GE
Data Sheet
EHHD020A0FHammerhead™ Series; DC-DC Converter Power Modules
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Features
RoHS Compliant
▪
Compliant to RoHS II EU “Directive 2011/65/EU and amended
Directive (EU) 2015/863. (-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 Vdc
▪
Tightly regulated output
▪
Remote sense
▪
Output Voltage adjust: 80% to 110% of VO,nom
Applications
▪
Constant switching frequency
▪
▪
Positive remote On/Off logic
▪
Input under/over voltage protection
Distributed Power Architectures
▪
Wireless Networks
▪
▪
Access and Optical Network Equipment
Output overcurrent and overvoltage protection
▪
Overtemperature protection
▪
Industrial Equipment
▪
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* 62368-1 and CAN/CSA† C22.2 No. 62368-1
Recognized, DIN VDE‡ 0868-1/A11:2017 (EN623681:2014/A11:2017)
▪
CE mark meets 2014/35/EU directive§
▪
Meets the voltage and current requirements for ETSI 300-1322 and complies with and licensed for Basic insulation rating
▪
2250 Vdc Isolation tested in compliance with IEEE 802.3¤ PoE
standards
▪
ISO**9001 and ISO 14001 certified manufacturing facilities
Options
▪
Negative Remote On/Off logic (preferred)
▪
Over current/Over temperature/Over voltage protections
(Auto-restart) (preferred)
▪
Heat plate versions (-H)
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 18-75Vdc. The
EHHD020A0F provides 3.3Vdc nominal output voltage rated for 20Adc 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 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=24Vdc or at VIN=48Vdc. 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 21, 2021
©2012 General Electric Company. All rights reserved.
Page 1
Data Sheet
GE
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Absolute Maximum Ratings
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
Device
Symbol
Min
Max
Unit
Continuous
All
VIN
-0.3
80
Vdc
Transient, operational (≤100 ms)
All
VIN,trans
-0.3
100
Vdc
All
TA
-40
85
°C
-18H, H
TC
-40
110
°C
Storage Temperature
All
Tstg
-55
125
°C
Altitude*
All
4000
m
I/O Isolation voltage (100% factory Hi-Pot tested)
All
2250
Vdc
Input Voltage
Operating Ambient Temperature
Maximum Heat Plate Operating Temperature
(see Thermal Considerations section)
⎯
⎯
* 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
(VIN= VIN, min to VIN, max, VO= VO, set, IO=IO, max)
Input No Load Current
(VIN = 48V, IO = 0, module enabled)
Input Stand-by Current
Device
Symbol
Min
Typ
Max
Unit
All
VIN
18
24/48
75
Vdc
All
IIN
4.4
5.0
Adc
All
IIN,No load
70
IIN,stand-by
5
All
(VIN = 48V, module disabled)
I2t
mA
8
mA
0.5
A2s
Inrush Transient
All
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 1μH source impedance; VIN, min to VIN, max, IO= IOmax ; See
Test configuration section)
All
30
mAp-p
Input Ripple Rejection (120Hz)
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 21, 2021
©2012 General Electric Company. All rights reserved.
Page 2
Data Sheet
GE
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Electrical Specifications (continued)
Parameter
Nominal Output Voltage Set-point
VIN= 24V to 48V IO=IO, max, TA=25°C)
Output Voltage
(Over all operating input voltage, resistive load, and temperature
conditions until end of life)
Output Regulation
Line (VIN=VIN, min to VIN, max)
Load (IO=IO, min to IO, max)
Temperature (Tref=TA, min to TA, max)
Output Ripple and Noise
(VIN=VIN, min to VIN, max, IO= IO, max , TA=TA, min to TA, max)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
Device
Symbol
Min
Typ
Max
Unit
All
VO, set
3.24
3.30
3.36
Vdc
All
VO
3.20
⎯
3.40
Vdc
All
All
All
⎯
⎯
⎯
⎯
⎯
⎯
±0.2
±0.2
±1.0
% VO, set
% VO, set
% VO, set
All
⎯
10
30
mVrms
All
⎯
35
100
mVpk-pk
⎯
5,000
μF
20
Adc
26
Adc
External Capacitance
All
CO, max
0
Output Current
All
IO
0
All
IO, lim
21
All
IO, s/c
5
Arms
VIN=24V, TA=25°C, IO=10A, VO = 3.3V
All
η
91.0
%
VIN=24V, TA=25°C, IO=20A, VO = 3.3V
All
η
91.0
%
VIN=48V, TA=25°C, IO=10A, VO = 3.3V
All
η
89.5
%
VIN=48V, TA=25°C, IO=20A, VO = 3.3V
All
η
91.0
%
All
fsw
300
kHz
All
Vpk
⎯
5
⎯
% VO, set
All
ts
⎯
200
⎯
s
Device
Symbol
Min
Typ
Max
Unit
Isolation Capacitance
All
Ciso
⎯
1000
⎯
pF
Isolation Resistance
All
Riso
100
⎯
⎯
MΩ
I/O Isolation Voltage (100% factory Hi-pot tested)
All
All
⎯
⎯
2250
Vdc
Device
Symbol
Min
Typ
Max
Calculated Reliability based upon Telcordia SR-332 Issue 2: Method I
Case 3 (IO=80%IO, max, TA=40°C, airflow = 200 lfm, 90% confidence)
All
FIT
317.3
109/Hours
All
MTBF
3,151,604
Hours
Weight (Open Frame)
All
19 (0.7)
g (oz.)
Weight (with Heatplate)
All
30 (1.1)
g (oz.)
Output Current Limit Inception (Hiccup Mode )
(VO= 90% of VO, set)
Output Short-Circuit Current
(VO≤250mV) ( Hiccup Mode )
Efficiency
Switching Frequency
24
Dynamic Load Response
(dIo/dt=0.1A/s; VIN = 24V or 48V; TA=25°C; CO>100μF)
Load Change from Io= 50% to 75% or 25% to 50% of Io,max
Peak Deviation
Settling Time (Vo100μF.
OUTPUT VOLTAGE
VO (V) (1V/div)
OUTPUT VOLTAGE
VO (V) (50mV/div)
On/Off VOLTAGE
VOn/Off (V) (2V/div)
Figure 1. Converter Efficiency versus Output Current.
TIME, t (10ms/div)
TIME, t (2s/div)
Figure 5. Typical Start-up Using Remote On/Off, negative logic
version shown (VIN = 24V or 48V, Io = Io,max).
OUTPUT VOLTAGE
VO (V) (1V/div)
OUTPUT VOLTAGE
VO (V) (100mV/div)
INPUT VOLTAGE
VIN (V) (10V/div)
OUTPUT CURRENT
Io(A) (5A/div)
Figure 2. Typical output ripple and noise (Io = Io,max).
TIME, t (200µs/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, CO>100μF.
April 21, 2021
Figure 6. Typical Start-up Using Input Voltage (VIN = 24V, Io =
Io,max).
©2012 General Electric Company. All rights reserved.
Page 5
Data Sheet
GE
EHHD020A0F Hammerhead™ Series; DC-DC Converter Power Modules
18-75Vdc Input; 3.3Vdc, 20.0A, 66W Output
Test Configurations
Design Considerations
Input Filtering
CURRENT PROBE
TO OSCILLOSCOPE
LTEST
Vin+
BATTERY
12μH
33-100μF
CS
220μF
E.S.R.