SilverStone SST-NJ450-SXL User Manual

Nightjar Series

SST-NJ450-SXL

The definitive small form factor fanless power supply

Fan-less thermal solution, 0 dBA acoustics

SFX-L form factor for use in small form factor computers

High efficiency with 80 PLUS Platinum level of efficiency

100% modular short cables with flexible flat arrays

24/7 continuous power output with 40℃ operating temperature

Class-leading single +12V rail

PCI-E 8pin and PCI-E 6pin connectors support

SPECIFICATION

SFX-L Form Factor

SST-NJ450-SXL

450W Switching Power Supply

With Active PFC

Fanless Thermal Solution

80 PLUS Platinum

This specification describes the requirements of 450Watts with full
range voltage, switching power supply with a reliability SFX-L
small form factor standard

1.0 AC INPUT

1.1 AC input requirements

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

Parameter Min Nom Max Unit

Vin 90 100 -- 240 264 VACrms

Vin Frequency 47 60 -- 50 63 Hz

Iin(450W) -- 8 -- 4 -- Arms

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

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).

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2.0 DC OUTPUT

2.1 DC voltage regulation

Parameter Range Min Nom Max Unit

+3.3V ±3% +3.2 +3.3 +3.4 Volts

+5V ±3% +4.85 +5.0 +5.15 Volts

+12V ±3% +11.64 +12.0 +12.36 Volts

-12V ±10% -10.8 -12.0 -13.2 Volts

+5VSb ±5% +4.75 +5.0 +5.25 Volts

( 1 )At no load,3.3V output +/-5% regulation limits do not apply.

2.2 Load range

Parameter Min Nom Max Peak Unit

+3.3V 0 - 16 - Amps

+5V 0 - 15 - Amps

+12V 0 - 37.5 - Amps

-12V 0 - 0.3 - Amps

+5VSb 0 - 2.5 - Amps

( 1 ) The maximum combined load on +5V and +3.3V outputs shall not exceed 80W.
( 2 ) The maximum combined load on +12V outputs shall not exceed 450W(37.5A).
( 3 ) The maximum continuous average DC outputs power shall not exceed 450W.
( 4 ) The peak 500W DC outputs power shall last no more than 12s.

2.3 Output Ripple

2.3.1 Ripple regulation
Parameter Ripple&Noise Unit

+3.3V 50 mVp-p

+5V 50 mVp-p

+12V 120 mVp-p

-12V 120 mVp-p

+5VSb 50 mVp-p

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 figure1.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.

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2.3.3 Ripple voltage test circuit

AC Hot

AC Neutral

Power Supply

V out

V return

10uF 0.1uF

Load

Scope

AC Ground

Figure 1. Ripple voltage test circuit

2.4 Overshoot

Any overshoot at turn on or turn off shall be less 10% of the nominal 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 (90%/92%/89%) at 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-power protection

of rated DC output.

3.2 Over current protection

The power supply will be shutdown and latch off when output power over 110% ~ 160%

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

Voltage Over Current Limit (Iout limit)

+12V 45A minimum; 68A maximum

+5V 20A minimum; 45A maximum

+3.3V 20A minimum; 45A maximum

3.3 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 Minimum Nominal Maximum Unit

+12 VDC 13.4 15.0 16.5 Volts

+5 VDC 5.74 6.3 7.0 Volts

+3.3 VDC 3.76 4.2 5.1 Volts

3.4 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

3.5 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.

4.0 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)T2: Rise time (0.2ms~20ms)
(2)T3: Power good signal turn on delay time (100ms~500ms)
(3)T4: Power good signal turn off delay time (1ms min)
(4)T5: Rise time (10ms max)

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4.2 Output Transient Response

Table 13. summarizes the expected output transient step sizes for each output. The transient
load slew rate is =1.0A/us.
Table 13. DC Output Transient Step Sizes

Max.step size Max.step size

Output

+12 VDC 60%

+5 VDC

+3.3 VDC

-12 VDC
+5 VSB

(1) For example, for a rated +5 VDC output of 18A,the transient step would be 30% x 18A=5.4A
Output voltages should remin within the remain within the regulation limits of Section 2.1,
and the power supply should stable when subjected to load transients per Table 13.
from any steady state load, including any or all of the following conditions:
*Simultaneous load steps on the +12 VDC,+5 VDC,and +3.3 VDC outputs
(all steps occurring in the same direction)
*Load-changing repetition rate of 50 Hz to 10 kHz
*AC input range per Section 1.0

(% of rated output amps per Sec 3.2.3)(1)

40%
40%

4.3 Hold up time

When the power loss its input power, it shall maintain 16ms at 80% load in regulation limit
at nominal input voltage. (AC:115V/60Hz or 230V/50Hz)

(amps)

0.1A

0.5A

Voltage Over Current Limit (Iout limit)

+12V 45A minimum; 68A maximum

+5V 20A minimum; 45A maximum

+3.3V 20A minimum; 45A maximum

5.0 ENVIRONMENT

5.1 Operation

5.2 Shipping and Storage

Temperature 0℃ to 40℃

Relative Humidity 20% to 85%,on-condensing

Temperature -20℃ to 60℃

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Relative Humidity 10% to 95%,non-condensing

5.3 Altitude

Operating 2000m

Storage 3000m

6.0 SAFETY

6.1 Underwriters Laboratory (UL) recognition

The power supply designed to meet UL 60950

7.0 ELECTROMAGNETIC COMPATIBILITY (EMC)

7.1 ELECTROSTATIC DISCHARGE (ESD) – IEC 61000-4-2(EN 61000-4-2).

7.2 RADIATED SUSCEPTIBILTY – IEC 61000-4-3(EN 61000-4-3).

7.3 ELECTRICAL FAST TRANSIENT / BURST ( EFT/B) – IEC 61000-4-4
(EN 61000-4-4).

7.4 SURGE – IEC 61000-4-5(EN 61000-4-5).

7.5 CONDUCTED SUSCEPTIBILTY – IEC 61000-4-6(EN 61000-4-6).

7.6 POWER FREQUENCY MAGNETIC FIELD – IEC 61000-4-8(EN 61000-4-8).

7.7 VOLTAGE DIPS – IEC 61000-4-11(EN 61000-4-11).

7.8 VOLTAGE FLUCTUATIONS – IEC 61000-3-3 (EN 61000-3-3).

7.9 HARMONIC CURRENT EMISSION – IEC61000-3-2(EN 61000-3-2).

7.10 EN55032:Class B Radio interference (CISPR 22).

7.11 ANSI C63.4-2009 / FCC Part 15 Subpart B / ICES-003 lssue 5 Class B
115VAC operation.

8.0 MTBF

8.1 MTBF (mean time between failures) calculation

The demonstrated MTBF shall be 100,000 hours of continuous operation at 25℃ of full load
and 120V AC input. The MTBF of the power supply shall be calculated in accordance with
MIL-HDBK-217F. The DC FAN is not included.

9.0 MECHANICAL REQUIREMENTS

130mm(W) X 63.5mm(H) X125mm(D)

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G11233660