SilverStone ST85F-GS User Manual

STRIDER GOLD S SERIES

SST-ST85F-GS /SST-ST75F-GS

World’s smallest, full-modular ATX power supplies

Compact design with a depth of 150mm for easy integration

80 PLUS Gold certification

100% modular cables

24/7 continuous power output with 40℃ operating temperature

Strict ±3% voltage regulation and low ripple & noise

Silent running 120mm fan with 18dBA minimum

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Class-leading single +12V rail

SilverStone Strider Gold

ST85F-GS
ST75F-GS

ATX12V / EPS 12V Switching Power Supply

With Active PFC

80Plus Gold

PS/2

This specification describes the requirements of 750W,850Watts switching power supply
with an stretch ATX form-factor and EPS 12V, +5V standby voltage,remote on/off control,
full range line input capability and forced air cooling characteristics.

1. AC INPUT

1.1 AC input requirements

The input voltage, current, and frequency requirements for continuous operation
are stated below.

Table 1 AC Input Line Requirements

Parameter
Vin( Full range )
Vin Frequency
Iin(750W)
Iin(850W)

Power factor correction (PF)>0.90 at full load.

Min.
90
47

Nom.
100---240
60-----50
10-------5
11-----5.5

Max.
264
63

Unit
VACrms
Hz
Arms
Arms

ST85F-GS / ST75F-GS

1.2 Inrush current regulation

The power supply must meet inrush requirements for any rated AC voltage, during
turn on at any phase of AC voltage, during a single cycle AC dropout condition,
during repetitive ON/OFF cycling of AC, and over the specified temperature range
(Top). The peak inrush current shall be less than the ratings of its critical components
(including input fuse, bulk rectifiers, and surge limiting device).

2. DC OUTPUT

2.1 DC voltage regulation

Parameter
+3.3V
+5V
+12V

-12V
+5VSB

Note:

1.Voltage tolerance is requied at main connector and S-ATA connector(if used)

2.Output transient response tested DC voltage regulation range +5V,+12V,+3.3V ±5%

2.2 Load ranges

2.2.1: SST-ST75F-GS Load Range

Parameter

Range

+/-3％
+/-3％
+/-3％

+/-10％

+/-5％

Min(optional)

Min
+3.20
+4.85

+11.64

-13.20
+4.75

Nom.

Nom.
+3.30
+5.00

+12.00

-12.00
+5.00

Max

Max
+3.40
+5.15

+12.36

-10.80
+5.25

Unit
Volts
Volts
Volts
Volts
Volts

Unit
+3.3V
+5V
+12V

-12V
+5VSB

1.Maximum continuous total DC output power should not exceed 750W.

2.Maximum continuous combined load on +3.3VDC and +5VDC outputs shall not exceed
150W.

3.Maximum combined current for the +12V outputs shall be 62A(744W).

4.When +12V is load to 28A , -12V minimum load is 0.02A.

5.Peak total DC output power should not exceed 800W.

6.Peak power can be supported for 12 second.

0.5

0.3

1.0
0

0.1

-

-

-

-

-

22
25
62

0.3

3.5

Amps
Amps
Amps
Amps
Amps

2.2.2: SST-ST85F-GS Load Range

Parameter
+3.3V
+5V
+12V

-12V
+5VSB

1.Maximum continuous total DC output power should not exceed 850W.

2.Maximum c.ontinuous combined load on +3.3VDC and +5VDC outputs shall not exceed
150W.

3.Maximum combined current for the +12V outputs shall be 70A(840W).

4.When +12V is load to 28A , -12V minimum load is 0.02A.

5.Peak total DC output power should not exceed 900W.

6.Peak power can be supported for 12 second.

2.3 Output Ripple

2.3.1 Ripple regulation

Min

0.5

0.3
1
0

0.1

Nom.

-

-

-

-

-

Max

22
25
70

0.3

3.5

Unit
Amps
Amps
Amps
Amps
Amps

Parameter
+3.3V
+5V
+12V

-12V
+5VSB

2.3.2 Definition

The ripple voltage of the outputs shall be measured at the pins of the output connector
when terminated in the load impedance specified in figure 1. Ripple and noise are
measured at the connectors with a 0.1uF ceramic capacitor and a 10uF electrolytic
capacitor to simulate system loading. Ripple shall be measured under any condition of
line voltage, output load, line frequency,operation temperature.

Ripple&Noise

50

50
120
120

50

Unit
mVp-p
mVp-p
mVp-p
mVp-p
mVp-p

2.3.3 Ripple voltage test circuit

ST85F-GS / ST75F-GS

Power Supply

AC H ot

AC Neutral

V o ut

V re tu rn

AC Ground

Figure 1. Ripple voltage test circuit

10uF 0.1uF

Load

Scope

2.4 Overshoot

Any overshoot at turn on or turn off shall be less 10% of the norminal voltage value,
all outputs shall be within the regulation limit of section 2.0 before issuing
the power good signal of section 5.0.

2.5 Efficiency

Power supply efficiency typical 87% for 750W 850W normal voltage at full load on
all outputs.

2.6 Remote ON/OFF control

When the logic level "PS-ON" is low, the DC outputs are to be enabled.
When the logic level is high or open collector, the DC outputs are to be disabled.

3.0 PROTECTION

3.1 Over current protection

The power supply shall have current limit to prevent the +3.3V,+5V,and +12V1,+12V2
outputs from exceeding the values shown in the following Table.If the current limits are
exceeded the power supply shall shutdown and latch off.

SST-ST75F-GS

Voltage
+12V
+5V
+3.3V

SST-ST85F-GS

Voltage
+12V
+5V
+3.3V

3.2 Over Temperature Protection

The power supply will be protected against over temperature conditions caused by loss
of fan cooling or excessive ambient temperature.In an OTP condition the PSU will
shutdown.When the power supply temperature drops to within specifide limits,the power
supply shall restore power automatically.The OTP circuit must have built in hysteresis
such that the power supply will not oscillate on and off due to temperature recovering
condition.

Over Current Limit (Iout limit)
65A minimum; 95A maximum
28A minimum; 45A maximum
24A minimum; 40A maximum

Over Current Limit (Iout limit)
72A minimum; 105A maximum
28A minimum; 45A maximum
24A minimum; 40A maximum

3.3 Over-power protection

The power supply will be shutdown and latch off when output power within 110~180%
of rated DC output.
Note: Assurance machine can work at low voltage,full load won't damage machine.

3.4 Under voltage protection

In an under voltage fault occurs, the supply will latch all DC outputs into a shutdown
state when +12V,+5V & +3.3V outputs under 85% of it's maximum value.

3.5 Over voltage protection

The over voltage sense circuitry and reference shall reside in packages that are separate
and distinct from the regulator control circuity and reference.No single point fault shall
be able to cause a sustained over voltage condition on any or all outputs.The supply
shall provide latch-mode over voltage protection as defined in Table.

output
+12 VDC
+5 VDC

Minimum

13

5.5

Nominal

15

6

Maximum

17

7

Unit
Volts
Volts

+3.3 VDC

3.6

4

5

Volts

ST85F-GS / ST75F-GS

3.6 Short circuit

An output short circuit is defined as any output impedance of less than 0.1 ohms.
The power supply shall shut down and latch off for shorting the +3.3 VDC,+5 VDC,
or+12 VDC rails to return or any other rail. Shorts between main output rails and +5VSB
shall not cause any damage to the power supply. The power supply shall either shut
down and latch off or fold back for shorting the negative rails.+5VSB must be capable of
being shorted indefinitely,but when the short is removed,the power supply shall recover
automatically or by cycling PS_ON#.The power supply shall be capable of withstanding
a continuous short-circuit to the output without damage or overstress to the unit.

3.7 No load operation

No damage or hazardous condition should occur with all the DC output connectors
disconnected from the load.The power supply may latch into the shutdown state.

4. TIMING

4.1 Signal timing drawing

Figure 2. is a reference for signal timing for main power connector signals and rails.

Figure 2. PS-OK Timing Sequence
(1) T3: Power good signal turn on delay time (100ms~500ms)
(2) T4: Power good signal turn off delay time (1ms min)
(3) T2: Rise time (0.1~70ms)
(4) T6: Hold up time

4.2 Hold up time

When the power loss its input power, it shall maintain 17ms in regulation limit at normal
input voltage. ( Tested at 75% of maximum load and 100-240VAC input ).

5. ENVIRONMENT

5.1 Operation

Temperature
Relative Humidity

0 to 40 C
10 to 90%, non-condensing

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5.2 Shipping and Storage

Temperature
Relative Humidity

-20 to 60 C
5 to 95%, non-condensing

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5.3 Altitude

Operating
Storage

10,000FT max
50,000FT max

6. SAFETY

6.1 Underwriters Laboratory (UL) recognition.

The power supply designed to meet UL 1950.

6.2 The power supply must bear the German Bauart Mark from TUV.

7. ELECTROMAGNETIC COMPATIBILITY (EMC)

7.1 ELECTROSTATIC DISCHARGE (ESD) - EN 61000 – 4 - 2：2008

7.2 ELECTRICAL FAST TRANSIENT / BURST ( EFT/B) – EN 61000 – 4 - 4：2010

7.3 SURGE – EN 61000 – 4 - 5：2005

7.4 POWER FREQUENCY MAGNETIC FIELD – EN 61000 – 4 - 8：2009

7.5 VOLTAGE DIPS – RN 61000 – 4 - 11：2004

7.6 RADIATED SUSCEPTIBILTY – EN 61000 – 4 – 3 ：2006

7.7 CONDUCTED SUSCEPTIBILTY – EN 61000 – 4 - 6：2008

7.8 VOLTAGE FLUCTATION - EN 61000 – 3 – 3 ：2008

7.9 EN61000-3-2 harmonic current emissions.

If applicable to sales in Europe, the power supply shall meet the requirements of
EN 61000-3-2 Class D and the Guidelines for the Suppression of Harmonics in
Appliances and General Use Equipment Class D for harmonic line current content
at full-rated power.

ST85F-GS / ST75F-GS

7.10 EN55022 Class B Radio interference (CISPR 22).

7.11 FCC Part 15, Subpart J class B 115VAC operation.

8. MTBF

8.1 MTBF (mean time between failures) calculation

The demonstrated MTBF shall be 100,000 hours of continuous operation at 25oC,
at 80% load, and nominal line. The MTBF of the power supply be calculated in
accordance with MIL-HDBK-217F. The DC FAN is not included.

9. MECHANICAL REQUIREMENTS

9.1 Physical Dimension

150 mm (W) × 86 mm (H) × 150mm (D)

9.2 Connectors

M/B 24PIN connector

Orange
Blue
Black
Green
Black
Black

Signal

+3.3V

-12VDC
COM

PS-ON

COM
COM

Pin

13
14
15
16
17
18

Pin

1
2
3
4
5
6

Signal

+3.3V
+3.3V

COM

+5VDC

COM

+5VDC

Orange
Orange

Black

Red

Black

Red
Black
White
Red
Red
Red
Black

COM

N/C
+5VDC
+5VDC
+5VDC

COM

19
20
21
22
23
24

7
8
9

10

11

12

COM

PWRGOOD

+5Vsb

+12V
+12V

+3.3V

Black

Grey
Purple
Yellow
Yellow

Orange

EPS 12V 8PIN connector

Signal
Yellow
Yellow
Yellow
Yellow

ATX 12V 4PIN (4+4PIN EPS 12V in split mode)

Black
Black

+12V
+12V
+12V
+12V

Signal

GND
GND

Pin

1
2

Pin

5
6
7
8

Pin

3
4

Pin

1
2
3
4

Signal

COM
COM
COM
COM

Signal

+12V
+12V

Yellow
Yellow

Black
Black
Black
Black

4PIN peripheral connector (HDD) 4PIN floppy connector (FDD)

Signal
Yellow
Black
Black
Red

SATA connector

Orange
Black
Red

+12V
COM
COM

+5VDC

Signal
+3.3V

COM

+5V

Pin

5
4
3

Pin

1
2
3
4

Pin

1
2
3
4

Signal

+5VDC

COM
COM
+12V

Red
Black
Black

Yellow

Black
Yellow

COM
+12V

2
1

8PIN PCI Express connector

ST85F-GS / ST75F-GS

Signal
Yellow
Yellow
Yellow
Black sense1

6PIN PCI Express connector

Yellow
Yellow
Yellow

+12V
+12V
+12V
COM

Signal

+12V
+12V
+12V

Pin

1
2
3
4

Pin

1
2
3

Pin

5
6
7
8

Pin

4
5
6

Signal

COM
COM
COM
COM

Signal

COM
COM
COM

Black
Black
Black
Black

Black
Black
Black

lssue date: June, 2013

NO. G11219600