The PET2000-12-074xD is a 2000 Watt DC to DC power supply that
converts -40 to -72 VDC voltage into an isolated main output of
+12 VDC for powering intermediate bus architectures (IBA) in high
performance and reliability servers, routers, and network switches.
The PET2000-12-074xD utilizes full digital control architecture for
greater efficiency, control, and functionality.
This power supply meets international safety standards.
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Best-in-class,
“Platinum” efficiency
Wide input voltage range: -40 to -72 VDC
Always-On 12 V / 2.5 A / 30 W standby output
Hot-plug capable
Parallel operation with active current sharing
Full digital controls for improved performance
High density design: 42.1 W/in
3
Small form factor: 73.5 x 40.0 x 265 mm
PMBus® communication interface for control, programming
and monitoring
Status LED with fault signaling
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Networking Switches
Servers & Routers
Telecommunications
Disclaimer: PMBus is a registered trademark of SMIF, Inc.
2
PET2000-12-074xD
2000
Power Level
2000 W
1.
PET
Product Family
PET Front-Ends
-
Dash
12
V1 Output
12 V
-
Dash
074
Width
74 mm
x
Airflow
N: Normal
R: Reverse
D
Input
-
D: DC
x
DC Inlet
-
K
Y
- Black, 6 AWG (C10-747100)*
- Black, 4 AWG (C10-747442)
- Grey, 6 AWG (C10-638974)
* Default option
–
no suffix needed.
Input plug with wire: Amphenol # CR-302001-257
2.
The PET2000-12-074xD DC/DC power supply is a fully DSP controlled, highly efficient front-end power supply. It incorporates state-
of-the art technology and uses an interleaved forward converter topology with active clamp and synchronous rectification to reduce
component stresses, thus providing increased system reliability and very high efficiency.
With a wide input DC voltage range the PET2000-12-074xD maximizes power availability in demanding server, network, and other
high availability applications. The supply is fan cooled and ideally suited for integration with a matching airflow path.
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 a front-panel LED. 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. Block Diagram
tech.support@psbel.com
PET2000-12-074xD
3.
3
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-term reliability and
cause permanent damage to the supply.
PARAMETER
Vi max
Maximum Input Voltage
CONDITIONS / DESCRIPTION
Continuous
MIN
MAX
-72
UNITS
VDC
4.
General Condition: T
A
= 0…40
°C (PET2000-12-074RD), T
A
= 0…55
°C (PET2000-12-074ND), unless otherwise noted.
PARAMETER
Vi start
Vi nom
Vi
Ii
Ii pk
Vi on
Vi on
Vi off
Minimum Operating Input
Voltage
Nominal Input Voltage
Input Voltage
Input Current
Inrush Current Limitation
Turn-On Standby Input
Voltage
Turn-On Input Voltage
Turn-Off Input Voltage
Normal operation (from Vi min to Vi max)
Vi > Vi min
From Vi min to Vi max, T
A
= 25°C, turn on
Ramping up
Ramping up
Ramping down
Vi = -53 VDC; 20% load
η
Efficiency
Vi = -53 VDC; 50% load
Vi = -53 VDC; 100% load
-30
-41
-38.0
93
95
93
5
12
6
18
-42
-39.5
40
55
-40
DESCRIPTION / CONDITION
Stand-by output available, DSP running
MIN
-32
NOM
MAX
UNIT
VDC
-53
-72
VDC
VDC
A
A
VDC
VDC
VDC
%
%
%
ms
ms
Thold_V1
Thold_sb
Hold-Up Time V1
Hold-Up Time Vsb
167 A on I1, 2.5 A on Vsb with 2,200 µF of Load
capacitance
167 A on I1, 2.5 A on Vsb with 2,200 µF of Load
capacitance
4.1 INPUT FUSE
A fast-acting 80 A input fuse in the negative voltage path inside the power supply protect against severe defects.
The fuse is not accessible from the outside and are therefore not serviceable parts.
4.2 INRUSH CURRENT
Internal bulk capacitors will be charged through resistors connected from bulk cap minus pin to the DC rail minus, thus limiting
the inrush current. After the inrush phase, NTC resistors are then shorted with MOSFETs connected in parallel. The Inrush
control is managed by the digital controller (DSP).
4.3 INPUT UNDER-VOLTAGE
If the value of input DC voltage stays below the input under voltage lockout threshold Vi on, the supply will be inhibited.
Once the input voltage returns within the normal operating range, the supply will return to normal operation again. If the input
voltage stays below the input undervoltage lockout threshold Vi on, the supply will be inhibited. Once the input voltage returns
within the normal operating range, the supply will return to normal operation again.
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+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00773.0_AE
© 2018 Bel Power Solutions & Protection
4
PET2000-12-074xD
General Condition: T
A
= 0…40
°C (PET2000-12-074RD), T
A
= 0…55
°C (PET2000-12-074ND), unless otherwise noted.
5.
PARAMETER
Main Output V
1
V
1 nom
V
1 set
dV
1 tot
P
1 nom
I
1 nom
I
1 peak
V
1 pp
dV
1 load
dV
1 line
dV
1 temp
dI
1 share
V
ISHARE
dV
1 lt
t
rec
V
1 dyn
t
V1 on delay
t
V1 rise
t
V1 ovr sh
dV
1 sense
C
V1 load
OVP
V
SB nom
V
SB set
dV
SB tot
P
SB nom
P
SB peak
I
SB nom
I
SB peak
V
SB pp
dV
SB load
dV
SB line
dV
SB temp
dI
SB share
Nominal Output Voltage
Output Setpoint Accuracy
Total Static Regulation
Nominal Output Power
1
Output Current
Peak Output Current
Output Ripple Voltage
Load Regulation
Line Regulation
Thermal Drift
Current Sharing
Current Share Bus Voltage
Load Transient Response
Recovery Time
Dynamic Load Regulation
Delay time from DC applied
Output Voltage Rise Time
Output Turn-on Overshoot
Remote Sense
Capacitive Loading
Over voltage Trip
2
DESCRIPTION / CONDITION
MIN
NOM
MAX
UNIT
0.5
∙
I
1 nom
,
T
A
= 25°C
12.0
-0.5
-5
2000
0.0
0.0
175.3
120
-160
-20
-4
9.4
0.6
0.5
11.4
1
12.6
3
10
200
13.2
0.25
0
20
15.0
13.6
0
20
-0.5
+4
167
+0.5
+5
VDC
%V
1 nom
%V
1 nom
W
ADC
ADC
mVpp
mV
mV
mV/°C
ADC
VDC
VDC
ms
V
sec
ms
V
V
mF
V
V
i min
to
V
i max
, 0 to 100%
I
1 nom,
T
A
= 0 to 40°C
V
i min
to
V
i max
,
T
A
= 0 to 55°C (PET2000-12-074ND)
V
i min
to
V
i max
,,
T
A
= 0 to 40°C (PET2000-12-074RD)
V
i min
to
V
i max
,,
T
A
= 0 to 55°C (PET2000-12-074ND)
V
i min
to
V
i max
,,
T
A
= 0 to 40°C (PET2000-12-074RD)
V
i min
to
V
i max
,
V
i min
to
V
i max
, 0 to 100%
I
1 nom
,
C
ext
≥
1 mF/Low ESR
V
i nom
, 0 to 100%
I
1 nom
V
i min
to
V
i max
, 0.5
∙
I
1 nom
V
i nom HL
, 0.5
∙
I
1 nom
Deviation from
I
1 tot
/ N,
I
1
> 10%
I
1 peak
at 180 A
Δ
I
1
= 50%
I
1 nom
,
I
1
= 10 … 100%
I
1 nom
,
C
ext
= 0 mF,
d
I
1
/d
t
= 1A/μs, recovery within 1% of
V
1 nom
Δ
I
1
= 50%
I
1 nom
, starting anywere from 10% to 60%,
f
= 50 ... 5000 Hz, Duty cycle = 10 ... 90%,
C
ext
= 2 ...30mF, di/dt =1A/µs, 25°C
V1 in regulation Vi = 0V to
V
i min
,
V
i nom,
V
i max
V
1
= 10…90%
V
1 nom
,
C
ext
< 10 mF
V
i nom
, 0 to 100%
I
1 nom
Compensation for cable drop, 0 to 100%
I
1 nom
V
i min
to
V
i max
,
I
SB
=1.25A (50% of
I
SBnom
, 25°C, (PET2000-12-074ND))
I
SB
=1.50A (50% of
I
SBnom
, 25°C, (PET2000-12-074RD))
V
i min
to
V
i max
, 0 to 100%
I
SB nom
V
i min
to
V
i max
,
T
A
= 0 to 70°C (PET2000-12-074ND)
V
i min
to
V
i max
,
T
A
= 0 to 55°C (PET2000-12-074RD)
V
i min
to
V
i max
(PET2000-12-074ND)
V
i min
to
V
i max
(PET2000-12-074RD)
V
i min
to
V
i max
,
T
A
= 0 to 70°C (PET2000-12-074ND)
V
i min
to
V
i max
,
T
A
= 0 to 55°C (PET2000-12-074RD)
V
i min
to
V
i max
(PET2000-12-074ND)
V
i min
to
V
i max
(PET2000-12-074RD)
V
i min
to
V
i max
, 0 to 100%
I
SB nom
,
C
ext
= 0 mF
V
i min
to
V
i max
, 0 to 100%
I
SB nom
,
C
ext
≥
2 mF/Low ESR
V
i nom HL
, 0 to 100%
I
SB nom
V
i min
to
V
i max
,
I
SB nom
= 0 A
V
i nom HL
,
I
SB nom
= 0 A
Deviation from
I
SB tot
/ N,
I
SB
= 0.5
∙
I
SB nom
Standby Output V
SB
Nominal Output Voltage
Output Setpoint Accuracy
Total Regulation
Nominal Output Power
Peak Output Power
Output Current
Peak Output Current
Output Ripple Voltage
2
Load Regulation
Line Regulation
Thermal Drift
Current Sharing
12.0
-2
-5
30
36
34
40
0
0
2.85
3.4
2.5
3.0
4.5
5
150
120
-300
-20
4
20
-0.5
-1
+1
+2
+5
VDC
%V
SBnom
%V
SBnom
W
W
W
W
ADC
ADC
ADC
ADC
mVpp
mVpp
mV
mV
mV/°C
ADC
3.8
3.5
1
2
See also chapter
TEMPERATURE AND FAN CONTROL
Measured with a 10 µF low ESR capacitor in parallel with a 0.1 µF ceramic capacitor at the point of measurement
tech.support@psbel.com
PET2000-12-074xD
dV
SB lt
t
rec
V
SB dyn
t
VSB rise
t
VSB ovr sh
C
VSB load
Load Transient Response
Recovery Time
Dynamic Load Regulation
Output Voltage Rise Time
Output Turn-on Overshoot
Capacitive Loading
Δ
I
SB
= 50%
I
SB nom
,
I
SB
= 0 … 100%
I
SB nom
,
d
I
SB
/d
t
= 1A/µs, recovery within 1% of
V
SB nom
Δ
I
SB
= 1 A,
I
SB
= 0 …
I
SB nom
,
f
= 50 ... 5000 Hz,
Duty cycle = 10 ... 90%,
C
ext
= 0 ... 5 mF
V
SB
= 10…90%
V
SB nom
,
C
ext
< 1 mF
10.8
5
0
10
0.2
1
0.3
2
13.2
20
13.2
3000
VDC
ms
V
ms
V
µF
5
V
i nom
, 0 to 100%
I
SB nom
6.
Figure 2. Efficiency vs. Output Power
7.
The output return path serves as power and signal ground. All output voltages and signals are referenced to these pins.
To prevent a shift in signal and voltage levels due to ground wiring voltage drop a low impedance ground plane should be used as
shown in
Figure 3
.
Alternatively, separated ground signals can be used as shown in
Figure 4
. In this case the two ground planes
should be connected together at the power supplies ground pins.
Figure 3. Common low impedance ground plane
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00773.0_AE
© 2018 Bel Power Solutions & Protection
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