DELTA E48SC12008PNFH

FEATURES

High efficiency: 92% @ 12V/8A

Size:
58.4mmx22.8mmx8.4mm
(2.30”x0.90”x0.33”)
(Without heat-spreader)
58.4mmx22.8mmx12.7mm
(2.30”x0.90”x0.50”)
(With heat-spreader)

Standard footprint

Industry standard pin out

Fixed frequency operation

Input UVLO, Output OCP, OVP, OTP

2250V isolation

Basic insulation

No minimum load required

ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing facility

Delphi Series E48SC12008, Eighth Brick Family
DC/DC Power Modules: 48V in, 12V/8A out
The Delphi Series E48SC12008, Eighth Brick, 48V input, single output,
isolated DC/DC converter is the latest offering from a world leader in
UL/CUL 60950-1 (US & Canada) Recognized
OPTIONS

Negative/Positive on/off logic

SMT or through-hole version
power systems technology and manufacturing -- Delta Electronics, Inc.
This product family provides up to 96 watts, improved and very cost
effective power solution of industry standard footprint and pinout. With
creative design technology and optimization of component placement,
these
converters
possess
outstanding
electrical
and
thermal
performances, 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_ E48SC12008_03192012
APPLICATIONS

Telecom / Datacom

Wireless Networks

Optical Network Equipment

Server and Data Storage

Industrial / Testing Equipment
LUO LUOTECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
E48SC12008 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient
100ms
Operating Ambient Temperature
-40
Storage Temperature
-55
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
36
Input Under-Voltage Lockout
Turn-On Voltage Threshold
33
Turn-Off Voltage Threshold
31
Lockout Hysteresis Voltage
1
Maximum Input Current
100% Load, 36Vin
No-Load Input Current
Off Converter Input Current
2
Inrush Current(I t)
Input Reflected-Ripple Current
P-P thru 12µH inductor, 5Hz to 20MHz
Input Voltage Ripple Rejection
120 Hz
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=48V, Io=Io.max, Tc=25°C
11.88
Output Voltage Regulation
Over Load
Io=Io,min to Io,max
Over Line
Vin= 36V to 75V
Over Temperature
Tc= -40°C to 85°C
Total Output Voltage Range
Over sample load, line and temperature
11.76
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, 1µF ceramic, 10µF tantalum
RMS
Full Load, 1µF ceramic, 10µF tantalum
Operating Output Current Range
0
Output DC Current-Limit Inception
Output Voltage 10% Low
110
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current
25% Io.max to 50% Io.max
Negative Step Change in Output Current
50% Io.max to 25% Io.max
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
Full load; 5% overshoot of Vout at startup
EFFICIENCY
100% Load
48Vin
60% Load
48Vin
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
10
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Von/off at Ion/off=1.0mA
-0.7
Logic High (Module Off)
Von/off at Ion/off=0.0 µA
3.5
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Von/off at Ion/off=1.0mA
-0.7
Logic High (Module On)
Von/off at Ion/off=0.0 µA
3.5
ON/OFF Current (for both remote on/off logic)
Ion/off at Von/off=0.0V
Leakage Current (for both remote on/off logic)
Logic High, Von/off=12V
Pout ≦ max rated power
Output Voltage Trim Range
-10%
Pout ≦ max rated power
Output Voltage Remote Sense Range
Output Over-Voltage Protection
Over full temperature range
13.8
GENERAL SPECIFICATIONS
MTBF
Io=80% of Io, max; 300LFM @25C
Weight
Without heat-spreader
Weight
With heat-spreader
Over-Temperature Shutdown
Refer to Figure 19 for Hot spot 1 location
( Without heat spreader, Hot spot 1)
(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)
Over-Temperature Shutdown
Refer to Figure 19 for NTC resistor location
( Without heat spreader, NTC Resistor)
Over-Temperature Shutdown
Refer to Figure 21 for Hot spot 2 location
(With heat spreader, Hot spot 2)
(48Vin,80% Io, 200LFM,Airflow from Vin+ to Vin-)
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference.
DS_E48SC12008_03192012
Typ.
34
32
2
Max.
Units
80
100
85
125
2250
Vdc
Vdc
°C
°C
Vdc
75
Vdc
35
33
3
3.5
Vdc
Vdc
Vdc
A
mA
mA
2
As
mA
dB
80
10
1
20
60
12.00
12.12
Vdc
±3
±3
±15
±15
±100
12.25
mV
mV
mV
V
40
15
120
25
8
140
mV
mV
A
%
200
200
200
40
40
mV
mV
µs
80
80
2000
92.0
90.5
%
%
2250
Vdc
MΩ
pF
400
kHz
0.8
12
V
V
0.8
12
1
50
10%
10
16.8
V
V
mA
µA
%
%
V
1000
350
15.0
ms
ms
µF
2.2
21.4
33.5
M hours
grams
grams
127
°C
123
°C
118
°C
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for 8A, minimum, nominal,
and maximum input voltage at 25°C
Figure 2: Power dissipation vs. load current for 8A, minimum,
nominal, and maximum input voltage at 25°C.
Figure 3: Typical full load input characteristics at room
temperature
DS_E48SC12008_03192012
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4: Turn-on transient at full rated load current (CC Mode
load) (10ms/div). Vin=48V.Top Trace: Vout, 5V/div; Bottom
Trace: ON/OFF input, 5V/div
DS_E48SC12008_03192012
Figure 5: Turn-on transient at zero load current (10ms/div).
Vin=48V.Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input,
5V/div
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 6: Output voltage response to step-change in load
current (50%-25%-50% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (200mV/div, 200us/div), Bottom Trace: I out (2A/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 7: Output voltage response to step-change in load
current (50%-25%-50% of Io, max; di/dt = 2.5A/µs). Load cap:
10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (200mV/div, 200us/div), Bottom Trace: I out (2A/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 8: 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 12μH. Capacitor Cs offset possible
battery impedance. Measure current as shown above
DS_E48SC12008_03192012
5
ELECTRICAL CHARACTERISTICS CURVES
Figure 9: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (100mA/div,1us/div)
Copper
Figure 10: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load current
(20mA/div,1us/div)
Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 11: Output voltage noise and ripple measurement test
setup
DS_E48SC12008_03192012
6
ELECTRICAL CHARACTERISTICS CURVES
13.0
12.0
11.0
OUTPUT VOLTAGE(V)
10.0
9.0
8.0
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0
0
Figure 12: Output voltage ripple at nominal input voltage and
rated load current (Io=8A)(20mV/div,1us/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
DS_E48SC12008_03192012
1
2
3
4
5
6
7
8
OUTPUT CURRENT(A)
9
10
11
12
Figure 13: Output voltage vs. load current showing typical
current limit curves and converter shutdown points
7
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.
Schematic and components list
Cin is 100uF low ESR Aluminum cap;
Cx is 2.2uF ceramic cap;
CY1,CY2 are 22nF ceramic caps;
L1 is common-mode inductor,L1=1.32mH;
end-user’s safety agency standard, i.e., UL60950-1,
CSA C22.2 NO. 60950-1 2nd and IEC 60950-1 2nd :
2005 and EN 60950-1 2nd: 2006+A11+A1: 2010, 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.

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.
Test result: Vin=48V, Io=8A,
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
dBμV
80.0
Limits
55022MQP
55022MAV
70.0
60.0
50.0
40.0
Transducer
LISNPUL
Traces
PK+
AV
30.0
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
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
20.0
10.0
0.0
150 kHz
1 MHz
10 MHz
30 MHz
Green line is quasi peak mode, blue line is average
mode.
Safety Considerations
The power module must be installed in compliance
with the spacing and separation requirements of the
DS_E48SC12008_03192012
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.
8
FEATURES DESCRIPTIONS
Vi(+)
Vo(+)
Over-Current Protection
Sense(+)
The modules include an internal output over-current
protection circuit, which will endure current limiting for
an unlimited duration during output overload. If the
output current exceeds the OCP set point, the modules
will automatically shut down (hiccup mode).
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 (hiccup mode)。
The modules will try to restart after shutdown. If the over
voltage condition still exists, the module will shut down
again. This restart trial will continue until the over
voltage condition is corrected.
Over-Temperature Protection
ON/OFF
Sense(-)
Vi(-)
Vo(-)
Figure 14: 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).
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 restart if the
temperature is within specification.
Vi(+)
Vo(+)
Sense(+)
Remote On/Off
Sense(-)
Vi(-)
Vo(-)
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.
Figure 15: Effective circuit configuration for remote sense
operation
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.
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(–) at the module.
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.
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.
Contact
Resistance
Contact and Distribution
Losses
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.
DS_E48SC12008_03192012
9
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.
Figure 17: Circuit configuration for trim-up (increase output
voltage)
Figure 16: 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. 16). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
Rtrim  down 
Rtrim  up 
5.11Vo (100   ) 511

 10.2K
1.225

Ex. When Trim-up +10%(12V×1.1=13.2V)
Rtrim  up 
5.11  12  (100  10 ) 511

 10.2  489.329K 
1.225  10
10
511
 10.2K 

Ex. When Trim-down -10%(12V×0.9=10.8V)
Rtrim  down 
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 17). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
511
 10.2  40.9K 
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.
When using remote sense and trim, the output voltage
of the module is usually increased, which increase the
output power 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.
DS_E48SC12008_03192012
10
THERMAL CONSIDERATIONS
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.
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’’).
PWB
FANCING PWB
MODULE
50.8(2.00")
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
AIR FLOW
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 18: Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the module.
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.
DS_E48SC12008_03192012
11
THERMAL CURVES
(WITHOUT HEAT SPREADER)
NTC RESISTOR
THERMAL CURVES
(WITH HEAT SPREADER)
AIRFLOW
AIRFLOW
HOT SPOT 1
HOT SPOT 2
Figure 19: * Hot spot 1& NTC resistor temperature measured
Figure 21: * Hot spot 2 temperature measured point
points
Output Current (A)
9.0
E48SC12008(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
Output Current (A)
9.0
E48SC12008(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation; With Heatspreader)
8.0
8.0
7.0
7.0
Natural
Convection
6.0
Natural
Convection
6.0
100LFM
100LFM
5.0
200LFM
5.0
200LFM
300LFM
300LFM
4.0
500LFM
500LFM
3.0
400LFM
4.0
400LFM
3.0
600LFM
2.0
2.0
1.0
1.0
0.0
0.0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 20: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin+ to
Vin-,without heat spreader)
DS_E48SC12008_03192012
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, airflow from Vin+ to Vin-,with
heat spreader)
12
PICK AND PLACE LOCATION(SMD)
RECOMMENDED PAD LAYOUT (SMD)
SURFACE-MOUNT TAPE & REEL
DS_E48SC12008_03192012
13
LEADED (Sn/Pb) PROCESS RECOMMEND TEMPERATURE PROFILE(SMD)
Note: The temperature refers to the pin of E48SC, measured on the pin +Vout joint.
LEAD FREE (SAC) PROCESS RECOMMEND TEMPERATURE PROFILE(SMD)
Temp.
Peak Temp. 240 ~ 245 ℃
217℃
Ramp down
max. 4℃/sec.
200℃
150℃
Preheat time
100~140 sec.
Time Limited 90 sec.
above 217℃
Ramp up
max. 3℃/sec.
25℃
Time
Note: The temperature refers to the pin of E48SC, measured on the pin +Vout joint.
DS_E48SC12008_03192012
14
MECHANICAL DRAWING
Surface-mount module
Through-hole module
All pins are copper alloy with tin plated over Nickel under plating.
DS_E48SC12008_03192012
15
MECHANICAL DRAWING(WITH HEAT-SPREADER)
* For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly
onto system boards; please do not subject such modules through reflow temperature profile.
All pins are copper alloy with tin plated over Nickel under plating.
DS_E48SC12008_03192012
16
PART NUMBERING SYSTEM
E
48
S
Type of
Input Number of
Product Voltage Outputs
E- Eighth
Brick
48 36~75V
S- Single
C
120
08
N
R
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length/Type
120 - 12V
08 -8A
N - Negative
K – 0.110’’
F- RoHS 6/6
A- Standard Functions
P - Positive
N - 0.145”
(Lead Free)
H - with Heatspreader
C- Improved
E48SR series
F
A
Option Code
R - 0.170”
Space -
C - 0.181”
RoHS 5/6
S - 0.189”
T - 0.220”
L - 0.248”
M - SMD pin
MODEL LIST
MODEL NAME
E48SC12008NRFH
E48SC12008NRFA
INPUT
36V -75V
36V -75V
OUTPUT
3.5A
3.5A
12V
12V
EFF @ 100% LOAD
8A
8A
92%
92%
Default remote on/off logic is negative and pin length is 0.145”
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: DCDC@delta-corp.com
Europe:
Telephone: +31-20-655-0967
Fax: +31-20-655-0999
Email: DCDC@delta-es.com
Asia & the rest of world:
Telephone: +886 3 4526107
Ext.6220~6224
Fax: +886 3 4513485
Email: DCDC@delta.com.tw
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.
DS_E48SC12008_03192012
17