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SFX-L Form Factor
SX700-LPT
A pioneering SFX-L form factor power supply
SFX-L form factor for use small form factor computers
700W continuous power output rated for 24/7 operation
Silent running 120mm fan with advanced semi-fanless operation
Strict ±3% voltage regulation and low ripple & noise
High quality construction with all Japanese capacitors
Class-leading single +12V rail with 58.4A
High efficiency with 80 PLUS Platinum certification
100% modular short cables with flexible flat arrays
Support quad PCI-E 8/6pin connectors
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SPECIFICATION
SFX-L Form Factor
SST-SX700-LPT
700W Switching Power Supply
With Active PFC
80Plus Platinum
1. General
1.1 Scope
This specification defines the performance characteristics of a single phase 700 watts, 5 output 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
100-240 Vrms
2.2 Input Frequency
Nominal Frequency
50-60 Hz
* The power supply must operate at above frequency with 90-264 VACrms input voltage range.
01
Voltage Variation Range
90 - 264 Vrms
Frequency Variation Range
47 Hz to 63 Hz
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2.3 Max. Input AC Current
Max. Input Current
Measuring Range
10.0A
90 - 264 Vrms
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
SX700-LPT provides an efficiency of 90% at20% load, 92% at50% load, 89% at100% load under115V/60Hz
and 230V/50Hz condition.
3. Output characteristics
3.1 Normal Operation Output
Output Voltage
1. +5V
2. +3.3V
3. +12V
4. -12V
5. +5Vsb
Load MIN
0.0A
0.0A
0.0A
0.0A
0.0A
Range MAX
22A
22A
58.4A
0.3A
3.0A
Regulation
±3%
±3%
±3%
±10%
±5%
Ripple & Noise P-P Max.
50mV
50mV
120mV
120mV
50mV
Maximum continuous total DC output power should not exceed 700W.
Maximum continuous combined load on +3.3VDC and +5VDC outputs shall not exceed 120W.
Maximum combined load on 12V outputs shall not exceed 700W.
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.
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
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3.3 Regulation
The cross regulation defined as follows, the output regulation should be within the specified range.
Load
20%
50%
100%
+5V
2.41A
6.03A
12.07A
+3.3V
2.41A
6.03A
12.07A
+12V
9.74A
24.35A
48.69A
-12V
0.05A
0.13A
0.25A
+5Vsb
0.50A
1.25A
2.50A
Pout
140.0 W
350.0 W
700.0 W
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 least 16mS 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.
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
+5Vsb
03
Capacitive load (uF)
10,000
10,000
10,000
350
10,000
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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/+12V/+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 8.5~9.5V at 12V, 2.0~2.4V at 3.3V.
4.2.2 Over Voltage Protection
The +12V/ DC output are protected against the over voltage condition . Maximum value can't be over
15.5V at 12V.
4.2.3 Over Power Protection
The power supply can be used electronic circuit to limit the output current against exceeding 10%-60%
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.
4.2.5 Over-Current Protection
Current protection should be designed to limit the current to operate within safe operating conditions.
Over current protection schemes where only the voltage output that experiences the over current event
is shut off may be adequate to maintain safe operation of the power supply and the system; however,
damage to the motherboard or other system components may occur. The recommended over current
protection scheme is for the power supply to latch into the shutdown state. The setting of over current
protection for each output rail is as following.
4.2.6 Over-Temperature Protection
This power supply includes an over-temperature protection sensor, which can trip and shut down the
power supply at 110℃
5. Start Stability
5.1 No Load Start
When power is applied to SX700-LPT 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 0 to 40C
Relative Humidity 20 to 90 %
o
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6.1.2 Storage
Temperature -40 to 70C
Relative Humidity 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. Conducted EMI
CE,FCC
8. Product Safety
8.1 Safety Requirement
TUV CB TUV-cus
8.2 Leakage Current
The AC leakage current is less than 3.5mA when the power supply connect to 253Vac/50Hz .
8.3 Insulation Resistance
The insulation resistance should be not less than 30M ohm after applying of 500VDC for 1 minute.
8.4 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.
9. 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
signal can drive up to 6 standard TTL loads.
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" Power Good "
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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.
10. MTBF
The MTBF of the power should be 100,000 hours min.
11. Burn-In
11.1 Input Voltage
Applying 230Vac
11.2 Test Condition
Applying 80% loads for the power supply in 40 (+/-5) oC chamber for 4 hours.
12. Harmonics
The product shall meet requirement for EN61000-3-2 & EN61000-3-3 :2003 standard
of class D, test at 230Vac 50Hz.
13. 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.
14. Mechanical Specification
125 mm (W) × 63.5 mm (H) × 130mm (D)
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NO. G11227020
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