DATA SHEET
PET800-12-074NA
Best-in-class, 80 PLUS certified “Platinum” efficiency
750W INTEL CRPS (Common Redundant Power Supply)
compatible
Wide input voltage range: 90-264 VAC
AC input with power factor correction
Always-On 24 W standby output (12V/2A)
Hot-plug capable
Parallel operation with active digital current sharing
Full digital controls for improved performance
High density design: 25 W/in3
Small form factor: 73.5 x 39.0 x 185 mm
I
2
C communication interface for control, programming
and monitoring with PMBus™ protocol
Overtemperature, output overvoltage and overcurrent
protection
One DC OK with fault signalling status LED
FEATURES
DESCRIPTION
The
PET800-12-074NA
is an 800W AC-DC switching redundant power supply. The power supply shall
be able to operate as a single supply, or in a 1+1 parallel hot-plug able operation with active load sharing
in a 1+1 redundant configuration.
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DATA SHEET
1
ORDERING INFORMATION
PET
Product Family
PET
800
Power Level
800W
-
Dash
12
V1 Output
12 V
-
Dash
074
Width
74 mm
N
Airflow
N: Normal
R: Reversed
A
Input
A: AC
2
INPUT FEATURES
PARAMETER
V
i
I
i
I
i p
F
i
Input Voltage Ranges
Input Current
Inrush Current
Input Frequency
Leakage current to ground
2.1 GENERAL
DESCRIPTION / CONDITION
Low line
High line
90-132VAC
180-264VAC
V
i min
to
V
i max
, 90,
T
NTC
= 25 ° C
47
50/60
MIN
90
180
NOM
115
230
MAX
132
264
12
6
50@264VAC
63
3.5@240VAC
UNIT
V
rms
V
rms
A
A
A
p
Hz
mA
2.2 AC LINE FUSE
The power supply shall incorporate one input fuse on the line side for input over-current protection to prevent damage to the
power supply and meet product safety requirements. AC inrush current shall not cause the AC line fuse to blow under any
conditions. All protection circuits in the power supply shall not cause the AC fuse to blow unless a component in the power
supply has failed. This includes DC output load short conditions.
2.3 INPUT POWER FACTOR CORRECTION
The input Power Factor shall be greater than 0.98/115Vac and 0.93/230Vac. (Refer to Table-1)
Table 1 – Power Factor Correction
INPUT VOLTAGE
115VAC/60Hz
230VAC/50Hz
BELOW 10% LOADING
>0.8
>0.75
BELOW 50% LOADING
>0.9
>0.9
100% LOADING
0.98
0.93
2.4 AC LINE DROPOUT
An AC line dropout is a transient condition defined as the AC input to the power supply drops to 0 VAC at any phase of the
AC line for any length of time. During an AC dropout the power supply must meet dynamic voltage regulations requirements.
An AC line dropout of any duration shall not cause dripping of the control signals and protection circuits.
If the AC dropout lasts longer than the holdup time, the power supply should recover when VAC meets 88VACand meet all
turn on requirements.
An Input dropout of any length shall not cause any damage to the power supply.
Table 2– Hold-up time until Power output goes out of regulations
LOADING
50%
80%
100%
MAIN OUTPUT
24mS
20mS
16mS
STANDBY OUTPUT
70mS
2.5 EFFICIENCY
The redundant power supply module efficiency should meet at least Climate Saver 3 / 80Plus Platinum rating. The efficiency
should be measured at 230VAC and with external fan power according to Climate Saver /80Plus efficiency measurement
specifications (CSCI-09-10).
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DATA SHEET
Table 3 – Module efficiency requirements
PARAMETER
Efficiency Std.
Platinum
20% Load
90%
DESCRIPTION
50% Load
94%
100% Load
91%
2.6 AC LINE TRANSIENT SPECIFICATION
AC line transient conditions shall be defined as “sag” and “surge” conditions.
“Sag” conditions are also commonly referred to as “brownout”; these conditions will be defined as the AC line voltage
dropping below nominal voltage conditions.
“Surge” will be defined to refer to conditions when the AC line voltage rises above nominal voltage.
The power supply shall meet the requirements under the following AC line sag and surge conditions.
Table 4: AC Line Sag Transient Performance (10sec interval between each sagging)
DURATION
Continuous
0 to 1 AC cycle
> 1 AC cycle
0 to 1/2 AC cycle
SAG
10%
100%
> 10%
30%
OPERATING AC VOLTAGE
Nominal AC voltage
Nominal AC voltage
Nominal AC voltage
Mid-point of nominal AC voltage
LINE FREQUENCY
50/60 Hz
50/60 Hz
50/60 Hz
50/60 Hz
PERFORMANCE CRITERI
No loss of function or performance
Loss of function or performance is
acceptable, self recoverable
Loss of function acceptable, self
recoverable
No loss of function or performance
Table 5: AC Line Surge Transient Performance
DURATION
Continuous
0 - ½ AC cycle
SURGE
10%
30%
OPERATING AC VOLTAGE
Nominal AC voltage
Mid-point of Nominal AC Voltage
LINE FREQUENCY
50/60 Hz
50/60 Hz
PERFORMANCE CRITERI
No loss of function or performance
No loss of function or performance
2.7 POWER RECOVERY
The power supply shall recover automatically (auto recover) after an AC power failure. AC power failure is defined to be any
loss of AC power that exceeds the dropout criteria.
2.8 VOLTAGE BROWN OUT
The power supply shall comply with the limits defined in EN55024:1998 using the IEC 61000-4-11:1995 test standard and
performance criteria C defined in Annex B of CISPR 24.
In addition the power supply shall meet the following requirements:
A continuous input voltage below the nominal input range shall not damage the power supply or cause overstress to any
power supply component. The power supply must be able to return to normal power up state after a brownout (Sag)
condition. During brownout test from 120VAC to 0VAC @ 800W with 3mins ramp, input current shall never exceed fuse and
shall not blow the fuse.
3
3.1
OUTPUT FEATURES
GROUNDING
The output ground of the pins of the power supply provides the output power return path. The ground output at the PCB card
edge shall be connected to the safety ground (power supply enclosure). This grounding should be well designed to ensure
passing the max allowed Common Mode Noise levels.
The power supply shall be provided with a reliable protective earth ground. All secondary circuits shall be connected to
protective earth ground. Resistance of the ground returns to chassis shall not exceed 1.0mΩ. This path may be used to carry
DC-current.
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DATA SHEET
3.2
OUTPUT RATING
The following table defines the power and current rating of the 800W power supply. The combined output power of all
outputs shall not exceed the rated output power. The power supply must meet both static and dynamic voltage regulation
requirements.
Table 6 – Output Power and Current Ratings
OUTPUT
+12V
+12Vsb
MINIMUM CURRENT(A)
0.5
0
MAXIMUM CURRENT(A)
65
2
OUTPUT POWER(W)
780
24
800
3.3
3.4
AUXILARY OUTPUT (STANDBY)
NO LOAD OPERATION
The 12VSB output shall be present when an AC input greater than 88V
AC
is applied.
The power supply shall meet all requirements except for the transient loading requirements when operated at no load on all
outputs.
3.5
VOLTAGE REGULATION
The power supply shall meet the Voltage regulation under all operating conditions (AC line, transient loading, output loading).
These limits include the peak-peak ripple/noise. The regulation of Table 7 shall be measured at the output connector of the
power supply, subject to the dynamic loading conditions in paragraph 4.7.
Table 7 – Output Voltage regulation
OUTPUT
+12V
+12VSB
MINIMUM
11.4
11.4
NOMINAL
12.0
12.0
MAXIMUM
12.6
12.6
UNIT
Vdc
Vdc
3.6
RIPPLE AND NOISE REGULATION
Ripple and Noise is defined in table 10. Ripple and Noise shall be measured over a Bandwidth of 0Hz to 20MHz at the power
supply output connector. A 0.1μF ceramic capacitor and 47μF of tantalum capacitor shall be placed at each point of
measurement. The measurement points shall be as close as possible to the point of load.
The ripple and noise specification shall be met over all load ranges and AC line voltages with 1+1 power supplies in parallel
operation.
Table 8– Ripple and Noise Regulation
OUTPUT
+12V
+12VSB
MAXIMUM
120
120
UNIT
mV
mV
3.7
DYNAMIC LOADING
The power supply shall operate within specified limits and meet regulation requirements for step loading and capacitive
loading specified below.
The load transient repetition rate shall be tested between 50Hz to 5kHz at duty cycles ranging. The load transient repetition
rate is only a test specification. The Δ step load may occur anywhere within the MIN load and the MAX load.
This shall be tested with no additional bulk capacitance added to the load.
Table 9 – Transient Load Requirements
OUTPUT
+12V
+12VSB
Δ STEP SIZE
60% OF MAX.
25% OF MAX.
SLEW RATE
0.5A/μs
0.5A/μs
CAPACITIVE LOAD
4700μF
100μF
Note: For dynamic conditions +12V min. loading is 1A.
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DATA SHEET
3.8
CAPACITIVE LOAD
Table 10 – Capacitive Loading Conditions
The power supply shall operate within specifications over the capacitive loading ranges defined below in Table-10.
OUTPUT
+12V
+12VSB
MIN
10μF
1μF
MAX
11,000μF
350μF
3.9
MAXIMUM LOAD CHANGE
The power supply shall continue to operate normally when there is a step change ≤ 1 A/μ sec. between minimum load and
maximum load.
3.10 CLOSE LOOP STABILITY
The power supply shall be unconditionally stable under all line/load/transient load conditions including capacitive load ranges.
A minimum of: 45 degrees phase margin and -10dB-gain margin is required.
Closed-loop stability must be ensured at the maximum and minimum loads as applicable.
3.11 RESIDUAL VOLTAGE IMMUNITY IN STANDBY MODE
The power supply should be immune to any residual voltage placed on its outputs (typically a leakage voltage through the
system from standby output) up to 500mV. There shall be no additional heat generated or stressing of any internal
components with this voltage applied to any individual or all outputs simultaneously. It also should not trip the protection
circuits during turn on/off. The residual voltage at the power supply outputs for no load condition shall not exceed 100mV
when AC voltage is applied.
3.12 SOFT STARTING
The power supply shall contain control circuit which provides monotonic soft start for its outputs without overstress of the AC
line or any power supply components at any specified AC line or load condition.
3.13 HOT SWAP REQUIREMENTS
Hot Swapping a power supply is the process of inserting and extracting a power supply from an operating power system.
During this process the output voltages shall remain within the limits with the capacitive load specified. The hot swap test
must be conducted when the system is operating under static, dynamic and zero loading conditions. The power supply can
be hot swapped by the following method:
Extraction:
The power supply may be removed from the system while operating with PSON# asserted, while
in standby mode with PSON# de-asserted or with no AC applied. No connector damage should occur during
un-mating of the power supply from the power distribution board (PDB).
Insertion:
The power supply may be inserted into the system with PSON# asserted, with PSON# de-
asserted or with no AC power present for that supply. No connector damage should occur due to the mating
of the output and input connector.
In general a failed (of by internal latch or external control) supply may be removed, then replaced with a good power supply,
however, hot swap needs to work with operational as well as failed power supplies. The newly inserted power supply will get
turned on into standby or Power On mode once inserted.
3.14 LOAD SHARING CONTROL
All outputs shall be capable of operating in a redundant current share mode. Two power supplies may be operated in parallel.
All outputs shall incorporate an isolation diode for fault isolation. Filter capacitors that are located after the isolation diode
shall be of high reliability and shall be de-rated sufficiently to minimize failures. The +12V current sharing shall be a single
wire type. Connecting the I
SHARE
pins of each power supply together shall enable the current share feature. With the current
share pins tied together, the output load current shall be balanced as defined below. The load share (I
SHARE
) shall be a single
wire type. Connecting I
SHARE
pins of each PCM together shall enable the current share feature. With the current share pins
tied together, the output load current shall be balanced to within 10% of full load (current difference should be less than 6.5
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