Data Sheet
GE
KSTW004A2B Barracuda™ Series; DC-DC Converter Power Modules
36-75Vdc Input; 12Vdc, 4.2A, 50W Output
RoHS Compliant
Features
▪ 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
▪ Compliant to IPC-9592A (September2008), Category 2, Class II
▪ Ultra-wide Input Voltage Range, 36Vdc to 75Vdc
▪ No minimum load
▪ High efficiency – 90% at full load (VIN=48Vdc)
▪ Constant switching frequency
▪ Low output ripple and noise
▪ Small Size and low profile, follows DOSA standard 1/16th
footprint
33.0 mm x 22.9 mm x 9.3 mm
(1.30 in x 0.9 in x 0.37 in)
Applications
▪ Wireless Networks
• Surface mount (SMT) or Through hole (TH)
▪ Hybrid power architectures
▪ Reflow process compliant, both SMT and TH versions
▪ Optical and Access Network Equipment
▪ Enterprise Networks including Power over Ethernet (PoE)
▪ Industrial markets
▪ Positive Remote On/Off logic
▪ Output overcurrent/voltage protection (hiccup)
▪ Over-temperature protection
▪ Output Voltage adjust: 80% to 110% of Vo,nom
Options
▪ Wide operating temperature range (-40°C to 85°C)
▪ Negative Remote On/Off logic (preferred)
▪ ANSI/UL* 62368-1 and CAN/CSA† C22.2 No. 62368-1 Recognized,
DIN VDE‡ 0868-1/A11:2017 (EN62368-1:2014/A11:2017)
▪ Surface Mount/Tape and Reel (-SR Suffix)
▪ Auto-restart Over current/Over voltage protections
(preferred)
▪ Shorter through hole pin trim
▪ CE mark meets 2014/35/EU directive§
▪ Meets the voltage and current requirements for ETSI 300-132-2
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
Description
The KSTW004A2B series power modules are isolated DOSA compliant 1/16th brick dc-dc converters that operate over an ultra-wide
input voltage range of 36 Vdc -75Vdc and provide a single precisely regulated output voltage at 12Vdc. The output is fully isolated from
the input, allowing versatile polarity configurations and grounding connections. The modules exhibit high efficiency of 90% typical at
full load. Built-in filtering for both input and output minimizes the need for external filtering. The module is fully self-protected with
output over-current and over-voltage, over-temperature and input under voltage shutdown control. Optional features include
negative or positive on/off logic and SMT connections.
* 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 28, 2021
©2012 General Electric Company. All rights reserved.
Page 1
Data Sheet
GE
KSTW004A2B Barracuda™ Series; DC-DC Converter Power Modules
36-75Vdc Input; 12Vdc, 4.2A, 50W 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
All
VIN
-0.3
80
Vdc
All
VIN, trans
-0.3
100
Vdc
All
TA
-40
85
°C
Storage Temperature
All
Tstg
-55
125
°C
I/O Isolation Voltage (100% factory Hi-Pot tested)
All
⎯
⎯
2250
Vdc
Input Voltage (Continuous)
Transient (100ms)
Operating Ambient Temperature
(see Thermal Considerations section)
Electrical Specifications
Unless otherwise indicated, specifications apply at VIN = 48Vdc, resistive load, and TA = 25°C conditions.
Parameter
Device
Symbol
Min
Typ
Max
Unit
All
VIN
36
48
75
Vdc
All
IIN,No load
40
50
mA
All
IIN,stand-by
8
Maximum Input Current (VIN=36Vdc, IO= IO,MAX)
All
IIN, MAX
1.6
Adc
Inrush Transient
All
I2t
0.05
A2s
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; VIN=0V to 75Vdc, IO= IOmax ; see
Test configuration section)
All
30
mAp-p
Input Ripple Rejection (120Hz)
All
60
dB
Operating Input Voltage
Input No Load Current
(IO = 0A, module enabled)
Input Stand-by Current
(VIN = 48Vdc, module disabled)
EMC, EN55032
mA
See EMC Considerations section
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 being part of complex
power architecture. 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 6A (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 28, 2021
©2012 General Electric Company. All rights reserved.
Page 2
Data Sheet
GE
KSTW004A2B Barracuda™ Series; DC-DC Converter Power Modules
36-75Vdc Input; 12Vdc, 4.2A, 50W Output
Electrical Specifications (continued)
Unless otherwise indicated, specifications apply at VIN = 48Vdc, resistive load, and TA = 25°C conditions.
Parameter
Output Voltage Set-point
(VIN=48Vdc, IO=IO, max,)
Output Voltage
(Over all operating input voltage, resistive load, and temperature
conditions until end of life)
Adjustment Range
Selected by external resistor
Remote Sense Range
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 on nominal output
Measured with 10uF Tantalum||1uF ceramic
(VIN=48Vdc, IO=80%IO, max)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance (see Note 1 in Feature Specifications)
Output Current
Device
Symbol
Min
Typ
Max
Unit
All
VO, set
11.82
12.00
12.36
Vdc
All
VO
-3.0
⎯
+3.0
% VO, set
All
VO, adj
-20
+10
% VO, set
+10
% VO, set
All
All
All
All
⎯
⎯
⎯
0.05
0.05
⎯
0.2
0.2
1.0
% VO, set
% VO, set
% VO, set
40
150
2200
4.2
mVrms
mVpk-pk
μF
Adc
All
All
CO, max
Io
⎯
⎯
0
0
Output Current Limit Inception (Hiccup Mode)
All
IO, lim
4.6
⎯
⎯
⎯
⎯
⎯
5.9
Adc
Output Short-Circuit Current (VO ≤ 250 mV)
All
IO, s/c
⎯
2.5
⎯
Arms
Efficiency (VIN=48Vdc, IO=IO, max)
All
η
89.0
90.0
⎯
%
All
fsw
⎯
350
⎯
kHz
Peak Deviation
All
Vpk
⎯
3.0
⎯
% VO, set
Settling Time (Vo100μF
INPUT VOLTAGE
VIN (V) (20V/div)
On/Off VOLTAGE
VOn/Off (V) (2V/div)
OUTPUT VOLTAGE
VO (V) (5V/div )
OUTPUT VOLTAGE
VO (V) (5V/div)
Figure 3. Typical output ripple and noise (Io = Io,max).
TIME, t (10ms/div)
Figure 5.Typical Start-up Using Remote On/Off, negative logic
version shown (VIN = 48V, Io = Io,max).
April 28, 2021
TIME, t (10ms/div)
Figure 6. Typical Start-up Using Input Voltage (VIN = 48V, Io =
Io,max).
©2012 General Electric Company. All rights reserved.
Page 5
Data Sheet
GE
KSTW004A2B Barracuda™ Series; DC-DC Converter Power Modules
36-75Vdc Input; 12.0Vdc, 4.2A, 50W Output
Test Configurations
Design Considerations
CURRENT PROBE
TO OSCILLOSCOPE
Vin+
BATTERY
12μH
CS
220μF
Input Source Impedance
The power module should be connected to a low ac-impedance
source. Highly inductive source impedance can affect the stability
of the power module. For the test configuration in Figure 7, a
33μF electrolytic capacitor (ESR