DELTA E48SB9R625NKFA

FEATURES
High efficiency: 96.5% @ 9.6V/25A
Size: 58.4mm x 22.8mm x 11.3mm
(2.28” x 0.90” x 0.44”)
Industry standard pinout
Fully protected: Input UVLO, OVP, Output
OCP and OTP
240W constant power output
Parallelable for higher output power
2250V isolation
Basic insulation
Monotonic startup
No minimum load required
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
CE mark meets 73/23/EEC and 93/68/EEC
directives
Delphi Series E48SB, 240W Eighth Brick Bus Converter
DC/DC Power Modules: 48Vin, 9.6V/25A out
OPTIONS
Delta Electronics, Inc., a world leader in power systems technology and
manufacturing, has introduced the E48SB, eighth brick sized 240W
bus converter, into their Delphi Series of board mounted DC/DC power
converters to support the intermediate bus architecture to power multiple
downstream non-isolated point-of-load (POL) converters. The E48SB
product family features an input voltage of 38V to 55V, and provides up to
240W (9.6V and above) of power in an industry standard eighth brick
footprint. Typical efficiency of 9.6V module is 96.5%. With optimized
component placement, creative design topology, and numerous patented
technologies, the E48SB bus converters deliver outstanding electrical and
thermal performance. An optional heatsink is available for harsh thermal
requirements.
Positive On/Off logic
Short pin lengths
Heatsink available for extended
operation
OTP and OCP mode (Auto re-restart or
latch)
APPLICATIONS
Datacom / Netowrking
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Testing Equipment
DATASHEET
DS_E48SB9R625_01232007
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
E48SB9R625 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
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
Input Over-Voltage Lockout
Turn-Off Voltage Threshold
Turn-On Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Inrush Current (I2t)
Input Reflected-Ripple Current
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 Power Range
Output DC Powert-Limit Inception
Current share accuracy (2 units in parallel)
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)
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
DS_E48SB9R625_01232007
Refer to Figure 17 for the measuring point, Tc
Typ.
-40
-55
Max.
Units
60
117
125
2250
Vdc
°C
°C
Vdc
38
48
55
Vdc
35
33
1
36.5
34.5
2
38
36
3
Vdc
Vdc
Vdc
58
57
1
60
58.5
1.5
62
60
2.5
6.65
120
15
0.03
25
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
38V Vin , 100% Load
80
7
P-P thru 12µH inductor, 5Hz to 20MHz
15
Vin=48V, Io=no load, Ta=25°C
9.5
Io=Io,min to Io,max
Vin=38V to 55V
Tc=-40°C to 100°C
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Full input voltage range
Full input voltage range
% of rated output current
300
3.4
400
3.6
200
11
mV
V
mV
V
100
25
150
40
240
140%
mV
mV
W
W
%
80
80
90
150
150
120
mV
mV
us
15
20
25
30
3000
ms
ms
µF
7.0
0
110%
Vdc
10
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
8
15
Vin=48V
Vin=48V
96.5
96.0
%
%
10
1000
2250
Vdc
MΩ
pF
130
kHz
Von/off
Von/off
-0.7
2
0.8
18
V
V
Von/off
Von/off
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
-0.7
2
0.8
18
0.3
30
V
V
mA
uA
Io=80% of Io, max; Ta=25°C
Refer to Figure 17 for the measuring point, Tc
0.25
1.86
31.76
122
M hours
grams
°C
2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
Figure 2: Power loss vs. load current for minimum, nominal,
and maximum input voltage at 25°C.
12
11
10
Output Voltage(V)
9
8
7
6
5
4
3
38Vin
2
48Vin
55Vin
1
0
0
3
6
9
12
15 18 21 24 27 30
Output Current(A)
33
36
39
42
45
Figure 3: Output voltage regulation vs load current showing
typical current limit curves and converter shutdown points for
minimum, nominal, and maximum input voltage at room
temperature .
DS_E48SB9R625_01232007
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ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Turn on Waveform
0
0
Figure 4: Turn-on transient at full rated load current
(5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF
input: 2V/div
0
0
Figure 5: Turn-on transient at zero load current (5 ms/div). Top
Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div
For Vin Input Turn on Waveform
0
0
0
0
Figure 6: Turn-on transient at full rated load current
(5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: Vin;
50V/div.
DS_E48SB9R625_01232007
Figure 7: Turn-on transient at zero load current (5 ms/div). Top
Trace: Vout: 5V/div; Bottom Trace: Vin; 50V/div.
4
ELECTRICAL CHARACTERISTICS CURVES
0
0
0
0
Figure 8: Output voltage response to step-change in load
current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (100mV/div, 100us/div), Bottom Trace: Iout (10A/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%-50% of Io,max; di/dt=1A/µs). Load cap:
10uF ,tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (200mV/div, 100us/div), Bottom Trace: Iout (5A/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 below
DS_E48SB9R625_01232007
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ELECTRICAL CHARACTERISTICS CURVES
0
0
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 10µH source impedance
and 47µF electrolytic capacitor (200 mA/div, 2us/div).
Figure 12: Input reflected ripple current, is, through a 10µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 2us/div).
Copper Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 13: Output voltage noise and ripple measurement test
setup.
DS_E48SB9R625_01232007
0
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (50 mV/div, 2us/div). Load capacitance: 1µF
ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20
MHz. 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.
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 33 to 220µF electrolytic
capacitor (ESR < 0.5 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.
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.
Over-Temperature Protection
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, and enter in auto-restart
mode or latch mode, which is optional.
For auto-restart mode, the module will monitor the
module temperature after shutdown. Once the
temperature is within the specification, the module will
be auto-restart.
For latch mode, the module will latch off once it
shutdown. The latch is reset by either cycling the input
power or by toggling the on/off signal for one second.
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 floating.
Vi(+)
FEATURES DESCRIPTIONS
Vo(+)
R
ON/OFF
Load
Over-Current Protection
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, and enter hiccup mode or latch
mode, which is optional.
Vi(-)
Vo(-)
Figure 15: Remote on/off implementation
For hiccup mode, the module 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.
For latch mode, the module will latch off once it shutdown.
The latch is reset by either cycling the input power or by
toggling the on/off signal for one second.
DS_E48SB9R625_01232007
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DESIGN CONSIDERATIONS
Current Sharing
The modules are capable of operating in parallel without
any external current sharing circuitry.
For a normal parallel operation, the following
precautions must be observed:
1. The current sharing accuracy calculation equation is:
Current sharing accuracy=((I load/n)-I)*100%)/I rated
Where, I load=Total load current;
I= Output current of per converter;
Irated=Converter’s rated output current at different Vin;
n=the numberous of parallel modules
2. The maximum load current for N converters is
Imax=(1-X%)*N*Irated.
Where, X% is current sharing load accuracy.
Irated is 100% load for different Vin
This unit has been tested with up to 2 units in
parallel.
3. To ensure a better steady current sharing accuracy,
below design guideline should be followed:
a) The inputs of the converters must be connected to the
same voltage source
b) The PCB trace resistance from Input voltage source to
Vin+ and Vin- of each converter should be as equalize as
possible.
c) The PCB trace resistance from each converter’s
output to the load should be equalized as much as
possible.
4. To ensure a better transient current sharing, and the
monotonic startup of the parallel module
a) The ON/OFF pin of the converters should be
connected together to keep the parallel modules start up
at the approximately same time.
b) The under voltage lockout point will slightly vary from
unit to unit. The dv/dt of the rising edge of the input
source voltage must be greater than 1V/ms to ensure
that the parallel can start up at the approximately same
time.
DS_E48SB9R625_01232007
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THERMAL CONSIDERATIONS
THERMAL CURVES
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.
Figure 17: Temperature measurement location
The allowed maximum hot spot temperature is defined at 117℃
Output Current(A)
E48SB9R625(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
25
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
FACING PWB
Natural
Convection
20
100LFM
15
200LFM
300LFM
400LFM
10
500LFM
5
MODULE
0
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 18: Output current vs. ambient temperature and air
[email protected]=48V (Transverse Orientation).
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
50.8 (2.0”)
AIR FLOW
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 16: 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_E48SB9R625_01232007
9
MECHANICAL DRAWING
Pin No.
Name
Function
1
2
3
4
5
-Vin
ON/OFF
+Vin
+Vout
-Vout
Negative input voltage
Remote ON/OFF
Positive input voltage
Positive output voltage
Negative output voltage
Pin Specification:
Pins 1-3 1.0mm (0.040”) diameter
Pins 4-5 1.5mm (0.060”) diameter
All pins are copper with Tin plating (Pb free)
DS_E48SB9R625_01232007
10
PART NUMBERING SYSTEM
E
48
S
B
9R6
25
N
R
Type of
Product
Input
Voltage
Number of
Outputs
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin Length
48- 38V~55V
S- Single
9R6- 9.6V
25- 25A
N- Negative
R- 0.170”
F- RoHS 6/6
A- OCP, OTP
P- Positive
N- 0.145”
(Lead Free)
hiccup
E- Eighth
B- Bus
Brick
Converter
F
A
Option Code
K- 0.110”
B- OCP, OTP
latch-up
MODEL LIST
MODEL NAME
E48SB9R625NRFA
E48SB12020NRFA
INPUT
38V~55V
38V~55V
OUTPUT
6.65A
6.5A
9.6V
12V
25A
20A
EFF @ 100% LOAD
240W
240W
96.5%
96.3%
Note:
1.
2.
3.
4.
Default remote on/off logic is negative;
Default Pin length is 0.170”;
Default OTP and output OVP, OCP mode is auto-restart.
For different option, please refer to part numbering system above or contact your local sales office.
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: [email protected]
Europe:
Telephone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 x 6220
Fax: +886 3 4513485
Email: [email protected]
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_E48SB9R625_01232007
11