SX800-LTI
SFX-L Form Factor
A pioneering SFX-L form factor power supply
SFX-L form factor for use in small form factor computers
800W continuous power output rated for 24/7 operation
Class-leading single +12V rail with 66A
High efficiency with 80 PLUS Titanium certification
Silent running 120mm fan with advanced semi-fanless operation
100% modular short cables with flexible flat arrays
Strict ±3% voltage regulation and low ripple & noise
Support quad PCI-E 8/6pin connectors
High quality construction with all Japanese capacitors
SPECIFICATION
SFX-L Form Factor
SST-SX800-LTI
800W Switching Power Supply
With Active PFC
80Plus Titanium
01
1.1 AC input requirements
The input voltage, current, and frequency requirements for continuous operation are stated below.
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).
Power factor correction (PF)>0.90 at full load.
This specification describes the requirements of 800Watts with full range voltage, switching power supply
with a SFX-L form-factor and SFX 12V, +5V standby voltage, remote on/off .
1. AC INPUT
Parameter Min Nom Max Unit
Vin 90
100 --- 240
264 VACrms
Vin Frequency 47
60 --- 50
63 Hz
Iin
12 --- 6
Arms
02
2.1 DC voltage regulation
2.3 Output Ripple
2. DC OUTPUT
At no load,3.3V output ±5% regulation limits do not apply.
2.2 Load range
( 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 792W(66A).
( 3 ) The maximum continuous average DC outputs power shall not exceed 800W.
( 4 ) The peak 850W DC outputs power shall last no more than 12s.
2.3.1 Ripple regulation
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.
2.3.2 Definition
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
Parameter Min Nom. Max Peak Unit
+3.3V 0.1 - 16 Amps
+5V 0.2 - 15 Amps
+12V 0.15 - 66 Amps
-12V 0 - 0.3 Amps
+5VSb 0 - 2.5 Amps
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
03
2.3.3 Ripple voltage test circuit
Figure 1. Ripple voltage test circuit
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.
2.4 Overshoot
Power supply efficiency typical 90% for at normal voltage at full load on all outputs.
2.5 Efficiency
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. PROTECTION
2.6 Remote on/off control
The power supply will be shutdown and latch off when output power over 110% ~ 160% of rated
DC output.
3.1 Over-power protection
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.
3.2 Over current protection
AC Hot
AC Neutral
Power Supply
V out
V return
10uF 0.1uF
Load
Scope
AC Ground
Voltage Over Current Limit (Iout limit)
+12V 70A minimum; 90A maximum
+5V 20A minimum; 45A maximum
+3.3V 20A minimum; 45A maximum
04
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.
3.3 Over voltage protection
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.
3.4 Short circuit
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.
3.5 No load operation
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. TIMING
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
05
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.
4.3 Hold up time
5.1 Operation
5.2 Shipping and Storage
5.3 Altitude
When the power loss its input power, it shall maintain 13ms at 75% load in regulation limit at nominal input
voltage. (AC:115V/60Hz or 230V/50Hz)
Table 13. DC Output Transient Step Sizes
(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
5. ENVIRONMENT
M
Max.step size
O
Output
(
(% of rated output amps per Sec 3.2.3)
(
(1)
(
(amps)
+12 VDC 40%
+5 VDC 30%
+3.3 VDC 30%
-12 VDC 0.1A
+5 VSB 0.5A
Temperature
0℃ to 40℃
Relative Humidity 20% to 85%,on-condensing
Temperature -20 to 90
o
C
Relative Humidity 10% to 95%,non-condensing
Operating 10,000FT max.
Storage 50,000FT max.
06
6. SAFETY
6.1 Underwriters Laboratory (UL) recognition.
The power supply designed to meet UL 60950
8. MTBF
8.1 MTBF (mean time between failures) calculation
9. Mechanical Specification
125 mm (W) × 63.5 mm (H) × 130mm (D)
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.
7.1 ELECTROSTATIC DISCHARGE (ESD) - IEC 61000 – 4 - 2：2008
7.2 ELECTRICAL FAST TRANSIENT / BURST ( EFT/B) – IEC 61000 – 4 - 4：2012
7.3 SURGE – IEC 61000 – 4 - 5：2014
7.4 POWER FREQUENCY MAGNETIC FIELD – IEC 61000 – 4 - 8：2009
7.5 VOLTAGE DIPS – IEC 61000 – 4 - 11：2004
7.6 RADIATED SUSCEPTIBILTY – IEC 61000 – 4 – 3 ：2006+A1：2007+A2：2010
(IEC 61000 – 4 – 3： 2010)
7.7 CONDUCTED SUSCEPTIBILTY – IEC 61000 – 4 - 6：2008(IEC 61000 – 4 – 6：
2013)
7.8 VOLTAGE FLUCTATION - EN 61000 – 3 – 3 ：2008(EN 61000 – 3 – 3：2013)
7.9 EN61000-3-2：2006+A2：2009 harmonic current emissions.(EN 61000 – 3 – 2：
2014) 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.
7.10 EN55022：2010/AC：2011 Class B Radio interference (CISPR 22).
7.11 ANSI C63.4-2009/FCC Part 15, Subpart B/ICE-003 lssue 5 class B 115VAC
operation.
7. ELECTROMAGNETIC COMPATIBILITY (EMC)
NO. G11229450
