The PET800-12-074 is an 800 Watts, 1 U form factor power supply
module with Active PFC (Power Factor Correction) and PMBus®
(Power Management Bus). It converts standard AC mains power into
a main output of 12 V for powering intermediate bus architectures
(IBA) in high performance and reliability servers, routers, and network
switches.
The PET800-12-074 meets international safety standards and
displays the CE-Mark for the European Low Voltage Directive (LVD).
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Best-in-Class, 80 PLUS
Certified “Platinum” Efficiency
Wide Input Voltage Range 90-264 VAC
AC Input with Power Factor Correction
Always-On 24 W Standby Output (12 V/2 A)
Hot-Plug Capable
Parallel Operation with Active Digital Current Sharing
DC-DC Digital Controls for Improved Performance
High Density Design 25 W/in3
Small Form Factor 73.5 x 39.0 x 185 mm
PMBus® for Control, Programming and Monitoring
Over Temperature, Output Over Voltage and Over Current Protection
One DC OK Signaling Status LED
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High Performance Servers
Routers
Network Switches
Disclaimer: PMBus is a registered trademark of SMIF, Inc.
2
PET800-12-074 Series
PET
Product Family
PET
800
-
12
V1 Output
12 V
-
Dash
074
Width
74 mm
x
Airflow
N: Normal
R: Reversed
A
Input
A: AC
Power Level Dash
800 W
The PET800-12-074 AC-DC power supply is a mainly DSP controlled, highly efficient front-end. It incorporates resonance-soft-
switching technology and interleaved power trains to reduce component stresses, providing increased system reliability and very
high efficiency. With a wide input operating voltage range, the PET800-12-074 maximizes power availability in demanding server,
network switch, and router applications.
The front-end is fan cooled and ideally suited for server integration with a matching airflow path. The PFC stage is controlled using
interleaved Critical mode to guarantee best efficiency and unity power factor over a wide operating range.
The DC-DC stage uses soft switching resonant technology 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, 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 LED. In addition, the power supply can be controlled and the fan speed set via the
I2C bus. It 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 I2C bus.
Figure 1. PET800-12-074 Block Diagram
tech.support@psbel.com
PET800-12-074 Series
General Condition: TA = 0… 50 °C unless otherwise noted.
PARAMETER
V
i nom
V
i
I
i max
I
i p
Ii
F
i
PF
V
i on
V
i off
Input Voltage Ranges
High line
Input Voltage Ranges
Max Input Current
Inrush Current Limitation
(Cold start)
Input current
180-264 VAC
Input Frequency
Power Factor
Turn-on Input Voltage
Turn-off Input Voltage
Vi nom, 50 Hz, I1 nom
Brown in
Brown out
47
0.93
80
75
85
80
92
94.2
93
16
90
85
50/60
6
63
1
3
DESCRIPTION / CONDITION
Low line
MIN
90
180
90
NOM
115
230
MAX
132
264
264
12
UNIT
VAC
VAC
VAC
A
rms
A
p
A
rms
A
rms
Hz
W/VA
VAC
VAC
Normal operating (
V
i min
to
V
i max
)
V
i min
to
V
i max
, 90°(Phase),
T
NTC
= 25 °C
90-132 VAC
50
12
V
i nom
, 0.2∙
I
x nom
,
V
x nom
,
T
A
= 25 °C
η
Efficiency without Fan
V
i nom
, 0.5∙
I
x nom
,
V
x nom
,
T
A
= 25 °C
V
i nom
,
I
x nom
,
V
x nom
,
T
A
= 25 °C
%
T
hold
Hold-up Time
After last AC zero point
ms
The power supply module efficiency should meet at least 80Plus Platinum rating, the efficiency should be measured at 230
VAC and with external fan power according to 80Plus efficiency measurement specifications.
95
94
93
92
91
90
89
88
0
200
Vin=230Vac, (Fan External)
Platnium
400
Po (W)
600
800
Efficiency (%)
1
Figure 2. Efficiency vs. Load Current (Ratio Metric Loading)
The charging currents for X capacitors are not considered as in-rush current
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00505_AE
© 2018 Bel Power Solutions & Protection
4
PET800-12-074 Series
1.00
0.95
Power Factor
0.90
0.85
Vin=115Vac
0.00
200.00
400.00
Po (W)
600.00
800.00
0.80
Figure 3. Power factor vs. Load current
General Condition: Ta = 0 … +50
°C unless otherwise noted.
PARAMETER
Main Output V
1
V
1 nom
V
1 set
dV
SB tot
P
1 nom
I
1 nom
v
1 pp
dI
share
VI
share
dV
dyn
T
rec
C
V1 Load
V
SB nom
V
SB set
dV
SB tot
P
SB nom
I
SB nom
V
SB pp
dV
SBdyn
T
rec
C
VSB load
Nominal Output Voltage
Output Setpoint Accuracy
Total Regulation
Nominal Output Power
Nominal Output Current
2
Output Ripple Voltage
3
Current Sharing
Dynamic Load Regulation
Recovery Time
Capacitive Loading
Nominal Output Voltage
Output Setpoint Accuracy
Total Regulation
Nominal Output Power
Nominal Output Current
Output Ripple Voltage
Recovery Time
Capacitive Loading for
V
SB
3
DESCRIPTION / CONDITION
MIN
NOM
12.0
MAX
UNIT
VDC
0.5
∙
I
1 nom
,
T
amb
= 25 °C
-0.5
-5
780
65
59.6
+0.5
+5
%
V
1 nom
%
V
SBnom
W
ADC
V
i min
to
V
i max
,
0 to 100%
I
SB nom
, T
a min
to
T
a max
V
1
= 12V
Input voltage 100-264 VAC
Input voltage 900-100 VAC
V
1 nom
,
I
1 nom
, 20 MHz BW (See Section 4.1)
Deviation from
I
1 tot
/ N,
I
1
> 10%
-6.5
6.0
-5
120
+6.5
+5
2
1,1000
12.0
-1
-5
24
2
+1
+5
mVpp
ADC
VDC
%
V
1 nom
ms
μF
VDC
%
V
1nom
%
V
SBnom
W
ADC
V
1 nom
,
I
1
=65A
ΔI1
= 60% I1 nom, I1 = 5 … 100% I1 nom,
dI1/dt = 0.5 A/μs, recovery within 1% of V1 nom
T
a
= 25 °C
Standby Output V
SB
0.5
∙
I
SB nom
,
T
amb
= 25 °C
V
i min
to
V
i max
,
0 to 100%
I
SB nom
, T
a min
to
T
a max
V
SB nom
,
I
SB nom
, 20 MHz BW
ΔI
SB
= 25% I
SB
nom, I
SB
= 5 … 100% I
SB
nom,
dI
SB
/dt = 0.5 A/μS, recovery within 1% of V
SB
nom
-5
120
+5
250
350
mVpp
%
V
SBnom
μs
μF
Dynamic Load Regulation
T
amb
= 25 °C
2
The output noise and ripple measurement was made with 20 MHz bandwidth using a 6 inch twisted pair, terminated with a
10 uF tantalum capacitor in parallel with a 0.1 uF ceramic capacitor. The output ripple voltage on VSB is influenced by the main output V1.
Evaluating VSB output ripple must be done when maximum load is applied to V1.
3
The output power derating at low line only for PET800-12-050NA, for RA model no derating required
tech.support@psbel.com
PET800-12-074 Series
5
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 1.0 mΩ. This path may be used to carry DC-current.
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.
PARAMETER
F
V
1 OV
V
1 UV
I
V1 lim
I
V1 SC
V
SB OV
I
SB lim
T
SD
Over Temperature Oring
Input Fuse (Line)
OV Threshold
V
1
UV Threshold
V
1
Current Limit
V
1
Max Short Circuit Current
V
1
OV Threshold
V
SB
Current Limit
V
SB
Over Temperature on Inlet
DESCRIPTION / CONDITION
Not user accessible, quick-acting (F)
Refer to section 5.1
unlatch unit by disconnecting AC or by toggling the
PS_ON signal
Refer to section 5.3
V1 < 3 V (unlatch unit by disconnecting AC or by
toggling the PS_ON signal)
unlatch unit by disconnecting AC
Hiccup mode
Automatic recovery with Hysteresis_for NA model
Automatic recovery with Hysteresis_for NA model
Automatic recovery with Hysteresis_ for RA model
Automatic recovery with Hysteresis_ for RA model
MIN
NOM
12.5
MAX
UNIT
A
rms
13.3
10.5
71.5
250
13.3
3.5
70
100
60
105
14.5
VDC
VDC
97.5
ADC
ADC
14.5
4.5
VDC
ADC
°C
°C
°C
°C
T
SD
Over Temperature on Inlet
Over Temperature Oring
The PET front-ends provide a fixed threshold over voltage protection implemented with a HW comparator. Once an over voltage
condition has been triggered, the power supply will shut down and latch the fault condition. The latch can be unlatched by
disconnecting the supply from the AC mains or by toggling the PS_ON input.
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00505_AE
© 2018 Bel Power Solutions & Protection
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