NIGHTJAR SERIES
SST-ST40NF
Optimum fan-less power supply
with stability and silence
SilverStone Nightjar ST40NF
GENERAL DESCRIPTION AND SCOPE
REFERENCE DOCUMENTS
ATX12V 2.3 Switching Power Supply
With Active PFC
PS/2 400W
GENERAL DESCRIPTION AND SCOPE
This is the specification of Model SST-ST40NF; AC-line powered switching power supply
with active PFC (Power Factor Correction) circuit, meet EN61000-3-2 and with AC
Input features 99Vac~264Vac.
REFERENCE DOCUMENTS
The subject power supply will meet the EMI requirements and obtain main safety approvals
as following:
2.1 REFERENCE DOCUMENTS
- FCC Part 15 Subpart J, Class ‘B’ 115 Vac operation.
- CISPR 22 Class ‘B’ 230 Vac operation.
2.2 SAFETY
NEMKO EN 60950-1
- VDE EN 60950-1
- UL 60950-1
- CB EN 60950-1
IEC 60950-1
- CE :
EN 55022:1998+A1: 2000, Class B
EN 61000-3-2: 2000
EN 61000-3-3: 1995+A1: 2001
CISPR22: 1997+A1: 2000, Class B
AS/NZS CISPR 22: 2002, Class B
EN 55024: 1998+A1: 2001
IEC 61000-4-2: 2001
IEC 61000-4-3: 2002
IEC 61000-4-4:1995
+A1:2000+A2: 2001
IEC 61000-4-5: 2001
IEC 61000-4-6: 2001
IEC 61000-4-8: 2001
IEC 61000-4-11: 2001
3. INPUT ELECTRICAL SPECIFICATIONS
3. INPUT ELECTRICAL SPECIFICATIONS
4. ELECTRICAL REQUIREMENTS
3.1 AC INPUT
SST-ST40NF
Parameter
Vin Voltage
Vin Frequency
3.2 INRUSH CURRENT
(Cold start – 25 deg. C)
115V
230V
3.3 INPUT LINE CURRENT
115V
230V
Min. Max. Unit
99
47 Hz
264
63
No damage
No damage
5.0 Amps – rms maximum
2.5 Amps – rms maximum
VAC
rms
Hz
4. ELECTRICAL REQUIREMENTS
4.1 OUTPUT ELECTRICAL REQUIREMENTS
The subject power supply will meet all electrical specifications below, over the full operation
temperature range and dynamic load regulation.
4.1.1. OUTPUT RATING
Output Nominal Regulation Ripple/Noise Min Max Peak
1
2
3
4
5
The +3.3V and +5V total output shall not exceed 130watts, total output power max shall
not exceed 400W ,
+3.3V
+5V
+12V
-12V
+5VSB
±3%
±3%
±3%
±10%
±5%
50mV
50mV
120mV
120mV
50mV
0A
0A
0.2A
0 A
0 A
20.0 A
14.0 A
27.0 A
0.5 A
2.5A
-
-
31.5A
-
3.5A
Ripple and noise measurements shall be made under all specified load conditions
through a single pole low pass filter with 20MHz cutoff frequency. Outputs shall bypassed
at the connector with a 0.1uF ceramic disk capacitor and a 10uF electrolytic capacitor to
simulate system loading.
02
4.2 EFFICIENCY
In Standby mode, +5Vsb efficiency should be greater than 50% with a minimum loading of
100mA under I/P 230Vac.
Efficiency
Loading Voltage Full load Typical load Light load
Required Minimum Efficiency
115V >82% >85% >82%
4.2.1 HOLD-UP TIME (@FULL LOAD)
99V ~264V: 17 mSec. Minimum.
The output voltage will remain within specification, in the event that the input power is
removed or interrupted, for the duration of one cycle of the input frequency. The interruption
may occur at any point in the AC voltage cycle. The power good signal shall remain high
during this test.
4.2.2 OUTPUT RISE TIM
For all output range voltages shall rise from 10% of nominal to within the regulation ranges
specified in Section 4.1.1 within 0.1 ms to 20 ms (0.1 ms T1 20 ms).
<
=
<
<
=
=
(10% TO 90% OF FINAL OUTPUT VALUE, @FULL LOAD)
4.2.3 OVER VOLTAGE PROTECTION
Voltage Source
+3.3V
+5V
+12V
Protection Point
3.7V-4.5V
5.7V-7.0V
13.1-15.6V
4.2.4 SHORT CIRCUIT PROTECTION
Output short circuit is defined to be a short circuit load of less than 0.1 ohm.
In the event of an output short circuit condition on +3.3V, +5V, -12V or +12V, the power supply
will shutdown and latch off without damage to the power supply. The power supply shall
return to normal operation after the short circuit has been removed and the power switch has
been turned off for no more than 2 seconds.
03
4.2.5 OVERLOAD PROTECTION
SST-ST40NF
OUTPUT VOLTAGE
+3.3V
+5V
+12V
Max. overcurrent limit
50A
48A
40A
4.2.6 POWER GOOD SIGNAL
The power good signal is a TTL compatible signal for the purpose of initiating an orderly
star-up procedure under normal input operating conditions. This signal is asserted (low)
until +5Vdc has reached 4.75 volts during power up. Characteristics:
TTTL signal asserted (low state) : less than 0.4V while sinking 4mA.
TTL signal asserted (high state): Between 2.4 V and 5 V output while sourcing 200 µA
High state output impedance: less or equal to 1Kohm from output to common.
POWER GOOD @ 99Vac~264Vac,FULL LOAD
100 –500mSec.
POWER FAIL @99Vac~264Vac, FULL LOAD
PS_ON ON
+3.3VO/P
+5V O/P
+12VO/P
P. G .
P.G. SENSE
LEVEL 95%
T1 T2 T3
1 mSec. minimum
OFF
<
T1 20mS
=
=
T2 100~500mS
<
T3 1mS
=
04
4.3 OUTPUT TRANSIENT LOAD RESPONSE
summarizes the expected output transient step sizes for each output. The
transient load slew rate is = 1.0 A/µs.
DC Output Transient Step Sizes
Output Max . step size
(% of rated output amps per Sec 4.1.1)
+12VDC
+5VDC
+3.3VDC
-12VDC
+5VSB
Load-changing repetition rate of 50 Hz to 10 kHz
Ac input range per section 3.1
Capacitive loading per section 4.5
4.4. PS_ ON#
PS_ON# is an active-low, TTL-compatible signal that allows a motherboard to remotely
control the power supply in conjunction with features such as soft on/off, Wake on LAN+,
or wake-on-modem.When PS_ON# is pulled to TTL low, the power supply should turn on
the five main DC output rails: +12VDC,+5VDC,+3.3VDC,and –12VDC. When PS_ON# is
pulled to TTL high or open-circuited, the DC output rails should not deliver current and
should be held at zero potential with respect to ground. PS_ON# has no effect on the
+5VSB output, which is always enabled whenever the AC power is present. Table lists
PS_ON# signal characteristics. The power supply shall provide an internal pull-up to TTL
high. The power supply shall also provide debounce circuitry on PS_ON# to prevent it from
oscillating on/off at startup when activated by a mechanical switch. The DC output enable
circuitry must be SELV-compliant.
Max. setp size
50%
30%
30%
-
-
(amps)
-
-
-
0.1A
0.5A
05
PS_ON# Signal Characteristics
VIL, Input Low Voltage
IIL, Input Low Current (Vin = 0.4V)
VIH, Input High Voltage (lin = -200μA)
VIH OPEN circuit, lin = 0
Min. Max.
0.0V
-
2.0V
-
0.8V
-1.6mA
-
5.25V
SST-ST40NF
5. ENVIRONMENTAL REQUIREMENTS
4.5 Capacitive Load
The power supply should be able to power up and operate normally with the following
capacitances simultaneously present on the DC outputs. This capacitive loading should be
used to check stability and should not be included for noise testing.
Output Capacitive Loads
Output ATX12V
Capacitive load (μF)
+12VDC
+5VDC
+3.3VDC
-12VDC
+5VSB
5. ENVIRONMENTAL REQUIREMENTS
5000
6000
6000
350
350
The power supply will be compliant with each item in this specification for the following
Environmental conditions.
5.1. TEMPERATURE RANGE
Operating
Storage
0 to 40C
-20 to 80C
O
O
5.2 HUMIDITY
Operating
Storage
5 –95% RH, Non-condensing
5 –95% RH, Non-condensing
06
5.3 VIBRATION
6. SAFETY
7. ELECTORMAGNETIC COMPATIBILITY
The subject power supply will withstand the following imposed conditions without experiencing
non-recoverable failure or deviation from specified output characteristics.
Vibration Operating – Sine wave excited, 0.25 G maximum acceleration, 10-250 Hz swept at one
octave / min. Fifteen minute dwell at all resonant points, where resonance is defined as those
exciting frequencies at which the device under test experiences excursions two times large than
non-resonant excursions.
Plane of vibration to be along three mutually perpendicular axes.
5.4 MECHANICAL SHOCK
Non-operating 50 g, trapezoidal input; velocity change 170 in/s
<
=
Three drops on each of six faces are applied to each sample.
6. SAFETY
6.1 LEAKAGE CURRENT
The leakage current from AC to safety ground will not exceed 3.5 mA-rms at 264Vac, 50 Hz.
7. ELECTORMAGNETIC COMPATIBILITY
7.1 LINE CONDUCTED EMI
The subject power supply will meet FCC and VFG class B requirements under full load
conditions.
7.2 RADIATED EMI
The subject power supply will meet FCC and CISPR 22 requirements under normal load
conditions.
07
SST-ST40NF
8. LABELLING
9.PHYSICAL REQUIREMENTS
8. LABELLING
Label marking will be permanent, legible and complied with all agency requirements.
8.1 MODEL NUMBER LABEL
Labels will be affixed to the sides of the power supply showing the following:
- Manufacturer’s name and logo.
- Model no., serial no., revision level, location of manufacturer.
- The total power output and the maximum load for each output.
- AC input rating.
9.PHYSICAL REQUIREMENTS
9.1 Physical Dimension
150 mm (W) × 86 mm (H) × 160mm (D)
9.2 Connectors Define
M/B 24PIN connector
Signal SignalPin Pin
Orange
Orange
Blue
Black
Green
Black
Black
Black
White
+3.3V
+3.3Vsense
-12VDC
COM
PS-ON
COM
COM
COM
N/C
13
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
+3.3V Orange
+3.3V
COM
+5VDC
COM
+5VDC
COM
PWRGOOD
Orange
Black
Red
Black
Red
Black
Grey
Red
Red
Red
Red
Black
+5VDC
+5VDC
+5Vsense
+5VDC
COM
21
22
22
23
24
9
10
11
12
+5Vsb
+12V
+12V
+3.3V
Purple
Yello w
Yellow
Orange
08
EPS 12V 8PIN connector
Signal SignalPin Pin
Yellow
Yellow
Yellow
Yellow
+12V
+12V
+12V
+12V
5
6
7
8
1
2
3
4
ATX 12V 4PIN (4+4PIN EPS 12V in split mode)
Signal SignalPin Pin
Black
Black
GND
GND
1
2
3
4
4PIN floppy connector (FDD)4PIN peripheral connector (HDD)
Signal SignalPin Pin
COM
COM
COM
COM
+12V
+12V
Black
Black
Black
Black
Yellow
Yellow
Yellow
Black
Black
Red
SATA connector
Orange
Black
Red
Black
Yellow
+12V
COM
COM
+5VDC
1
2
3
4
+3.3V
COM
+5V
COM
+12V
1
2
3
4
+5VDC
COM
COM
+12V
Red
Black
Black
Yellow
PinSignal
5
4
3
2
1
09
8PIN PCI Express connector
Signal SignalPin Pin
SST-ST40NF
Yellow
Yellow
Yellow
Black sense1
6PIN PCI Express connector
Yellow
Yellow
Yellow
+12V
+12V
+12V
COM
Signal SignalPin Pin
+12V
+12V
+12V
1
2
3
4
1
2
3
5
6
7
8
4
5
6
COM
COM
COM
COM
COM
COM
COM
Black
Black
Black
Black
Black
Black
Black
February, 2009
NO:G1120
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