E48SH05020

FEATURES

High efficiency: 90% @5V/20A

Size:
58.4mm x 22.8mm x 9.5mm
(2.30”x0.90”x0.37”)

Industry standard pin out

Fixed frequency operation

Input UVLO, Output OTP, OCP, OVP

Monotonic startup into normal and
pre-biased loads

Very fast transient response

2250V Isolation and basic insulation

No minimum load required

SMD and through-hole versions

No negative current during power or enable
on/off

ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing facility

UL/cUL 60950 (US & Canada) recognized,
and TUV (EN60950) certified

directive
Delphi Series E48SH, 120W Eighth Brick Family
DC/DC Power Modules: 48V in, 5V/20A out
The Delphi Series E48SH Eighth Brick, 48V input, single output, isolated
DC/DC converters are the latest offering from a world leader in power
systems technology and manufacturing ― Delta Electronics, Inc. This
product family is available in either a through-hole or surface-mounted
package and provides up to 120 watts of power or 50A of output current
(1.2V and below) in an industry standard footprint and pinout. The
E48SH converter operates from an input voltage of 36V to 75V and is
available in output voltages from 1.0V to 15V. Efficiency is up to 90% for
5V output at 20A full load. With creative design technology and
optimization of component placement, these converters possess
outstanding electrical and thermal performance, as well as extremely
high reliability under highly stressful operating conditions. All models are
fully protected from abnormal input/output voltage, current, and
temperature conditions. The Delphi Series converters meet all safety
requirements with basic insulation.
DATASHEET
DS_E48SH05020_03272015
CE mark meets 73/23/EEC and 93/68/EEC
OPTIONS

Positive On/Off logic

Short pin lengths available

External Synchronization

Output OVP latch mode

Output OCP latch mode

Heat spreader
APPLICATIONS

Telecom/DataCom

Wireless Networks

Optical Network Equipment

Server and Data Storage

Industrial/Test Equipment
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
E48SH05020 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
2
Inrush Current(I t)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
EFFICIENCY
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
CMTBF
Weight
Over-Temperature Shutdown
100ms
Refer to Figure 21 for measuring point
Typ.
-40
-55
Vdc
Vdc
°C
°C
Vdc
75
Vdc
33
31
1
34
32
2
35
33
3
3.7
120
10
1
Vdc
Vdc
Vdc
A
mA
mA
2
As
mA
dB
5.0
5.05
Vdc
±3
±3
±25
±10
±10
5.1
mV
mV
mV
V
40
10
60
20
20
140
mV
mV
A
%
60
60
30
100
100
mV
mV
us
15
15
25
25
10000
ms
ms
µF
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Output Voltage 10% Low
75
100
129
125
2250
48
60
3
Io=Io,min to Io,max
Vin=36V to 75V
Tc=-40°C to 85°C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Units
36
100% Load, 36Vin
Vin=48V, Io=Io.max, Tc=25°C
Max.
20
50
4.95
4.9
0
110
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
Full load; no overshoot of Vout at startup
90
91.5
%
%
2250
10
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Across Pins 9 & 5, Pout ≦ max rated power
Pout ≦ max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; 300LFM @25℃
Refer to Figure 21 for measuring point
1500
Vdc
MΩ
pF
250
kHz
0
3
1.2
50
V
V
0
3
1.2
50
1
50
10%
10
130
V
V
mA
uA
%
%
%
-20%
118
2.57
25
135
M hours
grams
°C
E48SH05020_03272015
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ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
4
3.5
INPUT CURRENT( A)
3
2.5
2
1.5
1
0.5
0
30
34
38
42
46
50
54
58
62
66
70
74
INPUT VOLTAGE(V)
Figure 3: Typical full load input characteristics at room
temperature.
E48SH05020_03272015
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ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4: Turn-on transient at zero load current (5 ms/div).
Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input,
5V/div.
Figure 5: Turn-on transient at full rated load current (constant
current load) (5 ms/div). Vin=48V.Top Trace: Vout, 2V/div;
Bottom Trace: ON/OFF input, 5V/div.
For Input Voltage Start up
Figure 6: Turn-on transient at zero load current (5 ms/div).
Vin=48V.Top Trace: Vout, 2V/div, Bottom Trace: input voltage,
50V/div.
Figure 7: Turn-on transient at full rated load current (constant
current load) (5 ms/div). Vin=48V.Top Trace: Vout, 2V/div;
Bottom Trace: input voltage, 50V/div.
E48SH05020_03272015
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ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF,
tantalum capacitor and 1µF ceramic capacitor. Trace: Vout
(50mV/div, 100us/div), Scope measurement should be made
using a BNC cable (length shorter than 20 inches). Position the
load between 51 mm to 76 mm (2 inches to 3 inches) from the
module.
Figure 9: Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF,
tantalum capacitor and 1µF ceramic capacitor. Trace: Vout
(50mV/div, 100us/div), Scope measurement should be made
using a BNC cable (length shorter than 20 inches). Position the
load between 51 mm to 76 mm (2 inches to 3 inches) from the
module.
Figure 10: Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (LTEST) of 12 μH. Capacitor Cs offset
possible battery impedance. Measure current as shown above.
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (200 mA/div, 2us/div).
E48SH05020_03272015
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ELECTRICAL CHARACTERISTICS CURVES
Copper
Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 2us/div).
Figure 13: Output voltage noise and ripple measurement test
setup.
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=20A)(50 mV/div, 2us/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements should be
made using a BNC cable (length shorter than 20 inches).
Position the load between 51 mm to 76 mm (2 inches to 3
inches) from the module.
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
E48SH05020_03272015
6
DESIGN CONSIDERATIONS
Input Source Impedance
The impedance of the input source connecting to the
DC/DC power modules will interact with the modules and
affect the stability. A low ac-impedance input source is
recommended. If the source inductance is more than a
few μH, we advise adding a 10 to 100 μF electrolytic
capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the
input of the module to improve the stability.
Layout and EMC Considerations
Delta’s DC/DC power modules are designed to operate
in a wide variety of systems and applications. For design
assistance with EMC compliance and related PWB
layout issues, please contact Delta’s technical support
team. An external input filter module is available for
easier EMC compliance design. Application notes to
assist designers in addressing these issues are pending
release.
Safety Considerations
The power module must be installed in compliance with
the spacing and separation requirements of the
end-user’s safety agency standard, i.e., UL60950,
CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and
IEC60950-1999, if the system in which the power module
is to be used must meet safety agency requirements.
Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2 or
SELV. An additional evaluation is needed if the source
is other than TNV-2 or SELV.
When the input source is SELV circuit, the power module
meets SELV (safety extra-low voltage) requirements. If
the input source is a hazardous voltage which is greater
than 60 Vdc and less than or equal to 75 Vdc, for the
module’s output to meet SELV requirements, all of the
following must be met:

The input source must be insulated from the ac
mains by reinforced or double insulation.

The input terminals of the module are not operator
accessible.

If the metal base plate is grounded, the output
should be also grounded.

A SELV reliability test is conducted on the system
where the module is used, in combination with the
module, to ensure that under a single fault,
hazardous voltage does not appear at the module’s
output.
When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
This power module is not internally fused. To achieve
optimum safety and system protection, an input line fuse
is highly recommended. The safety agencies require a
normal-blow fuse with 10A maximum rating to be
installed in the ungrounded lead. A lower rated fuse can
be used based on the maximum inrush transient energy
and maximum input current.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly
process before the board or system undergoes electrical
testing. Inadequate cleaning and/or drying may lower the
reliability of a power module and severely affect the
finished circuit board assembly test. Adequate cleaning
and/or drying is especially important for un-encapsulated
and/or open frame type power modules. For assistance
on appropriate soldering and cleaning procedures,
please contact Delta’s technical support team.
E48SH05020_03272015
7
FEATURES DESCRIPTIONS
Vi(+)
Vo(+)
Over-Current Protection
Sense(+)
The E48SH modules include an internal output
over-current protection circuit, which will endure current
limiting for an unlimited duration during output overload.
When the output current exceeds the OCP set point, the
current limit function will work by initially reduce duty
cycle of the module, the unit will go out of regulation but
remains in safe operating area before the output drops
below 50%. When output drops below 50%, the
modules will automatically shut down and enter hiccup
mode.
During hiccup, the modules will try to restart after
shutdown. If the overload condition still exists, the
module will shut down again. This restart trial will
continue until the overload condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the over-voltage
set point, the module will shut down and restart after
200mS. latch off mode is optional. Under latch off mode
the over-voltage latch is reset by either cycling the input
power or by toggling the on/off signal for one second.
ON/OFF
Sense(-)
Vi(-)
Figure 16: Remote on/off implementation
Remote Sense
Remote sense compensates for voltage drops on the
output by sensing the actual output voltage at the point
of load. The voltage between the remote sense pins
and the output terminals must not exceed the output
voltage sense range given here:
[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout
This limit includes any increase in voltage due to
remote sense compensation and output voltage set
point adjustment (trim).
Vi(+)
Over-Temperature Protection
Remote On/Off
The remote on/off feature on the module can be either
negative or positive logic. Negative logic turns the
module on during a logic low and off during a logic high.
Positive logic turns the modules on during a logic high
and off during a logic low.
Remote on/off can be controlled by an external switch
between the on/off terminal and the Vi(-) terminal. The
switch can be an open collector or open drain.
For negative logic if the remote on/off feature is not
used, please short the on/off pin to Vi(-). For positive
logic if the remote on/off feature is not used, please
leave the on/off pin to floating.
Vo(+)
Sense(+)
The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
temperature exceeds the over-temperature threshold
the module will shut down.
The module will keep checking the temperature of
module after shutdown. If the temperature decreases
more than the hysterisis temperature (typical 15℃), the
module will re-start. Otherwise the module will keep off.
Vo(-)
Sense(-)
Vi(-)
Contact
Resistance
Vo(-)
Contact and Distribution
Losses
Figure 17: Effective circuit configuration for remote sense
operation
If the remote sense feature is not used to regulate the
output at the point of load, please connect SENSE(+) to
Vo(+) and SENSE(–) to Vo(–) externally during
application.
The output voltage can be increased by both the
remote sense and the trim; however, the maximum
increase is the larger of either the remote sense or the
trim, not the sum of both.
When using remote sense and trim, the output voltage
of the module is usually increased, which increases the
power output of the module with the same output
current.
Care should be taken to ensure that the maximum
output power does not exceed the maximum rated
power.
E48SH05020_03272015
8
FEATURES DESCRIPTIONS (CON.)
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
the modules may be connected with an external
resistor between the TRIM pin and either the
SENSE(+) or SENSE(-). The TRIM pin should be left
open if this feature is not used.
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 19). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
Rtrim  up 
5.11Vo (100   ) 511

 10.2K
1.225 

Ex. When Trim-up +10%(5V×1.1=5.5V)
Rtrim  up 
5.11 5  (100  10 ) 511

 10.2  168K
1.225  10
10
The output voltage can be increased by both the remote
sense and the trim, however the maximum increase is
the larger of either the remote sense or the trim, not the
sum of both.
Figure 18: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and SENSE (-) pins, the output voltage set point
decreases (Fig. 18). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
Rtrim  down 
When using remote sense and trim, the output voltage
of the module is usually increased, which increases the
power output of the module with the same output
current.
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
511
 10.2K

Ex. When Trim-down -10%(5V×0.9=4.5V)
Rtrim  down 
511
 10.2  40.9K
10
Figure 19: Circuit configuration for trim-up (increase output
voltage)
E48SH05020_03272015
9
THERMAL CONSIDERATIONS
Thermal Derating
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Heat can be removed by increasing airflow over the module.
The hottest point temperature of the module is 129℃. To
enhance system reliability; the power module should always be
operated below the maximum operating temperature. If the
temperature exceeds the maximum module temperature,
reliability of the unit may be affected.
THERMAL CURVES
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
Figure 21: Temperature measurement location
＊ The allowed maximum hot spot temperature is defined at 129℃
Output Current(A)
E48SH05020(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
600LFM
500LFM
20
18
PWB
FACING PWB
Natural
Convection
16
MODULE
100LFM
14
12
200LFM
300LFM
10
400LFM
8
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
6
4
50.8 (2.0”)
2
0
AIR FLOW
20
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 22: Output current vs. ambient temperature and air velocity @
Vin=48V (Transverse Orientation)
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 20: Wind tunnel test setup
E48SH05020_03272015
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MANUFACTURE
CONSIDERATION
Pick and place location(SMD)
Surface mount tape & reel packing
Recommended Pad layout (SMD)
E48SH05020_03272015
11
LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE(for SMD model only)
The module is lead-free(Pb free) and RoHS compliant in a Pb free soldering process. It is comply with J-STD-020 for both Pb free
soldering and leaded soldering in customer side. The recommended leaded reflow soldering profile as following
Note: The temperature refers to the pin of E48SH, measured on the pin +Vout joint.
Lead Free (SAC) Process recommend Temp. Profile(for SMD module only)
The module is lead-free(Pb free) and RoHS compliant in a Pb free soldering process. It is comply with J-STD-020 for both Pb free
soldering and leaded soldering in customer side. The recommended lead free reflow soldering profile as following.
Temp.
Peak Temp. 240 ~ 245 ℃
217℃
Ramp down
max. 4℃/sec.
200℃
Preheat time
100~140 sec.
150℃
Time Limited 90 sec.
above 217℃
Ramp up
max. 3℃/sec.
25℃
Time
Note: The temperature refers to the pin of E48SH, measured on the pin +Vout joint.
E48SH05020_03272015
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MECHANICAL DRAWING (WITHOUT HEATSPREADER)
SURFACE-MOUNT MODULE
Pin No.
1
2
3
4
5
6
7
8
Name
+Vin
ON/OFF
-Vin
-Vout
-SENSE
TRIM
+SENSE
+Vout
THROUGH-HOLE MODULE
Function
Positive input voltage
Remote ON/OFF
Negative input voltage
Negative output voltage
Negative remote sense
Output voltage trim
Positive remote sense
Positive output voltage
E48SH05020_03272015
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MECHANICAL DRAWING (WITH HEATSPREADER)
THROUGH-HOLE MODULE
E48SH05020_03272015
14
PART NUMBERING SYSTEM
E
48
S
H
050
20
N
R
Type of
Product
Input
Voltage
Number of
Outputs
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length/type
S- Single
H-50A series
050 – 5.0V
20 -20A
N- Negative
R- 0.170”
P- Positive
N- 0.145”
E- Eighth 48-36V~75V
Brick
F
A
Option Code
F- RoHS 6/6 A - Standard functions
(Lead Free) H - With heatspreader
K- 0.110”
M- SMD
MODEL LIST
MODEL NAME
INPUT
OUTPUT
EFF @ 100% LOAD
E48SH05020NRFA
36V~75V
3.7A
5.0V
20A
90%
E48SH05020NNFA
36V~75V
3.7A
5.0V
20A
90%
Default remote on/off logic is negative and pin length is 0.170”
For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales
office.
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Telephone: +31-20-655-0967
Fax: +31-20-655-0999
Asia & the rest of world:
Telephone: +886 3 4526107 x 6220~6224
Fax: +886 3 4513485
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available upon
request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by Delta for
its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No license is
granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right to revise these
specifications at any time, without notice.
E48SH05020_03272015
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