The PES1600-12-080ND is a 1600 Watt DC to DC power supply that
converts -40 to -75 VDC voltage into an insulated main output of
+12 VDC for powering intermediate bus architectures (IBA) in high
performance and reliability servers, routers, and network switches.
The PES1600-12-080ND utilizes full digital control architecture for
greater efficiency, control, and functionality.
This power supply meets international safety standards and displays
the CE-Mark for the European Low Voltage Directive (LVD).
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Designed to meet Intel CPRS compatibility
Wide input voltage range: -40 to -75 VDC
1600 W continuous output power capability
Always-on 12 VSB / 3.5 A standby output
Hot-plug capable
Parallel operation with active current sharing
Full digital controls for improved performance
High power density design: 42 W/in3
Small form factor: 80 x 40 x 195 in mm
Hot-plug capable
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
PES1600-12-080ND
PES
1600
Power Level
1600 W
-
Dash
12
V1 Output
12 V
-
Dash
080
Width
80 mm
N
Airflow
N: Normal
D
Input
D: DC
Product Family
PES Front-Ends
The PES1600-12-080ND DC/DC power supply is a 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 PES1600-12-080ND 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
I2C bus. The I2C 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 I2C bus.
Figure 1. PES1600-12-080ND Block Diagram
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 maxc
Maximum Input
CONDITIONS / DESCRIPTION
Continuous
MIN
MAX
-78
UNITS
VDC
tech.support@psbel.com
PES1600-12-080ND
General Condition: T
A
= 0… 55 °C,
unless otherwise noted.
PARAMETER
Vi start
Vi nom
Vi
Ii
Ii pk
Vi
VSB_on
Vi
VSB_off
Vi
V1_on
Vi
V1_off
Minimum operating input
voltage
Nominal input voltage
Input voltage
Input current
Inrush current limitation
Turn-on standby input voltage
Turn-off standby input voltage
Turn-on V1 input voltage
Turn-off V1 input voltage
Normal operation (from Vi min to Vi max)
Vi > Vi min
From Vi min to Vi max, T
A
= 25°C, cold start
Ramping up
Ramping down
Ramping up
Ramping down
Vi = -48 VDC; -60 VDC; 10% load
η
Efficiency
1
Vi = -48 VDC; -60 VDC; 20% load
Vi = -48 VDC; -60 VDC; 50% load
V i= -48 VDC; -60 VDC; 100% load
-30
-28
-38
-37
82
90
94
91
2.5
15
3
DESCRIPTION / CONDITION
Stand-by output available, DSP running
MIN
-30
-48
-40
NOM
MAX
UNIT
VDC
-60
-75
46
50
-32
-30
-40
-39
VDC
VDC
A
A
VDC
VDC
VDC
VDC
%
%
%
%
ms
ms
T
V1_holdup
T
VSB_holdup
Hold-up time V1
Hold-up time Vsb
133 A on I1, 3.5 A on Vsb
Vsb full load
4.1 INPUT FUSE
A fast-acting 60 A input fuse in the negative voltage path inside the power supply protect against severe defects. The fuses are
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 input 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.
4.4 EFFICIENCY
High efficiency (see
Figure 2
) is achieved by using state-of-the-art silicon power devices in conjunction with soft-transition
topologies minimizing switching losses and a full digital control scheme. Synchronous rectifiers on the output reduce the losses
in the high current output path. The speed of the fan is digitally controlled to keep all components at an optimal operating
temperature regardless of the ambient temperature and load conditions.
1
Efficiency measured without fan power per EPA server guidelines.
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00940_006
© 2018 Bel Power Solutions
4
PES1600-12-080ND
Figure 2. Efficiency vs. Load current (ratio metric loading)
tech.support@psbel.com
PES1600-12-080ND
4.5 DC LINE TRANSIENT TEST
MINUS 75 VDC LINE TRANSIENT TEST
5
A standard line voltage momentary transient test is shown below. This test simulates a momentary voltage overshoot. This
should not affect the operation of the PSU, the output voltage should remain in regulation. This test shall be conducted every
10 sec for 30 min (180 times total).
Figure 3. Minus 75 VDC Line Transient Test
0 V LINE TRANSIENT TEST
A standard line voltage momentary blackout test is shown below. This test simulates a momentary switch throw off-on, see
graph below. The power supply should restart, not latch. This test shall be conducted 3 times in 10 min intervals.
Practically a blackout of any duration should not damage the power supply in any way and not cause a latch off condition.
Figure 4. 0 V Line Transient Test
The power supply shall also be able to withstand the following transients:
DURATION
200 µs max
SLOPE / RATE
-48 V
→
30 V
-
W / + 2 V / µs
-30 V
→
48 V
-
W / -2 V / µs
OUTPUT
Rated DC Voltages
Rated DC Voltages
PERFORMANCE CRITERIA
No loss of function or performance
No loss of function or performance
Table 1. Line Voltage Transient Limits
Asia-Pacific
+86 755 298 85888
Europe, Middle East
+353 61 225 977
North America
+1 408 785 5200
BCD.00940_006
© 2018 Bel Power Solutions
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