Data Sheet
August 22, 2011
KNW013-020 (Sixteenth-Brick) Power Modules; DC-DC Converters
36 –75Vdc Input; 3.3 to 5.0Vdc Output; 13A to 20A Output Current
¤ IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated.
* 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-use equipment. All of the required procedures of end-use equipment should be followed.
** ISO is a registered trademark of the International Organization of Standards
Document No: DS08-009 ver. 1.05
PDF name: knw013-020_ds.pd
f
Features
Compliant to RoHS EU Directive 2002/95/EC (-Z
versions)
Compliant to RoHS EU Directive 2002/95/EC with
lead solder exemption (non-Z versions)
Delivers up to 20A output current
5V(13A), 3.3V(20A)
High efficiency – 91% at 3.3V full load
Small size and low profile:
33.0 mm x 22.9 mm x 10.2 mm
(1.30 in x 0.9 in x 0.40 in)
Industry standard DOSA footprint
-20% to +10% output voltage adjustment trim
Remote on/off
Remote sense
No reverse current during output shutdown
Over temperature protection (latching)
Output overcurrent/overvoltage protection
(latching)
Wide operating temperature range (-40°C to 85°C)
2250 Vdc Isolation tested in compliance with IEEE
802.3¤ PoE standards
Meets the voltage isolation requirements for
ETSI 300-132-2 and complies with and is licensed
for Basic Insulation rating per EN60950-1
UL*Recognized to UL60950-1, CAN/CSA† C22.2
No.60950-1, and EN60950-1(
VDE
‡ 0805-1)
Licensed
CE mark meets 2006/95/EC directive§
ISO** 9001 and ISO 14001 certified manufacturing
facilities
Applications
Distributed power architectures
Wireless networks
Access and optical networking equipment
including Power over Ethernet (PoE)
Enterprise networks
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor powered applications
Options
Negative Remote On/Off logic
Surface Mount (Tape and Reel, -SR Suffix)
Over current/Over temperature/Over voltage
protections (auto-restart)
Shorter lead trim
Description
The KNW (Sixteenth-brick) series power modules are isolated dc-dc converters that operate over a wide input
voltage range of 36 to 75Vdc and provide a single precisely regulated output. The output is fully isolated from the
input, allowing versatile polarity configurations and grounding connections. The modules exhibit high efficiency,
typical efficiency of 91% for 3.3V/20A. These open frame modules are available either in surface-mount (-SR) or in
through-hole (TH) form.
RoHS Compliant
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 2
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
Operating Input Voltage
Continuous All VIN -0.3 80 Vdc
Transient (100 ms) All VIN,trans -0.3 100 Vdc
Operating Ambient Temperature All TA -40 85 °C
(see Thermal Considerations section)
Storage Temperature All Tstg -55 125 °C
I/O Isolation voltage (100% Factory Hi-Pot tested) All 2250 Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Parameter Device Symbol Min Typ Max Unit
Operating Input Voltage All VIN 36 48 75 Vdc
Maximum Input Current All IIN,max 1.7 2.4
Adc
(VIN= VIN, min to VIN, max, IO=IO, max)
Input No Load Current All IIN,No load 45 mA
(VIN = VIN
,
nom, IO = 0, module enabled)
Input Stand-by Current All IIN,stand-by 6 8 mA
(VIN = VIN, nom, module disabled)
Inrush Transient All I2t 0.1 A2s
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 60 dB
EMC, EN55022 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 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 time-delay fuse with a maximum rating of 5 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.
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 3
Electrical Specifications (continued)
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set-point 5.0V VO, set 4.93 5.0 5.07 Vdc
(VIN=VIN, min, IO=IO, max, TA=25°C) 3.3V VO, set 3.25 3.3 3.35 Vdc
Output Voltage
All VO -3.0 +3.0 % VO, set
(Over all operating input voltage, resistive load,
and temperature conditions until end of life)
Adjustment Range All VO, adj -20.0 +10.0 % VO, set
Selected by an external resistor
Output Regulation
Line (VIN=VIN, min to VIN, max) All
0.1 % VO, set
Load (IO=IO, min to IO, max) All
0.1 % VO, set
Temperature (Tref=TA, min to TA, max) All
1.0 % VO, set
Output Ripple and Noise on nominal output
(VIN=VIN, nom ,IO= IO, max , TA=TA, min to TA, max)
RMS (5Hz to 20MHz bandwidth) All 25 30 mVrms
Peak-to-Peak (5Hz to 20MHz bandwidth) 75 100 mVpk-pk
External Capacitance 5.0V CO, max 0 10,000 μF
3.3V CO, max 20,000 μF
Rated Output Current 5.0V IO, Rated 0 13 Adc
3.3V IO, Rated 0 20 Adc
Output Current Limit Inception (Hiccup Mode ) All IO, lim 115 120 130 %IO, Rated
(VO= 90% of VO, set)
Output Short-Circuit Current All IO, s/c 20 %IOmax
Arms
(VO≤250mV) ( Hiccup Mode )
Efficiency 5.0V η 91.0 %
VIN= VIN, nom; TA=25°C; IO=IO, max ; VO= VO,set 3.3V η 91.0 %
Switching Frequency All fsw 400 kHz
Dynamic Load Response
(dIO/dt=0.1A/s; VIN = VIN, nom; TA=25°C)
Load Change from IO= 50% to 75% or 25% to
50% of IO,max;
Peak Deviation All Vpk 4 % VO, set
Settling Time (VO<10% peak deviation) All ts 200 s
(dIO/dt=1.0A/s; VIN = VIN, nom; TA=25°C)
Load Change from IO= 50% to 75% or 25% to
50% of IO
,
max;
Peak Deviation All Vpk 5 % VO, set
Settling Time (VO<10% peak deviation) All ts 200 s
Isolation Specifications
Parameter Device Symbol Min Typ Max Unit
Isolation Capacitance All Ciso 1000 pF
Isolation Resistance All Riso 10 MΩ
I/O Isolation Voltage All All 2250 Vdc
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 4
General Specifications
Parameter De vice Symbol Min Typ Max Unit
Calculated Reliability Based upon Telcordia SR-
332 Issue 2: Method I, Case 3, (IO=80%IO, max,
T
A
=40°C, Airflow = 200 lfm), 90% confidence
5.0V MTBF 4,114,000 Hours
5.0V FIT 243.1 109/Hours
3.3V MTBF 4,589,027 Hours
3.3V FIT 217.9 109/Hours
Powered Random Vibration (VIN=VIN, min, IO=IO, max,
T
A
=25°C, 0 to 5000Hz, 10Grms) All 90 Minutes
Weight All
15.6
(0.55) g
(oz.)
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.
Parameter Device Symbol Min Typ Max Unit
Remote On/Off Signal Interface
(VIN=VIN, min to VIN, max ; open collector or equivalent,
signal referenced to VIN- 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 All Ion/off 1.0 mA
Logic Low - On/Off Voltage All Von/off -0.7 1.2 V
Logic High Voltage – (Typ = Open Collector) All Von/off 5 V
Logic High maximum allowable leakage current All Ion/off 10 μA
Turn-On Delay and Rise Times
(IO=IO, max , VIN=VIN, nom, TA = 25 oC)
Case 1: On/Off input is set to Logic Low (Module
ON) and then input power is applied (delay from
instant at which VIN = VIN, min until VO=10% of VO,set)
All Tdelay ― 13 20 msec
Case 2: Input power is applied for at least 1 second
and then the On/Off input is set from OFF to ON
(Tdelay = from instant at which VIN=VIN, min until VO =
10% of V
O, set
)
All Tdelay ― 30 35 msec
Output voltage Rise time (time for Vo to rise from
10% of VO,set to 90% of VO, set)
5.0 Trise ― 20 25 msec
3.3 Trise ― 6 10 msec
Output voltage overshoot – Startup ― 3 % VO, set
IO= IO, max; VIN=VIN, min to VIN, ma
x
, T
A
= 25 oC
Remote Sense Range All +10 % VO, set
Output Overvoltage Protection 5.0V VO, limit 6.1 7.0 Vdc
3.3V VO, limit 4.0 4.6 Vdc
Input Undervoltage Lockout
Turn-on Threshold All Vuv/on 32.5 34.0 35.8 Vdc
Turn-off Threshold All Vuv/off 30.0 31.0 33.0 Vdc
Hysterisis All Vhyst 2 Vdc
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 5
Characteristic Curves
The following figures provide typical characteristics for the KNW013A0A (5V, 13A) at 25oC. The figures are identical
for either positive or negative remote On/Off logic.
EFFICIENCY, (%)
70
75
80
85
90
95
03691215
Vin=48V
Vin=36V
Vin=75V
OUTPUT CURRENT, Io (A)
0
2
4
6
8
10
12
14
20 30 40 50 60 70 80 90
2.0 m/s
400 LFM
1.0 m/s
200 LFM
0.5 m/s
100 LFM
NC
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA
O
C
Figure 1. Converter Efficiency versus Output Current. Figure 4. Derating Output Current versus Local
Ambien t Te mp e ra t ure and A irfl ow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT VOLTAGE On/Off VOLTAGE
VO (V) (2V/div) VOn/off (V) (2V/div)
TIME, t (1s/div) TIME, t (10ms/div)
Figure 2. Typical output ripple and noise (VIN = VIN,NOM,
Io = Io,max). Figure 5. Typical Start-up Using Remote On/Off,
negative logic version shown (VIN = VIN,NOM, Io =
Io,max).
OUTPUT CURRENT OUTPUT VOLTAGE
Io (A) (10A/div) VO (V) (200mV/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (2V/div) VIN (V) (20V/div)
TIME, t (200 s /div) TIME, t (5ms/div)
Figure 3. Trans ient Response to Dynamic Load
Change, 0.1A/µS, from 75% to 50% to 75% of full load. Figure 6. Typical Start-up Using Input Voltage (VIN =
VIN,NOM, Io = Io,max).
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 6
Characteristic Curves
The following figures provide typical characteristics for the KNW020A0F (3.3V, 20A) at 25 OC. The figures are
identical for either positive or negative remote On/Off logic.
EFFICIENCY, (%)
70
75
80
85
90
95
0 5 10 15 20
Vin=48
Vin=36V
Vin=75V
OUTPUT CURRENT, Io (A)
0
5
10
15
20
20 30 40 50 60 70 80 90
2.0 m/s
400 LFM
1.0 m/s
200 LFM
0.5 m/s
100 LFM
NC
OUTPUT CURRENT, IO (A) AMBIENT TEMPERATURE, TA
O
C
Figure 7. Converter Efficiency versus Output Current. Figur e 10. Derating Output Current versus Local
Ambien t Te mp e ra t ure and A irfl ow.
OUTPUT VOLTAGE
VO (V) (20mV/div)
OUTPUT VOLTAGE On/Off VOLTAGE
VO (V) (1V/div) VOn/off (V) (2V/div)
TIME, t (1s/div) TIME, t (5ms/div)
Figure 8. Typical output ripple and noise (VIN = VIN,NOM,
Io = Io,max). Figure 11. Typical Start-up Using Remote On/Off,
negative logic version shown (VIN = VIN,NOM, Io = Io,max).
Io (A) (5A/div) VO (V) (100mV/div)
OUTPUT VOLTAGE INPUT VOLTAGE
VO (V) (1V/div) VIN (V) (20V/div)
TIME, t (200 s /div) TIME, t (5ms/div)
Figure 9. Trans ien t Resp onse to Dyna mic Load
Change , 0.1A/µS, from 75% to 50% to 75% of full load. Figure 12. Typical Start-up Usin g Input V oltage (VIN =
VIN,NOM, Io = Io,max).
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 7
Test Configurations
TO OSCILLOSCOPE CURRENT PROBE
LTEST
12μH
BATTERY
CS 220μF
E.S.R.<0.1
@ 20°C 100kHz
33μF
Vin+
Vin-
NOTE: Measure input reflected ripple current with a simulated
source inductance (LTEST) of 12μH. Capacitor CS offsets
possible battery impedance. Measure current as shown
above.
Figure 13. Input Reflected Ripple Current Test
Setup.
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
V
O (+)
V O ( – )
RESISTIVE
LOAD
SCOPE
COPPER STRIP
GROUND PLANE
10uF
0.1uF
Figure 14. Output Ripple and Noise Test Setup.
Vout+
Vout-
Vin+
Vin-
RLOAD
Rcontact Rdistribution
Rcontact Rdistribution
Rcontact
Rcontact
Rdistribution
Rdistribution
VIN VO
NOTE: All voltage measurements to be taken at the module
terminals, as shown above. If sockets are used then
Kelvin connections are required at the module terminals
to avoid measurement errors due to socket contact
resistance.
Figure 15. Ou tput Voltage and Effici en cy Tes t
Setup.
=
VO. IO
VIN. IIN
x 100 %
Efficiency
Design Considerations
Input Filte ring
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 13, a
33μF electrolytic capacitor (ESR<0.7 at 100kHz),
mounted close to the power module helps ensure the
stability of the unit. Consult the factory for further
application guidelines.
Safety Considerations
For safety-agency approval of the system in which the
power module is used, the power module must be
installed in compliance with the spacing and
separation requirements of the end-use safety agency
standard, i.e UL60950-1, CSA C22.2 No.60950-1,
and VDE0805-1(IEC60950-1).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75Vdc), for the module’s output to be considered as
meeting the requirements for safety extra-low voltage
(SELV), all of the following must be true:
The input source is to be provided with reinforced
insulation from any other hazardous voltages,
including the ac mains.
One VIN pin and one VOUT pin are to be
grounded, or both the input and output pins are
to be kept floating.
The input pins of the module are not operator
accessible.
Another SELV reliability test is conducted on the
whole system (combination of supply source and
subject module), as required by the safety
agencies, to verify that under a single fault,
hazardous voltages do not appear at the
module’s output.
Note: Do not ground either of the input pins of the
module without grounding one of the output
pins. This may allow a non-SELV voltage to
appear between the output pins and ground.
The power module has extra-low voltage (ELV)
outputs when all inputs are ELV.
All flammable materials used in the manufacturing of
these modules are rated 94V-0, or tested to the
UL60950 A.2 for reduced thickness.
For input voltages exceeding –60 Vdc but less than or
equal to –75 Vdc, these converters have been
evaluated to the applicable requirements of BASIC
INSULATION between secondary DC MAINS
DISTRIBUTION input (classified as TNV-2 in Europe)
and unearthed SELV outputs.
The input to these units is to be provided with a
maximum 5 A time-delay fuse in the ungrounded lead.
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 8
Feature Description
Remote On/Off
Two remote on/off options are available. Positive logic
turns the module on during a logic high voltage on the
ON/OFF pin, and off during a logic low. Negative logic
remote On/Off, device code suffix “1”, turns the
module off during a logic high and on during a logic
low.
ON/OFF
Vin+
Vin-
Ion/off
Von/off
Vout+
TRIM
Vout-
Figure 16. Remote On/Off Implementation.
To turn the power module on and off, the user must
supply a switch (open collector or equivalent) to
control the voltage (Von/off) between the ON/OFF
terminal and the VIN(-) terminal (see Figure 16). Logic
low is 0V ≤ Von/off ≤ 1.2V. The maximum Ion/off during a
logic low is 1mA; the switch should be maintaining a
logic low level while sinking this current.
During a logic high, the typical maximum Von/off
generated by the module is 15V, and the maximum
allowable leakage current at Von/off = 5V is 1μA.
If not using the remote on/off feature:
For positive logic, leave the ON/OFF pin open.
For negative logic, short the ON/OFF pin to VIN(-).
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections (See Figure 17). The voltage between
the remote-sense pins and the output terminals must
not exceed the output voltage sense range given in
the Feature Specifications table:
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] 10% VO,set
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim.
The amount of power delivered by the module is
defined as the voltage at the output terminals
multiplied by the output current. When using remote
sense and trim, the output voltage of the module can
be increased, which at the same output current would
increase the power output of the module. Care should
be taken to ensure that the maximum output power of
the module remains at or below the maximum rated
power (Maximum rated power = Vo,set x Io,max).
VO(+)
SENSE(+)
SENSE(–)
VO(–)
VI(+)
VI(-)
IOLOAD
CONTACT AND
DISTRIBUTION LOSS
E
SUPPLY II
CONTACT
RESISTANCE
Figure 17. Circuit Configuration for remote
sense.
Input Undervoltage Lockout
At input voltages below the input undervoltage lockout
limit, the module operation is disabled. The module
will only begin to operate once the input voltage is
raised above the undervoltage lockout turn-on
threshold, VUV/ON.
Once operating, the module will continue to operate
until the input voltage is taken below the undervoltage
turn-off threshold, VUV/OFF.
Overtemperature Protection
To provide protection under certain fault conditions,
the unit is equipped with a thermal shutdown circuit.
The unit will shutdown if the thermal reference point
Tref (Figure 19), exceeds 128-133oC (typical)
depending on TA and airflow, but the thermal
shutdown is not intended as a guarantee that the unit
will survive temperatures beyond its rating. The
module will automatically restart upon cool-down to a
safe temperature.
Output Overvoltage Protection
The output over voltage protection scheme of the
modules has an independent over voltage loop to
prevent single point of failure. This protection feature
latches in the event of over voltage across the output.
Cycling the on/off pin or input voltage resets the
latching protection feature. If the auto-restart option
(4) is ordered, the module will automatically restart
upon an internally programmed time elapsing.
Overcurrent Protection
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current
limiting continuously. At the point of current-limit
inception, the unit enters hiccup mode. If the unit is
not configured with auto–restart, then it will latch off
following the over current condition. The module can
be restarted by cycling the dc input power for at least
one second, or by toggling the remote on/off signal for
at least one second. If the unit is configured with the
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 9
Feature Descriptions (continued)
auto-restart option (4), it will remain in the hiccup
mode as long as the overcurrent condition exists; it
operates normally, once the output current is brought
back into its specified range. The average output
current during hiccup is 10% IO, max.
Output Voltage Programming
Trimming allows the output voltage set point to be
increased or decreased. This is accomplished by
connecting an external resistor between the TRIM pin
and either the VO(+) pin or the VO(-) pin.
VO(+)
VOTRIM
VO(-)
Rtrim-down
LOAD
VIN(+)
ON/OFF
VIN(-)
Rtrim-up
Figur e 18. Circ uit Configuration to Tr im Ou tpu t
Voltage.
Connecting an external resistor (Rtrim-down) between
the TRIM pin and the Vo(-) (or Sense(-)) pin
decreases the output voltage set point. To maintain
set point accuracy, the trim resistor tolerance should
be ±1.0%.
The following equation determines the required
external resistor value to obtain a percentage output
voltage change of Δ%

22.10
%
511
downtrim
R
Where 100% ,
,
seto
desiredseto V
VV
For example, to trim-down the output voltage of 3.3V
module (KNW020A0F/F1) by 8% to 3.036V, Rtrim-down
is calculated as follows:
8%

22.10
8
511
downtrim
R

6.53
downtrim
R
Connecting an external resistor (Rtrim-up) between the
TRIM pin and the VO(+) (or Sense (+)) pin increases
the output voltage set point. The following equations
determine the required external resistor value to
obtain a percentage output voltage change of Δ%:

22.10
%
511
%225.1
%)100(11.5 ,seto
uptrim V
R
Where 100% ,
,
seto
setodesired
V
VV
For example, to trim-up the output voltage of 5.0V
module (KNW013A0A/A1) by 5% to 5.25V, Rtrim-up is
calculated is as follows:
5%

22.10
5
511
5225.1 )5100(0.511.5
uptrim
R

6.325
uptrim
R
The voltage between the Vo(+) and Vo(–) terminals
must not exceed the minimum output overvoltage
protection value shown in the Feature Specifications
table. This limit includes any increase in voltage due
to remote-sense compensation and output voltage
set-point adjustment trim.
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. The amount of power
delivered by the module is defined as the voltage at
the output terminals multiplied by the output current.
When using remote sense and trim, the output
voltage of the module can be increased, which at the
same output current would increase the power output
of the module. Care should be taken to ensure that
the maximum output power of the module remains at
or below the maximum rated power (Maximum rated
power = Vo,set x Io,max).
Thermal Considerations
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel.
The thermal reference points, Trefx, used in the
specifications are shown in Figure 19. For reliable
operation, the temperature of both Tref points should
not exceed 125oC.
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 10
Thermal Considerations (continued)
Figure 19. Trefx Temperature Measurement
Location.
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
EMC Considerations
The KNW series module shall also meet limits of
EN55022 Class A with a recommended single stage
filter, shown in Figure 20. Please contact your
Lineage Power Sales Representative for further
information.
Figure 20. Single stage fi lter used for test results.
Figure 21. KNW020A0F Quasi Peak Conducted
Emissions with EN 55022 Class A limits, Figure 20
filter (VIN = VIN,NOM, Io = 0.80 Io,max).
Layout Considerations
Avoid placing copper areas on the outer layer of the
application PCB directly underneath the power
module in the keep out areas shown in the
Recommended Pad Layout figures. Also avoid
placing via interconnects underneath the power
module in these keep out areas.
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 11
Surface Mount Information
Pick and Place
The KNW013-020 modules use an open frame
construction and are designed for a fully automated
assembly process. The pick and place locations on
the module are the larger magnetic core or the
transistor package as shown in Figure 22. The
modules are fitted with a label which meets all the
requirements for surface mount processing, as well as
safety standards, and is able to withstand reflow
temperatures of up to 300oC. The label also carries
product information such as product code, serial
number and the location of manufacture.
Figure 22. Pick and Place Locations.
Nozzle Recommendations
The module weight has been kept to a minimum by
using open frame construction. Even so, these
modules have a relatively large mass when compared
to conventional SMT components. Variables such as
nozzle size, tip style, vacuum pressure and placement
speed should be considered to optimize this process.
The recommended nozzle diameter for reliable
operation is 5mm. Oblong or oval nozzles up to 11 x 5
mm may also be used within the space available.
Tin Lead Soldering
The KNW013-020 power modules (both non-Z and –Z
codes) can be soldered either in a conventional
Tin/Lead (Sn/Pb) process. The non-Z version of the
KNW013-020 modules are RoHS compliant with the
lead exception. Lead based solder paste is used in
the soldering process during the manufacturing of
these modules. These modules can only be soldered
in conventional Tin/lead (Sn/Pb) process. It is
recommended that the customer review data sheets
in order to customize the solder reflow profile for each
application board assembly. The following
instructions must be observed when soldering these
units. Failure to observe these instructions may result
in the failure of or cause damage to the modules, and
can adversely affect long-term reliability.
In a conventional Tin/Lead (Sn/Pb) solder process
peak reflow temperatures are limited to less than
235oC. Typically, the eutectic solder melts at 183oC,
wets the land, and subsequently wicks the device
connection. Sufficient time must be allowed to fuse
the plating on the connection to ensure a reliable
solder joint. There are several types of SMT reflow
technologies currently used in the industry. These
surface mount power modules can be reliably
soldered using natural forced convection, IR (radiant
infrared), or a combination of convection/IR. For
reliable soldering the solder reflow profile should be
established by accurately measuring the modules CP
connector temperatures.
REFLOW TEMP (C)
0
50
10 0
15 0
200
250
300
Preheat zo ne
max 4
o
Cs
-1
So ak zo ne
30-240s
Heat zone
max 4
o
Cs
-1
Peak Temp 235
o
C
Cooling
zo ne
1- 4
o
Cs
-1
T
lim
above
205
o
C
REFLOW TIME (S)
Figure 23. Reflow Profile for Tin/Lead (Sn/Pb)
process
MAX TEMP SOLDER (C)
200
205
210
215
220
225
230
235
240
0 102030405060
Figure 24. Time Limit Curve Above 205oC for
Tin/Lead (Sn/Pb) process
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 12
Surface Mount Information (continued)
Lead Free Soldering
The –Z version of the KNW013-020 modules are
lead-free (Pb-free) and RoHS compliant, and are both
forward and backward compatible in a Pb-free and a
SnPb soldering process. The non-Z version of the
KNW006/010 modules are RoHS compliant with the
lead exception. Lead based solder paste is used in
the soldering process during the manufacturing of
these modules. These modules can only be soldered
in conventional Tin/lead (Sn/Pb) process. Failure to
observe the instructions below may result in the
failure of or cause damage to the modules and can
adversely affect long-term reliability.
Pb-free Reflow Profile
Power Systems will comply with J-STD-020 Rev. C
(Moisture/Reflow Sensitivity Classification for
Nonhermetic Solid State Surface Mount Devices) for
both Pb-free solder profiles and MSL classification
procedures. This standard provides a recommended
forced-air-convection reflow profile based on the
volume and thickness of the package (table 4-2). The
suggested Pb-free solder paste is Sn/Ag/Cu (SAC).
The recommended linear reflow profile using
Sn/Ag/Cu solder is shown in Figure 25.
MSL Rating
The KNW013-020 modules have a MSL rating of 3.
Storage and Handling
The recommended storage environment and handling
procedures for moisture-sensitive surface mount
packages is detailed in J-STD-033 Rev. A (Handling,
Packing, Shipping and Use of Moisture/Reflow
Sensitive Surface Mount Devices). Moisture barrier
bags (MBB) with desiccant are required for MSL
ratings of 2 or greater. These sealed packages
should not be broken until time of use. Once the
original package is broken, the floor life of the product
at conditions of 30°C and 60% relative humidity
varies according to the MSL rating (see J-STD-033A).
The shelf life for dry packed SMT packages will be a
minimum of 12 months from the bag seal date, when
stored at the following conditions: < 40° C, < 90%
relative humidity.
Post Solder Cleaning and Drying
Considerations
Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The
result of inadequate cleaning and drying can affect
both the reliability of a power module and the
testability of the finished circuit-board assembly. For
guidance on appropriate soldering, cleaning and
drying procedures, refer to Lineage Power Board
Mounted Power Modules: Soldering a nd Cleaning
Application Note (AN04-001).
Pe r J-STD-020 Re v. C
0
50
100
150
200
250
300
Reflow Time (Seconds)
Reflow Temp (°C)
Heating Zone
1°C/Second
Pe ak Temp 260°C
* Min. Time Above 235°C
15 Seco nds
*Time Above 217°C
60 Sec o nds
Cooling
Zone
Figure 25. Recommended linear reflow profile
using Sn/Ag/Cu solder .
Through-Hole Lead-Free Soldering
Information
The RoHS-compliant through-hole products use the
SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant
components. They are designed to be processed
through single or dual wave soldering machines. The
pins have an RoHS-compliant finish that is compatible
with both Pb and Pb-free wave soldering processes.
A maximum preheat rate of 3C/s is suggested. The
wave preheat process should be such that the
temperature of the power module board is kept below
210C. For Pb solder, the recommended pot
temperature is 260C, and, for Pb-free solder, the
recommended pot temperature is 270C max. Not all
RoHS-compliant through-hole products can be
processed with paste-through-hole Pb or Pb-free
reflow process. If additional information is needed,
please consult with your Lineage Power
representative for more details.
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 13
Mechanical Outline for Surface Mount Module
Dimensions are in millimeters and [inches].
Tolerances: x.x mm 0.5 mm [x.xx in. 0.02 in.] (unless otherwise indicated)
x.xx mm 0.25 mm [x.xxx in 0.010 in.]
Top View
Side View
Bottom View
PIN FUNCTION
1 VIN(+)
2 On/Off
3 VIN(-)
4 Vo(-)
5 Sense(-)
6 Trim
7 Sense(+)
8 Vo(+)
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 14
Mechanical Outline for Through-Hole Module
Dimensions are in millimeters and [inches].
Tolerances: x.x mm 0.5 mm [x.xx in. 0.02 in.] (unless otherwise indicated)
x.xx mm 0.25 mm [x.xxx in 0.010 in.]
Top View
Side View
Bottom View
PIN FUNCTION
1 VIN(+)
2 On/Off
3 VIN(-)
4 Vo(-)
5 Sense(-)
6 Trim
7 Sense(+)
8 Vo(+)
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 15
Recommended Pad Layout
Dimensions are in and millimeters [inches].
Tolerances: x.x mm 0.5 mm [x.xx in. 0.02 in.] (unless otherwise indicated)
x.xx mm 0.25 mm [x.xxx in 0.010 in.]
SMT Recommended Pad Layout (Component Side View)
TH Recommended Pad Layout (Component Side View)
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
LINEAGE POWER 16
Packaging Details
The Sixteenth-brick SMT versions are supplied in tape & reel as standard. Details of tape dimensions are shown
below. Modules are shipped in quantities of 140 modules per reel.
Tape Dimensions
Dimensions are in millimeters.
Data Sheet
August 22, 2011 KNW013-020 Series Power Modules; DC-DC Converters
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 13 to 20A Output Current
Document No: DS08-009 ver. 1.05
PDF name: knw013-020_ds.pdf
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 1. Device Code
Product Codes Input Voltage Output
Voltage Output
Current On/Off Logic Connector
Type Comcode
KNW013A0A4-SRZ 48V (36-75Vdc) 5.0V 13A Negative Surface mount CC109167128
KNW013A0A41-SRZ 48V (36-75Vdc) 5.0V 13A Negative Surface mount CC109141438
KNW013A0A41Z 48V (36-75Vdc) 5.0V 13A Negative Through hole CC109141446
KNW013A0A641Z 48V (36-75Vdc) 5.0V 13A Negative Through hole CC109156948
KNW013A0A841Z 48V (36-75Vdc) 5.0V 13A Negative Through hole CC109160207
KNW020A0F1-SRZ 48V (36-75Vdc) 3.3V 20A Negative Surface mount CC109172292
KNW020A0F41-SRZ 48V (36-75Vdc) 3.3V 20A Negative Surface mount CC109139267
KNW020A0F41Z 48V (36-75Vdc) 3.3V 20A Negative Through hole CC109139275
KNW020A0F641Z 48V (36-75Vdc) 3.3V 20A Negative Through hole CC109155727
KNW020A0F841Z 48V (36-75Vdc) 3.3V 20A Negative Through hole CC109167350
Table 2. Device Coding Scheme and Options
Characteristic Definition
Form Factor K K = Sixteenth Brick
Family Designator N
Input Voltage W W = Wide Range, 36V-75V
013A0 013A0 = 013.0 Amps Maximum Output Current
020A0 020A0 = 020.0 Amps Maximum Output Current
A A = 5.0V nominal
F F = 3.3V nominal
Omit = Default Pin Length shown in Mechanical Outline Figures
6 6 = Pin Length: 3.68 mm ± 0.25mm , (0.145 in. ± 0.010 in.)
8 8 = Pin Length: 2.79 mm ± 0.25mm , (0.110 in. ± 0.010 in.)
Omit = Latching Mode
4 4 = Auto-restart following shutdown (Overcurrent/Overvoltage)
Omit = Positive Logic
1 1 = Negative Logic
Omit = Standard open Frame Module
SR SR = Surface mount connections & tape/reel package
Customer Specific XY XY = Customer Specific Modified Code, Omit for Standard Code
Omit = RoHS 5/6, Lead Based Solder Used
Z Z = RoHS 6/6 Compliant, Lead free
RoHS
Ratings
Mechanical Features
Options
Charact er and Posi t i on
Pin Length
Action following
Protective Shutdown
On/Off Logic
Output Current
Output Voltage
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601 Shiloh Road, Plano, TX 75074, USA
+1-888-LINEAGE(546-3243)
(Outside U.S.A.: +1-972-244-WATT(9288))
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
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a
pplication. No rights under any patent accompany the sale of any such product(s) or information.
Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.
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