HHS60 DC/DC Series Data Sheet
60A Half-Brick Converter
Features
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Applications
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Distributed power architectures
Telecommunications equipment
LAN/WAN
Data processing
Low profile (12.7mm)
1500VDC input-to-output isolation meets
Basic insulation
High efficiency - to 90% at full load
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Output overvoltage protection
Overtemperature protection
Back drive protection
Remote sense
Set point accuracy
±
1%
Remote on/off (primary referenced), positive
or negative logic
Output voltage trim adjust, positive or
negative
UL1950 recognized, CSA 22.2 no. 950-95
certified, TUV IEC95
Description
The new HHS60 series of high-density, single-output DC/DC converters is ideal for telecom and datacom systems
that require low voltage at high current in an industry-standard, half-brick footprint. Highly efficient topology and
thermally-optimized construction allow the units to provide high output current in the system over a wide operating
temperature range while still maintaining a safe guardband for component electrical and thermal ratings. The
addition of an external heatsink increases the capacity of the unit. The HHS60 employs 100% surface-mount
components for consistency and reliability in our production process, and is available in five standard output
voltages from 1.2 V to 3.3 V.
Model Selection
Model
Input
Voltage
VDC
36-75
36-75
36-75
36-75
36-75
Input
Current, Max
ADC
6.1
4.7
3.5
2.9
2.5
Output
Voltage
VDC
3.3
2.5
1.8
1.5
1.2
Output Rated
Current I
rated
ADC
60
60
60
60
60
Output
Ripple/Noise,
mV p-p
100
100
100
100
100
Typical
Efficiency @
I
rated
%
90
89
86
85
82
HHS60ZE
HHS60ZD
HHS60ZB
HHS60ZA
HHS60ZY
This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment
should be followed.
REV. JUL 23, 2003
Page 1 of 9
HHS60 DC/DC Series Data Sheet
60A Half-Brick Converter
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
Referenced to -Vin
Conditions/Description
Continuous
Transient, 100ms
At 100% load
Min
Max
75
100
100
125
50
Units
VDC
VDC
°C
°C
VDC
-40
-40
Environmental and Mechanical Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Shock
Sinusoidal Vibration
Weight
Water Washing
MTBF
Conditions/Description
Halfsine wave, 3 axes
GR-63-Core, Section 5.A.2
Standard process
Per Bellcore TR-NWT-000332
Min
50
1
Nom
Max
Units
g
Oz/g
kHrs
3
Yes
1,240
Isolation Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Insulation Safety Rating
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Conditions/Description
Min
1500
10
1800
Nom
Basic
Max
Units
VDC
MΩ
pF
Input Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Input Voltage
Turn-On Input Voltage
Turn-Off Input Voltage
Turn-On Time
Input Reflected Ripple Current
Inrush Transient
Conditions/Description
Continuous
Ramping Up
Ramping Down
To Output Regulation Band
100% Resistive Load
Full Load, 12µH source inductance
Vin=Vin.max
Min
36
Nom
48
33
32
Max
75
Units
VDC
VDC
VDC
ms
mA p-p
As
2
15
80
0.1
REV. JUL 23, 2003
Page 2 of 9
HHS60 DC/DC Series Data Sheet
60A Half-Brick Converter
Output Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Output Voltage Setpoint Accuracy
Output Current*
Line Regulation
Load Regulation
Total output voltage regulation
Remote Sense Headroom***
Dynamic Regulation
Peak Deviation
Settling Time
Admissible Load Capacitance
Output Current Limit Threshold**
Switching Frequency
Overvoltage Protection,
Non Latching
Trim Range
Conditions/Description
Vin=Vin.nom, Full Load
Vin.min to Vin.max, Iout.max
Vin=Vnom, Iout.min to
Iout.max
Overall input voltage, load, and
temperature conditions
50-75% load step change
to 1% error band
Iout.max, Nom Vin
Vout≤0.97Vout.nom
Overall input voltage and load
conditions
Iout.max, Vin=Vnom
100,000
110
250
120
90
140
110
140
8
150
%Vout
µs
µF
%Iout
kHz
%Vout
%Vout
Min
-1
0
Nom
Max
1
60
0.2
0.2
2
10%
Units
%Vout
ADC
%Vout
%Vout
%Vout
%Vout
-2
* At Iout<Iout.min, the output may contain low frequency component that exceeds ripple specifications.
** Overcurrent protection is non-latching with auto recovery.
*** Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total output voltage trim from all
sources should not exceed 10% of Vout
Feature Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Parameter
Shutdown (ON/OFF)
Negative Logic
- Converter ON
- Source Current
- Converter OFF
-Open Circuit Voltage
Positive Logic
- Converter ON
- Open Circuit Voltage
- Converter OFF
- Source Current
Overtemperature Protection
Conditions/Description
On/Off signal is low – converter is ON
-1.0
ON/OFF pin is connected to -Vin
3.5
ON/OFF pin is floating
On/Off signal is low –converter is OFF
3.5
ON/OFF pin is floating
-1.0
ON/OFF pin is connected to -Vin
Base Plate Temp. – Shut down
- Recover
110
90
3
1.8
1
2
50
1.8
1
50
VDC
mADC
VDC
VDC
VDC
VDC
VDC
mADC
°C
Min
Nom
Max
Units
REV. JUL 23, 2003
Page 3 of 9
HHS60 DC/DC Series Data Sheet
60A Half-Brick Converter
Characteristic Curves:
95
Efficiency,%
95
90
Efficiency,%
85
80
75
70
65
36V
48V
75V
90
85
80
75
70
65
0
10
20
30
40
50
60
Output current, A
Figure 1. HHS60ZE (3.3V) Efficiency Curves
36V
48V
75V
0
10
20
30
40
Output current, A
50
60
Figure 4. HHS60ZA (1.5V) Efficiency Curves
95
90
Efficiency, %
85
80
75
70
65
0
10
20
30
40
Output current, A
50
60
36V
48V
75V
Efficiency, %
95
90
85
80
75
70
65
0
10
20
30
40
50
60
Output current, A
Figure 5. HHS60ZY (1.2V) Efficiency Curves
36V
48V
75V
Figure 2. HHS60ZD (2.5V) Efficiency Curves
95
Efficiency,%
6
5
Input current, A
4
3
2
1
0
90
85
80
75
70
65
0
10
20
30
40
50
60
Output current, A
Figure 3. HHS60ZB (1.8V) Efficiency Curves
36V
48V
75V
0
10
20
30
40
Input voltage, V
50
60
70
Figure 6. HHS60 Input Characteristics
REV. JUL 23, 2003
Page 4 of 9
HHS60 DC/DC Series Data Sheet
60A Half-Brick Converter
Typical Application
Figure 7 shows the recommended connections for
the HHS60 Series converter.
HHS60ZX
Fuse
+Vi
+Vo
+Sense
C1
On/Off
Trim
-Sense
-Vi
-Vo
C2
C3
When the ON/OFF pin is used to achieve remote
control, the user must take care to insure that the pin
reference for the control is really the -Vin pin. The
control signal must not be referenced ahead of EMI
filtering or remotely from the unit. Optically coupling
the information and locating the optical coupler
directly at the module will solve any of these
problems.
Note:
If the ON/OFF pin is not used, it can be left floating (positive logic),
or connected to the -Vin pin (negative logic).
Output Voltage Trim
The trim feature allows the user to adjust the output
voltage from the nominal value. This can be used to
compensate distribution drops, perform margining in
production, or accommodate other requirements
when output voltage needs to be adjusted from the
nominal. There are two trim options available in the
HHS60 Series.
Standard Negative Trim (No suffix)
The negative trim method is the Power-One
standard. The HHS60 standard trim units trim up
with a resistor from the TRIM pin to the Sense pin
and trim down with a resistor from the TRIM Fig.8
HHS60 Series negative trim schematic pin to the
+Sense pin as shown in Figure 8.
Figure 7. Typical Application of the HHS60 Series
The HHS60 series converters do not require any
external components for proper operation. However,
if the distribution of the input voltage to the converter
contains significant inductance, the capacitor C1
may be required to enhance performance of the
converter.
A minimum of a 100µF electrolytic
capacitor with the ESR<0.7Ω is recommended for
the HHS60 series.
If magnitude of the inrush current needs to be
limited, see the “Inrush Current Control Application
Note” on the Power-One website at www.power-
one.com.
For output decoupling we recommend using a 10µF
tantalum and a 1µF ceramic capacitors connected
directly across the output pins of the converter.
Note, that the capacitors do not substitute the
filtering required by the load.
Shutdown Feature Description
The ON/OFF pin in the HHS60 Series converters
functions as a normal soft shutdown. It is referenced
to the –Vin pin (see Figure 7). With positive logic,
when the ON/OFF pin is pulled low, the output is
turned off and the unit goes into a very low input
power mode. With negative logic, when the ON/OFF
pin is pulled low, the unit is turned on.
An open collector switch is recommended to control
the voltage between the ON/OFF pin and the -Vin
pin of the converter. The ON/OFF pin is pulled up
internally, so no external voltage source is required.
The user should avoid connecting a resistor between
the ON/OFF pin and the +Vin pin.
REV. JUL 23, 2003
Figure 8. HHS60 Series Negative Trim Schematic
Page 5 of 9
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