SFX-L Form Factor
SX500-LG
A pioneering SFX-L form factor power supply
Silent running 120mm fan with intelligent semi-fanless operation
Support standard SFX-L form factor and ATX via included bracket
500W continuous power output at 40C operating temperature rated for 24/7 operation
High efficiency with 80 PLUS Gold certification
o
Strict ±3% voltage regulation and low ripple & noise
All cables made with flexible flat arrays
Class-leading single +12V rail with 40A
Support dual PCI-E 8/6pin connectors
100% modular cables
Active PFC
Installation and system optimization guide:
The following manual and guides were carefully prepared by the SilverStone engineering team to
help you maximize the potential of your SilverStone product. Please keep this manual for future
reference when upgrading or performing maintenance on your system. A copy of this manual can also
be downloaded from our website at:
General
Input Characteristics
Output Characteristics
Protection
Start Stability
Environments
Product Safety
Power Good Signal
MTBF
Harmonics
Power Factor
Mechanical Specification
P.1
P.1
P.2
P.4
P.5
P.5
P.6
P.7
P.8
P.8
P.8
P.8
SPECIFICATION
SFX-L Form Factor
SST-SX500-LG
500W Switching Power Supply
With Active PFC
80 Plus Gold
1. General
1.1 Scope
This specification defines the performance characteristics of a single phase 500 watts, 5output power
supply. This specification also defines worldwide safety and electromagnetic compatibility requirements
for the power supply which is intended for use in computer products.
2. Input Characteristics
2.1 Input Voltage
Nominal Voltage
Voltage Variation Range
100-240 Vrms
2.2 Input Frequency
Nominal Frequency
50-60Hz
* The power supply must operate at above frequency with 90 - 264VACrms input voltage range.
01
90 - 264 Vrms
Frequency Variation Range
47 Hz to 63 Hz
2.3 Max. Input AC Current
Max. Input Current
Measuring Range
7.0A
90 - 264Vrms
2.4 Inrush Current
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. The peak inrush current shall be less than the ratings of its critical
components (including input fuse, bulk rectifiers, and surge limiting device).
2.5 Efficiency
SST-SX500-LG provides an efficiency of 87% when measured at full load under 115V/60 and 230V/50Hz
condition.
3. Output characteristics
3.1 Normal Operation Output
Output
Voltage
+5V
+3.3V
+12V
-12V
+5Vsb
Load
MIN
0A
0A
0A
0A
0A
Range
MAX
20A
20A
40A
0.3A
3.0A
Peak
-
-
-
-
-
Regulation
±5%
±5%
±5%
±10%
±5%
Ripple
P-P Max.
50mV
50mV
120mV
120mV
50mV
Ripple & Noise
P-P Max.
50mV
50mV
120mV
120mV
50mV
Maximum continuous total DC output power should not exceed 500W.
Maximum continuous combined load on +3.3VDC and +5VDC outputs shall not exceed 105W.
Maximum combined load on 12V outputs shall not exceed 480W.
NOTE:
Noise test should be measured with 20 MHz bandwidth frequency oscilloscope. The output terminal
shall add a tantalum capacitor of 10uF in parallel with a ceramic capacitor of 0.1uF.
02
3.2 Remote On/Off Controlled mode
The PSON# signal is required to remotely turn on/off the power supply, PSON# is an active low signal
that turns on the output power rails. When this is not pulled low by the system, or left open, the outputs
(except the +5VSB) turn off. This signal is pulled to a standby voltage by a pull-up resistor internal to the
power supply.
TTL level "H" 2.0 V - 5.25 V
"L" 0.0 V – 1.0 V
3.3 Regulation
The cross regulation defined as follows, the output regulation should be within the specified range.
Load
Light Load
Typical Load
Full Load
+5V
2.1A
5.24A
10.48A
+3.3V
2.1A
5.24A
10.48A
+12V
6.62A
16.56A
33.14A
-12V
0.05A
0.12A
0.25A
+5Vsb
0.5A
1.24A
2.49A
3.4 Rise Time
DC output rise time is less than 20 mS at nominal line and full load.
3.5 Hold-up Time
DC +5V output maintains at least16mS is full 1oad after power off which hold within para 3.1 under
115V/60Hz and 230V/50Hz condition.
3.6 5VSB
5VSB is requierd for the implementation of PS-ON described above. 5VSB is a standby voltage that may
be used to power circuits that require power input during the powered-down state of all power rails. The
5 VSB pin should deliver 5V ± 5% at a minimum of 3A for PC board circuits to operate. Conversely, PC
board should draw no more than 3A maximum form this pin. This power may be used to operate circuits
such as soft power control.
03
3.7 PG-OK
PG-OK is a power good signal and should be asserted high by power supply to indicate that the +5 VDC
and +3.3 VDC outputs are above the under-voltage thresholds of the power supply. When this signal is
asserted high, there should be sufficient mains energy stored by the converter to guarantee continuous
power operation within specification. Conversely, when either the +5VDC or the +3.3VDC output voltage
falls below the under-voltage threshold, or when mains power has been removed for a time sufficiently
long so that power supply operation is no longer guaranteed, PG-OK should be deasserted to a low state.
See Figure 1 for a representation of the timing characteristics of the PG-OK,PS-ON, and germane power
rail signals.
3.8 3.3V Sense
A default 3.3V sense line should be implemented pin 13 of the connector.
3.9 Capacitive Load
The power supply should be able to power up and operate normally with the following capacitances
simultaneously present on the DC outputs.
Output
+5V
+12V
+3.3V
-12V
+5VS
Capacitive load (uF)
10,000
20,000
10,000
350
350
4. Protection
4.1 Input Protection
In primary circuit of the power supply , a protected fuse is inserted. Only internal fault of the power supply
will cause the fuse blown. Any overload or short circuit at DC output will keep from fuse brown or fire hazard.
4.2 Output Protection
4.2.1 Under voltage protection
The +5V/+3.3V DC output are protected against the under voltage condition . range value can't be
exceed 3.3~3.7V at 5V terminal and 2.0~2.4V at 3.3V.
04
4.2.2 Over Voltage Protection
The +5V/+12V/+3.3V DC output are protected against the over voltage condition . Maximum value
can't be over 6.5V at 5V terminal and 16.0V at 12V, 4.5V at 3.3V.
4.2.3 Over Power Protection
The power supply can be used electronic circuit to limit the output current against exceeding 50%
of surge output power or protected against excessive power delivery since short circuit of any output
or over total power at high line.
4.2.4 Short Circuit Protection
Short circuit placed on +5V,+12V,+3.3V,-12V will latch off. +5VSB will auto-recovery.
5. Start Stability
5.1 No Load Start
When power is applied to SST-SX500-LG with no load connected or under minimum load connected,
neither damage to power supply nor hazards to users will occur.
5.2 Cold Start
The power supply shall operate properly when first applied at normal input voltage and or so maximum
load after 4 hours storage in 0℃ environment.
6. Environments
6.1 Temperature and Humidity
6.1.1 Operating
Temperature
Relative Humidity
05
0 to 40 C
20 to 90 %
o
6.1.2 Storage
Temperature
Relative Humidity
-40 to 70 C
20 to 95 % noncondensing
o
6.2 Altitude
The power supply can operate normally at any altitude between 0 to 10000 feet.
6.3 Vibration and Shock
Sweep and resonance search for each of X,Y,Z, axis at the sweep.
RATE of 1/OCTAVE/Min.
Frequency
5-55-10 Hz
Duration
30 minutes
Amplitude
0.35 mm
7. Product Safety
7.1 Safety Requirement
CE
7.2 Leakage Current
The AC leakage current is less than 3.5mA when the power supply connect to 253Vac/50Hz .
7.3 Insulation Resistance
The insulation resistance should be not less than 30M ohm after applying of 500VDC for 1 minute.
7.4 Dielectric Voltage Withstand
The power supply shall withstand for 1 minute without breakdown the application of a 60Hz 1500V AC
voltage applied between both input line and chassis (20mA DC cut-off current). Main transformer shall
similarly withstand 3000Vac applied between both primary and secondary windings for a minimum of
one minute.
06
8. Power Good Signal
A TTL compatible signal for the purpose of initiating an orderly start-up procedure under normal input
operating conditions. During power up, this signal is asserted ( low ) until +5V is under regulation and AC
reaches min. line specification range. After all voltage are going appropriate level, the system may have a
turn on delay of 100mS, but no greater than 500mS. During power off the signal should go to low level
before +5V is out of regulation. The low level is 0 to 0.8V and high level is 4.75 to 5.25V. The " Power Good "
signal can drive up to 6 standard TTL loads.
Time Diagram Figure 1
* T1 : Turn on time ( 2 sec. Max.)
* T2 : Rise time ( ≦ 20mS Max.)
* T3 : Power good turn on delay time ( 100 < T3 < 500 mS )
* T4 : Switch on time (0.5 sec. Max.)
* T5 : Power good turn off delay time ( 1.0 mS Min.) PS-ON/OFF
* T6 : Power hold-up time (16 mS Min.)
* Power on-off cycle :
When the power supply is turned off for a minimum of 2.0 sec. and turn on again, the power good signal
will be asserted.
07
9. MTBF
The MTBF of the power should be 100,000 hours min.
10. Harmonics
The product shall meet requirement for EN61000-3-2 & EN61000-3-3 :2003 standard of class D, test at
230Vac 50Hz.
11. Power Factor
The power supply with active power factor correction, and meet the EN61000-3-2 standards, The power
factor is greater than 0.95 at 230V/50Hz, Max. load.
12. Mechanical Specification
125 mm (W) × 63.5 mm (H) × 130 mm (D)
08
G11222240
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