GE
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Data Sheet
EHHD020A0FHammerhead™ Series; DC-DC Converter Power Modules
Features
Compliant to RoHS II EU “Directive 2011/65/EU (-Z versions)
Compliant to REACH Directive (EC) No 1907/2006
Flat and high efficiency curve
Industry standard, DOSA compliant footprint
57.9mm x 22.8mm x 7.6mm
(2.28 in x 0.9 in x 0.30 in)
Low profile height and reduced component skyline
Ultra wide input voltage range: 18-75 V
dc
Tightly regulated output
Remote sense
Output Voltage adjust: 80% to 110% of V
O,nom
Constant switching frequency
Positive remote On/Off logic
Input under/over voltage protection
Output overcurrent and overvoltage protection
Overtemperature protection
No reverse current during output shutdown
Wide operating temperature range (-40°C to 85°C)
Suitable for cold wall cooling using suitable Gap Pad applied
directly to top side of module
ANSI/UL*60950-1-2011 and CAN/CSA† C22.2 No. 60950-1-
07, Second Edition + A1:2011 (MOD), dated March 19, 2011;
and DIN EN 60950-1 (VDE‡ 0805 Teil 1):2011-01; EN 60950-
1:2006 + A11:2009 + A1:2010, DIN EN 60950-1/A12 (VDE
0805-1/A12):2011-08; EN 60950-1/A12:2011-02, IEC 60950-
1(ed.2);am1:2009
CE mark meets 2006/95/EC directive
§
Meets the voltage and current requirements for ETSI 300-
132-2 and complies with and licensed for Basic insulation
rating per EN60950-1
2250 Vdc Isolation tested in compliance with IEEE 802.3
¤
PoE
standards
ISO
**
9001 and ISO 14001 certified manufacturing facilities
RoHS Compliant
Applications
Distributed Power Architectures
Wireless Networks
Access and Optical Network Equipment
Industrial Equipment
Options
Negative Remote On/Off logic (preferred)
Over current/Over temperature/Over voltage protections
(Auto-restart) (preferred)
Heat plate versions (-H)
Surface Mount version (-S)
Description
The EHHD020A0F [Hammerhead™] Series, eighth-brick, low-height power modules are isolated dc-dc converters
that provide a single, precisely regulated output voltage over an ultra wide input voltage range of 18-75V
dc
. The
EHHD020A0F provides 3.3V
dc
nominal output voltage rated for 20A
dc
output current. The module incorporates GE’s vast heritage
for reliability and quality, while also using the latest in technology, and component and process standardization to achieve highly
competitive cost. The open frame module construction, available in both surface-mount and through-hole packaging, enable
designers to develop cost and space efficient solutions. The module achieves typical full load efficiency greater than 91% at
V
IN
=24V
dc
or at V
IN
=48V
dc
. Standard features include remote On/Off, remote sense, output voltage adjustment, overvoltage,
overcurrent and overtemperature protection. An optional heat plate allows for external standard, eighth-brick heat sink
attachment to achieve higher output current in high temperature applications.
*
UL
is a registered trademark of Underwriters Laboratories, Inc.
†
‡
CSA
is a registered trademark of Canadian Standards Association.
VDE
is a trademark of Verband Deutscher Elektrotechniker e.V.
§
This product is intended for integration into end-user equipment . All of the required procedures of end-use equipment should be followed.
¤ IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated.
** ISO is a registered trademark of the International Organization of Standards
April 4, 2013
©2012 General Electric Company. All rights reserved.
Page 1
GE
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Absolute Maximum Ratings
Data Sheet
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings
only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations
sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the device reliability.
Parameter
Input Voltage
Continuous
Transient, operational (≤100 ms)
Operating Ambient Temperature
Maximum Heat Plate Operating Temperature
(see Thermal Considerations section)
Storage Temperature
Altitude*
I/O Isolation voltage (100% factory Hi-Pot tested)
All
All
All
T
stg
-55
125
4000
2250
°C
m
V
dc
All
All
All
-18H, H
V
IN
V
IN,trans
T
A
T
C
-0.3
-0.3
-40
-40
80
100
85
110
V
dc
V
dc
°C
°C
Device
Symbol
Min
Max
Unit
* For higher altitude applications, contact your GE Sales Representative for alternative conditions of use.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(V
IN
= V
IN, min
to V
IN, max
, V
O
= V
O, set
, I
O
=I
O, max
)
Input No Load Current
(V
IN
= 48V, I
O
= 0, module enabled)
Input Stand-by Current
(V
IN
= 48V, module disabled)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; V
IN, min
to V
IN, max,
I
O
= I
Omax
; See
Test configuration section)
Input Ripple Rejection (120Hz)
All
Device
All
All
All
All
Symbol
V
IN
I
IN
I
IN,No load
I
IN,stand-by
I
2
t
Min
18
Typ
24/48
4.4
70
5
8
0.5
Max
75
5.0
Unit
V
dc
A
dc
mA
mA
A
2
s
All
30
mA
p-p
All
50
dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part
of sophisticated power architectures. To preserve maximum flexibility, internal fusing is not included, however, to achieve
maximum safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a
maximum rating of 10 A (see Safety Considerations section). Based on the information provided in this data sheet on inrush energy
and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data sheet
for further information.
April 4, 2013
©2012 General Electric Company. All rights reserved.
Page 2
GE
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Electrical Specifications
(continued)
Parameter
Nominal Output Voltage Set-point
V
IN
= 24V to 48V I
O
=I
O, max
, T
A
=25°C)
Output Voltage
(Over all operating input voltage, resistive load, and temperature
conditions until end of life)
Output Regulation
Line (V
IN
=V
IN, min
to V
IN, max
)
Load (I
O
=I
O, min
to I
O, max
)
Temperature (T
ref
=T
A, min
to T
A, max
)
Output Ripple and Noise
(V
IN
=V
IN, min
to V
IN, max
, I
O
= I
O, max
, T
A
=T
A, min
to T
A, max
)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance
Output Current
Output Current Limit Inception (Hiccup Mode )
(V
O
= 90% of V
O, set
)
Output Short-Circuit Current
(V
O
≤250mV)
( Hiccup Mode )
Efficiency
V
IN
=24V, T
A
=25°C, I
O
=10A, V
O
= 3.3V
V
IN
=24V, T
A
=25°C, I
O
=20A, V
O
= 3.3V
V
IN
=48V, T
A
=25°C, I
O
=10A, V
O
= 3.3V
V
IN
=48V, T
A
=25°C, I
O
=20A, V
O
= 3.3V
Switching Frequency
Dynamic Load Response
(dI
o
/dt=0.1A/s; V
IN
= 24V or 48V; T
A
=25°C; C
O
>100μF)
Load Change from Io= 50% to 75% or 25% to 50% of I
o,max
Peak Deviation
Settling Time (Vo<10% peak deviation)
All
All
V
pk
t
s
Device
All
All
Symbol
V
O, set
V
O
Min
3.24
3.20
Data Sheet
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
Typ
3.30
Max
3.36
3.40
Unit
V
dc
V
dc
All
All
All
±0.2
±0.2
±1.0
% V
O, set
% V
O, set
% V
O, set
All
All
All
All
All
All
C
O, max
I
O
I
O, lim
I
O, s/c
0
0
21
10
35
30
100
5,000
20
mV
rms
mV
pk-pk
μF
A
dc
A
dc
A
rms
24
5
26
All
All
All
All
All
η
η
η
η
f
sw
91.0
91.0
89.5
91.0
300
%
%
%
%
kHz
5
200
% V
O, set
s
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
I/O Isolation Voltage (100% factory Hi-pot tested)
Device
All
All
All
Symbol
C
iso
R
iso
All
Min
100
Typ
1000
Max
2250
Unit
pF
MΩ
V
dc
General Specifications
Parameter
Calculated Reliability based upon Telcordia SR-332 Issue 2: Method
I
Case 3 (I
O
=80%I
O, max
, T
A
=40°C, airflow = 200 lfm, 90% confidence)
Weight (Open Frame)
Weight (with Heatplate)
Device
All
All
All
All
Symbol
FIT
MTBF
Min
Typ
317.3
3,151,604
19 (0.7)
30 (1.1)
Max
Unit
10
9
/Hours
Hours
g (oz.)
g (oz.)
April 4, 2013
©2012 General Electric Company. All rights reserved.
Page 3
GE
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Feature Specifications
Data Sheet
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter
Remote On/Off Signal Interface
(V
IN
=V
IN, min
to V
IN, max
; open collector or equivalent,
Signal referenced to V
IN-
terminal)
Negative Logic: device code suffix “1”
Logic Low = module On, Logic High = module Off
Positive Logic: No device code suffix required
Logic Low = module Off, Logic High = module On
Logic Low - Remote On/Off Current
Logic Low - On/Off Voltage
Logic High Voltage – (Typ = Open Collector)
Logic High maximum allowable leakage current
Turn-On Delay and Rise Times
(I
O
=I
O, max ,
V
IN
=V
IN, nom,
T
A
= 25
o
C)
Case 1: Input power is applied for at least 1 second,
and then the On/Off input is set from OFF to ON
(T
delay
= on/off pin transition until V
O
= 10% of V
O, set
)
Case 2: On/Off input is set to Logic Low (Module
ON) and then input power is applied
(T
delay
= V
IN
reaches V
IN, min
until V
o
=10% of V
O,set
)
Output voltage Rise time (time for V
o
to rise from 10%
of V
o,set
to 90% of V
o, set
)
Output voltage overshoot – Startup
I
O
= I
O, max
; V
IN
=V
IN, min
to V
IN, max
, T
A
= 25
o
C
Remote Sense Range
Output Voltage Adjustment Range
Output Overvoltage Protection
Overtemperature Protection – Hiccup Auto Restart
Open
frame
Heat
Plate
All
T
ref
T
ref
V
UVLO
14
1
All
V
OVLO
76
1
79
81
2
83
Vdc
Vdc
Vdc
17
15
2
18
16
V
dc
V
dc
V
dc
135
120
O
Device
Symbol
Min
Typ
Max
Unit
All
All
All
All
I
on/off
V
on/off
V
on/off
I
on/off
-0.7
2.5
0.15
0.6
6.7
25
mA
V
dc
V
dc
μA
All
T
delay
—
20
—
msec
All
All
All
All
All
All
T
delay
T
rise
—
—
20
18
—
150
25
3
10
msec
msec
% V
O, set
% V
O, set
% V
O, set
V
dc
V
SENSE
80
V
O, limit
3.8
110
4.3
C
C
Heat Plate
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
Input Overvoltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
O
April 4, 2013
©2012 General Electric Company. All rights reserved.
Page 4
GE
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Characteristic Curves
Data Sheet
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
The following figures provide typical characteristics for the EHHD020A0F (3.3V, 20A) at 25
o
C. The figures are identical for either
positive or negative remote On/Off logic.
OUTPUT CURRENT
Io(A) (5A/div)
EFFICIENCY,
(%)
OUTPUT CURRENT, I
O
(A)
OUTPUT VOLTAGE
V
O
(V) (100mV/div)
TIME, t (200µs/div)
Figure 1. Converter Efficiency versus Output Current.
Figure 4. Transient Response to 0.1A/µS Dynamic Load
Change from 50% to 75% to 50% of full load, Vin=48V,
C
O
>100μF.
On/Off VOLTAGE
V
On/Off
(V) (2V/div)
OUTPUT VOLTAGE
V
O
(V) (1V/div)
OUTPUT VOLTAGE
V
O
(V) (50mV/div)
TIME, t (2s/div)
TIME, t (10ms/div)
Figure 2. Typical output ripple and noise (I
o
= I
o,max
).
Figure 5. Typical Start-up Using Remote On/Off, negative
logic version shown (V
IN
= 24V or 48V, I
o
= I
o,max
).
OUTPUT CURRENT
Io(A) (5A/div)
OUTPUT VOLTAGE
V
O
(V) (100mV/div)
TIME, t (200µs/div)
OUTPUT VOLTAGE
V
O
(V) (1V/div)
INPUT VOLTAGE
V
IN
(V) (10V/div)
TIME, t (10ms/div)
Figure 3. Transient Response to 0.1A/µS Dynamic Load Change
from 50% to 75% to 50% of full load, Vin=24V, C
O
>100μF.
Figure 6. Typical Start-up Using Input Voltage (V
IN
= 24V, I
o
= I
o,max
).
April 4, 2013
©2012 General Electric Company. All rights reserved.
Page 5
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