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DATA SHEET
1
ORDERING INFORMATION
PFE
Product Family
PFE Front-Ends
1100
Power Level
1100 W
-
Dash
12
V1 Output
12 V
-
Dash
054
Width
54 mm
x
Airflow
N: Normal
A
Input
A: AC
R: Reversed
2
OVERVIEW
The PFE1100-12-054xA AC/DC power supply is a fully DSP controlled, highly efficient front-end power supply. It incorpo-
rates resonance-soft-switching technology and interleaved power trains to reduce component stresses, providing increased
system reliability and very high efficiency. With a wide input operational voltage range and minimal linear derating of output
power with input voltage and temperature, the PFE1100-12-054xA maximizes power availability in demanding server, net-
work, and other high availability applications. The supply is fan cooled and ideally suited for integration with a matching air-
flow paths.
The PFC stage is digitally controlled using a state-of-the-art digital signal processing algorithm to guarantee best efficiency
and unity power factor over a wide operating range.
The DC/DC stage uses soft switching resonant techniques in conjunction with synchronous rectification. An active OR-ing
device on the output ensures no reverse load current and renders the supply ideally suited for operation in redundant power
systems.
The always-on standby output, with selectable voltage level (3.3/5.0 Volts), provides power to external power distribution and
management controllers. It is protected with an active OR-ing device for maximum reliability.
Status information is provided with front-panel LEDs. In addition, the power supply can be controlled and the fan speed set
via the I 2 C bus. The I 2 C bus allows full monitoring of the supply, including input and output voltage, current, power, and inside
temperatures.
Cooling is managed by a fan controlled by the DSP controller. The fan speed is adjusted automatically depending on the
actual power demand and supply temperature and can be overridden through the I 2 C bus.
Figure 1 - PFE1100-12-054xA Block Diagram
L
DC
V1
Vsb
Filter
PFC
Buck
VsbSense+
VsbSense-
DC
N
GND
PE
Aux
Converter
FAN
EEPROM
V1Sense+
Digital
Digital
V1Sense-
Prim
Controls
Communication Bus
Sec
Controls
I2C
APS
Logic Signals
3
ABSOLUTE MAXIMUM RATINGS
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-term reliabil-
ity, and cause permanent damage to the supply.
PARAMETER
Vi maxc
Maximum Input
DESCRIPTION / CONDITION
Continuous
MIN
NOM
MAX
264
UNIT
VAC
PFE1100-12-054xA
2
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