H48SC28016
450W DC/DC Power Module
FEATURES
High efficiency: 95% @ 28V/16A
Size:
61.0x57.9x10.3mm
(2.40”x2.28”x0.41”) w/o heat-spreader
61.0x57.9x12.5mm
(2.40”x2.28”x0.49”) with heat-spreader
Industry standard footprint and pinout
Fixed frequency operation
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)
H48SC28016
Half Brick DC/DC Power Modules
36~75V in, 28V/16A out, 450W
OPTIONS
H48SC28016, 36~75V input, isolated single output, Half Brick,
are full digital control DC/DC converters, it provides 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, fault protection, and
PMBUS communications, and so on. With the digital control,
many design and application flexibility, advanced performance,
and reliability are obtained.
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
Datasheet
DS_H48SC28016_06282019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P1
TECHNICAL SPECIFICATIONS
(T
A
=25°C, airflow rate=300 LFM, V
in
=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
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 ( I
2
t)
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
Over-Temperature Shutdown
(With heat spreader)
( NTC resistor )
NOTES and CONDITIONS
H48SC28016 (Standard)
Min.
0
Typ.
Max.
80
100
85
125
1500
48
35.0
33.0
2
110
22
1
80
50
27.72
28
28.28
±56
±56
±560
28.84
100
30
0
17.6
300
300
200
80
100
16
24
75
36.0
35.0
3
17
Units
Vdc
Vdc
Vdc
°C
°C
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
A
2
s
mA
dB
Vdc
mV
mV
mV
V
mV
mV
A
A
mV
mV
µs
mS
mS
µF
%
%
%
1500
10
6.9
120
Vdc
MΩ
nF
KHz
0.8
10
0.8
10
V
V
V
V
mA
%
%
%
Mhours
grams
grams
°C
°C
100ms
-40
-55
36
33.0
30.0
1
Full Load, 36Vin
Vin=48V, Io=0A
Vin=48V, Io=0A
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25°C
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
48Vin, 50µF ceramic, 1000uF Electrolytic Capacitor, 0.1A/µs
75% Io.max to 50% Io.max
50% Io.max to 75% Io.max
27.16
Full load; 5% overshoot of Vout at startup, low ESR cap.
Vin=36V
Vin=48V
Vin=48V
470
94.5
95
95.5
5000
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
Io=80% of Io, max; Ta=25°C, airflow rate=300LFM
Without heat spreader
With heat spreader
Refer to Figure 18 for Hot spot location (48Vin,80% Io)
3.5
3.5
-18
-3
125
2.9
62.0
93.5
110
125
+18
+10
150
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.
Datasheet
DS_H48SC28016_06282019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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.
Datasheet
DS_H48SC28016_06282019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P3
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
Figure 7:
Turn-on transient at full load current (40 ms/div).
Top Trace: Vout; 10V/div; Bottom Trace: input voltage:30V/div.
Datasheet
DS_H48SC28016_06282019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
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 (L
TEST
) of 12
μH.
Capacitor Cs offset
possible battery impedance. Measure current as shown above.
Figure 11:
Input Terminal Ripple Current, i
c
, at max output
current and nominal input voltage with 12µH source impedance
and 100µF electrolytic capacitor (500 mA/div
，
4us/div).
Datasheet
DS_H48SC28016_06282019
E-mail: dcdc@deltaww.com
http://www.deltaww.com/dcdc
P5
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