HDS48T30120 DC-DC Converter Data Sheet
Half-Brick with 48 VDC Input; 12 VDC @ 30A Output
Features
RoHS lead solder exemption compliant
Fully regulated and quasi-regulated models available
High output power of 360 W
Efficiency up to 93%
Wide-input voltage range from 36 to 75 V
100V/100ms input voltage surge withstand
Input-to-output isolation: 1500 VDC
Basic insulation
Backdrive protection
Start-up into pre-biased load
Output overcurrent & overvoltage protection
Overtemperature protection
Remote on/off (primary referenced), positive or
negative logic option
Designed to comply with NEBS GR-1089 and GR-63
Safety: UL60950-3
rd
/ CSA C22.2 60950-00,
TUV EN60950-1:2001, IEC60950-1:2001
Applications
Networking equipment
Data/voice processing
Wireless communications
Computing
Benefits
Simplifies power system design; reduces design
time and technical risk
Description
The HDS is a high density and highly efficient, isolated dc-dc converter that operates over an input voltage range
of 36 to 75 VDC. It provides a 12 VDC nominal, fully-regulated output voltage at up to 30 Amps of current. Where
adjustable voltage trim, remote sense, and tight dynamic load response are not required, a lower cost quasi-
regulated model is offered.
The thermally-optimized construction of the HDS allows the unit to provide high output current over a wide
operating temperature range while maintaining a safe guardband for component electrical and thermal ratings.
The addition of an external heat sink increases the capacity of the unit. The HDS employs 100% surface-mount
components for consistency and reliability in the production process.
Model Selection
Model
HDS48T30120
NOTES:
1
@ V
IN
min.
2
Input
Voltage
VDC
36-75
Input
Current,
Max ADC
1
12
Output
Voltage
VDC
Output Rated
Current I
rated
ADC
30
Output
Ripple/Noise,
mV p-p
2
250
Typical
Efficiency @
I
RATED
%
93
12
(NOM.)
(DC to 500 kHz)
Model numbers highlighted in yellow or shaded are not recommended for new designs
MCD10163 Rev. 1.1, 15-Jun-10
Page 1 of 14
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HDS48T30120 DC-DC Converter Data Sheet
Half-Brick with 48 VDC Input; 12 VDC @ 30A Output
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect
long-term reliability, and cause permanent damage to the converter.
Parameter
Input voltage
Operating Temperature
Storage Temperature
ON/OFF Control Voltage
Output Power
Note:
1
1
1
Conditions/Description
Continuous
Transient withstand
Baseplate
Ambient
Referenced to -Vin
Min
Max
75
100
Units
VDC
VDC
C
C
C
VDC
W
-40
-40
-55
110
85
125
7
360
with appropriate power derating, see figure 14 & 15.
Environmental and Mechanical Specifications
Parameter
Operating Humidity
Storage Humidity
Water Washing
Shock
Sinusoidal Vibration
Weight
Dimensions
MTBF (Calculated)
(Overall)
Per Telcordia SR-332 Issue 1,
(method 1, case 2, GB, 40
O
C)
Conditions/Description
Relative Humidity, Non-cond.
Relative Humidity, Non-cond.
Standard process
Halfsine wave, 3 axes
GR-63-CORE, Section 5.4.2
50
1
2.6/74
2.28(57.9) x 2.4(61) x
0.5(12.7)
2.3
Yes
g
g
Oz(g)
In.
(mm)
MHrs
Min
Nom
Max
95
95
Units
%
%
Isolation Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Conditions/Description
Min
Nom
Max
Units
Insulation Safety Rating
Isolation Voltage
Basic
Input to Output
Input to Baseplate
Output to Baseplate
Input to Output
Input to Output
1500
1500
1500
10
-
VDC
VDC
VDC
MΩ
pF
Isolation Resistance
Capacitance
1,000
MCD10163 Rev. 1.1, 15-Jun-10
Page 2 of 14
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HDS48T30120 DC-DC Converter Data Sheet
Half-Brick with 48 VDC Input; 12 VDC @ 30A Output
Safety Regulatory Compliance
Safety Agency
CSA
TUV product service
CB report
Conducted Emissions
Standard Approved To:
UL60950-
3RD
/ CSA C22.2 60950-00
TUV EN60950-1:2001
IEC60950-1:2001
(with external EMI filter)
Marking
cCSAs
TUV PS Baurt mark
N/A. May use CE mark
CISSPR 22 class B
Input Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Input Voltage
Maximum Input Current
Turn-On Input Voltage (UVLO)
Turn-Off Input Voltage
Turn-Off Hysteresis
Input Reflected Ripple Current
Inrush Transient
1
2
3
4
1
1
Conditions/Description
Continuous
Vin =36 V, Iout=I
RATED
Ramping Up
Ramping Down
I
RATED
, 12 µH source inductance
2, 3, 4
BW=20 MHz
Vin = Vin.max
Min
36
33
31.5
1.5
Nom
48
34
32.5
150
Max
75
12
35
33.5
200
1
Units
VDC
ADC
VDC
VDC
VDC
mA p-p
A
2
s
See figure 1
Vin = 48 V.
See Figure 10 for measurement method
Refer to Fig 1, current waveform
Output Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Output specifications reflect those of the fully-regulated model; option suffix:
-xxxR
Parameter
Output Voltage
Set-point
Line Regulation:
Load Regulation:
Temperature Regulation
Total Error Band
Dynamic Regulation
Peak Deviation
Settling Time
Conditions/Description
(Vin = 48 V, Io = 15 A)
(Vi = 36 V to 75 V, Io
RATED
)
(Vin = 48 V, Io = 0 to 30 A)
(T
BASEPLATE
) = -40
O
C to +110
O
C)
(Line, Load, Temperature)
75-100-75% load step change,
di/dt=1A/s
to 1% error band
Co=100 µF
11.64
0.005
12
Min
11.76
Nom
12
Max
12.24
0.2
1.7
0.2
1.7
0.01
12.36
Units
VDC
VDC
% Vo
VDC
% Vo
%/
O
C
VDC
360
5
720
10
mV
ms
MCD10163 Rev. 1.1, 15-Jun-10
Page 3 of 14
www.power-one.com
HDS48T30120 DC-DC Converter Data Sheet
Half-Brick with 48 VDC Input; 12 VDC @ 30A Output
Output specifications reflect those of the quasi-regulated model; option suffix:
-xxx0
Parameter
Output Voltage
1
Conditions/Description
Set-point
(Vin = 48 V, Io = 15A)
(Vi = 36 V to 75V, Io
RATED
)
(Vin = 48 V, Io = 0 to 30 A)
(T
BASEPLATE
) = -40
O
C to +110
O
C)
(Line, Load, Temperature)
75-100-75% load step change,
di/dt=1A/s
to 1% error band
Co=100 µF
Min
11.76
Nom
12
Max
12.24
-0.4
-3.3
-0.4
-3.3
Units
VDC
VDC
% Vo
VDC
% Vo
%/
O
C
VDC
mV
ms
Line Regulation:
1
Load Regulation:
Temperature Regulation
Total Error Band
Dynamic Regulation
Peak Deviation
Settling Time
1
.5
11.3
12
1,300
5
1
12.7
1,500
10
See figure 4 for detailed regulation characteristics.
General Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Output Current
Current Derating
2
Conditions/Description
I
rated
@ 200 LFM, 55 C
AMBIENT
, no
heatsink
@ 200 LFM, 55
O
C
AMBIENT
, w/
0.45” finned heatsink
O
Min
0
Nom
Max
30
17
22
Units
ADC
ADC
ADC
%
kHz
Efficiency
3
(T
AMB
=25C)
4
Vin
NOM
, I
rated
=30A
Fixed frequency
Over line and load,
T
AMB
= 0
C
to 85
C
(DC to 20 MHz)
Overall input voltage, load, and
temperature conditions
Time from Vin=UVLO to
regulation band
Time from enable to regulation
band
From 10 to 90% of Vout.nom
91
500
93
570
150
1.25
30
0.25
0
250
1.7
60
0.5
5
100
60
60
9,000
Switching Frequency
Output Ripple
mVp-p
% Vo
mV
RMS
% Vo
%Vout
ms
ms
ms
F
Turn-on Overshoot
Turn-On Time
Turn-On Time
Rise Time
2
3
4
5
6
7
5, 6
5
50
75
40
40
(via application of input voltage)
6
(via On/Off signal)
Admissible Load Capacitance
See Figures 16 & 17, power derating curves.
See Figure 3 for efficiency characteristics.
100
7
See Figures 9 and 10 for output ripple waveform and recommended test setup.
Refer to Figure 5.
Refer to Figure 6.
For –xxxR suffix models, Co > 270uF is recommended.
MCD10163 Rev. 1.1, 15-Jun-10
Page 4 of 14
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HDS48T30120 DC-DC Converter Data Sheet
Half-Brick with 48 VDC Input; 12 VDC @ 30A Output
Protections Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Type
Threshold
Short Circuit
Type
Threshold
Type
Threshold
Hysteresis
1
2
1
Conditions/Description
Overcurrent Protection
Min
(Vin = V
NOM
)
33
Nom
Max
Units
Non-latching – auto-recovery, hiccup type.
39
2
45
4
ADC
A
RMS
Hiccup Mode
Overvoltage Protection
Latching, recycle input voltage or ON/OFF signal to unlatch
13.8
14.4
15
Vin = Vin.nom, Iout = I
RATED
VDC
Overtemperature Protection
Non-latching, auto-recovery
Baseplate temperature
2
120
10
130
C
C
Refer to Figure 12.
Refer to Figure 13.
Feature Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Negative Logic (-N suffix)
On/Off (pin #3)
(Primary side ref. to -Vin)
Positive Logic (-P suffix)
On/Off (pin #3)
(Primary side ref. to -Vin)
Conditions/Description
On/Off
(On/Off signal is low – converter is ON)
Converter ON
Sink current
Converter OFF
Open circuit voltage
(On/Off signal is low – converter is OFF)
Converter ON
Open Circuit Voltage
Converter OFF
Sink Current
1, 2
Remote Sense
Output Voltage Trim
Trim Up
Trim Down
1
2
1, 2
Min
Nom
Max
Units
-0.5
0.5
2.5
2
2.5
-0.5
0.5
0.8
1
7
VDC
mADC
VDC
VDC
VDC
VDC
VDC
mADC
VDC
VDC
VDC
7
5
0.8
1
1.2
1.2
Remote Sense Headroom
-1.2
Applies only to model suffix:
-xxxR
Combined output voltage positive adjustment can not exceed 1.2 VDC.
MCD10163 Rev. 1.1, 15-Jun-10
Page 5 of 14
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