Data Sheet
April 2008
JAW050A and JAW075A Power Modules; dc-dc Converters:
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
The JAW Series Power Modules use surface-mount technol-
ogy and deliver efficient and compact dc-dc conversion.
Applications
nDistributed power architectures
nEstablishi ng 5 V local power bus to feed
point-of-load co nverters in 48 V bus systems
Options
nHeat sinks available for extended operation
nChoice of remote on/off logic configuration
nChoice of short lead lengths
Description
The JAW050A and JAW075A Power Modules are dc-dc converters that operate over an input voltage range of
36 Vdc to 75 Vdc and provide a regulated dc output. The outputs are fully isolated from the inputs, allowing
versatile polarity configur ations and grounding connections. The modules have maximum power ratings from
50 W to 75 W at a typical full-load efficiency of 84%.
The sealed modules offer a metal baseplate for improved thermal performance. Thr eaded-through holes are
provided to allow easy mounting or addition of a heat sink for high-temperature applications. The standard
feature set includes remote sensing, output trim, and remote on/off for convenient flexibility in distributed power
applications.
*ISO is a registered trademark of the International Organization for Standardization.
†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.
** IEC is a trademark of International Elektrotechniker Commission.
††This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should
be followed. (The CE mark is placed on selected products.)
Features
nSmall size: 61.0 mm x 57.9 mm x 12.7 mm
(2.40 in. x 2.28 in. x 0.50 in.)
nHigh power densi ty
nHigh efficiency: 84% typical
nLow output noise
nConstant frequency
nIndustry-standar d pin o ut
nMetal case
n2:1 input voltage range
nOvertemperature, overvo ltage, and overcurrent
protection
nRemote on/off and remote sense
nAdjustable outpu t voltage
nCase ground pin
nManufacturing facilities registered against the
ISO*9000 series standards
nUL† 60950 Recognized, CSA‡ C22.2 No. 60950-00
Certified, and VDE § 0805 (IEC** 60950, 4th Edi-
tion) Licensed
nCE mark meets 73/23 /EEC and 93/68/EEC
directives††
2Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause pe rma nen t damag e to th e device . The se are abso-
lute 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 device reliability.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions.
Table 1. Input Specifications
Fusing Considerations
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone
operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus-
ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The
safety agencies require a normal-blow fuse with a maximum rating of 6 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 for furth er information.
Parameter Symbol Min Max Unit
Input Voltage:
Continuous
Transient (100 ms) VI
VI, trans —
—80
100 Vdc
V
Operating Case Temperature
(See Thermal Considerations section.) TC–40 100 °C
Storage Temperature Tstg –55 125 °C
I/O Isolation Voltage — — 1500 Vdc
Parameter Symbol Min Typ Max Unit
Operating Input Voltage VI36 48 75 Vdc
Maximum Input Current:
VI = 0 V to 75 V; IO = IO, max:
JAW050A (See Figure 1.)
JAW075A (See Figure 2.)
VI = 36 V to 75 V; IO = IO, max:
JAW050A
JAW075A
II, max
II, max
II, max
II, max
—
—
—
—
—
—
—
—
3.0
3.5
1.7
2.6
A
A
A
A
Inrush Transient i2t——1.0A
2s
Input Reflected-ripple Current, Peak-to-peak
(5 Hz to 20 MHz, 12 µH source impedance;
see Figure 11.)
II—5—mAp-p
Input Ripple Rejection (120 Hz) — — 60 — dB
Lineage Power 3
Data Sheet
April 2008 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Electrical Specifications (continued)
Table 2. Output Specifications
* Consult your sales representative or the factory.
† These are manufacturing test limits. In some situations, results may differ.
Table 3. Isolation Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI = 48 V; IO = IO, max; TC = 25 °C) All VO, set 4.92 5.0 5.08 Vdc
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until en d of life.
See Figure 13.)
All VO4.85 — 5.15 Vdc
Output Regulation:
Line (VI = 36 V to 75 V)
Load (IO = IO, min to IO, max)
Temperature (TC = –40 °C to +100 °C)
All
All
All
—
—
—
—
—
—
0.01
0.05
15
0.1
0.2
50
%VO
%VO
mV
Output Ripple and Noise Voltage
(See Figure 12.):
RMS
Peak-to-peak (5 Hz to 20 MHz) All
All —
——
——
—40
150 mVrms
mVp-p
External Load Capacitance All — 0 — * µF
Output Current
(At IO < IO, min, the modu les may exceed output
ripple specifications.)
JAW050A
JAW075A IO
IO0.5
0.5 —
—10
15 A
A
Output Current-limit Inception
(VO = 90% of VO, nom)JAW050A
JAW075A IO, cli
IO, cli —
—12.0
18.0 14†
21†A
A
Output Short-circuit Current (VO = 250 mV ) All — — 170 — %IO, max
Efficiency (VI = 48 V; IO = IO, max; TC = 70 °C;
see Figure 13.) JAW050A
JAW075A η
η—
—84
84 —
—%
%
Switching Frequency All — — 320 — kHz
Dynamic Response
(ΔIO/Δt = 1 A/10 µs, VI = 48 V, TC = 25 °C;
tested without any load capacitance.):
Load Change from I O = 50% to 75% of IO, max:
Peak Deviation
Settling Time (VO < 10% of peak deviation)
Load Change from I O = 50% to 25% of IO, max:
Peak Deviation
Settling Time (VO < 10% of peak deviation)
All
All
All
All
—
—
—
—
—
—
—
—
5
300
5
300
—
—
—
—
%VO,
set
µs
%VO,
set
µs
Parameter Min Typ Max Unit
Isolation Capacitance — 2500 — pF
Isolation Resista nce 10 — — MΩ
4Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
General Specifications
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See the Feature Descriptions section for additional information.
* These are manufacturing test limits. In some situations, results may differ.
Solder, Cleaning, and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to the electrical board testing. The
result of inadequate circuit-board cleaning and drying can affect both the reliability of a power module and the test-
ability of the finished circuit-board assembly. For guidance on appropriate soldering, cleaning, and drying proce-
dures, refer to the Board-Mounted Power Modules: Soldering and Cleaning Application Note (AP97-021EPS).
Parameter Min Typ Max Unit
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) 3,000,000 hours
Weight — — 100 (3.5) g (oz.)
Parameter Symbol Min Typ Max Unit
Remote On/Off Signal Interface
(VI = 0 V to 75 V; open collector or equivalent compatible;
signal referenced to VI(–) terminal):
JAWxxxA1 Preferred Logic:
Logic Low—Module On
Logic High—Module Off
JAWxxxA Optional Logic:
Logic Low—Module Of f
Logic High—Module On
Logic Low:
At Ion/off = 1.0 mA
At Von/off = 0.0 V
Logic High:
At Ion/off = 0.0 µA
Leakage Current
Turn-on Time (See Figure 10.)
(IO = 80% of IO, max; VO within ±1% of steady state)
Von/off
Ion/off
Von/off
Ion/off
—
0
—
—
—
—
—
—
—
—
40
1.2
1.0
15
50
80
V
mA
V
µA
ms
Output Voltage Adjustment:
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustme nt Range (trim) —
——
60 —
—0.5
110 V
%VO, nom
Output Overvoltage Protection VO, sd 5.9* — 7.0* V
Overtemperature Protection TC—105— °C
Data Sheet
April 2008
Lineage Power 5
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Characteristic Curves
The following figures provide typical characteristics fo r the powe r modules. The figures are identical for bo th on/off
configurations.
8-3327(F)
Figure 1. Typical JAW050A Input Characteristics at
Room Temperature
8-3328(F)
Figure 2. Typical JAW075A Input Characteristics at
Room Temperature
8-3329(F)
Figure 3. Typical JAW050A Efficiency vs. Output
Current at Room Temperature
8-3330(F)
Figure 4. Typical JAW075A Efficiency vs. Output
Current at Room Temperature
1.4
1.2
0INPUT VOLTAGE, VI (V)
INPUT CURRENT, II (A)
10 20 30 40 50 60 70 75
1.0
0.8
0.6
0.4
0.2
0.0 5 152535455565
1.6
1.8
IO = 10 A
IO = 5 A
IO = 0.5 A
3.0
2.5
0INPUT VOLTAGE, VI (V)
INPUT CURRENT, II (A)
10 20 30 40 50 60 70 75
2.0
1.5
1.0
0.5
0.0 5 152535455565
IO = 15 A
IO = 7.5 A
IO = 1.5 A
82
81
3OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
579
80
79
78
77
76
75
46810
83
84
74
VI = 75 V
VI = 55 V
VI = 36 V
83
82
3OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
579
81
80
79
78
77
76
46810
84
85
75 11 12 13 14 15
VI = 75 V
VI = 55 V
VI = 36 V
6Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Characteristic Curves (continued)
8-3331(F)
Note: See Figure 12 for test conditions.
Figure 5. Typical JAW075A Output Ripple Voltage
at Room Temperature and 48 Vdc Input
1-0097
Note: Tested without any load capacitance.
Figure 6. Typical JAW050A Transient Response to
Step Increase in Load from 50% to 75% of
Full Load at Room Temperature and
48 Vdc Input (Waveform Averaged to
Eliminate Ripple Component.)
8-3332(F)
Note: Tested without any load capacitance.
Figure 7. Typical JAW075A Transient Response to
Step Increase in Load from 50% to 75% of
Full Load at Room Temperature and
48 Vdc Input (Waveform Averaged to
Eliminate Ripple Component.)
1-0098
Note: Tested without any load capacitance.
Figure 8. Typical JAW050A Transient Response to
Step Decrease in Load from 50% to 25%
of Full Load at Room Temperature and
48 Vdc Input (Waveform Averaged to
Eliminate Ripple Component.)
OUTPUT VOLTAGE, VO (V)
(50 mV/div)
TIME, t (5 μs/div)
IO = 1.0 A
IO = 7.5 A
IO = 15 A
TIME, t (50 μs/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
OUTPUT V OLTAGE, VO (V)
(200 mV/div)
5 A
OUTPUT VOLTAGE, VO (V)
(100 mV/div)
TIME, t (200 μs/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
7.5 A
TIME, t (50 μs/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
OUTPUT V OLTAGE, VO (V)
(200 mV/div)
2.5 A
Data Sheet
April 2008
Lineage Power 7
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Characteristic Curves (continued)
8-3333(F)
Note: Tested without any load capacitance.
Figure 9. Typical JAW075A Transient Response to
Step Decrease in Load from 50% to 25%
of Full Load at Room Temperature and
48 Vdc Input (Waveform Averaged to
Eliminate Ripple Component.)
1-0099
Note: Tested without any load capacitance.
Figure 10. JAW075A1 Typical Start-Up from
Remote On/Off; IO = IO, max
Test Configurations
8-203(F).l
Note: Measure input reflected-ripple current with a simulated source
inductance (LTEST) of 12 µH. Capacitor CS offsets possible bat-
tery impedance. Measure current as shown above.
Figure 11. Input Reflected-Ripple Test Setup
8-513(F).d
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-
talum capacitor. Scope measurement should be made using a
BNC socket. Position the load between 51 mm and 76 mm
(2 in. and 3 in.) from the module.
Figure 12. Peak-to-Peak Output Noise
Measurement Test Setup
8-749(F)
Note: All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contact resistance.
Figure 13. Output Voltage and Efficiency
Measurement Test Setup
OUTPUT VOLTAGE, VO (V)
(100 mV/div)
TIME, t (200 ms/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
3.7 A
TIME, t (5 ms/div)
OUTPUT V OLTAGE, V o (V)
(2 V/div)
REMOTE ON/OFF,
VON/OFF (V)
TO OSCILLOSCOPE
CURRENT
PROBE
BATTERY
LTEST
12 μH
CS 220 μF
ESR < 0.1 Ω
@ 20 °C, 100 kHz 33 μF
ESR < 0.7 Ω
@ 100 kHz
VI(+)
VI(–)
1.0
μ
FRESISTIVE
SCOPE
COPPER STRIP
10
μ
FLOAD
V
O
(+)
V
O
(–)
VI(+)
IIIO
SUPPLY
CONTACT
CONTACT AND
LOAD
SENSE(+)
VI(–)
VO(+)
VO(–)
SENSE(–)
RESISTANCE
DISTRIBUTION LOSSES
ηVO(+) – VO(–)[]IO
VI(+) – VI(–)[]II
------------------------------------------------
⎝⎠
⎛⎞
x100=%
88 Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the power mod-
ule. For the test configuration in Figure 11, a 33 µF
electrolytic capacitor (ESR < 0.7 Ω at 100 kHz)
mounted clos e to the power module helps ensure sta-
bility of the unit. For other highly inductive source
impedances, 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
insta lled in compliance with the spacing and sep aration
requirements of the end-use safety agency standard,
i.e., UL 60950, CSA C22.2 No. 60950-00, and
VDE 0805 (IEC 60950, 4th Edition).
If the input source is non-SELV (ELV or a hazardous
voltage greater than 60 Vdc and less than or equal to
75 Vdc), for the module's output to be considered
meeting the requirements of safety extra-low volt age
(SELV), all of the following must be true:
nThe input source is to be provided with reinforced
insulation from any other hazard ou s voltages, includ-
ing the ac mains.
nOne VI pin and one VO pin are to be grounded, or
both the input and output pins are to be kept floating.
nThe input pins of the module are not operator acces-
sible.
nAnother SELV reliability test is conducted on the
whole system, as required by the safety agencies, on
the combination of supply source and the subject
module 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 ha s extra-low voltag e (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a maxi-
mum 6 A normal-blow fuse in the ungr ounded lead.
Feature Descriptions
Overcurrent Protection
To provide protection in an output overload condition,
the unit is equipped with an internal shutdown and
auto-rest art mechanism. At the inst ance of curren t-limit
inception, the module enters a hiccup mode of opera-
tion whereby it shuts down and automatically attempts
to restart. As long as the fault persists, the module
remains in this mode.
The protection mechanism is such that the unit can
continue in this condition until the fault is cleared.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off 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 turns the module off dur-
ing a logic high and on during a logic low. Negative
logic, device code suffix “1,” is the factory-preferred
configuration.
To turn the power module on and off, the user must
supply a switch to control the voltage between the
on/off terminal and the VI(–) terminal (Von/off). The
switch can be an open collector or equivalent (see
Figure 14). A logic low is Von/off = 0 V to 1.2 V. The
maximum Ion/off during a logic low is 1 mA. The switch
should maintain a logic-low voltage while sinking 1 mA.
During a logic high, the maximum Von/off generated by
the power module is 15 V. The maximum allowable
leakage current of the switch at Von/off = 15 V is 50 µA.
If not using the remote on/off feature, do one of the
following:
nFor negative logic, short the ON/OFF pin to VI(–).
nFor positive logic, leave the ON/OFF pin open.
Lineage Power 9
Data Sheet
April 2008 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Feature Descriptions (continued)
Remote On/Off (continued)
8-720(F).c
Figure 14. Remote On/Off Implementation
Remote Sense
Remote sense minimizes the effects of distri bution
losses by regulating the voltage at the remote-sense
connections. The voltage between the remote-sense
pins and the output terminals must not exceed the out-
put voltage se nse range give n in the Fe atur e Specifica-
tions table, i.e.:
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum output overvoltage pro-
tection voltage as indicated in the Feature Specifica-
tions table. This limit includes any increase in voltage
due to remote-sense compensation and output volt age
set-point adjustment (trim). See Figure 15.
If not using the remote-sense feature to regulate the
output at the point of load, then connect SENSE(+) to
VO(+) and SENSE(–) to VO(–) at the module .
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. Consult the factory if you
need to increase the output voltage more than the
above limitation.
The amount of power delivered by the module is
defined as the volta ge 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 ma xim u m ou tp ut pow er of
the module remains at or below the maximum rated
power.
8-651(F).m
Figure 15. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage Set-Point Adjustment (Trim)
Output voltage trim allows the user to increase or
decrease th e output voltage set point of a module . This
is accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(–) pins. The trim resistor should be positio ned
close to the module.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and
SENSE(–) pins (Radj-down), the ou tp ut voltage set point
(VO, adj) decreases (see Figure 16). The following equa-
tion determines the required external-resistor value to
obtain a percentage ou tput voltage change of Δ%.
With an external resistor connected be tween th e TRIM
and SENSE(+) pins (Radj-up), the output voltage set
point (VO, adj) increases (see Figure 17).
The following equation determines the required exter-
nal-resistor value to obt ain a percenta ge output voltage
change of Δ%.
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum output overvoltage pro -
tection voltage as indicated in the Feature Specifica-
tions table. This limit includes any increase in voltage
due to remote-sense compen sation and output vo lt age
set-point adjustment (trim). See Figure 15.
SENSE(+)
V
O
(+)
SENSE(–)
V
O
(–)
V
I
(–)
+
–
I
on/off
ON/OFF
V
I
(+)
LOAD
V
on/off
SENSE(+)
SENSE(–)
VI(+)
VI(–)
IOLOAD
CONTACT AND
SUPPLY II
CONTACT
VO(+)
VO(–)
DISTRIBUTION LOSSESRESISTANCE
Radj-down 1000
Δ%
-------------11–
⎝⎠
⎛⎞
kΩ=
Radj-up VO nom,()1Δ%
100
----------+()1.225–
1.225Δ%
------------------------------------------------------------------------ 1000 11–
⎝⎠
⎜⎟
⎜⎟
⎛⎞
kΩ=
1010 Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Feature Descriptions (continued)
Output Volt age Set-Point Adjustment (T rim)
(continued)
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for th e output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. Consult the factory if you
need to increase the output voltage more than the
above limitation.
The amount of powe r delivered by the module is
defined as the volta ge 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 outpu t of the mo dule. Care should
be taken to ensure that the maximum output pow er of
the module remains at or below the maximum rated
power.
8-748(F).b
Figure 16. Circuit Configuration to Decrease
Output Voltage
8-715(F).b
Figure 17. Circuit Configuration to Increase
Output Voltage
Output Overvoltage Protection
To provide protection in an output overvoltage condi-
tion, the unit is equipped with circuitry that monitors the
voltage on the output terminals. If the voltage on th e
output term ina ls exc ee d th e ove r voltage pr ot ec tion
threshold, the module enters a hiccup mode of opera-
tion whereby it shuts down and automatically attempts
to restart. As long as the fault persists, the module
remains in this mode.
The protection mechanism is such that the unit can
continue in this condition until the fault is cleared.
Overtemperature Protection
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. Th e cir-
cuit shuts down when the maximum case temperature
is exceeded. The module will automatically restart
when the case temperature cools sufficiently.
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation of the unit.
Heat-dissipating com po n en ts inside the un it ar e th er -
mally coupled to the case. Heat is removed by co nduc-
tion, convection, and radiation to the surrounding
environment. Proper cooling can be verified by mea-
suring the case temperature. Peak temperature (TC)
occurs at the position indicated in Figure 18.
8-716(F).h
Note: Top view, pin locations are for reference only. Measurements
are shown in millimeters and (inches).
Figure 18. Case Temperature Measurement
Location
VI
(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–) Radj-down RLOAD
VI
(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–)
Radj-up RLOAD
MEASURE CASE
ON/OFF
CASE
+ SEN
TRIM
– SEN
29.0
(1.14)
30.5
TEMPERATURE HERE
V
O
(+)
V
O
(–)
V
I
(+)
V
I
(–)
(1.20)
Lineage Power 11
Data Sheet
April 2008 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Thermal Considerations (continued)
Introduction (continued)
The temperature at this location should not exceed
100 °C. The output power of the module should not
exceed the rated power for the module as listed in the
Ordering Information table.
Although the maximum case temperature of the power
modules is 100 °C, you can lim it this temperature to a
lower value for extremely high reliability.
Heat Transfer Without Heat Sinks
Increasing airflow over the module e nhances the heat
transfer via convection. Figures 21 and 22 show the
maximum power that can be dissipated by the module
without exceeding the maximum case temperature ver-
sus local ambient temperature (TA) for natura l convec-
tion through 4 m/s (800 ft./min.). Note that the thermal
performance is orientation dependent. Longitudinal ori-
entation occurs when the long direction of the module
is parallel to the airflow , whereas transverse orientation
occurs when the short direction of the module is paral-
lel to the airflow.
Note that the natural convection condition was mea-
sured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.);
however, systems in which thes e po we r mod ule s ma y
be used typically generate natural convection airflow
rates of 0.3 m/s (60 ft./min.) due to other heat-dissipat-
ing components in the system. The use of Figure 22 is
shown in the following example.
Example
What is the minimum airflow necessa ry for a JA W075A
operating at VI = 55 V, an output current of 15 A, trans-
verse orientation, and a maximum ambient tempera-
ture of 55 °C?
Solution
Given: VI = 55 V
IO = 15 A
TA = 55 °C
Determine PD (Use Figure 20.):
PD = 14 W
Determine airflow (v) (Use Figure 22.):
v = 2.3 m/s (460 ft./min.)
8-3336(F)
Figure 19. JAW050A Power Dissipation vs.
Output Current at 25 °C
8-3337(F)
Figure 20. JAW075A Power Dissipation vs.
Output Current at 25 °C
0OUTPUT CURRENT, IO (A)
POWER DISSIPATION, PD (W)
246810
12
11
10
9
8
7
13579
5
4
3
6
VI = 75 V
VI = 55 V
VI = 36 V
OUTPUT CURRENT, IO (A)
POWER DISSIPATION, PD (W)
246810
12
11
10
9
8
7
13579
5
4
6
13
14
15
16
11 12 13 14 15
VI = 75 V
VI = 55 V
VI = 36 V
1212 Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Thermal Considerations (continued)
Heat Transfer Without Heat Sinks (continued)
8-2465(F)
Figure 21. Forced Convection Power Derating with
No Heat Sink; Longitudinal Orientation
8-2466(F)
Figure 22. Forced Convection Power Derating with
No Heat Sink; Transverse Orientation
Heat Transfer with Heat Sinks
The power modules have through-threaded, M3 x 0.5
mounting holes, which en able heat sinks or cold plates
to attach to the module. The mounting torque must not
exceed 0.56 N-m (5 in.-lb.).
Thermal derating with heat sinks is expressed by using
the overall thermal resistance of the module. Total
module thermal resistance (θca) is defined as the max-
imum case temperature rise (ΔTC, max) divided by the
module power dissipation (PD):
The location to measure case temperature (TC) is
shown in Figure 18. Case-to-ambient thermal resis-
tance vs. airflow for various heat sink configurations
and height s is shown in Figures 23 and 24. These
curves were obtained by experimental testing of heat
sinks, which are offered in the product catalog.
8-2164(F).a
Figure 23. Case-to-Ambie nt Thermal Resistance
Curves; Longitudinal Orientation
8-2165(F).a
Figure 24. Case-to-Ambie nt Thermal Resistance
Curves; Transverse Orientation
20
18
14
12
10
8
6
4
0010 405060708090100
POWER DISSIPATION, PD (W)
LOCAL AMBIENT TEMPERATURE, TA (°C)
16
20
2
30
0.1 m/s
(20 ft./min.)
1.0 m/s
(200 ft./min.)
2.0 m/s
(400 ft./min.)
4.0 m/s
(800 ft./min.)
3.0 m/s
(600 ft./min.)
20
18
14
12
10
8
6
4
0010 405060708090100
POWER DISSIPATION, PD (W)
LOCAL AMBIENT TEMPERATURE, TA (°C)
16
20
2
30
0.1 m/s
(20 ft.min.)
1.0 m/s
(200 ft./min.)
2.0 m/s
(400 ft./min.)
4.0 m/s
(800 ft./min.)
3.0 m/s
(600 ft./min.)
θca ΔTCmax,
PD
---------------------TCTA–()
PD
------------------------
==
9
8
6
5
4
3
2
1
00 1.0 2.0 3.0
CASE-TO-AMBIENT THERMAL
AIR VELOCITY, m/s (ft./min.)
(200) (400) (600)
RESISTANCE, θCA (°C/W)
7
1.5 2.5
(300) (500)
0.5
(100)
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
8
6
5
4
3
2
1
001.02.03.0
CASE-TO-AMBIENT THERMAL
AIR VELOCITY, m/s (ft./min.)
(200) (400) (600)
RESISTANCE, θCA (°C/W)
7
1.5 2.5
(300) (500)
0.5
(100)
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
Lineage Power 13
Data Sheet
April 2008 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Thermal Considerations (continued)
Heat Transfer with Heat Sinks (continued)
These measured resistances are from heat transfer
from the sides and bottom of the modu le as well as the
top side with the atta ched heat sink; therefore, the
case-to-ambient thermal resistances shown are gener-
ally lower than the resistance of the hea t si nk by itself.
The module used to collect the data in Figures 23 and
24 had a thermal-con ductive dry pad between the case
and the heat sink to minimize contact resistance. The
use of Figure 23 is shown in the following example.
Example
If an 82 °C case temperature is desired, what is the
minimum airflow nece ssary? Assume the JAW075A
module is operating at VI = 55 V, an output current of
15 A, longitudinal orientation, maximum ambient air
temperature of 40 °C, and the heat sink is 1/4 inch.
Solution
Given: VI = 55 V
IO = 15 A
TA = 40 °C
TC = 82 °C
Heat sink = 1/4 inch.
Determine PD by using Figure 20:
PD = 14 W
Then solve the following equation:
Use Figure 23 to determine air velocity for the 1/4 inch
heat sink.
The minimum airflow necessary for this module is
1.1 m/s (220 ft./ min.).
Custom Heat Sinks
A more det ailed model can be used to determine the
required thermal resistance of a heat sink to provide
necessary cooling. The to tal module resistance can be
separated into a resist ance from case-to-sink (θcs) and
sink-to-ambient (θsa) as shown in Figure 25.
8-1304(F).e
Figure 25. Resistance from Case-to-Sink and
Sink-to-Ambient
For a managed interface using thermal grease or foils,
a value of θcs = 0.1 °C/W to 0.3 °C/W is typical. The
solution for heat sink resistance is:
This equation assumes that all dissipated power must
be shed by the heat sink. Depending on the user-
defined application environment, a more accurate
model, including heat transfer from the sides and bot-
tom of the module, can be used. This equation pro-
vides a conservative estimate for such instances.
EMC Considerations
For assistance with designing for EMC compliance,
refer to the FLTR100V10 Filter Module Data Sheet
(DS99-294EPS).
Layout Considerations
Copper paths must not be routed beneath the power
module standoffs. For additional layout guidelines,
refer to the FLTR100V10 Filter Module Data Sheet
(DS99-294EPS).
θca TCTA–()
PD
------------------------
=
θca 82 40–()
14
------------------------
=
θca 3.0 °C/W=
PDTCTSTA
θcs θsa
θsa TCTA–()
PD
-------------------------θcs–=
14 Lineage Power
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Outline Diagram
Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.)
x.xx mm ± 0.25 mm (x.xxx in. ± 0.010 in.)
Top View
Side View
Bottom View
8-716(F).j
* Side label includes Lineage name, product designation, safety agency markings, input/output voltage and current ratings, and bar code.
† The case pin length is 5.3 (0.21), i.e., 1.2 (0.05) longer than the other pins.
57.9 (2.28)
61.0
(2.40)
0.51 (0.020)
12.7 (0.50) 2.06 (0.081) DIA SOLDER-
PLATED BRASS, 2 PLACES
(VO(−) AND VO(+))
1.02 (0.040) DIA
SOLDER-PLATED
BRASS, 7 PLACES
4.1 (0.16)
SIDE LABEL*
MIN†
48.3 (1.90)
10.16
(0.400)
10.16
(0.400)
5.1 (0.20)
12.7 (0.50)
4.8
(0.19)
48.26 (1.900)
STANDOFF,
4 PLACES
7.1 (0.28)
7.1
(0.28)
TRIM
17.78
(0.700)
50.8
(2.00)
35.56
(1.400)
25.40
(1.000)
35.56
(1.400)
25.40
(1.000)
VI(+)
ON/OFF
CASE
VI(−)VO(−)
−SEN
+SEN
VO(+)
MOUNTING INSERTS
M3 x 0.5 THROUGH,
4 PLACES
Lineage Power 15
Data Sheet
April 2008 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
Recommended Hole Pattern
Component-side footprint.
Dimensions are in millimeters and (inches).
8-716(F).j
Ordering Information
Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability.
Tabl e 4. De vi ce Cod e s
Optional features can be ordered using the suffixes shown in Table 5. To order more than one option, list the
device codes suffixes in numerically descending order. For example, the device code for a JAW075A module with
the following option is shown below:
Table 5. Device Options
Input
Voltage Output
Voltage Output
Power Output
Current Remote On/Off
Logic Device
Code Comcode
48 Vdc 5.0 Vdc 50 W 10 A Negative JAW050A1 108209974
48 Vdc 5.0 Vdc 75 W 15 A Negative JAW075A1 108064353
48 Vdc 5.0 Vdc 50 W 10 A Positive JAW050A 108449323
48 Vdc 5.0 Vdc 75 W 15 A Positive JAW075A 108449422
Short pins: 3.68 mm ± 0.25 mm (0.1 4 5 in. ± 0.01 0 in. ) JAW075A6
Option Device Code
Suffix
Short pins: 2.79 mm ± 0.25 mm
(0.110 in. +0.020 in./–0.010 in.) 8
Short pins: 3.68 mm ± 0.25 mm
(0.145 in. ± 0.010 in.) 6
10.16
(0.400)
10.16
(0.400)
12.7 (0.50)
4.8
(0.19)
MODULE OUTLINE
5.1 (0.20)
48.26 (1.900)
TERMINALS
48.3 (1.90)
57.9 (2.28)
50.8
(2.00) 25.40
(1.000)
35.56
(1.400)
61.0
(2.40)
35.56
(1.400)
25.40
(1.000)
17.78
(0.700)
TRIM
VI(+)
ON/OFF
CASE −SEN
+SEN
VO(+)
VI(−)VO(−)
Data Sheet
April 2008
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W
JAW050A and JAW075A Power Modules; dc-dc Converters:
April 2008
DS00-326EPS (Replaces DS00-325EPS)
World Wide Headquarters
Line age P ow er Corpora tio n
3000 Sky li ne Dri ve, Mesqui te, TX 75149, USA
+1-800-526-7819
(Out side U.S .A.: +1-972-284-2626)
www. lineag epower .co m
e- mail: te c hsuppo rt 1 @lineagepowe r.c om
A sia-Pacific Head qu art ers
T el: +65 6 416 4283
Europe, Mi ddle-East and Africa He adquarte rs
T el: +49 89 6089 286
Ind ia Head qu arter s
T el: +91 8 0 28411633
Lineage Power reserves the right to m ake changes to the produc t(s) or inform ation contained herei n without notice. No liability is assum ed as a res ult of their use or
appl ication. No ri ghts under any patent accompany the sale of any s uch product(s) or information.
© 2008 Lineage Power Corpor ation, (Mesquite, Texas) Al l International Rights Res er ved.
Ordering Information (continued)
Table 6. Device Accessories
Dimensions are in millimeters and (inches).
Accessory Comcode
1/4 in. transverse kit (heat sink, thermal pad, and screws) 407243989
1/4 in. longitudinal kit (heat sink, thermal pad, and screws) 407243997
1/2 in. transverse kit (heat sink, thermal pad, and screws) 407244706
1/2 in. longitudinal kit (heat sink, thermal pad, and screws) 407244714
1 in. transverse kit (heat sink, thermal pad, and screws) 407244722
1 in. longitudinal kit (heat sink, thermal pad, and screws) 407244730
1 1/2 in. transverse kit (heat sink, thermal pad, and screws) 407244748
1 1/2 in. longitudinal kit (heat sink, thermal pad, and screws) 407244755
8-2832(F).a
Figure 26. Longitudinal Heat Sink
1/4 IN.
1/2 IN.
1 IN.
1 1/2 IN.
61
57.9
(2.4)
(2.28)
8-2833(F)
Figure 27. Transverse Heat Sink
1/4 IN.
1/2 IN.
1 IN.
1 1/2 IN.
57.9
(2.28)
61
(2.4)
