2kV through 10kV ESD pulses. The direct ESD event shall not cause any out of
regulation conditions such as overshoot or undershoot. The power supply shall withstand
these shocks without nuisance trips of the Over-Voltage Protection, Over-Current Protection,
or the remote +5VDC, +12VDC shutdown circuitry.

2.10Radiated Immunity, IEC61000-4-3

Frequency Electric Field Strength

27 MHz to 500 MHz un-modulated 3 V/m

3. DC Output Specification

3.1 Output Current / Loading

The following tables define two power and current rating. The power supply shall
meet both static and dynamic voltage regulation requirements for minimum load
condition.

03

+5V +5VSB+12V -12V+3.3VOutput Voltage
30A 24AMax. Load

Min. Load 0.1A0A2A1A

1A

Table 5 - Load Range 1

Note 1: The +5 & +3.3 Volt total output shall not exceed 180 W.
Note 2: The +5, +3.3 & +12Volt total output shall not exceed 526W.
Note 3: Maximum continues total DC output power shout not exceed 550W.

2A1A41A

ST55GF

3.2 DC Voltage Regulation, Ripple and Noise

The power supply output voltages must stay within the following voltage limits when
operating at steady state and dynamic loading conditions. All outputs are measured with
reference to the return remote sense (ReturnS) signal. The +5V,+12V, -12V and +5BSB
outputs are measure at the power supply connectors references to ReturnS. The +5V and
+3.3V is measured at its remote sense signal (+5VS+, +3.3VS+) located at the signal
connector.

+5V +5VSB+12V -12V+3.3VOutput Voltage

+5%/-5% +5%/-5% +5%/-5% +5%/-5% +10%/-10% Load Reg.

Line Reg.

±

1%

±

1%

±

1%

±

1%

±

1%

Ripple & Noise 50mV 50mV 50mV120mV 120mV

Table 7 - Regulation, ripple and noise

Ripple and noise shall be measured using the following methods:
a) Measurements made differentially to eliminate common-mode noise

b) Ground lead length of oscilloscope probe shall be • 0.25 inch.
c) Measurements made where the cable connectors attach to the load.
d) Outputs bypassed at the point of measurement with a parallel combination of 10uF

tantalum capacitor in parallel with a 0.1uF ceramic capacitors.
e) Oscilloscope bandwidth of 0 Hz to 20MHz.
f) Measurements measured at locations where remote sense wires are connected.
g) Regulation tolerance shall include temperature change, warm up drift and dynamic load

3.3 Dynamic Loading

The output voltages shall remain within the limits specified in Table 7 for the step loading
and within the limits specified in Table 8 for the capacitive loading. The load transient
repetition rate shall be tested between 50Hz and 5kHz at duty cycle ranging from 10%-90%.
The load transient repetition rate is only a test specification. TheΔstep load may occur
anywhere within the MIN load to the MAX load shown in Table 5 and Table 6.

Output

+5V

+3.3V

+12V

+5VSB

ep Load Size

Δ

30% of Max.

30% of Max.
30% of Max.
30% of Max.

Load Slew Rate
Load 0.5 A/uS

Load 0.5 A/uS
Load 0.5 A/uS

Load 0.5 A/uS

Table 8 - Transient Load requirements

Capacitive Load

1000 uF
1000 uF
2200 uF

100uF

04

3.4 Capacitive Loading

The power supply shall be stable and meet all requirements, except dynamic loading
requirements, with the following capacitive loading ranges.

Output

+5V

+3.3V

+12V
+12V

+5VSB

MIN MAX Units

10
10 uF
10

1
1

12,000
12,000
11,000

350
350

Table 9 - Capacitive Loading Conditions

uF

uF
uF
uF

3.5 Timing Requirements

These are the timing requirements for the power assembly operation. The output voltages
must rise from 10% to within regulation limits (Tvout_rise) within 5 to 200mS. The +5V,
+3.3V and +12V output voltages should start to rise at about the same time. All outputs
must rise monotonically. The +5V output needs to be greater than the +3.3V output during
any point of the voltage rise. The +5V output must never be greater than the +3.3V output
by more than 2.25V. Each output voltage shall reach regulation within 50 mS (Tvout_on) of
each other during turn on of the power supply. Each output voltage shall fall out of
regulation within 400 mS (Tvout_off) of each other during turn off. Figure 1 and figure 2
show the turn On and turn Off timing requirement. In Figure 2, the timing is shown with

both AC and PSON# controlling the On/Off of the power supply.

Item rin UnitsMIN MAX

Tvout_rise 5 70 mS

Tvout_on 50 mS
Tvout_off

Output voltage rise time from each main output.(+5Vsb < 70mS)

All main output must be within regulation of
each other within this time.

All main output must leave regulation within this time

Table 10 - Output Voltage Timing

400

mS

05

Vout

V1

V2

V3

V4

Tvout_rise

ST55GF

10%Vout

Tvout_on Tvout_off

Figure 1 :Output VoltageTiming

Item rin

Tsb_on-delay

Tsb_on-delay

Tvout_holdup

Tpwok_holdup

Tpson_on_delay

Tpson_pwok

Tpwok_on

Tpwok_off

Tpwok_low

Tsvt

Delay from AC being applied to +5VSB being within regulation
Delay from AC being applied to all output voltages being

within regulation.
Time all output voltage stay within regulation after loss of AC

Delay from loss of AC deassertion of PWOK.
Delay from PSON# active to output voltage within regulation

limits.
Delay from PSON# deactive to PWOK being deasserted.
Delay from output voltage within regulation limits to PWOK

asserted at turn on.
Delay from PWOK deasserted to output voltages (+5V, +3.3V,

+12V, -12V) dropping out of regulation limits.
Duration of PWOK being in the deasserted state during an

off/on cycle using AC or the PSON# signal. .
Delay from +5VSB being in regulation to O/Ps being in

regulation at AC turn on.

UnitsMIN MAX

mS

1500

mS

2500

400

500

mS
mS

mS

mS

50

mS

mS

mS

mS

18
17

5

100

1

100

50 1000

Table 11 - Turn On/OffTiming

06

AC Input

Vout

AC off AC on

Tsb_holdup

Tpwok_low

Tsb_on-delay

Tpwok on

Tpson_on_delay

Tsb_on-delay

PWOK

+SVSB

Tac_on-delay

Tsb_vout

Tpwok_on

Tpwok_off

Tpwok_holdup

Tvout_holdup
Min 70mS

PSON#

AC turn on/off cycle

Figure 2: Turn On/OffTiming

PSON turn on/off cycle

3.6 Power Good Signal: PWOK

PSOK is a power OK signal and will be pulled HIGH by the power supply to indicate that

all the outputs are within the regulation limits of the power supply. When any output voltage
falls below regulation limits or when AC power has been removed for a time sufficiently
long so that power supply operation is no longer guaranteed, PWOK will be de-asserted to a
LOW state. See for a representation of the timing characteristics of PWOK. The start of
PWOK delay time shall inhibited as long as any power supply output is in current limit.

Signal

PWOK = High
PWOK = Low Power is Not OK

Logic level low v oltage, Isink = 4mA
Logic level high voltage, Isource = 200

Sink current, PWOK = Low
Source current, PWOK = High

PWOK delay: Tpwok_on
PWOK rise and fall time
PWOK down delay : Tpwok_of f

Open collector/drain output from power supply .
Pull-up to VSB located in po wer supply.

Power OK

MIN

0V

• A

2.0V

100mSec

2mSec

Table 12 - PWOK Signal Characteristics

MAX

0.4V

5.25V
4mA

2mA

1000mSec

100mSec
200mSec

Tpwok_off

Tpson_pwok

07

ST55GF

3.7 Remote On/Off Control: PSON#

The PSON# signal is required to remotely turn on/off the power supply. PSON# is an active
low signal that turns on the +5V, +3.3V, +12V and -12V power rails. When this signal is not
pulled low by the system, or left open, the outputs (except the +5VSB and Vbias) turn off.
This signal is pulled to a standby voltage by a pull-up resistor internal to the power supply.

Signal

PSON# = Low

Accepts an open collector/drain input from the
system. Pull-up to VSB located in po wer supply.

Power ON

PSON# = Open Power OFF

Logic level low (Power supply ON)
Logic level low (Power supply OFF)

Source current, Vpson = Low
Power up delay: Tpson_on_delay

PWOK delay : Tpson_pwok

MIN

0V

2.4V

5mSec

Table 13 - PWOK Signal Characteristics

MAX

0.8V

5.25V
4mA

400mSec

50mSec

3.8 Overshoot at Turn-on /Turn-off

Any output overshoot at turn on shall be less than 10% of the nominal output value. Any
overshoot shall recover to within regulation in less than 10ms.

3.9 Efficiency

The minimum power supply system efficiency shall be ] 68%, measured at nominal input
voltage 115 V or 230 V and full loading.

3.10 +5VSB (Standby)

The +5VSB output is always on (+5V Standby) when AC power is applied and power
switch is turned on. The +5VSB line is capable of delivering at a maximum of 2.0A for PC
board circuit to operate.

4. Protection

The OPP function shall work at 130%~270% of rating of output power (when optional
external protectcard is not present), then all outputs shut down in a latch off mode. The latch
shall be cleared bytoggling the PSON# signal or by cycling the AC power. The power
supply shall not be damaged fromrepeated power cycling in this condition. If only one
module works inside the power supply, the OPP is at 110%~170% of rating of power supply.

08

4.1 Over Current Protection

The power supply should contain the OCP function on each hot swap module. The power
supply should beshut down in a latch off mode while the respective output current exceeds
the limit as shown in Table 8.

When the latch has been cleared by toggling the PSON# single or cycling the AC input
power. The powersupply module should not be damaged in this condition.

Voltage Minimum Maximum Shutdown Mode

+5V

+3.3V

+12V

110%
110%
110%

160%
160%
160%

Table 14 -Over Current protection

Latch Off
Latch Off
Latch Off

4.2 Over Voltage Protection

The power supply shall shut down in a latch off mode when the output voltage exceeds the
over voltage limit shown in Table 4.

Voltage Minimum Maximum Shutdown Mode

+5V

+3.3V

+12V

+5.7V
+3.9V

+13.3V

5VSB Auto recovery+5.7V

+6.5V
+4.5V

+14.5V

+6.5V

Table 15 -Over Voltage protection

Latch Off
Latch Off
Latch Off

09

4.4 Short Circuit Protection

The power supply shall shut down in a latch off mode when the output voltage is short
circuit.

4.5 No Load Operation
When the primary power is applied, with no load on any output voltage, no damage or

hazardous conditions shall occur. In such a case, the power supply shall power up and
stabilize.

5. Environmental Requirements

5.1 Temperature

Operating Temperature Range 0•C ~ 40•C (32•F ~ 104•F)

Non-Operating Temperature Range

5.2 Humidity

ST55GF

-40•C ~ 70•C (-40•F ~ 158•F)

Operating Temperature Range

Non-Operating Temperature Range

5.3 Altitude

Operating Temperature Range

Non-Operating Temperature Range

5.4 Mechanical Shock

The power supply (non-operating) shall not be damaged during a shock of 50G with an 11
mS half sin wave when non-operating. The shock to be applied in each of the orthogonal
axes.

5.5 Vibration (Operating and Non-operating)

The power supply shall be subjected to a vibration test consisting of a 10 to 300 Hz sweep at
a constant acceleration of 2.0g for duration of one (1) hour for each of the perpendicular
axes X, Y and Z,

1. 0.1 octave/minute. The output voltages shall remain within specification.

5.6 Acoustic Noise

The power supply shall be tested in accordance with specifications. The overall sound is
measured with the noise meter placed 1 meter from the nearest vertical surface of center of
fan installed in power supply.

20%~90%RH non-condensing

5%~95%RH non-condensing

Sea level to 10,000 ft
Sea level to 40,000 ft

CONDITIONS LIMITS:
115 VAC Input, full load of +5V Acoustic noise is 49 db maximum , 1A of +12V.

10

6. Agency Requirements

6.1 Safety Certification.

Product Safety

UL 60950-1 2000Edition, IEC60950-1, 3rd Edition
EU Low Voltage Directive (73/23/EEC) (CB)
TÜV

RFI Emission

PFC Harmonic
Flicker
Immunity against:

-Electrostatic discharge:

-Radiated field strength:

-Fast transients:

-Surge voltage:

-RF Conducted

-Voltage Dips and Interruptions

FCC Part15 ( Radiated & Conducted Emissions )
CISPR 22,3 Edition / EN55022: 1998 + A1: 2000)

EN61000-3-2:2000

EN61000-3-3: 1995 + A1: 2002

EN55024: 1998 + A1: 2001 and A2: 2003

-IEC 61000-4-2

-IEC 61000-4-3

-IEC 61000-4-4

-IEC 61000-4-5

-IEC 61000-4-6

-IEC 61000-4-11

rd

6.2 Input Leakage Current

Input leakage current from line to ground will be less than 3.5mA rms. Measurement will be
made at 240 VAC and 60Hz.

6.3 Production Line Testing

100% of the power supply production must have the following test performed. Each power
shall be marked indicating the testing was done and passed. Typically this is done by
stamping or labeling the power supply with "Hi-pot test OK".

6.4 Hi-Pot Testing

Each power supply must be Hi-pot tested according UL and TUV requirements, Minimum
typical testing voltage for Hi-pot testing are 1500Vac or 2121Vdc. However depending on
the power supply design the testing voltage May be higher. If higher the power supplies
shell be at the higher value.

6.5 Ground Continuity Testing
UL and TUV require that each power supply ground is tested, to ensure there is continuity

between the ground inlet of the power supply and the power supply chassis. This can be
performed with an ohm meter, or an electronic circuit that lights up and illustrates the
ground has continuity. Based on EN50116, ERG or TUV require that each power supply
ground id tested with a 25Amp ground test.

11

7. Redundant Power Supply Function:

7.1 Redundancy

The redundant power supply is 1+1=1 (460W+460W=460W) function power , each one
module is redundancy when any one module was failed.To be redundant each item must be
in the Hot swap power supply module.

7.2 Hot Swap Requirements

The redundant 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. During this
process the output voltage shall remain within the limits specified in Table 7 with the
capacitive load specifiedTable 9. The Sub-system shall not exceed the maximum inrush
current as specified in section 2.2. The power supply can be hot swapped by the following
methods:

X

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.

X

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: TheAC 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(must use the same model) , 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.

(550W+550W=550W)

ST55GF

7.3 LED Indicators

There shell be a single bi-color LED or Two LEDs, one AMBER and one GREEN, on each
hot swap power module to indicate power supply status. When AC is applied to the power
supply and standby voltage are available the GREEN LED shall BLINK. The GREEN LED
shall turn ON to indicate that all the power outputs are available.TheAMBER LED shall
turn ON to indicate that the power supply has failed, shutdown due to over current, or
shutdown due to component failure. The LED(s) shall be visible on the power supply's
exterior face. The LED location shall meet ESD requirements. LED shall be securely
mounted in such a way that incidental pressure on the LED shall not cause it to become
displaced.

12

8. Reliability

8.1 Mean Time Between failures (MTBF)

The MTBF of the power supply shall be calculated utilizing the Part-Stress Analysis method
of Bellcore MIL217F. The calculated MTBF of the power supply shall be greater than
100,000 hours under the following conditions:

Full rated load, 120V AC input, Ground Benign, 25ᑻC

8.2 Warranty

Two (2) years manufacture's warranty.

Date code indicating the year (200X, X is the first code) and week (2, 3 Code is the week )
of manufacture.

Technical information in this specification is subject to change without notice.
The revision of specification will be marked on the cover.

9. Connections

9.1 AC Input Connector

The AC input receptacle shall be an IEC 320 type or equivalent. The IEC 320 C receptacle
will be considered the mains disconnect.

9.2 DC Wire Harness and Connector Requirements

P1: 24-Pin ATX Motherboard Power Connector

Connector housing: 24- Pin Molex : 39-01-2240 or Equivalent Contact:Molex 44476-1111 or Equivalent

Pin

1

2

3

4

5

6

7

8

Signal Color Size Pin Signal Color Size

+3.3 VDC Orange 16 AWG

+3.3 VDC Orange 16 AWG

+3.3 VDC

COM

COM Black 18 AWG

COM Black 18 AWG

Orange

Black 18 AWG

Red

Red 18 AWG+5 VDC

GrayPW_OK 22 AWG

16 AWG

18 AWG+5 VDC

13

+3.3 VRS+ Brown

14

15

16

17

18

19

20

-12 VDC Blue

COM Black 18 AWG

PS_ON# Green

COM Black 18 AWG

COM Black 18 AWG

COM Black 18 AWG

N/C

22 AWG

18 AWG

22 AWG

13

9

10

11

12

5VSB Purple

+12 VDC

+12 VDC

+3.3 VDC

Yellow

Yellow

Orange

18 AWG

18 AWG

18 AWG

16 AWG

21

22

23

24

Red 18 AWG+5 VDC

Red

+5 VRS+

COM Black 18 AWG

Red

Red 18 AWG+5 VDC

18 AWG+5 VDC

22 AWG

ST55GF

P2: 8-Pin Processor Power Connector

Connector housing: 8- Pin Molex : 39-01-2080 or Equivalent Contact: Molex 44476-1111 or Equivalent

Pin

1

2

3

4

Signal Color Size Pin Signal Color Size

COM Black 18 AWG

COM Black 18 AWG

COM Black 18 AWG

COM Black 18 AWG

4-Pin HDD / CD ROM Drive Power Connectors

Connector housing: 4- Pin AMP: 1-480424-0 or Equivalent Contact: Amp 61314-1 or Equivalent

Pin

1

2

3

4

Signal Color Size

+12 VDC Yellow

COM

COM

+5 VDC

5

6

7

8

18 AWG

Black 18 AWG

Black 18 AWG

Red 18 AWG

18 AWG+12 VDC Yellow

18 AWG+12 VDC Yellow

18 AWG+12 VDC Yellow

18 AWG+12 VDC Yellow

Small 4-Pin : Floppy Disk Drive Power Connectors

Connector housing: 4- Pin AMP: 171822-4 or Equivalent

Pin

1

2

3

4

Signal Color Size

+5 VDC

COM

COM

+12 VDC Yellow

Red

Black 22 AWG

Black 22 AWG

10. Physical Characteristics Size

10.1 Dimension : 150.0mm(W) x 85.0mm(H) x 200.0mm(D)

10.2 Weight: 4.75 Kg

22 AWG

22 AWG

14

May,2008