HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A Output
Benefits
•
Simplifies power system design; reduces design
time and technical risk
•
Compatible with all (12 Vin nom) POLs available in
the market
Features
•
RoHS lead free solder and lead solder exempted
products are available
•
Fully regulated output
•
High output power of 384 W
•
Flat efficiency curve to 94.5%
•
Wide-input voltage range from 35 to 75 VDC
•
100V/100ms input voltage surge withstand
•
Backdrive protection
•
Start-up into pre-biased load
•
Output overcurrent protection
•
Output overvoltage protection
•
Overtemperature protection
•
Remote on/off (primary referenced),
positive or negative logic option
•
Designed to comply with NEBS GR-1089 and GR-63
•
Basic insulation
•
Input-to-output isolation: 2121 VDC
•
Safety: UL60950-1, CSA C22.2 No. 60950-1-03,
TUV EN60950-1:2001, IEC60950-1:2001
Applications
•
Power systems utilizing IBA
(Intermediate Bus Architecture)
•
Networking equipment
•
Data/voice processing
•
Wireless communications
•
Computing
Description
The HKS is a high density and highly efficient, isolated DC-DC converter that operates over an input voltage range
of 35 to 75 VDC. It provides a 12 VDC nominal, fully regulated output at up to 32 Amperes of direct current. The
converter is an ideal choice for building a complete power system utilizing the Intermediate Bus Architecture (IBA).
The thermally-optimized construction of the HKS allows the unit to provide high output current over a wide
operating temperature range while maintaining a safe guardband for electrical and thermal component ratings.
The HKS employs 100% surface-mount components for consistency and reliability in the production process.
Model Selection
Model
HKS48T30120
1
2
Input
Voltage
VDC
35-75
Input
Current,
Max ADC
1
12
Output
Voltage
VDC
12
(NOM.)
Output Rated
Current I
rated
ADC
32
Output
Ripple/Noise,
mV
P-P 2
120
(NOM.)
Typical
Eff.@ I
rated
%
94.5
@ V
IN
min.
(DC to 500 kHz)
FEB 14, 2006 revised to MAY 17, 2006
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HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A 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
1
2
1
Conditions/Description
Continuous
Transient withstand
Hot Spot Monitor Location
Ambient
Referenced to -Vin
2
Min
Max
75
100
Units
VDC
VDC
°C
°C
°C
VDC
W
-40
-40
-55
-1
124
85
125
18
384
with appropriate power derating, see figure 17.
See temperature probe locations Figure 18, 19.
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,
O
(method 1, case 2, GB, 40 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
2.9 (82)
2.28 (57.9) x 2.4 (61.0)
x 0.5 (12.7)
1.2
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
Insulation Safety Rating
Isolation Voltage
Input to Output
Input to Baseplate
Output to Baseplate
Isolation Resistance
Capacitance
Input to Output
Input to Output
10
1,000
2121
N/A
N/A
MΩ
pF
Conditions/Description
Min
Nom
Basic
VDC
Max
Units
FEB 14, 2006 revised to MAY 17, 2006
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HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A Output
EMI & Safety Regulatory Compliance
Safety Agency
UL
TUV product service
CB report
Declaration of Conformity
Conducted Emissions
1
1
Standard Approved To:
UL60950-1 / CSA C22.2 No. 60950-1-03
TUV EN60950-1:2001
IEC60950-1:2001
DIR 73/23/EEC Low Voltage Directive
(with external EMI filter)
Marking
cURus
TUV PS Baurt mark
N/A
CE
CISPR 22 class A
See figures 20 & 21.
Input Specifications
All specifications apply over the specified input voltage and output load at @ 40
º
C ambient temperature, 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
No-load Input Current
No-load Power Dissipation
Disabled Input Current
Inrush Transient
1
1
1
Conditions/Description
Continuous
Vin =35V, Iout=I
RATED
Ramping Up
Ramping Down
I
RATED
, 12µH source inductance
2
BW=20MHz
35VDC < Vin < 75VDCc
Vin = 48VDC
35VDC < Vin < 75VDC
Vin=Vin.max
Min
35
32.5
30.1
1.5
Nom
48
33.5
31.5
15
170
21
Max
75
12
34.6
32.8
50
250
8
24
2
Units
VDC
ADC
VDC
VDC
VDC
mA
P-P
mA
W
mA
A
2
s
See figure 2
2
Vin = 48 V, see Figures 1 & 10.
Output Specifications
All specifications apply over specified input voltage, output load, and @ 40
°
C ambient temperature, unless
otherwise noted.
Parameter
Output Voltage
Set-point
Line Regulation:
Load Regulation:
Temperature Regulation
Total Error Band
Dynamic Regulation
1
Conditions/Description
(Vin = 48 V, Io = 30 A)
(Vi = 35 V to 75 V, Io
RATED
)
(Vin = 48 V, Io = 0 to 30 A)
(T
AMBIENT
) = -40
O
C to +85
O
C)
(Line, Load, Temperature,
Ripple, Life)
75-100-75% load step change,
to 1% error band, Co=220µF
di/dt = 1.0A/μs >>>
di/dt = 0.1A/μs >>>
Min
11.7
Nom
12
< 0.03
< 0.25
< 0.06
< 0.5
0.005
Max
12.3
0.06
0.5
0.12
1.0
0.03
12.5
Units
VDC
VDC
% Vo
VDC
% Vo
%/
O
C
VDC
11.5
12
Peak Deviation
Settling Time
Peak Deviation
Settling Time
1
+/-525
100
+/-400
100
+/-725
175
+/-550
175
mV
μs
mV
μs
See Figure 7.
FEB 14, 2006 revised to MAY 17, 2006
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HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A Output
General Specifications
All specifications apply over specified input voltage, output load, and @ 40
O
C ambient temperature, unless
otherwise noted.
Parameter
Output Current
Current Derating
Efficiency
2
1
Conditions/Description
I
rated
@ 200LFM, 55 C
AMBIENT
@ 200LFM, 70 C
AMBIENT
O
O
Min
0
Nom
Max
32
23
20.2
Units
ADC
ADC
ADC
%
kHz
(T
AMB
=40°C)
3
Vin
NOM
, I
O
=
I
RATED
Fixed frequency
Over line and load,
T
AMB
= 0°C to 85°C
(DC to 20MHz)
94.5
260
150
1.25
50
0
20
16
16
220
4
Operating (output ripple) Frequency
Output Ripple
300
2.5
100
0
100
100
30
14,000
5
mVp-p
% Vo
mV
RMS
%Vout
ms
ms
ms
μF
Turn-on Overshoot
Turn-On Time
Turn-On Time
Rise Time
1
5
4
4
4
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
2
(via application of input voltage)
4
(via On/Off signal)
Admissible Load Capacitance
See Figure 17.
See Figure 3.
3
See Figures 8 & 9.
See Figure 4, 5 & 6.
10/90% mix of ceramic / low ESR tantalum capacitors or OS-CON
Protections Specifications
All specifications apply over specified input voltage, output load, and @ 40
°
C ambient temperature, unless
otherwise noted.
Parameter
Type
Threshold
Short Circuit
Type
Threshold
Type
Threshold
Hysteresis
1
2
1
Conditions/Description
Overcurrent Protection
Min
Nom
Max
Units
Non-latching – auto-recovery, hiccup type.
Vin = Vin
NOM
Hiccup Mode
Overvoltage Protection
Latching, recycle input voltage or ON/OFF signal to unlatch
14.15
14.6
15.25
Vin = Vin
NOM
, Iout = I
RATED
VDC
Overtemperature Protection
Non-latching, auto-recovery
PCB temperature
2
33
13.5
40
18
ADC
A
RMS
120
10
130
°C
°C
Refer to Figure 11.
Refer to Figure 12 & 13.
FEB 14, 2006 revised to MAY 17, 2006
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HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A Output
Feature Specifications
All specifications apply over specified input voltage, output load, and @ 40
O
C ambient temperature, 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
Remote Sense
1
Output Voltage Trim
Trim Up
Trim Down
1
1
Min
Nom
Max
Units
-0.5
2.5
4.8
2.5
4.8
-0.5
0.8
0.5
18
5
18
5
0.8
0.5
1.2
1.2
VDC
mADC
VDC
VDC
VDC
VDC
VDC
mADC
VDC
VDC
VDC
Remote Sense Headroom
-1.2
Combined output voltage positive adjustment cannot exceed 1.2 VDC (also refer to
”Output Voltage Adjust”
section)
FEB 14, 2006 revised to MAY 17, 2006
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