E48SC12025 - Delta Electronics

E48SC12025
300W DC/DC Power Modules
FEATURES

Input voltage range: 36V~75V

Output voltage range ( trim and PMBUS)
8V~13.2V

High efficiency : 95.0% @- 48Vin/25A

Size:
58.4mm x 22.8mm x 11.0mm
(2.3” x 0.9” x 0.43”)(W/O heat-spreader)
58.4mm x 22.8mm x 12.7mm
(2.3” x 0.9” x 0.5”)(with heat-spreader)

Industry standard DOSA compliant pin out

Fully protected: Input UVLO, Output OCP and
OVP, OTP

1500V isolation

No minimum load required

Fixed frequency operation

ISO 9001, TL 9000, ISO 14001, QS9000,

OHSAS18001 certified manufacturing facility
UL/CUL 60950-1 (US & Canada) Recognized
Delphi Series E48SC12025, Eighth Brick Family
DC/DC Power Modules:
36~75Vin, 12Vout, 300W
OPTIONS

Positive or Negative On/Off logic
The Delphi series E48SC12025, eighth brick, 36~75V input,

Open Frame / With heat-spreader option
single output 12V, are full digital control DC/DC converter, and are

Digital PMBus interface option
the latest offering from a world leader in power system and
technology and manufacturing ― Delta Electronics, Inc. This
product provides up to 300 watts of power at 36~75V input in an
industry standard, DOSA compliant footprint and pin out. The
E48SC12025 offers more than 95.0% high efficiency at 48V input,
APPLICATIONS
12V output and 25A load. There is a built-in digital PWM controller

Datacom / Networking
in the E48SC12025 series, which is used to complete the Vo

Wireless Networks
feedback, PWM signal generation, fault protection, output voltage

Optical Network Equipment
trim, on/off control and PMBUS communications, and so on. With

Server and Data Storage
the digital control, many design and application flexibility, advanced
performance, and reliability are obtained.

Industrial / Testing Equipment
Datasheet
DS_E48SC12025_05292015
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P1
TECHNICAL SPECIFICATIONS
PARAMETER
NOTES and CONDITIONS
E48SC12025
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Output negative voltage
Operating ambient Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
(Adjustable via PMBus, VIN_ON)
Turn-Off Voltage Threshold
(Adjustable via PMBus, VIN_OFF)
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Input Capacitance
Inrush Current (I2t)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
(Adjustable via PMBus)
Output Voltage Regulation
Over Line
Over Load
Over tempearture
Total output voltage Range
Output Over-Voltage Lockout
(Adjustable via PMBus, VOUT_OV_FAULT_LIMIT)
Output Capacitance
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output Over Current Protection(hiccup mode)
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
(Adjustable via PMBus)
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Output voltage Rise Time
EFFICIENCY
100% Load
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Current (for both remote on/off logic)
GENERAL SPECIFICATIONS
MTBF
Weight
Weight
Typ.
0
100ms
-40
-55
36
48
34
31
Max.
Units
75
100
0.3
85
125
1500
Vdc
Vdc
V
°C
°C
Vdc
75
Vdc
36
Vdc
34
Vdc
2
25A Load, 36Vin
Vin=48V
Vin=48V
10
120
30
60
10
100
1
P-P thru 12µH inductor, 5Hz to 20MHz
120Hz
Vin=48V, Io=0A , Ta=25°C
Vin=36V to 75V, Io=100% load
Vin=36V to 75V, Io=Io,min to Io,max
Vin=36V to 75V, Io=100% load, Ta= -40C to 85C
Trim and PMBUS, trim up at Vin>44V
25
50
11.88
12
12.12
±48
±48
±108
13.20
8.00
15.2
0
Vin=48V, Full load, 20MHz bandwidth
Co= 220uF/16V (polymer ) + 10u/16V (Tantalum Capacitor)
+1u/16V (Ceramic )
Co= 220uF/16V (polymer ) + 10u/16V (Tantalum Capacitor)
+1u/16V (Ceramic )
Vin=36V to 75V
Output Voltage 10% Low
Vin=48V, Load Slew rate 0.1A/µs with a 1uF ceramic ,
a 10uF tantalum, and a 220uF polymer capacitor
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
mV
mV
mV
Vdc
µF
mV
40
32
Vdc
Vdc
10000
90
0
27.5
Vdc
A
mA
mA
uF
A2S
mA
dB
mV
25
35
A
A
300
-300
500
mV
mV
µs
From On/off to 90%Vo final value
From Input to 90%Vo final value
From 10%Vo final value to 90%Vo final value
40
55
20
ms
ms
ms
Vin=36V
Vin=48V
Vin=48V
95.0
95.0
95.7
%
%
%
1500
6900
Vdc
MΩ
pF
175
KHz
10
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
0
4.0
0.8
9
0.5
V
V
mA
Io=80% of Io max; Ta=25°C; Airflow=300LFM
2.3
M
hours
Without heat-spreader
32.6
grams
With heat-spreader
40.4
grams
Refer to Figure 20 for Hot spot 1 location
Over-Temperature Shutdown ( Without heat spreader)
127
°C
(48Vin,80% Io, 200LFM,Airflow from Vin- to Vin+)
Refer to Figure 22 for Hot spot 2 location
Over-Temperature Shutdown (With heat spreader)
112
°C
(48Vin,80% Io, 200LFM,Airflow from Vin- to Vin+)
Over-Temperature Shutdown ( NTC resistor )
Refer to Figure 20 for NTC resistor location
125
°C
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference. And the OTP is Adjustable via PMBus.
TA=25°C, airflow rate=400 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
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P2
DIGITAL INTERFACE SPECIFICATIONS
PARAMETER
NOTES and CONDITIONS
E48SC12025
Min.
PMBUS SIGNAL INTERFACE CHARACTERISTICS
Input High Voltage (CLK, DATA)
Input Low Voltage (CLK, DATA)
Input high level current (CLK, DATA)
Input low level current (CLK, DATA)
Output Low Voltage (SMBALERT#)
Output high level open drain leakage current
(SMBALERT#)
PMBus Operating frequency range
Typ.
2.1
0
-10
-10
IOUT=2mA
VOUT=3.6V
Max.
Units
3.6
0.8
10
10
0.4
Vdc
Vdc
uA
uA
Vdc
0
10
uA
100
400
kHz
-5
-1.4
+4
2.7
%
A
%
Vdc
°C
°C
Measurement System Characteristics
Output current reading accuracy
Output current reading accuracy
VOUT reading accuracy
VIN reading accuracy
Temperature sense range
Temperature reading accuracy
5A<IOUT<25A
0.56A<IOUT<5A
1
-2
0
-5
+2
+5
(TA=25°C, airflow rate=400 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PIN DEFINATION
Pin#
1
Name
Function
VIN(+)
Primary on/off
control pin
Pin#
Name
Function
7
C2
PGOOD pin, and this pin also could be configurated as secondary on/off control pin
8
SIG_GND
Signal ground
PMBus data line
2
ON/OFF
3
VIN(-)
9
DATA
4
VOUT(-)
10
SMBALERT PMBus SMBAlert line
5
TRIM
11
CLOCK
PMBus clock line
6
VOUT(+)
12
ADDR1
ADDR1 pin sets the high order digit of the address.
13
ADDR0
ADDR0 pin sets the low order digit of the address.
Trim note 1
Note1: see the last page.
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P3
SIMPLIFIED APPLICATION CIRCUIT
Delta DC/DC
Module
EMI filter
ON/OFF
TRIM
Reverse voltage
CLOCK
Load
VOUT(-)
VIn(-)
protect
Resistance of trace
VOUT(+)
VIN(+)
Fuse
Input source
ADDR0 ADDR1
SMB-ALERT
C2
DATA
Resistance of trace
On/off control
CLK
DATA
ALERT PGOOD / ON/OFF
System MCU
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P4
ELECTRICAL CHARACTERISTICS CURVES
98
24
96
22
20
94
75V
18
POWER DISSIPATION (W)
92
EFFICIENCY(%)
75V
48V
36V
90
88
86
48V
16
14
36V
12
10
8
84
6
82
4
80
2
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
OUTPUT CURRENT (A)
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
OUTPUT CURRENT(A)
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.
12.000
10.000
INPUT CURRENT(A)
8.000
6.000
4.000
2.000
0.000
25
30
35
40
45
50
55
60
65
70
75
INPUT VOLTAGE(V)
Figure 3: Typical full load input characteristics at room
temperature.
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P5
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote ON/OFF Logic
Figure 4: Turn-on transient at zero load current) (20ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div.
Figure 5: Turn-on transient at full rated load current
(20ms/div). Top Trace: Vout:5V/div; Bottom Trace: ON/OFF
input:5V/div.
For Input Voltage Start up
Figure 6: Turn-on transient at zero load current (20 ms/div).
Top Trace: Vout; 5V/div; Bottom Trace: input voltage: 30V/div.
DS_E48SC12025_05292015
Figure 7: Turn-on transient at full rated load current (20
ms/div). Top Trace: Vout; 5V/div; Bottom Trace: input voltage:
30V/div.
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P6
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 0.1A/µs, Vin=48V). Load
cap:220µF, electrolytic capacitor ; 10µF, tantalum capacitor and
1µF ceramic capacitor. Top Trace: Vout (200mV/div, 200us/div);
Bottom Trace: Io (10A/div, 200us/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, Vin=48V). Load
cap: 220µF, electrolytic capacitor ;10µF, tantalum capacitor and
1µF ceramic capacitor. Top Trace: Vout (200mV/div, 200us/div);
Bottom Trace: Io (10A/div, 200us/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 100µF electrolytic capacitor (1A/div,2us/div).
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P7
ELECTRICAL CHARACTERISTICS CURVES
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load current
(20mA/div,2us/div).
Figure 13: Output voltage noise and ripple measurement test
setup.
14
OUTPUT VOLTAGE(V)
12
10
8
6
4
2
0
0
5
10
15
20
25
30
35
40
OUTPUT CURRENT(A)
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=25A)(50 mV/div, 2us/div)
Loadcapacitance:220uF(Electrolytic)+10uF(Tantalum)+1uF(Ce
ramic) and min Co. Bandwidth: 20 MHz.
DS_E48SC12025_05292015
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
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P8
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 100μF electrolytic
capacitor (ESR < 0.2 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. Below is the reference
design for an input filter and tested result which can
meet class B in CISSPR 22.
Schematic:
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., UL60950-1, CSA C22.2 NO.
60950-1 2nd, IEC 60950-1 2nd : 2005,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.
When the input source is SELV, 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.

One Vout pin is grounded.

A SELV reliability test is conducted on the system
where the module is used, in combination with the
module, to ensure 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:
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 20A 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
25C, 48Vin, full load, Green line is average peak
mode and blue line is quasi mode.
DS_E48SC12025_05292015
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.
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P9
FEATURES DESCRIPTIONS
Over-Power Protection
The modules include an internal output over-power
protection circuit, which will endure power limiting for an
unlimited duration during output overload. If the output
current exceeds the OCP set points, the modules will
automatically shut down (hiccup mode).
The modules will try to restart after shutdown. If the
overload condition still exists, the modules will shut down
again. This restart trial will continue until the overload
condition is corrected.
The OCP function could be changed via PMBUS. The
commond
related
to
OCP
function
are
IOUT_OC_WARN_LIMIT, IOUT_OC_FAULT_LIMIT and
IOUT_OC_ FAULT _RESPONSE.
Output Overvoltage Protection
The module can detect and respond to output
overvoltage conditions. If the overvoltage condition
causes the output voltage to rise above the limit in the
Specifications Table, the module will shut down.
The modules will try to restart after shutdown. If fault
condition still exists, the modules will shut down again.
This restart trial will continue until the fault condition is
corrected.
The Vo OVP function could be changed via PMBUS.
The commond related to Vo OVP function are
VOUT_OV_WARN_LIMIT, VOUT_OV_FAULT_LIMIT
and VOUT_OV_ FAULT _RESPONSE.
Input Over Voltage Lockout
Over-Temperature Protection
The module can detect and respond to input
overvoltage conditions. If the input voltage rises above
the limit in the Specifications Table, the module will shut
down.
The over-temperature protection consists of circuitry that
provides protection from thermal damage. If the
temperature exceeds the over-temperature threshold, the
modules will shut down, and enter the auto-restart mode.
The module is factory default configured for auto-restart
operation. The auto-restart feature continually monitors
the input voltage and will restart the module when the
level falls 6V below the Input OVP level.
For auto-restart mode, the module will monitor the
module temperature after shutdown. Once the
temperature of module is decreased by an OTP
hysteresis, the module will restart.
The Vin OVP function could be changed via PMBUS.
The commond related to Vin OVP function are
VIN_OV_FAULT_LIMIT and
VIN_OV_FAULT_RESPONSE
The OTP function could be changed via PMBUS. The
commond related to OTP function are OT _WARN_LIMIT,
OT_FAULT_LIMIT and OT_FAULT _RESPONSE.
Remote ON/OFF (ENABLE)
Input Under Voltage Lockout
When Vin exceeds Vin turn on threshold, the module
output is enabled, when Vin falls below Vin turn off
threshold, the module output is disabled. Vin turn on
threshold and Vin turn off threshold can be reconfigured
via the PMBus interface.
The remote ON/OFF (ENABLE) feature on the module
is negative logic. The low logic turns the modules on.
And the high logic, or floating, turns the modules off.
Remote ON/OFF (ENABLE) can be controlled by an
external switch between the on/off terminal and the
Vin(-) terminal. The switch can be an open collector or
open drain.
The Vin UVP function could be changed via PMBUS. The
commond related to Vin UVP function are VIN_ON and
VIN_OFF.
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P10
For the negative logic, if the remote ON/OFF
(ENABLE) feature is not used, please maintain the
ENABLE pin to Vin(-).
Vin+
Vo+
ENABLE
R
load
Vin-
Vo-
Figure 16: Remote ON/OFF (ENABLE) implementation
Secondary Remote On/Off
Reference to the Vo(-) terminal, there is a C2 pin. The
default configuration is set to PGOOD function. And
such pin can be reconfigured as secondary remote
on/off pin by the PMBus interface including 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. The secondary remote
on/off can be controlled by an external switch between
the on/off terminal and the Vo(-) terminal. The switch
can be an open collector or open drain.
Figure 17: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the
TRIM and Vo (-) pins, the output voltage set point
decreases (Fig. 17). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
 511

Rtrim _ down  
 10.2K


Ex. When Trim-down -10% (12V×0.9=10.8V)
 511

Rtrim _ down  
 10.2K  40.9K
 10

MFR_C1_C2_ARA_CONFIG,
MFR_ C2_LOGIC,
MFR_PGOOD_POLARITY are used to config C2 pin
function.
Configurable Control Pins
The module contains one configurable control pins C2,
referenced to the module secondary SIG_GND. See
Mechanical Views for pin locations. The following table
list the default factory configurations for the functions
assigned to the pin.
Pin
Designation/Function
C2
Configuration
Power Good
On/Off
Factory Default
Optional Vias PMBUS
Output Voltage Adjustment (TRIM) note1
To increase or decrease the output voltage set point,
connect an external resistor between the TRIM pin
and either the Vo(+) or Vo(-). The TRIM pin should be
left open if this feature is not used.
DS_E48SC12025_05292015
Figure 18: Circuit configuration for trim-up (increase
output voltage)
If the external resistor is connected between the
TRIM and Vo (+) the output voltage set point
increases (Fig.18) 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% (12V×1.1=13.2V)
Rtrim _ up 
5.11  12  (100  10) 511

 10.2  489.3K
1.225  10
10
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P11
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
Note1: see the last page.
Power Good, PG
The module provides a Power Good (PG) signal which
is provided by the IC inside module, voltage level 3.3V,
to indicate that the output voltage is within the normal
output voltage range of the power module. The PG
signal will be de-asserted to a low state if any
condition such as overtemperature, overcurrent or
loss of regulation occurs that would result in the output
voltage going below the normal voltage range value.
The Vin PG function could be changed via PMBUS.
The commond related to Vin OVP function are
POWER_GOOD_ON and POWER_GOOD_OFF.
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P12
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.
THERMAL CURVES
(WITHOUT HEAT SPREADER)
NTC RESISTOR
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 185mmX185mm,70μm (2Oz),6 layers 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
HOT SPOT 1
AIRFLOW
Figure 20: * Hot spot 1& NTC resistor temperature measured
points, the allowed maximum hot spot 1 temperature is defined
at 117℃.
E48SC12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
Output Current(A)
25
600LFM
500LFM
400LFM
20
15
Natural
Convection
MODULE
100LFM
10
200LFM
300LFM
5
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
0
50.8(2.00")
25
AIR FLOW
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 21: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin- to
Vin+,without heat spreader)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 19: 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_E48SC12025_05292015
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P13
THERMAL CURVES
DIGITAL FEATURE DESCRIPTIONS
(WITH HEAT SPREADER)
The module has a digital PMBus interface to allow the
module to be monitored, controlled and configured by
the system. The module supports 4 PMBus signal
lines, Data, Clock, SMBALERT (optional), Control (C2
pin, optional), and 2 Address line Addr0 and Addr1.
More detail PMBus information can be found in the
PMB Power Management Protocol Specification, Part I
and part II, revision 1.2; which is shown in
http://pmbus.org . Both 100kHz and 400kHz bus
speeds are supported by the module. Connection for
the PMBus interface should be following the High
Power DC specifications given in section 3.1.3 in the
SMBus specification V2.0 or the Low Power DC
specifications in section 3.1.2. The complete SMBus
specification is shown in http://smbus.org.
HOT SPOT 2
AIRFLOW
Figure 22: * Hot spot 2 temperature measured point, the
allowed maximum hot spot 2 temperature is defined at 100℃
Output Current(A)
E48SC12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation,With Heat Spreader)
600LFM
25
500LFM
20
Natural
Convection
15
100LFM
The module supports the Packet Error Checking (PEC)
protocol. It can check the PEC byte provided by the
PMBus master, and include a PEC byte in all message
responses to the master. And the module also can
communicate with the master that does not implement
the PEC mechanism.
SMBALERT protocol is also supported by the module.
SMBALERT line is also a wired-AND signal; by which
the module can alert the PMBUS master via pulling the
SMBALERT pin to an active low. There are only one
way that the master and the module response to the
alert of SMBALERT line.
200LFM
10
300LFM
5
400LFM
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 23: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vinto Vin+, with heat spreader)
DS_E48SC12025_05292015
This way is for the module used in a system that does
not support Alert Response Address (ARA). The
module is to retain it’s resistor programmed address,
when it is in an ALERT active condition. The master will
communicate with the slave module using the
programmed address, and using the various
READ_STATUS commands to find who cause for the
SMBALERT. The CLEAR_FAULTS command will clear
the SMBALERT.
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P14
The module contains a data flash used to store
configuration settings, which will not be programmed
into the device data flash automatically. The
STORE_DEFAULT_ALL command must be used to
commit the current settings are transfer from RAM to
data flash as device defaults.
PMBUS Addressing
The Module has flexible PMBUS addressing capability.
When connect different resistor from Addr0 and Addr1
pin to GND pin, 64 possible addresses can be
acquired. The address is in the form of octal digits;
Each pin offer one octal digit, and then combine
together to form the decimal address as shown in
below.
Address = 8 * ADDR1 + ADDR0
Octal
Resistor(Koh
digit
m)
0
10
1
15.4
2
23.7
3
36.5
4
54.9
5
84.5
6
130
7
200
PMBus Data Format
The module receives and report date in LINEAR
format. The Exponent of the data words is fixed at a
reasonable value for the command; altering the
exponent is not supported. DIRECT format is not
supported by the module.
Corresponded to each octal digit, the requested
resistor values are shown in below, and +/-1% resistors
accuracy can be accepted. If there is any resistances
exceeding the requested range, address 127 will be
return. 0-12 and 40, 44, 45, and 55 in decimal address
can’t be used, since they are reserved according to the
SMBus specifications, and which will also return
address 127.
For commands that set or report any voltage
thresholds related to the output voltage, the module
supports the linear data format consisting of a two byte
value with a 16-bit, unsigned mantissa, and a fixed
exponent of -12. The format of the two data bytes is
shown below:
The equation can be written as:
(-12)
Vout = Mantissa x 2
For example, considering set Vout to 12V by
VOUT_COMMAND, the read/write data can be
calculated refer to below process:
(-12)
Mantissa =Vout/2
= 12/2
(-12)
=49152;
Converter the calculated Mantissa to hexadecimal
0xC000.
DS_E48SC12025_05292015
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P15
For commands that set or report all other thresholds,
including input voltages, output current, temperature,
time and frequency, the supported linear data format is
a two byte value with: an 11 bit, two’s complement
mantissa , and a 5 bit, two’s complement exponent
(scaling factor).The format of the two data bytes is
shown as in below.
The equation can be written as:
(exponent)
Value = Mantissa x 2
For example, considering set the turn on threshold of
input under voltage lockout to 34V by VIN_ON
command; the read/write data can be calculated refer
to below process:
Get the exponent of Vin, -3; whose binary is 11101
(-3)
(-3)
Mantissa =Vin/2 =34/2 =272;
Converter the calculated Mantissa to hexadecimal 110,
then converter to binary 00100010000;Combine the
exponent and the mantissa, 11101 and 00100010000;
Converter binary 1110100100010000 to hexadecimal
E910.
DS_E48SC12025_05292015
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P16
SUPPORTED PMBUS COMMANDS
The main PMBus commands described in the PMBus 1.2 specification are supported by the module. Partial
PMBus commands are fully supported; Partial PMBus commands have difference with the definition in PMBus
1.2 specification. All the supported PMBus commands are detail summarized in below table
Transf Compatible with
Command
Command
Command
Data
-er
Code
Default Range Data Expon
standard
description
type
PMBUS or not?
R/W
Refer to below
byte
description;
Note
Format
value
limit
units
-ent
Bit field
0x80
/
/
/
Turn the module on or
OPERATION
0x01
off by PMBUS
/
command
Configures the
combination of
ON_OFF_CONFIG
0x1D
Read
0x02
(Neg Logic);
Yes
primary on/off pin and
Bit field
0x1D
/
/
/
byte
0x1F
PMBUS command
CLEAR_FAULTS
(Pos Logic);
Clear any fault bits
Send
that have been set
byte
0x03
Yes
/
/
/
/
/
/
This command is
Stores operating
effective to the
Send
STORE_DEFAULT_ALL
0x11
parameters from RAM
Yes
/
/
/
/
/
parameter of all
byte
to data flash
command in this
table.
This command can't
Restores operating
Send
RESTORE_DEFAULT_ALL
0x12
parameters from data
be issued when the
Yes
/
/
/
/
/
byte
power unit is
flash to RAM
running.
Read
VOUT_MODE
0x20
Read Vo data format
Yes
mode+exp
0x14
Yes
Vout Linear
12
/
/
/
/
Volts
-12
/
byte
Set the output voltage
VOUT_COMMAND
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
FREQUENCY_SWITCH
normal value
word
Set the output voltage
R/W
margin high value
word
Set the output voltage
R/W
margin low value
word
Set the switching
R/W
0x25
0x26
0x33
8
~13.2
Yes
Vout Linear
12.6
<13.0
Volts
-12
/
Yes
Vout Linear
11.4
>10.2
Volts
-12
/
KHz
-2
/
Frequency
Yes
frequency
DS_E48SC12025_05292015
R/W
0x21
word
140 ~
145
linear
180
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P17
Compatible
Transf
with
-er
standard
Command
Command
Data
Command description
Code
Note
Format
type
Default Range Data Expon
value
limit
units
-ent
35
33~36
V
-3
PMBUS or
not?
Set the turn on voltage
R/W
VIN_ON
0x35
threshold of Vin under
Vin
Yes
word
VIN_ON should be higher than
Linear
VIN_OFF
voltage lockout
Set the turn off voltage
R/W
VIN_OFF
0x36
threshold of Vin under
Vin
Yes
VIN_ON should be higher than
33
word
Linear
R/W
Vout
31~34
V
-3
VIN_OFF
voltage lockout
Set the output
VOUT_OV_FAULT_L
0x40
Must be higher than the value
overvoltage fault
IMIT
Yes
word
15
11~16
V
-12
of VOUT_COMMAND
and
Linear
threshold.
VOUT_OV_WARN_LIMIT;
Instructs what action to
VOUT_OV_FAULT_
Read Refer to below
0x41
take in response to an
RESPONSE
Bit field
byte
0xB8
/
N/A
/
/
description;
output overvoltage fault.
Set a threshold causing
VOUT_OV_WARN_L
Must be the same or less than
R/W
0x42
an output voltage high
IMIT
Vout
Yes
word
15
11~16
V
-12
VOUT_OV_FAULT_LIMIT
Linear
warning.
value
Must be greater than
IOUT_OC_FAULT_LI
Set the output overcurrent
R/W
fault threshold.
word
0x46
MIT
Iout
Yes
32
20~35
A
-4
IOUT_OC_WARN_LIMIT
Linear
value
Instructs what action to
IOUT_OC_FAULT_R
Read Refer to below
0x47
take in response to an
ESPONSE
Bit field
byte
0xF8
/
N/A
/
/
description;
output overcurrent fault.
Set a threshold causing
IOUT_OC_WARN_LI
Must be less than
R/W
0x4A
an output current high
MIT
Iout
Yes
word
27
20~35
A
-4
warning.
Set the over temperature
OT_FAULT_LIMIT
value
R/W
0x4F
TEMP
Yes
fault threshold.
IOUT_OC_FAULT_LIMIT
Linear
word
25~14 Deg.
125
Linear
Must be greater than
-2
0
C
/
N/A
OT_WARN_LIMIT value
Instructs what action to
OT_FAULT_RESPO
Read Refer to below
0x50
take in response to an
NSE
Bit field
byte
0x80
/
/
description;
over temperature fault.
DS_E48SC12025_05292015
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P18
Compatible with
Comman
Command
Transf
Command description
d Code
Data
Default
Range
Data
Expon
Format
value
limit
units
-ent
standard
-er type
Note
PMBUS or not?
Must be less
OT_WARN_
Set a threshold causing a
0x51
LIMIT
TEMP
R/W word
Yes
temperature high warning.
than
100
25~140
Deg.C
-2
Linear
OT_FAULT_LI
MIT value
VIN_OV_FA
Set the input overvoltage fault
0x55
Vin
R/W word
ULT_LIMIT
threshold.
VIN_OV_FA
Instructs what action to take in
Yes
110
48~110
V
-3
/
0XC0
/
N/A
/
/
Linear
Refer to below
ULT_RESPO
0x56
response to an input
Read byte
Bit field
description;
NSE
overvoltage fault.
Must be greater
Sets the output voltage at which
POWER_GO
Vout
0x5E
the bit 3 of STATUS_WORD
R/W word
Yes
OD_ON
8
11
Linear
than
V
-12
~13.2
POWER_GOO
high byte should be asserted.
D_OFF value
Must be less
Sets the output voltage at which
POWER_GO
Vout
0x5F
the bit 3 of STATUS_WORD
R/W word
Yes
OD_OFF
8
9
Linear
than
V
-12
~13.2
POWER_GOO
high byte should be negated.
D_ON value
Sets the time from a start
Time
TON_DELAY
0x60
condition is received until the
R/W word
Yes
20
5~500
ms
-1
/
20
15~500
ms
-1
/
Bit field
/
/
/
/
/
Bit field
/
/
/
/
/
Bit field
/
/
/
/
/
Linear
output voltage starts to rise
Sets the time from the output
Time
TON_RISE
0x61
starts to rise until the voltage
R/W word
Yes
Linear
has entered the regulation band.
Returns the information with a
STATUS_W
0x79
Read
Refer to below
word
description;
summary of the module's
ORD
fault/warning
Returns the information of the
STATUS_VO
Refer to below
0x7A
module's output voltage related Read byte
UT
description;
fault/warning
Returns the information of the
STATUS_IO
Refer to below
0x7B
module's output current related
UT
Read byte
description;
fault/warning
DS_E48SC12025_05292015
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P19
Compatible with
Comman
Command
Transf
Command description
d Code
Data
Default
Range
Data
Expon
Format
value
limit
units
-ent
Bit field
/
/
/
/
/
Bit field
/
/
/
/
/
Bit field
/
/
/
/
/
/
/
V
-3
/
/
/
V
-12
/
/
/
A
-4
/
/
/
Deg.C
-2
/
Bit field
0x12
/
/
/
/
Bit field
0x00
/
/
/
/
Bit field
0x00
/
/
/
/
Bit field
0x01
/
/
/
/
standard
-er type
Note
PMBUS or not?
Returns the information of the
STATUS_IN
Refer to below
0x7C
module's input over voltage and Read byte
PUT
description;
under voltage fault
STATUS_TE
Returns the information of the
Refer to below
MPERATUR
0x7D
module's temperature related
Read byte
description;
E
fault/warning
Returns the information of the
STATUS_CM
Refer to below
0x7E
module's communication related Read byte
L
description;
faults.
Returns the input voltage of the
READ_VIN
Read
0x88
READ_VOU
module
word
Returns the output voltage of
Read
0x8B
T
READ_IOUT
Vin
Yes
Linear
Vout
Yes
the module
word
Returns the output current of the
Read
0x8C
Linear
Iout
Yes
module
word
Returns the module's hot spot
Read
Linear
READ_TEM
PERATURE_
0x8D
TEMP
Yes
temperature of the module
word
Linear
1
PMBUS_RE
Reads the revision of the
0x98
VISION
Read byte
Yes
PMBus
MFR_C1_C2
Refer to below
_ARA_CONF
0xE0
Config C2 pin function
R/W byte
description;
IG
MFR_ C2_
Refer to below
0xE1
Config C2 pin logic
R/W byte
Configure
description;
MFR_PGOO
0xE2
D
Refer to below
Config Power Good logic
R/W byte
description;
_POLARITY
Total 11
MFR_SERIA
Read
0x9E
Reads the SN of module
L
ASCII
‘xxxxxxxxx
/
block
of module use
/
charact
ers
DS_E48SC12025_05292015
The SN number
xx’
/
/
11 ASCII
characters
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P20
OPERATION [0x01]
Bit number
7:
Purpose
Enable/Disable the module
6:
Reserved
5:4
Margins
3:0
Bit Value
Meaning
1
Output is enabled
0
Output is disabled
Default
Settings,
0x80
1
0
00
No margin
00
01
Margin low(Act on Fault)
10
Margin high(Act on Fault)
Reserved
0000
VOUT_OV_FAULT_RESPONSE [0x41]
Bit number
7:6
Purpose
Response settings
Bit Value
Meaning
Default
Settings,
0xB8
10
Unit shuts down and responds according to the
10
retry settings
5:3
Retry setting
111
Unit continuously restarts while fault is present
111
until commanded off
2:0
Delay time setting
000
Unit does not attempt to restart on fault
000
No delay supported
000
IOUT_OC_FAULT_RESPONSE [0x47]
Bit number
7:6
Purpose
Response settings
Bit Value
11
Default
Settings, 0xF8
Meaning
Unit shuts down and responds according to the
11,
retry settings
5:3
Retry settings
111
Unit continuously restarts while fault is present
111
until commanded off
2:0
Delay time setting
000
Unit does not attempt to restart on fault
000
No delay supported
000
OT_FAULT_RESPONSE [0x50]
Bit number
Purpose
Bit Value
7:6
Response settings
10
5:3
Retry settings
111
Default
Meaning
Settings, 0x80
Unit shuts down and responds according to the
10,
retry settings
Unit continuously restarts while fault is present
000
until commanded off
2:0
Delay time setting
DS_E48SC12025_05292015
000
Unit does not attempt to restart on fault
000
No delay supported
000
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P21
VIN_OV_FAULT_RESPONSE [0x56]
Bit number
7:6
Purpose
Response settings
Bit Value
Meaning
Default
Settings,0xC0
11
Unit shuts down and responds according to the
11
retry settings
5:3
Retry setting
111
Unit continuously restarts while fault is present
000
until commanded off
2:0
Delay time setting
000
Unit does not attempt to restart on fault
000
No delay supported
000
STATUS_WORD [0x79]
High byte
Bit number
7
6
5
Purpose
An output over voltage fault or warning
Meaning
1
Occurred
0
No Occurred
1
Occurred
0
No Occurred
An input voltage fault, including over voltage and
1
Occurred
undervoltage
0
No Occurred
1
is negated
0
ok
An output over current fault or warning
4
Reserved
3
Power_Good
2:0
Bit Value
Reserved
Low byte
Bit number
Purpose
7
Reserved
6
OFF (The unit is not providing power to the output,
regardless of the reason)
5
4
An output over voltage fault
An output over current fault
3
An input under voltage fault
2
A temperature fault or warning
1
0
CML (A communications, memory or logic fault)
Bit Value
Meaning
1
Occurred
0
No Occurred
1
Occurred
0
No Occurred
1
Occurred
0
No Occurred
1
Occurred
0
No Occurred
1
Occurred
0
No Occurred
1
Occurred;
0
No Occurred
Reserved
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P22
STATUS_VOUT [0x7A]
Bit number
7
6
5:0
Purpose
Output over voltage fault
Output over voltage warning
Bit Value
Meaning
1
Occurred;
0
No Occurred
1
Occurred;
0
No Occurred
Reserved
STATUS_IOUT [0x7B]
Bit number
Purpose
7
Output over current fault
6
Reserved
5
Output over current warning
4:0
Bit Value
Meaning
1
Occurred;
0
No Occurred
1
Occurred;
0
No Occurred
Reserved
STATUS_INPUT [0x7C]
Bit number
7
6: 5
4
3:0
Purpose
Input over voltage fault
Bit Value
Meaning
1
Occurred;
0
No Occurred
1
Occurred;
0
No Occurred
Reserved
Input under voltage fault
Reserved
STATUS_TEMPERATURE [0x7D]
Bit number
7
6
5:0
Purpose
Over temperature fault
Over temperature warning
Bit Value
Meaning
1
Occurred;
0
No Occurred
1
Occurred;
0
No Occurred
Reserved
STATUS_CML [0x7E]
Bit number
7
6
5
4:0
Purpose
Invalid/Unsupported Command Received
Invalid/Unsupported Data Received
Packet Error Check Failed
Bit Value
Meaning
1
Occurred;
0
No Occurred
1
Occurred;
0
No Occurred
1
Occurred;
0
No Occurred
Reserved
DS_E48SC12025_05292015
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P23
MFR_C1_C2_ARA_CONFIG [0xE0]
Bit number
7:5
4
Purpose
Reserved
Bit Value
000
ARA
0
Meaning
Reserved
ARA not functional, module
remains at resistor programmed
address when SMBLAERT is
asserted
3:0
PIN Configuration
0000
C2 pin: POWER_GOOD
0010
C2 pin: ON/OFF (Secondary)
MFR_ C2_Configure [0xE1]
Bit number
7:2
1
Purpose
Reserved
Bit Value
000000
ON/OFF Configuration
0
Meaning
Reserved
Secondary side on/off pin state
when mapped to C2 is ignored
1
AND – Primary and Secondary
side on/off
0
Secondary Side ON/OFF Logic
0
Negative Logic (Low Enable: Input
< 0.8V wrt Vout(-)
1
Positive Logic (High Enable:
Input > 2.0V wrt Vout(-)
MFR_PGOOD_POLARITY [0xE2]
Bit number
7:1
0
Purpose
Reserved
Power Good Logic
DS_E48SC12025_05292015
Bit Value
0000000
Meaning
Reserved
0
Negative PGOOD logic
1
Positive PGOOD logic
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P24
MECHANICAL DRAWING( WITH HEAT-SPREADER)
*For modules with through-hole pins and the optional heat spreader, they are intended for wave
soldering assembly onto system boards, please do not subject such modules through reflow
temperature profile.
DS_E48SC12025_05292015
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P25
MECHANICAL DRAWING (WITHOUT HEAT-SPREADER)
Pin Specification:
Pins 1-3, 5
Pins 4,6
Pins 7-13
DS_E48SC12025_05292015
1.00mm (0.040”) diameter (All pins are copper with matte Tin plating over Nickel under plating)
2. 1.50mm (0.059”) diameter (All pins are copper with matte Tin plating over Nickel under plating)
1. SQ 0.50mm(0.020’’) ( All pins are copper with gold flash plating)
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P26
RECOMMENDED PAD LAYOUT
DS_E48SC12025_05292015
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P27
PART NUMBERING SYSTEM
E
48
Form
Input
S
C
Number Product
Factor Voltage
of
120
Output
25
N
R
Output ON/OFF
Series
Voltage Current
C-
120 - 12V
Logic
F
A
Pin
Option Code
Length
Outputs
E-
48 -
Eighth
36V~75V
S - Single
25A
Series
Brick
PMBUS
pin(7~13pin)
Trim Pin
Heat
spreader
A
Yes
Yes
No
K - 0.110”
B
No
Yes
No
T - 0.220”
C
No
Yes
Yes
D
No
No
No
E
No
No
Yes
H
Yes
Yes
Yes
I
Yes
No
Yes
N-
N - 0.145” F - RoHS 6/6
Negative
R - 0.170”
PPositive
(Lead Free)
MODEL LIST
MODEL NAME
E48SC12025NRFH
INPUT
36V~75V
EFF @
100%LOAD
OUTPUT
10A
12V
25A
95.0%
* For modules with through-hole pins and the optional heatsink, they are intended for wave soldering
assembly onto system boards; please do not subject such modules through reflow temperature profile.
Note1: If use VOUT_COMMAND of PMBUS to trim Vout set point, then the function of trim pin(6 pin) will be disabled
immediately. And if need enable the function of trim pin(6pin) to trim Vout set point again, should turn off and turn on the input
voltage of module to restart module.
CONTACT: www.deltaww.com/dcdc
Email: dcdc@deltaww.com
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
Asia & the rest of world:
Telephone: +886 3 4526107
ext 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.
DS_E48SC12025_05292015
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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