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PRODUCT SPECIFICATION Model: SS-400H2U Active PFC
Full Range Revision: 1.1
PRODUCT SPECIFICATION
File: EA-400H2U-02
Date: Feb., 16, 2005
SWITCHING POWER SUPPLY
Page: 1 of 1
SEA SONIC ELECTRONICS CO., Ltd.
Tel:+886-2-26590338
Fax:+886-2-26590530
1. SCOPE
2
2. AC INPUT
2
3. DC OUTPUT
2
3.1 VOLTAGE and CURRENT LOAD RANGES
2
3.2 CROSS REGULATION
2
3.3 OUTPUT RIPPLE and NOISE
3
3.4 DYNAMIC DC OUTPUT CHARACTERISTICS 3
3.5 DC OUTPUT ON/OFF CONTROL
3
4. OUTPUT PROTECTION
4
4.1 TOTAL POWER PROTECTION
4
4.2 OVER VOLTAGE PROTECTION
4
4.3 SHORT CIRCUIT PROTECTION
4
4.4 RESET AFTER SHUTDOWN
4
5. POWER GOOD SIGNAL
4
6. EFFICIENCY
4
6.1 AT FULL LOAD
4
6.2 ENERGY STAR MODE
4
6.3 STANDBY MODE
4
7. COOLING OF PSU
5
8. ACTIVE POWER FACTOR CORRECTION (PFC)
5
9. ENVIRONMENT
5
9.1 OPERATING
5
9.2 SHIPPING / STORAGE
5
10. MTBF
5
11. EMC
5
12. SAFETY
5
13.
MECHANICAL DRAWING
6 Model: SS-400H2U Active PFC
Full Range Revision: 1.1
PRODUCT SPECIFICATION
File: EA-400H2U-02
Date: Feb., 16, 2005
SWITCHING POWER SUPPLY
Page: 2 of 2
SEA SONIC ELECTRONICS CO., Ltd.
Tel:+886-2-26590338
Fax:+886-2-26590530
1. SCOPE
This specification defines electrical performance and characteristic of SS-400H2U Active PFC Full
Range Power supplies which comply with Intel EPS2U v2.1 and ATX12V v2.0 Requirements.

2.
AC INPUT :
RANGE
1.
Limits
Minimum
Maximum
Unit
AC Input voltage
90
264
Vac
AC Input frequency
47
63
Hz
AC Input Current
.
7
Amp(rms)
Inrush current
2.
(cold start)
100
Amp(peak)
Inrush current (warm start) NO COMPONENT OVER STRESSED.
NO FUSE BLOW
NO DAMAGE TO THE POWER SUPPLY.
NOTE: 1. The AC input is 90~264 Vac full range. No selectable hard switch is provided.
2. Measured at 25 Deg C Ambient

3. DC OUTPUT :
3.1 VOLTAGE and CURRENT LOAD RANGES
DC OUPTUT
Tolerance
+3.3VDC
+5%/-5%
+5VDC
+5%/-5%
+12VDC
+5%/-5%
Group1
-12VDC
+10%/-10%
Group2
+5Vsb
+5%/-5%
Load Range
Output
Minimum Load
Maximum Load
Peak Load
+12V1
1A
16A
19
A
+12V2
1A
17A
20
A
+5V
0.3A
21
A
X
+3.3V
0A
20A
X
-12V
0A
0.8A
X
+5Vsb
0A
2A
2.5A
1. Maximum continuous total DC output power should not exceed 400 W
2. Maximum continuous combined load on +3.3 VDC and +5 VDC outputs should not exceed 130 W
3. Maximum continuous combined load on +12V1 and +12V2 outputs should not exceed 29A(348W)
4. Maximum peak total DC output power should not exceed 440 W
5. Peak power and current loading should be supported for a minimum of 1 second
6. +12V1 & +12V2 have separate current limit circuits to meet 240VA safety requirements.
Model: SS-400H2U Active PFC
Full Range Revision: 1.1
PRODUCT SPECIFICATION
File: EA-400H2U-02
Date: Feb., 16, 2005
SWITCHING POWER SUPPLY
Page: 3 of 3
SEA SONIC ELECTRONICS CO., Ltd.
Tel:+886-2-26590338
Fax:+886-2-26590530
3.2 CROSS REGULATION
The +5V & +3.3V combined load and +12VDC load shall remain within the regulation
Defined in section 3.1 over cross load combinations shown as following figure:
+12V1&+12V2 Power(watts)
0
+5V&+3.3V Power(watts)
50
100
150
200
250
300
350
400
140
120
100
80
60
40
20
3.3 OUTPUT RIPPLE and NOISE
Measurement is made with an oscilloscope with 20 MHz bandwidth. Output should be bypassed
at the connector with a 0.1uF ceramic disk capacitor and a 10uF electrolytic capacitor to
simulate system load. The length of ground wire on probe should not longer than 40mm, if a
Non - differential type of scope was used.
+3.3V
+5V
+12V
-12V
+5Vsb
50Mv
50mV
120mV
120mV
50 mV
3.4 DYNAMIC DC OUTPUT CHARACTERISTICS
+/-10% Max. (tested with capacitors added at output) Excursion for 30% max. load
change with return to regulation in 0.5 mS.
3.5 DC OUTPUT ON/OFF CONTROL
A low active PS-ON (DC ON/OFF) input signal is equipped, which provide the interface to
ENABLE or to DISABLE the GROUP1 of DC output. This signal is electrically compatible
to interface with TTL,OPEN COLLECTOR and the HARD SWITCH.
SIGNAL NAME
MAXIMUM MINIMUM
T2 +5V TURN-ON DELAY
20 mS
T3 RESET TIME
500 mS
100 mS
T4 DC SAVE TIME
1 mS
T2
4.75V
T5
T6
Vpg
Vin(AC)
+5Vsb
+5V
T2
T4
T3
T3
4.75V
Vpg
POK(PG)
DC ON/OFF Model: SS-400H2U Active PFC
Full Range Revision: 1.1
PRODUCT SPECIFICATION
File: EA-400H2U-02
Date: Feb., 16, 2005
SWITCHING POWER SUPPLY
Page: 4 of 4
SEA SONIC ELECTRONICS CO., Ltd.
Tel:+886-2-26590338
Fax:+886-2-26590530
T5 SAVE TIME
Vpg= 4.75V
1 mS
T6 HOLD-ON TIME (AT NOMINAL AC INPUT)
16 mS
4. OUTPUT PROTECTION
4.1 TOTAL POWER PROTECTION: ( OPP )
Total power 135% max with shut-down and latch off protection.
4.2 OVER VOLTAGE PROTECTION: ( OVP )
OVER
ACTIVE RANGE
VOLTAGEAT
Min.
Max.
RESULT
+3.3V
3.76V
4.3V
Shut down & Latch OFF
+5V
5.74V
7.0V
+12V
13.4V
15.6V
The Group 1 DC Output
4.3 SHORT CIRCUIT PROTECTION: ( SCP )
The short between any output of group 1 will shut down all group1.
The short at group 2 will Shut down both group 1 and group 2.
4.4 RESET AFTER SHUTDOWN
Whenever the power supply latches into shutdown state due to fault condition on its output,
The power supply will return to normal operation only after the fault has been removed and
the power switch has been cycled off/on with A MINIMUM OFF TIME OF 20mS. (PS-ON)

5. POWER GOOD SIGNAL:
Signal Type: open collector +5DC, TTL compatible.
Logic Level: <0.4V while sinking 4 mA.
Logic Level High: between 2.4VDC and +5V output while souring 200 uA.
6. EFFICIENCY:
6.1 AT FULL LOAD:
Over 70% at normal input voltage.
0.75 at AC 110v 60Hz(typical)
0.78 at AC 220v 50Hz(typical)
6.2
ENERGY STAR MODE
Over 50% at 30W max power consumption with 15W or more delivered to DC power output
6.3
STANDBY MODE
During measurement of the STANDBY MODE condition, the main converter is off
(PS_ON=High). +5Vsb converter is working and standby input power is measured.
true RMS input power (standby)
+5Vsb/ 0.5A; input voltage: 230VAC 50HZ
< 5W
true RMS input power (standby)
+5Vsb/ 0A; input voltage: 230VAC 50HZ
< 1.5W Model: SS-400H2U Active PFC
Full Range Revision: 1.1
PRODUCT SPECIFICATION
File: EA-400H2U-02
Date: Feb., 16, 2005
SWITCHING POWER SUPPLY
Page: 5 of 5
SEA SONIC ELECTRONICS CO., Ltd.
Tel:+886-2-26590338
Fax:+886-2-26590530
7. COOLING OF PSU
A DC FAN was equipped to Cooling The Power Supply and system Load , The FAN will draw in
AIR Through The vent Holes in DC Output Cable Side , and Exhaust it in The AC Receptacle Side.
Fan parameters

Rated Voltage
12VDC
Dimension
60*60*38(mm)
Air flow
>36.7CFM
Noise
<38db(A)
8.
ACTIVE POWER FACTOR CORRECTION (PFC):
8.1 Harmonic current meets IEC1000-3-2 / EN61000-3-2 standards.
8.2 PFC >0.95 at full load.
0.99 at AC 110v 60Hz(typical)
0.98 at AC 220v 50Hz(typical)
9. ENVIRONMENT
9.1 OPERATING
Temperature: 0 to 50
o
C. (The rated power will derate from 100% to 80% from 40
o
C to 50
o
C
Linearly)
Relative Humidity: 20% to 80%
9.2 SHIPPING / STORAGE
Temperature: -40 to 85 Deg C
Relative Humidity: 10% to 95%
10. MTBF
Over 100,000 hours at 25 Deg C. excluding the DC Fan.
11. EMC
Comply to EN61204-3:2000, & FCC Part 15 & Part 2 (CISPR 22 CLASS B)
GB9254-1998GB17625.1-2003 standards
12. SAFETY:
Conform to IEC60950-1:2000EN60950-1:2001UL60950-1 1st GB4943-2001
standards CB, TUV,NODIC,CUL (LEVEL 3),CCC
Model: SS-400H2U Active PFC
Full Range Revision: 1.1
PRODUCT SPECIFICATION
File: EA-400H2U-02
Date: Feb., 16, 2005
SWITCHING POWER SUPPLY
Page: 6 of 6
SEA SONIC ELECTRONICS CO., Ltd.
Tel:+886-2-26590338
Fax:+886-2-26590530
13. MECHANICAL DRAWING:
Dimension: H70 x W100 x L215 mm