SFP1050-12BG AC-DC Front-End Data Sheet
12V Output, 1050 Watts
Features
Ideal server form factor optimizes,
space, efficiency, and load variations
High efficiency maximized between
30-80% load conditions
Unconditionally stable under any load
condition
Wide input voltage range (90-264
VAC)
with PFC
1U or 2U height configurations
Active current share with ORing FET
Incorporate Remote sense
I
2
C interface status monitoring
Primary and secondary voltage and
current monitor over I
2
C
Standby voltage of 3.3 VDC @ 3 A
Overtemperature, overload, and
overvoltage protection
Status LEDs: AC OK, POWER
GOOD, PS FAIL
Applications
Datacom
Distributed power systems
Description
The SFP1050-12BG is a 1050-watt, power factor corrected (PFC) front-end which provides a 12 VDC output for
datacom and other distributed power applications. Its compact size enables mounting in both 1U and 2U height
racks. High efficiencies, advanced thermal management techniques, and an internal fan increase reliability over a
broad range of operating conditions. Internal ORing FETs facilitate use in hot-swap (plug)
1
, redundant
configurations. Status is provided with front panel LEDs, logic signals, and via the I
2
C management interface bus.
The SFP1050-12BG meets international safety requirements and is CE marked to the Low Voltage Directive (LVD).
Model Selection
Model
Nominal
Output
Voltage
(VDC)
12
3.3 (Standby)
Adjustment
Range (VDC)
Maximum Output
Current (Amps)
Regulation
%
Ripple &
Noise @
20 MHz
BW
(mV)
100
100
SFP1050-12BG
N/A
N/A
86.7
3
±3
±3
Proper hot-swap (plug) operation instruction: Power supply is not intended to be inserted into the system with AC
cord already applied. Alternatively, if there is an application where power supply insertion with AC cord is required;
PS_ON must be toggled or AC recycled after insertion into the system to reset the power supply.
1
BCD20031 Rev. AA, 22-Apr-09
Page 1 of 8
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SFP1050-12BG AC-DC Front-End Data Sheet
12V Output, 1050 Watts
Input Specifications
Parameter
AC Input Voltage
Input Frequency
Hold-up Time
Input Current
Inrush Surge Current
Power Factor
Conditions/Description
Single-phase continuous input range.
AC input.
After last AC line peak at full power. At 115 VAC.
At full-rated load.
At 90 VAC.
Min.
90
47
20
15
25
> 0.95
Nom.
Max.
264
63
Units
VAC
Hz
ms
A rms
A pk
W/VA
Excluding Xcap. Vin = 264 VAC. 25 ºC
Per EN61000-3-2
Output Specifications
Parameter
Efficiency
NOTE:
Internal fan is
considered part of the
load as it is driven from
the 12V output; Vaux load
is set to 0.5A for
efficiency measurements.
Conditions/Description
With Vin at 110VAC and 50% to 75% load on
V1.
With Vin at 110VAC and 75% to 100% load on
V1.
With Vin at 220VAC and 50% to 75% load on
V1.
With Vin at 220VAC and 75% to 100% load on
V1.
Min.
87.0
85.0
88.0
89.0
0
Nom.
Max.
Units
%
%
%
%
A
Minimum Load
Output Power
Overshoot
Transient Response
Minimum loading required to maintain
regulation.
1050
Output voltage overshoot at turn-on. Overshoot
lasts <5 ms.
Maximum recovery time to within 1% of initial
set point due to a 25% load change, 1A/µs.
12V output:
Standby output:
Maximum deviation:
12V output:
Standby output:
<5
W
%
5
5
3
3
1500
ms
ms
%
%
ms
Turn-On Delay
with PS_ON signal
Output Regulation
Time required for initial output voltage
stabilization after application of AC input or
ON/OFF signal.
See Model Selection data on page 1.
BCD20031 Rev. AA, 22-Apr-09
Page 2 of 8
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SFP1050-12BG AC-DC Front-End Data Sheet
12V Output, 1050 Watts
Interface Signals and Internal Protection
1
Parameter
Overvoltage Protection
Overcurrent Protection
Short-Circuit
Protection
Overtemperature/
Fan Failure Warning
Conditions/Description
Latch-style overvoltage protection. 12V output:
Standby output:
Current limit (Latching Mode).
Latching Mode.
12V output will shut down in the event of an
overtemperature condition or blocked fan rotor.
OT setpoint is 55 ±3 ºC. Supply's fan and Vaux
are active. Power supply will recover when OT
condition is removed. Amber OT LED will turn
ON to indicate fault condition.
Output enable. Pulled low allows V1 to be activated.
0 to 8V signal used for active current sharing.
For factory use only.
I
2
C Addresses.
I
2
C Data line (3.3V).
I
2
C Clock line (3.3V).
Two pulses per fan revolution.
High signal indicates AC is within PSU limits.
100 Ohm resistor internally connected to RTN allowing the PSU to be detected on insertion.
Low signal indicates PSU fan is running below speed or an overtemperature limit was exceeded.
High signal indicates both outputs are within regulation limits.
12V output:
Standby output:
91
3.2
Min.
Nom.
Max.
15
4.3
112.7
6
Units
V
A
PS_ON
+12V Current Share
Write Protect
PS A0, PS A1
SDA
SCL
Tach_1
AC_OK/H
Present/L
Alert/L
PWROK/H
1
Refer to product specification for internal pull up impedances and timing of these signals.
BCD20031 Rev. AA, 22-Apr-09
Page 3 of 8
www.power-one.com
SFP1050-12BG AC-DC Front-End Data Sheet
12V Output, 1050 Watts
I
2
C Bus Management Interface
1
Static
Status
(Logic 1 or 0)
Includes static information such as: part number and revision level, output rating, serial number,
date code, and manufacturing location.
AC Input OK.
DC Output OK.
Overtemperature.
Overcurrent.
Fan OK.
Overvoltage Alert
Undervoltage Alert
Output voltage (main output). LSB = 20 mV
Output current (main output). LSB = 100 mA
Real-Time Monitoring
1
Reference "I C Management Interface" and "EEPROM Table of Contents" documents for SFP1050-12G (consult factory).
2
Safety, Regulatory, and EMC Specifications
Parameter
Agency Approvals
Electromagnetic
Interference
Harmonics
Voltage Fluctuation
and Flicker
ESD Susceptibility
Radiated
Susceptibility
EFT/Burst
Input Transient
Protection
RF Conducted
Disturbances
Voltage Interruptions
Conditions/Description
Min.
Nom.
Max.
Units
UL 60950, (UL) CSA 60950 (cUL), EN 60950 (TÜV), CE Mark for LVD.
FCC CFR title 47 Part 15
Sub-Part B,
EN 55022/CISPR 22.
Per IEC 61000-3-2.
Per IEC 61000-3-3.
Per EN 61000-4-2, Level 4.,
Performance criteria A
Per EN 61000-4-3, Level 3.,
Performance criteria A
Per EN 61000-4-4, Level 4.,
Performance criteria A
Per EN 61000-4-5, Class 4.,
Performance criteria A
Per EN 61000-4-6, Level 2.,
Performance criteria A
Per EN 61000-4-11, performance criterion B 30%.
Per EN 61000-4-11, performance criterion C 60%.
Per EN 61000-4-11, performance criterion C 95%.
Per EN 60950, 264 VAC @ 60Hz:
Line-to-Line:
Line-to-Ground:
Contact Discharge:
Air Discharge:
Conducted:
Radiated:
A
A
A
Pass
±8
±15
10
±4
2
4
3
10
100
5
.
.
.
.
.
.
kV
V/m
kV
kV
V
ms
ms
Sec
mA
Class
Class
Leakage Current
1.75
BCD20031 Rev. AA, 22-Apr-09
Page 4 of 8
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SFP1050-12BG AC-DC Front-End Data Sheet
12V Output, 1050 Watts
Environmental Specifications
Parameter
Altitude
Operating
Temperature
Storage Temperature
Temperature
Coefficient
Relative Humidity
Shock
0 ºC to 45 ºC (after 15-minute warm-up).
Non-condensing.@ 40
C
Operating: half-sine, 11 ms, 10 shock per face,
6 faces
Non-Operating: half-sine, 11 ms, 10 shock per
face, 6 faces
Operating: 3 axis swept sine 5-500 Hz,
1 octave/min, 5 sweep cycles per axis
Non-operating: random 10-500 Hz.
5
Conditions/Description
Operating.
Non-Operating.
Internal DC fan for cooling.
At 100% load:
0
-40
Min.
Nom.
Max.
10K
40K
50
85
0.02
93
7
30
1
3.5
Units
ASL ft
ASL ft
ºC
ºC
%/ºC
%RH
G
G
G
Grms
Vibration
Reliability
Parameter
MTBF
Conditions/Description
(Calculated) Bellcore Ground Benign @ 25
C.
Demonstrated
Min.
100 000
300 000
Nom.
Max.
Units
hrs
hrs
LED Indicators
Indicatorr
POWER GOOD
AC OK
PS FAIL
GREEN
GREEN
AMBER
LED Color
BCD20031 Rev. AA, 22-Apr-09
Page 5 of 8
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