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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
Conditions/Description
Latch-style overvoltage protection. 12V output:
Min.
Nom.
Max.
15
Units
V
Standby output:
4.3
Overcurrent Protection
Current limit (Latching Mode).
12V output:
91
112.7
A
Short-Circuit
Protection
Overtemperature/
Fan Failure Warning
Standby output:
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.
3.2
6
PS_ON
+12V Current Share
Write Protect
PS A0, PS A1
SDA
SCL
Tach_1
AC_OK/H
Present/L
Alert/L
PWROK/H
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.
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
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