E48SC12025NRFH [DELTA]
300W DC/DC Power Modules;
| 型号： | E48SC12025NRFH |
| 厂家： | 
DELTA ELECTRONICS, INC. |
| 描述： | 300W DC/DC Power Modules |
| 文件： | 总28页 (文件大小：1382K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Open Frame / With heat-spreader option
Digital PMBus interface option
The Delphi series E48SC12025, eighth brick, 36~75V input,
single output 12V, are full digital control DC/DC converter, and are
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,
12V output and 25A load. There is a built-in digital PWM controller
in the E48SC12025 series, which is used to complete the Vo
feedback, PWM signal generation, fault protection, output voltage
trim, on/off control and PMBUS communications, and so on. With
the digital control, many design and application flexibility, advanced
performance, and reliability are obtained.
APPLICATIONS
Datacom / Networking
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial / Testing Equipment
Datasheet
DS_E48SC12025_0516016
E-mail: dcdc@deltaww.com
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P1
TECHNICAL SPECIFICATIONS
PARAMETER
NOTES and CONDITIONS
E48SC12025
Min.
Typ.
Max.
Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Output negative voltage
Operating ambient Temperature
Storage Temperature
0
75
100
0.3
85
125
1500
Vdc
Vdc
V
°C
°C
100ms
-40
-55
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
Vdc
36
48
2
75
Vdc
34
31
36
34
Vdc
Vdc
Vdc
A
mA
mA
uF
A2S
mA
dB
25A Load, 36Vin
Vin=48V
10
120
30
60
10
100
Vin=48V
Inrush Current (I2t)
1
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
(Adjustable via PMBus)
Output Voltage Regulation
Over Line
P-P thru 12µH inductor, 5Hz to 20MHz
120Hz
25
50
Vin=48V, Io=0A , Ta=25°C
11.88
12
12.12
Vdc
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,Vin=36V to 75V, Pout ≦ max rated power,
Io ≦ Io.max
±48
±48
±108
mV
mV
mV
Over Load
Over tempearture
Total output voltage Range
8.00
0
13.20
Vdc
Output Over-Voltage Lockout
(Adjustable via PMBus, VOUT_OV_FAULT_LIMIT)
Output Capacitance
15.2
Vdc
µF
10000
Output Voltage Ripple and Noise
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 )
Peak-to-Peak
RMS
90
40
mV
mV
Operating Output Current Range
Output Over Current Protection(hiccup mode)
DYNAMIC CHARACTERISTICS
Vin=36V to 75V
Output Voltage 10% Low
0
27.5
25
35
A
A
32
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
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
300
-300
500
mV
mV
µs
75% Io.max to 50% Io.max
(Adjustable via PMBus)
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Output voltage Rise Time
EFFICIENCY
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
100% Load
100% Load
60% Load
Vin=36V
Vin=48V
Vin=48V
95.0
95.0
95.7
%
%
%
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
1500
182
Vdc
MΩ
pF
10
6900
175
168
KHz
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Current (for both remote on/off logic)
GENERAL SPECIFICATIONS
MTBF
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
Without heat-spreader
2.3
32.6
40.4
M
grams
grams
Weight
Weight
With heat-spreader
Refer to Figure 20 for Hot spot 1 location
(48Vin,80% Io, 200LFM,Airflow from Vin- to Vin+)
Refer to Figure 22 for Hot spot 2 location
(48Vin,80% Io, 200LFM,Airflow from Vin- to Vin+)
Refer to Figure 20 for NTC resistor location
Over-Temperature Shutdown ( Without heat spreader)
127
°C
Over-Temperature Shutdown (With heat spreader)
Over-Temperature Shutdown ( NTC resistor )
112
125
°C
°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.
DS_E48SC12025_05162016
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P2
TA=25°C, airflow rate=400 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
DIGITAL INTERFACE SPECIFICATIONS
PARAMETER
NOTES and CONDITIONS
E48SC12025
Min.
Typ.
Max.
Units
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#)
2.1
0
-10
-10
3.6
0.8
10
10
0.4
Vdc
Vdc
uA
uA
Vdc
IOUT=2mA
VOUT=3.6V
0
10
uA
PMBus Operating frequency range
100
400
kHz
Measurement System Characteristics
Output current reading accuracy
Output current reading accuracy
VOUT reading accuracy
5A<IOUT<25A
0.56A<IOUT<5A
-5
-1.4
+4
2.7
%
A
%
1
VIN reading accuracy
Temperature sense range
Temperature reading accuracy
-2
0
-5
+2
+5
Vdc
°C
°C
(TA=25°C, airflow rate=400 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PIN DEFINATION
Pin#
Name
VIN(+)
Function
Pin#
Name
Function
1
7
C2
PGOOD pin, and this pin also could be configurated as secondary on/off control pin
Primary on/off
control pin
2
3
ON/OFF
VIN(-)
8
9
SIG_GND
DATA
Signal ground
PMBus data line
4
5
6
VOUT(-)
TRIM
10
SMBALERT PMBus SMBAlert line
Trim note 1
11
12
13
CLOCK
ADDR1
ADDR0
PMBus clock line
VOUT(+)
ADDR1 pin sets the high order digit of the address.
ADDR0 pin sets the low order digit of the address.
Note1: see the last page.
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P3
SIMPLIFIED APPLICATION CIRCUIT
Delta DC/DC
Module
Resistance of trace
ADDR1
ADDR0
VOUT(+)
VIN(+)
Fuse
ON/OFF
TRIM
Input source
EMI filter
Load
Reverse voltage
protect
VOUT(-)
VIn(-)
Resistance of trace
SMB-ALERT
C2
CLOCK DATA
On/off control
PGOOD / ON/OFF
CLK DATA ALERT
System MCU
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P4
ELECTRICAL CHARACTERISTICS CURVES
98
96
94
24
22
20
18
16
14
12
10
8
75V
75V
92
48V
48V
36V
90
88
86
84
82
80
36V
6
4
2
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
2.5
5
7.5
10
12.5
15
17.5
20
22.5
25
OUTPUT CURRENT (A)
OUTPUT CURRENT(A)
Figure 1: Efficiency vs. load current for minimum, nominal, and
Figure 2: Power loss vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
maximum input voltage at 25°C.
12.000
10.000
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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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.
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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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.
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).
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.
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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
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)
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
Loadcapacitance:220uF(Electrolytic)+10uF(Tantalum)+1uF(Ce
ramic) and min Co. Bandwidth: 20 MHz.
DS_E48SC12025_05162016
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P8
Safety Considerations
DESIGN 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.
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.
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:
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.
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.
Schematic:
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.
The power module has extra-low voltage (ELV) outputs
when all inputs are ELV.
Test result:
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
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.
25C, 48Vin, full load, Green line is average peak
mode and blue line is quasi mode.
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P9
Output Overvoltage Protection
FEATURES DESCRIPTIONS
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.
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 fault
condition still exists, the modules will shut down again.
This restart trial will continue until the fault condition is
corrected.
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 Vo OVP function could be changed via PMBUS.
The command related to Vo OVP function are
VOUT_OV_WARN_LIMIT, VOUT_OV_FAULT_LIMIT
and VOUT_OV_ FAULT _RESPONSE.
The OCP function could be changed via PMBUS. The
command
related
to
OCP
function
are
Input Over Voltage Lockout
IOUT_OC_WARN_LIMIT, IOUT_OC_FAULT_LIMIT and
IOUT_OC_ FAULT _RESPONSE.
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.
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
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 command related to Vin OVP function are
VIN_OV_FAULT_LIMIT and
VIN_OV_FAULT_RESPONSE
The OTP function could be changed via PMBUS. The
command related to OTP function are OT _WARN_LIMIT,
OT_FAULT_LIMIT and OT_FAULT _RESPONSE.
Remote ON/OFF (ENABLE)
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.
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.
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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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
Figure 17: Circuit configuration for trim-down (decrease
output voltage)
Vin-
Vo-
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:
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.
511
Rtrim _ down
10.2
K
Ex. When Trim-down -10% (12V×0.9=10.8V)
511
10
Rtrim _ down
10.2
K
40.9
K
MFR_C1_C2_ARA_CONFIG,
MFR_ C2_LOGIC,
MFR_PGOOD_POLARITY are used to config C2 pin
function.
Configurable Control Pins
Figure 18: Circuit configuration for trim-up (increase
output voltage)
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.
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:
Pin
Designation/Function
Configuration
C2
Power Good
On/Off
Factory Default
Optional Vias PMBUS
5.11Vo (100 ) 511
Rtrim _up
10.2
K
1.225
Output Voltage Adjustment (TRIM) note1
Ex. When Trim-up +10% (12V×1.1=13.2V)
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.
5.1112 (100 10) 511
Rtrim _up
10.2 489.3
K
1.22510
10
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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 command related to Vin OVP function are
POWER_GOOD_ON and POWER_GOOD_OFF.
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P12
THERMAL CONSIDERATIONS
THERMAL CURVES
(WITHOUT HEAT SPREADER)
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.
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.
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℃.
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’’).
E48SC12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation)
25
20
15
10
5
600LFM
500LFM
400LFM
PWB
FANCING PWB
Natural
Convection
100LFM
MODULE
200LFM
300LFM
AIR VELOCITY
0
25
30
35
40
45
50
55
60
65
70
75
80
85
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
Ambient Temperature (℃)
Figure 21: Output current vs. ambient temperature and air
velocity @Vin=48V(Transverse Orientation, airflow from Vin- to
Vin+,without heat spreader)
AIR FLOW
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.
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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
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.
Figure 22: * Hot spot 2 temperature measured point, the
allowed maximum hot spot 2 temperature is defined at 100℃
E48SC12025(Standard) Output Current vs. Ambient Temperature and Air Velocity
Output Current(A)
@Vin = 48V (Transverse Orientation,With Heat Spreader)
25
20
15
10
5
600LFM
500LFM
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.
Natural
Convection
100LFM
200LFM
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.
300LFM
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 Vin-
to Vin+, with heat spreader)
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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.
Octal
digit
Resistor(Koh
m)
0
1
2
3
4
5
6
7
10
15.4
23.7
36.5
54.9
84.5
130
200
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
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.
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:
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.
The equation can be written as:
Vout = Mantissa x 2(-12)
For example, considering set Vout to 12V by
VOUT_COMMAND, the read/write data can be
calculated refer to below process:
Mantissa =Vout/2(-12)= 12/2(-12)=49152;
Converter the calculated Mantissa to hexadecimal
0xC000.
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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:
Value = Mantissa x 2(exponent)
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
Mantissa =Vin/2(-3)=34/2(-3)=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.
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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
Code
Command
Data
Default Range Data Expon
Command
-er
standard
Note
description
Format
value
limit units -ent
type PMBUS or not?
Turn the module on or
off by PMBUS
command
R/W
byte
Refer to below
description;
OPERATION
0x01
Bit field
0x80
/
/
/
/
Configures the
combination of
0x1D
(Neg Logic);
0x1F
Read
ON_OFF_CONFIG
CLEAR_FAULTS
0x02
0x03
Yes
Yes
Bit field
0x1D
/
/
/
/
/
/
primary on/off pin and byte
PMBUS command
(Pos Logic);
Clear any fault bits
that have been set
Send
byte
/
/
/
This command is
effective to the
parameter of all
command in this
table.
Stores operating
parameters from RAM
to data flash
Send
byte
STORE_DEFAULT_ALL
0x11
Yes
/
/
/
/
/
This command can't
be issued when the
power unit is
Restores operating
parameters from data
flash to RAM
Send
byte
RESTORE_DEFAULT_ALL
0x12
Yes
/
/
/
/
/
/
running.
Read
byte
VOUT_MODE
0x20
0x21
0x25
0x26
0x33
Read Vo data format
Yes
Yes
Yes
Yes
Yes
mode+exp
Vout Linear
0x14
12
/
/
/
/
/
/
/
Set the output voltage R/W
normal value word
Set the output voltage R/W
margin high value word
Set the output voltage R/W
8
VOUT_COMMAND
VOUT_MARGIN_HIGH
VOUT_MARGIN_LOW
FREQUENCY_SWITCH
Volts
-12
-12
-12
-2
~13.2
Vout Linear 12.6
Vout Linear 11.4
<13.0 Volts
>10.2 Volts
margin low value
Set the switching
frequency
word
R/W
word
Frequency
145
linear
140 ~
KHz
180
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P17
Compatible
with
Transf
-er
Command
Code
Data Default Range Data Expon
Command
Command description
standard
PMBUS or
not?
Note
Format value
limit units -ent
type
Set the turn on voltage
threshold of Vin under
voltage lockout
R/W
Vin
35
Linear
VIN_ON should be higher than
VIN_OFF
VIN_ON
0x35
0x36
0x40
0x41
0x42
0x46
0x47
Yes
Yes
Yes
33~36
31~34
11~16
/
V
V
-3
-3
word
Set the turn off voltage
threshold of Vin under
voltage lockout
R/W
Vin
33
Linear
VIN_ON should be higher than
VIN_OFF
VIN_OFF
word
Set the output
Must be higher than the value
VOUT_OV_FAULT_L
IMIT
R/W
Vout
15
Linear
overvoltage fault
V
-12 of VOUT_COMMAND and
VOUT_OV_WARN_LIMIT;
word
threshold.
Instructs what action to
take in response to an
output overvoltage fault.
Set a threshold causing
an output voltage high
warning.
VOUT_OV_FAULT_
RESPONSE
Read Refer to below
Bit field 0xB8
N/A
/
/
byte
description;
Must be the same or less than
VOUT_OV_WARN_L
IMIT
R/W
Vout
15
Linear
Yes
11~16
20~35
/
V
-12 VOUT_OV_FAULT_LIMIT
value
word
Must be greater than
-4 IOUT_OC_WARN_LIMIT
value
IOUT_OC_FAULT_LI
MIT
Set the output overcurrent R/W
Iout
32
Linear
Yes
A
fault threshold.
word
Instructs what action to
take in response to an
output overcurrent fault.
Set a threshold causing
an output current high
warning.
IOUT_OC_FAULT_R
ESPONSE
Read Refer to below
Bit field 0xF8
N/A
/
/
byte
description;
Must be less than
IOUT_OC_WARN_LI
MIT
R/W
Iout
27
Linear
0x4A
0x4F
0x50
Yes
20~35
A
-4 IOUT_OC_FAULT_LIMIT
value
word
Set the over temperature R/W
TEMP
125
Linear
25~14 Deg.
Must be greater than
-2
OT_FAULT_LIMIT
Yes
fault threshold.
word
0
C
OT_WARN_LIMIT value
Instructs what action to
take in response to an
over temperature fault.
OT_FAULT_RESPO
NSE
Read Refer to below
Bit field 0x80
/
N/A
/
/
byte
description;
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P18
Compatible with
standard
Comman
d Code
Transf
Data
Default Range
Data
Expon
-ent
Command
Command description
Note
-er type
Format
value
limit
units
PMBUS or not?
Must be less
than
OT_WARN_
LIMIT
Set a threshold causing a
temperature high warning.
TEMP
Linear
0x51
R/W word
Yes
Yes
100
25~140 Deg.C
-2
OT_FAULT_LI
MIT value
VIN_OV_FA
ULT_LIMIT
VIN_OV_FA
ULT_RESPO
NSE
Set the input overvoltage fault
threshold.
Vin
0x55
0x56
R/W word
Read byte
110
48~110
V
-3
/
/
Linear
Instructs what action to take in
response to an input
overvoltage fault.
Refer to below
description;
Bit field
0XC0
/
N/A
/
Must be greater
than
Sets the output voltage at which
the bit 3 of STATUS_WORD
high byte should be asserted.
POWER_GO
OD_ON
Vout
8
0x5E
R/W word
Yes
11
V
-12
Linear
~13.2
POWER_GOO
D_OFF value
Must be less
than
Sets the output voltage at which
the bit 3 of STATUS_WORD
high byte should be negated.
POWER_GO
OD_OFF
Vout
8
0x5F
R/W word
Yes
9
V
-12
Linear
~13.2
POWER_GOO
D_ON value
Sets the time from a start
condition is received until the
output voltage starts to rise
Sets the time from the output
starts to rise until the voltage
has entered the regulation band.
Returns the information with a
summary of the module's
fault/warning
Time
TON_DELAY
TON_RISE
0x60
0x61
0x79
0x7A
0x7B
R/W word
R/W word
Yes
Yes
20
5~500
ms
-1
-1
/
/
/
/
/
/
Linear
Time
20
15~500
ms
Linear
STATUS_W
ORD
Read
word
Refer to below
description;
Bit field
Bit field
Bit field
/
/
/
/
/
/
/
/
/
Returns the information of the
STATUS_VO
UT
Refer to below
description;
module's output voltage related Read byte
fault/warning
/
Returns the information of the
module's output current related Read byte
fault/warning
STATUS_IO
UT
Refer to below
description;
/
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P19
Compatible with
standard
Comman
d Code
Transf
Data
Default Range
Data
Expon
-ent
Command
Command description
Note
-er type
Format
value
limit
units
PMBUS or not?
Returns the information of the
STATUS_IN
PUT
Refer to below
description;
0x7C
0x7D
0x7E
module's input over voltage and Read byte
under voltage fault
Bit field
Bit field
Bit field
/
/
/
/
/
/
/
/
/
/
/
STATUS_TE
MPERATUR
E
Returns the information of the
Refer to below
description;
module's temperature related
fault/warning
Read byte
/
/
/
/
Returns the information of the
STATUS_CM
L
Refer to below
description;
module's communication related Read byte
faults.
Returns the input voltage of the
module
Read
word
Read
word
Read
word
Vin
READ_VIN
0x88
0x8B
0x8C
Yes
Yes
Yes
/
/
/
/
/
/
V
V
A
-3
-12
-4
/
/
/
Linear
Vout
READ_VOU
T
Returns the output voltage of
the module
Linear
Iout
Returns the output current of the
module
READ_IOUT
Linear
READ_TEM
PERATURE_
1
Returns the module's hot spot
temperature of the module
Read
word
TEMP
Linear
0x8D
0x98
0xE0
Yes
Yes
/
/
/
/
/
/
Deg.C
-2
/
/
/
/
/
PMBUS_RE
VISION
Reads the revision of the
PMBus
Read byte
R/W byte
R/W byte
R/W byte
Bit field
Bit field
Bit field
0x12
0x00
0x00
0x01
/
/
/
/
/
MFR_C1_C2
_ARA_CONF
IG
Refer to below
description;
Config C2 pin function
Config C2 pin logic
/
MFR_ C2_
Configure
MFR_PGOO
D
Refer to below
description;
0xE1
0xE2
/
Refer to below
description;
Config Power Good logic
Bit field
/
_POLARITY
Total 11
The SN number
of module use
11 ASCII
MFR_SERIA
L
Read
block
ASCII ‘xxxxxxxxx
0x9E
Reads the SN of module
/
/
/
/
charact
ers
xx’
characters
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P20
OPERATION [0x01]
Bit number
Purpose
Bit Value
Meaning
Default
Settings，
0x80
7:
Enable/Disable the module
1
0
Output is enabled
Output is disabled
1
6:
Reserved
Margins
0
5:4
00
01
10
No margin
00
Margin low(Act on Fault)
Margin high(Act on Fault)
3:0
Reserved
0000
VOUT_OV_FAULT_RESPONSE [0x41]
Default
Settings，
0xB8
Bit number
Purpose
Bit Value
Meaning
7:6
Response settings
10
Unit shuts down and responds according to the
retry settings
10
5:3
2:0
Retry setting
111
Unit continuously restarts while fault is present
until commanded off
111
000
000
Unit does not attempt to restart on fault
No delay supported
Delay time setting
000
IOUT_OC_FAULT_RESPONSE [0x47]
Default
Bit number
Purpose
Bit Value
Meaning
Settings，0xF8
7:6
Response settings
11
Unit shuts down and responds according to the
retry settings
11,
5:3
Retry settings
111
Unit continuously restarts while fault is present
until commanded off
111
000
000
Unit does not attempt to restart on fault
No delay supported
2:0
Delay time setting
000
OT_FAULT_RESPONSE [0x50]
Default
Bit number
Purpose
Bit Value
Meaning
Settings，0x80
7:6
Response settings
10
Unit shuts down and responds according to the
retry settings
10,
5:3
2:0
Retry settings
111
Unit continuously restarts while fault is present
until commanded off
000
000
000
Unit does not attempt to restart on fault
No delay supported
Delay time setting
000
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P21
VIN_OV_FAULT_RESPONSE [0x56]
Default
Bit number
Purpose
Bit Value
Meaning
Settings，0xC0
7:6
Response settings
11
Unit shuts down and responds according to the
retry settings
11
5:3
Retry setting
111
Unit continuously restarts while fault is present
until commanded off
000
000
000
Unit does not attempt to restart on fault
No delay supported
2:0
Delay time setting
000
STATUS_WORD [0x79]
High byte
Bit number
Purpose
Bit Value
Meaning
7
6
An output over voltage fault or warning
An output over current fault or warning
1
0
1
Occurred
No Occurred
Occurred
0
No Occurred
5
An input voltage fault, including over voltage and
1
0
Occurred
undervoltage
Reserved
No Occurred
4
3
Power_Good
1
0
is negated
ok
2:0
Reserved
Low byte
Bit number
Purpose
Reserved
Bit Value
Meaning
7
6
OFF (The unit is not providing power to the output,
regardless of the reason)
1
Occurred
0
1
No Occurred
Occurred
5
4
An output over voltage fault
An output over current fault
0
1
No Occurred
Occurred
0
No Occurred
3
2
An input under voltage fault
1
0
1
Occurred
No Occurred
Occurred
A temperature fault or warning
0
No Occurred
1
0
CML (A communications, memory or logic fault）
1
0
Occurred；
No Occurred
Reserved
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P22
STATUS_VOUT [0x7A]
Bit number
Purpose
Output over voltage fault
Bit Value
Meaning
7
1
0
1
0
Occurred；
No Occurred
Occurred；
No Occurred
6
Output over voltage warning
5:0
Reserved
STATUS_IOUT [0x7B]
Bit number
Purpose
Bit Value
Meaning
7
Output over current fault
1
0
Occurred；
No Occurred
6
5
Reserved
Output over current warning
1
0
Occurred；
No Occurred
4:0
Reserved
STATUS_INPUT [0x7C]
Bit number
Purpose
Bit Value
Meaning
7
Input over voltage fault
1
0
Occurred；
No Occurred
6: 5
4
Reserved
Input under voltage fault
1
0
Occurred；
No Occurred
3:0
Reserved
STATUS_TEMPERATURE [0x7D]
Bit number
Purpose
Bit Value
Meaning
7
Over temperature fault
Over temperature warning
Reserved
1
0
1
0
Occurred；
No Occurred
Occurred；
No Occurred
6
5:0
STATUS_CML [0x7E]
Bit number
Purpose
Bit Value
Meaning
7
6
Invalid/Unsupported Command Received
Invalid/Unsupported Data Received
Packet Error Check Failed
Reserved
1
0
1
0
Occurred；
No Occurred
Occurred；
No Occurred
5
1
0
Occurred；
No Occurred
4:0
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P23
MFR_C1_C2_ARA_CONFIG [0xE0]
Bit number
Purpose
Bit Value
Meaning
7:5
4
Reserved
ARA
000
0
Reserved
ARA not functional, module
remains at resistor programmed
address when SMBLAERT is
asserted
3:0
PIN Configuration
0000
0010
C2 pin: POWER_GOOD
C2 pin: ON/OFF (Secondary)
MFR_ C2_Configure [0xE1]
Bit number
Purpose
Bit Value
000000
0
Meaning
7:2
1
Reserved
Reserved
ON/OFF Configuration
Secondary side on/off pin state
when mapped to C2 is ignored
AND – Primary and Secondary
side on/off
1
0
Secondary Side ON/OFF Logic
0
1
Negative Logic (Low Enable: Input
< 0.8V wrt Vout(-)
Positive Logic (High Enable:
Input > 2.0V wrt Vout(-)
MFR_PGOOD_POLARITY [0xE2]
Bit number
Purpose
Bit Value
Meaning
7:1
0
Reserved
0000000
Reserved
Power Good Logic
0
1
Negative PGOOD logic
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.
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P25
MECHANICAL DRAWING (WITHOUT HEAT-SPREADER)
Pin Specification:
Pins 1-3, 5
Pins 4,6
1.00mm (0.040”) diameter (All pins are copper with matte Tin plating over Nickel under plating)
1.50mm (0.059”) diameter (All pins are copper with matte Tin plating over Nickel under plating)
Pins 7-13
SQ 0.50mm(0.020’’) ( All pins are copper with gold flash plating)
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P26
RECOMMENDED PAD LAYOUT
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P27
PART NUMBERING SYSTEM
E
48
S
C
120
25
N
R
F
A
Form
Input
Number Product Output Output ON/OFF
Pin
Option Code
Factor Voltage
of
Series
Voltage Current Logic Length
Outputs
PMBUS
pin(7~13pin)
Trim Pin
Heat
spreader
F - RoHS 6/6
(Lead Free)
E -
48 -
S - Single C -
Series
120 - 12V 25A
N -
N - 0.145”
R - 0.170”
K - 0.110”
T - 0.220”
Eighth
Brick
36V~75V
Negative
A
B
C
D
E
H
I
Yes
Yes
Yes
Yes
No
No
P -
No
No
No
No
Yes
Yes
No
Positive
Yes
No
No
Yes
Yes
Yes
Yes
No
MODEL LIST
EFF @
100%LOAD
MODEL NAME
INPUT
OUTPUT
E48SC12025NRFH
36V~75V
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_05162016
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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