GE
36-75Vdc Input; 12Vdc, 2.5A Output
Features
Data Sheet
KSTW002A5B Barracuda* Series; DC-DC Converter Power Modules
Compliant to REACH Directive (EC) No 1907/2006
Compliant to RoHS II EU “Directive 2011/65/EU”
Ultra-wide Input Voltage Range, 36V
dc
to 75V
dc
No minimum load
High efficiency – 90% at full load (V
IN
=48V
dc
)
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)
RoHS Compliant
Applications
Wireless Networks
Hybrid power architectures
Optical and Access Network Equipment
Enterprise Networks including Power over Ethernet (PoE)
Industrial markets
Surface mount (SMT) or Through hole (TH)
Reflow process compliant, both SMT and TH versions
Positive Remote On/Off logic
Output overcurrent/voltage protection (hiccup)
Over-temperature protection
Output Voltage adjust: 80% to 110% of V
o,nom
Wide operating temperature range (-40°C to 85°C)
ANSI/ UL
#
60950-1-2011 Recognized, CAN/CSA† C22.2
No.60950-1-07, Second Edition + A1:2011 (MOD) Certified
IEC 60950-1:2005 (2nd edition) + A1:2009 and EN 60950-
1:2006 +A11:2009 +A1:2010 +A12:2011, and VDE‡0805
(EN60950-1 3rd edition) Licensed
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
Options
Negative Remote On/Off logic (preferred)
Surface Mount/Tape and Reel (-SR Suffix)
Auto-restart Over current/Over voltage protections
(preferred)
Shorter through hole pin trim
Description
The KSTW002A5B series power modules are isolated DOSA compliant 1/16
th
brick dc-dc converters that operate over a wide
input voltage range of 36 V
dc
-75V
dc
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
*Trademark of General Electric Corporation
#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.
September 26, 2013
©2013 General Electric Corporation. All rights reserved.
Page 1
GE
36-75Vdc Input; 12Vdc, 2.5A Output
Absolute Maximum Ratings
Data Sheet
KSTW002A5B Barracuda* 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 (100ms)
Operating Ambient 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
Vdc
Device
All
All
All
Symbol
V
IN
V
IN, trans
T
A
Min
-0.3
-0.3
-40
Max
80
100
85
Unit
Vdc
Vdc
°C
* For higher altitude applications, contact your GE Sales Representative for alternative conditions of use.
Electrical Specifications
Unless otherwise indicated, specifications apply at V
IN
= 48V
dc
, resistive load, and T
A
= 25°C conditions.
Parameter
Operating Input Voltage
Input No Load Current
(V
IN
= 48V
dc
I
O
= 0A, module enabled)
Input Stand-by Current
(V
IN
= 36 to 48V
dc
, module disabled)
Maximum Input Current (V
IN
=36V
dc
, I
O
= I
O,MAX
)
Inrush Transient
Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance; V
IN
=36V to 75V
dc
, I
O
= I
Omax
;
see Test configuration section)
Input Ripple Rejection (120Hz)
EMC, EN55022
Device
All
All
All
All
All
All
All
Symbol
V
IN
I
IN,No load
I
IN,stand-by
I
IN, MAX
I
2
t
25
60
See EMC Considerations section
Min
36
Typ
48
45
8
1.2
0.05
Max
75
Unit
V
dc
mA
mA
A
dc
A
2
s
mA
p-p
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 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 3A
(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.
September 26, 2013
©2013 General Electric Corporation. All rights reserved.
Page 2
GE
36-75Vdc Input; 12Vdc, 2.5A Output
Electrical Specifications
(continued)
Data Sheet
KSTW002A5B Barracuda ™ Series; DC-DC Converter Power Modules
Unless otherwise indicated, specifications apply at V
IN
= 48Vdc, resistive load, and T
A
= 25°C conditions.
Parameter
Output Voltage Set-point
(V
IN
= 48V
dc
, I
O
=I
O, 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 (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 on nominal output
Measured with 10uF Tantalum||1uF ceramic
(V
IN
= 48V
dc
, I
O
=80%I
O, max
)
RMS (5Hz to 20MHz bandwidth)
Peak-to-Peak (5Hz to 20MHz bandwidth)
External Capacitance (see Note 1 in Feature Specifications)
Output Current
(V
IN
=36V to 75V)
Output Current Limit Inception (Hiccup Mode)
(V
IN
=36V to 75V)
Output Short-Circuit Current (V
O
≤ 250 mV)
Efficiency (V
IN
=48V
dc
, I
O
=I
O, max
)
Switching Frequency (Fixed)
V
IN
=36 to 48V
dc
, I
O
= I
O, max
Dynamic Load Response
(Io/t=0.1A/s)
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
2
200
% V
O, set
s
All
All
All
All
I
O, lim
I
O, s/c
η
f
sw
2.7
2.7
90
350
3.8
A
dc
A
rms
%
kHz
Device
All
All
All
All
All
All
All
0.05
0.05
Symbol
V
O, set
V
O
V
O, adj
Min
11.82
-3.0
-20
Typ
12.00
Max
12.18
+3.0
+10
+10
0.2
0.2
1.0
Unit
V
dc
% V
O, set
% V
O, set
% V
O, set
% V
O, set
% V
O, set
% V
O, set
All
All
All
C
O, max
I
o
0
0
30
100
2200
2.5
mV
rms
mV
pk-pk
μF
A
dc
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
I/O Isolation Voltage
Symbol
C
iso
R
iso
All
Min
10
2250
Typ
1000
Max
Unit
pF
MΩ
Vdc
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
FIT
MTBF
Min
Typ
>270
>3,600,000
13 (0.46)
Max
Unit
10
9
/Hours
Hours
g (oz.)
September 26, 2013
©2013 General Electric Corporation. All rights reserved.
Page 3
GE
36-75Vdc Input; 12Vdc, 2.5A Output
Data Sheet
KSTW002A5B Barracuda* Series; DC-DC Converter Power Modules
Feature Specifications
Unless otherwise indicated, specifications apply at V
IN
= 48V
dc
, resistive load, and T
A
= 25°C 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 (V
on/off
= -0.7V
dc
)
Logic Low - On/Off Voltage
Logic High Voltage (I
on/off
= 0A
dc
)
Logic High maximum allowable leakage current
Turn-On Delay and Rise Times
(I
O
=80% of I
O, max
)
Case 1: Input power is applied for at least 1second, 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 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
(I
O
=80% of I
O, max
, V
IN
= 48V
dc
)
Output Overvoltage Protection (see Note1 below)
Input Undervoltage Lockout
Turn-on Threshold
Turn-off Threshold
Hysteresis
All
All
All
V
uv/on
V
uv/off
V
hyst
30
34
32
2.0
36
V
dc
V
dc
V
dc
All
V
O, limit
14
All
T
delay
Case1
Device
Symbol
Min
Typ
Max
Unit
All
All
All
All
I
on/off
V
on/off
V
on/off
I
on/off
-0.7
2.4
0.15
0.8
7
25
mA
V
dc
V
dc
μA
30
50
ms
All
T
delay
Case2
20
50
ms
All
T
rise
5
10
3
17
ms
% V
O, set
V
dc
Note: 1.The module requires a minimum of 220 μF external output capacitor to avoid exceeding the OVP maximum limits during startup into open
loop fault conditions.
September 26, 2013
©2013 General Electric Corporation. All rights reserved.
Page 4
GE
36-75Vdc Input; 12Vdc, 2.5A Output
Characteristic Curves
Data Sheet
KSTW002A5B Barracuda* Series; DC-DC Converter Power Modules
The following figures provide typical characteristics for the KSTW002A5B (12.0V, 2.5A) at 25
o
C. The figures are identical for either
positive or negative remote On/Off logic.
EFFICIENCY,
(%)
OUTPUT CURRENT, I
O
(A)
INPUT CURRENT, I
IN
(A)
INPUT VOLTAGE, V
IN
(V)
Figure 1. Converter Efficiency versus Output Current.
Figure 2. Converter Input Current versus Input Voltage.
OUTPUT CURRENT OUTPUT VOLTAGE
V
O
(V) (200mV/div)
Io(A) (1A/div)
OUTPUT VOLTAGE
V
O
(V) (100mV/div)
TIME, t (2s/div)
TIME, t (200µs/div)
Figure 3. Typical output ripple and noise (I
o
= I
o,max
).
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
OUTPUT VOLTAGE
V
O
(V) (5V/div )
On/Off VOLTAGE
V
On/Off
(V) (2V/div)
OUTPUT VOLTAGE
V
O
(V) (5V/div)
TIME, t (10ms/div)
INPUT VOLTAGE
V
IN
(V) (20V/div)
TIME, t (10ms/div)
Figure 5.Typical Start-up Using Remote On/Off, negative
logic version shown (V
IN
= 48V, Io = I
o,max
).
Figure 6. Typical Start-up Using Input Voltage (V
IN
= 48V, I
o
=
I
o,max
).
September 26, 2013
©2013 General Electric Corporation. All rights reserved.
Page 5
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