H48SC28016 - Delta Electronics

H48SC28016
450W DC/DC Power Module
FEATURES
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High efficiency: 95% @ 28V/16A
Size:
61.0x57.9x11.2mm
(2.40”x2.28”x0.44”) w/o heat-spreader
61.0x57.9x13.2mm
(2.40”x2.28”x0.52”) with heat-spreader
Industry standard footprint and pinout
Fixed frequency operation
Parallel and droop current sharing
Input UVLO
OTP and output OVP
Output OCP hiccup mode
Output voltage trim down : -18%
Output voltage trim up: +18%
Monotonic startup into normal and
pre-biased loads
1500V isolation and basic insulation
No minimum load required
No negative current during power or enable on/off
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS18001 certified manufacturing facility
UL/cUL 60950-1 (US & Canada) -pending
Delphi Series H48SC28016, Half Brick Family
DC/DC Power Modules:
36~75V in, 28V/16A out, 450W
OPTIONS
The Delphi Series H48SC28016, 36~75V input, isolated
single output, Half Brick, are full digital control DC/DC
converters, and are the latest offering from a world leader in
power systems technology and manufacturing ― Delta
Electronics, Inc. The H48SC28016 provide up to 450 watts of
power in an industry standard, DOSA compliant footprint and
pin out; the typical efficiency is 95% at 48V input, 28V output
and 16A load. There is a built-in digital PWM controller in the
H48SC28016, which is used to complete the Vo feedback,
PWM signal generation, droop current sharing, fault
protection, and PMBUS communications, and so on. With the
digital control, many design and application flexibility,
advanced performance, and reliability are obtained; and for
parallel and droop current sharing version, the module can be
connected in parallel directly for higher power without external
oring-fet.
DS_H48SC28016_02142014
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Negative or Positive remote On/Off

Open frame/Heat spreader

Digital pins, PMBus

Parallel and droop current sharing
APPLICATIONS

Optical Transport

Data Networking

Communications

Servers
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P1
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
H48SC28016 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Ambient Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Inrush Current ( I2t)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Regulation
Over Load
Over Line
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output 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
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Output Capacitance (note1)
EFFICIENCY
100% Load
100% Load
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Output Voltage Trim Range (note2)
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Weight
Over-Temperature Shutdown
(With heat spreader)
Over-Temperature Shutdown
( NTC resistor )
Typ.
0
100ms
-40
-55
Max.
Units
80
100
85
125
1500
Vdc
Vdc
Vdc
°C
°C
Vdc
36
48
75
Vdc
33.0
30.0
1
35.0
33.0
2
36.0
35.0
3
17
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
dB
Full Load, 36Vin
Vin=48V, Io=0A
Vin=48V, Io=0A
110
22
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
80
50
1
Vin=48V, Io=Io.max, Tc=25°C
27.72
Io=Io, min to Io, max
Vin=36V to 75V
Tc=-40°C to 85°C
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Vin=48V, Full Load, 50µF ceramic, 1000uF Electrolytic Capacitor
Vin=48V, Full Load, 50µF ceramic, 1000uF Electrolytic Capacitor
Vin=36V to75V
Output Voltage 10% Low
27.16
28.28
Vdc
±56
±56
±560
28.84
mV
mV
mV
V
16
24
mV
mV
A
A
100
30
0
17.6
48Vin, 50µF ceramic, 1000uF Electrolytic Capacitor, 0.1A/µs
75% Io.max to 50% Io.max
50% Io.max to 75% Io.max
Full load; 5% overshoot of Vout at startup, low ESR cap.
28
300
300
200
mV
mV
µs
80
100
mS
mS
µF
470
Vin=36V
Vin=48V
Vin=48V
5000
94.5
95
95.5
%
%
%
1500
6.9
Vdc
MΩ
nF
120
KHz
10
Von/off
Von/off
Von/off
Von/off
Ion/off at Von/off=0.0V
Logic High, Von/off=5V
Pout ≦ max rated power,Io ≦ Io.max
Pout ≦ max rated power,Io ≦ Io.max
% of nominal Vout
3.5
0.8
10
V
V
3.5
0.8
10
V
V
mA
-18
-3
125
+18
+10
150
%
%
%
Io=80% of Io, max; Ta=25°C, airflow rate=300LFM
Without heat spreader
With heat spreader
1
62.0
93.5
Mhours
hours
grams
grams
Refer to Figure 18 for Hot spot location (48Vin,80% Io)
110
°C
125
°C
Note: Please attach thermocouple on NTC resistor to test OTP function, the hot spots’ temperature is just for reference.
Note1: If the ambient temp is less than 0°C, double minimum output capacitance and additional 50uF ceramic capacitance is necessary.
Note2: For wider output voltage trim range and larger output capacitance, please contact Delta.
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P2
ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for 36V, 48V, and 75V
input voltage at 25°C.
Figure 2: Power dissipation vs. load current for 36V, 48V, and
75V input voltage at 25°C.
Figure 3: 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 (40ms/div).
Vin=48V. Top Trace: Vout; 10V/div; Bottom Trace: ON/OFF
input: 5V/div.
Figure 5: Turn-on transient at full load current (40ms/div).
Vin=48V. Top Trace: Vout: 10V/div; Bottom Trace: ON/OFF
input: 5V/div.
For Input Voltage Start up
Figure 6: Turn-on transient at zero load current (40 ms/div).
Top Trace: Vout; 10V/div; Bottom Trace: input voltage: 30V/div
DS_H48SC28016_02142014
Figure 7: Turn-on transient at full load current (40 ms/div).
Top Trace: Vout; 10V/div; Bottom Trace: input voltage:30V/div.
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P4
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (50%-75% of Io, max; di/dt = 0.1A/µs; Vin=48V). Load
cap: 1000µF Electrolytic Capacitor and 50µF ceramic capacitor.
Top Trace: Vout (0.2V/div, 200us/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 9: Output voltage response to step-change in load
current (75%-50% of Io, max; di/dt = 0.1A/µs; Vin=48V). Load
cap: 1000µF Electrolytic Capacitor and 50µF ceramic
capacitor. Top Trace: Vout (0.2V/div, 200us/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
100uF
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.
DS_H48SC28016_02142014
Figure 11: Input Terminal Ripple Current, ic, at max output
current and nominal input voltage with 12µH source impedance
and 100µF electrolytic capacitor (500 mA/div,4us/div).
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P5
ELECTRICAL CHARACTERISTICS CURVES
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and max load current
(25mA/div,4us/div).
Figure 13: Output voltage noise and ripple measurement test
setup.
Figure 14: Output voltage ripple at nominal input voltage and
max load current (50 mV/div, 2us/div)
Load capacitance: 50µF ceramic capacitor and 1000µF
Electrolytic Capacitor. Bandwidth: 20 MHz.
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
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Safety Considerations
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 220μF electrolytic capacitor (ESR <
0.7 Ω at 100 kHz) mounted close to the input of the
module to improve the stability.
Layout and EMC Considerations
Delta’s DC/DC power modules are designed to operate
in a wide variety of systems and applications. For design
assistance with EMC compliance and related PWB
layout issues, please contact Delta’s technical support
team. An external input filter module is available for
easier EMC compliance design. Below is the reference
design for an input filter tested with H48SC28016 to
meet class B in CISSPR 22.
Schematic and Components List
100n
Vin+
4.7u
INPUT-
750uH
PA2416
10u(Pulse)
Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2 or
SELV. An additional evaluation is needed if the source is
other than TNV-2 or SELV.
When the input source is SELV circuit, the power module
meets SELV (safety extra-low voltage) requirements. If
the input source is a hazardous voltage which is greater
than 60 Vdc and less than or equal to 75 Vdc, for the
module’s output to meet SELV requirements, all of the
following must be met:

The input source must be insulated from the ac
mains by reinforced or double insulation.

The input terminals of the module are not operator
accessible.

A SELV reliability test is conducted on the system
where the module is used, in combination with the
module, to ensure that under a single fault,
hazardous voltage does not appear at the module’s
output.
100n
INPUT+
PA2416
(Pulse)
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 and IEC 60950-1 2nd :
2005 and EN 60950-1 2nd: 2006+A11+A1: 2010, if the
system in which the power module is to be used must
meet safety agency requirements.
100n
470u*2
750uH
100n
Vout+
MODULE
Vin-
Vout-
100n
When installed into a Class II equipment (without
grounding), spacing consideration should be given to
the end-use installation, as the spacing between the
module and mounting surface have not been evaluated.
Test Result:Vin=48V,Io=16A
dBμV
80.0
Limits
55022MQP
55022MAV
70.0
60.0
50.0
40.0
Transducer
8130
Traces
PK+
AV
30.0
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 50A 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.
20.0
Soldering and Cleaning Considerations
10.0
0.0
150 kHz
1 MHz
10 MHz
30 MHz
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
Blue Line is quasi peak mode;green line is average mode.
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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.
Vi(+)
Vo(+)
Sense(+)
ON/OFF
trim
Rload
Sense(-)
Vi(-)
Vo(-)
FEATURES DESCRIPTIONS
Over-Current Protection
Figure 16: Remote on/off implementation
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 shut down (hiccup mode).
The modules will try to restart after shutdown. If the
overload condition still exists, the module will shut down
again. This restart trial will continue until the overload
condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the over-voltage
set point, the protection circuit will constrain the max
duty cycle to limit the output voltage, if the output
voltage continuously increases the modules will shut
down, and then restart after a hiccup-time (hiccup
mode).
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.The module will restart after
the temperature is within specification.
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.
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect an external resistor between the TRIM pin and
the Vout+ or Vout-. The TRIM pin should be left open if
this feature is not used.
For trim down, the external resistor value required to
obtain a percentage of output voltage change △% is
defined as:
100

Rtrim  down  
 2   K 



Ex. When Trim-down -10% (28V×0.9=25.2V)
100

Rtrim  down  
 2 K   8K 
 10

For trim up, the external resistor value required to
obtain a percentage output voltage change △% is
defined as:
Rtrim  up 
Vo (100   ) 100

 2K 
1.225

Ex. When Trim-up +10% (28V×1.1=30.8V)
Rtrim  up 
28  (100  10) 100

 2  239.4K 
1.225  10
10
The output voltage can be increased by both the remote
sense and the trim, however the maximum increase is
the larger of either the remote sense or the trim, not the
sum of both.
The output voltage can also be trimmed by potential
applied at the Trim pin.
Vo  (Vtrim 1.225)11.43
Remote on/off can be controlled by an external switch
between the on/off terminal and the Vi (-) terminal. The
switch can be an open collector or open drain. For
negative logic if the remote on/off feature is not used,
please short the on/off pin to Vi (-). For positive logic if
the remote on/off feature is not used, please leave the
on/off pin to floating.
DS_H48SC28016_02142014
Where trim Vtrim is the potential applied at the Trim pin,
and Vo is the desired output voltage.
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THERMAL CONSIDERATIONS
When using remote sense and trim, the output voltage
of the module is usually increased, which increases the
power output of the module with the same output
current.
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
PWB
FANCING PWB
MODULE
50.8(2.00")
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
AIR FLOW
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 17: 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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THERMAL CURVES
(ATTACH TO COLD PLATE)
Vin(+)
Vout(+)
SENSE(+)
ON/OFF
TRIM
CASE
SENSE(-)
Vin(-)
Vout(-)
Figure 18: *Temperature measurement location viewed from
top side. The allowed maximum hot spot temperature is defined
at 100℃.
H48SC28016(Standard) Output Power vs. Hot Spot Temperature
@Vin = 48V (Either Orientation,With Heatspreader)
Output Power (W)
500
450
400
350
300
250
200
150
100
50
0
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
105
Hot Spot Temperature (℃)
Figure 19: Output power vs. Hot spot temperature @Vin=48V
(Either Orientation)
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MECHANICAL DRAWING (WITH HEAT SPREADER)
For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly
onto system boards; please do not subject such modules through reflow temperature profile.
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MECHANICAL DRAWING (WITHOUT HEAT SPREADER)
Pin No.
Name
1
+Vin
2
ON/OFF
3
Case
4
-Vin
5
-Vout
6
-SENSE
7
TRIM
8
+SENSE
9
+Vout
Digital pin(optional)
10
C2
11
DGND
12
PMBData
13
SMBAlert
14
PMBCLK
15
Addr1
16
Addr0
Function
Positive input voltage
Remote ON/OFF
Case ground
Negative input voltage
Negative output voltage
Negative remote sense
Output voltage trim
Positive remote sense
Positive output voltage
Pin Specification:
Pins 1-4,6-8
Pins 5 & 9
Pins 10~16
1.00mm (0.040”) diameter
1.50mm (0.059”) diameter
2. 0.50mm (0.020”) square
Note: All pins are copper alloy with matte Tin(Pb free) plated over Nickel under plating.
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RECOMMENDED LAYOUT
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PART NUMBERING SYSTEM
H
48
Form
Input
S
C
Number Product
Factor Voltage
of
280
16
Output
N
Output ON/OFF
R
F
Pin
Pin
H
Series
Voltage Current
Logic
Length assigment
C-
280 - 28V 16 - 16A
N-
K – 0.110” F - RoHS 6/6
Outputs
H- Half
48 -
Brick
36V~75V
S - Single
PMBUS
pin(10~16pin)
Heat spreader
No
No
B
Yes
No
C
Yes
Yes
H
No
Yes
Negative N – 0.145” (Lead Free A
Series
number
P-
R – 0.170”
Positive
MODEL LIST
MODEL NAME
H48SC28016NRFH
INPUT
36V~75V
OUTPUT
17A
28V
EFF @ 100% LOAD
16A
95.0% @ 48Vin
Default remote on/off logic is negative and pin length is 0.170”.
For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales office.
For modules with through-hole pins and the optional heatspreader, they are intended for wave soldering assembly onto system
boards; please do not subject such modules through reflow temperature profile.
If need digital pins and pmbus, please contact with Delta.
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107
ext 6220~6224
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
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