Data Sheet
March 2008
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
The JC050F, JC075F, JC100F Power Modules use advanced,
surface-mount technology and deliver high-quality, efficient,
and compact dc-dc conversion.
Applications
nDistributed power architectures
nWorkstations
nEDP equipment
nTelecommunications
Options
nChoice of remote on/off logic configuration
nHeat sink available for extended oper ation
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 density
nHigh efficiency: 80% typical
nLow output noise
nConstant frequency
nIndustry-standard pinout
nMetal baseplate
n2:1 input voltage range
nOvertemperature protection (66 W only)
nRemote sense
nRemote on/off
nAdjustable output voltage
nCase ground pin
nUL* Recognized, CSA† Certified, VDE Licensed
*UL is a registered trademark of Underwriters Laboratories, Inc.
†CSA is a registered trademark of Canadian Standards Assn.
Description
The JC050F, JC075F, JC100F Power Modules are dc-dc converters that operate over an input voltage range
of 18 Vdc to 36 Vdc and provide a precisely regulated dc output. The outpu ts are fully isolated from the inputs,
allowing versatile polarity configuration s an d grounding connections. The modules have maximum power rat-
ings from 33 W to 66 W at a typical full-load efficiency of 80%.
The sealed modules offer a metal baseplate for exce lle nt thermal performance. Threaded-through holes are
provided to allow easy mounting or addition of a heat sink for high-temperature applications. The standard fea-
ture set includes remote sensing, output trim, and remote on/off for convenient flexibility in distributed power
applications.
2Lineage Power
Data Sheet
March 200818 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damag e to the d evice . These are abso-
lute stress ratings only. Functional operation of the d evice 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 protectio n, always use an input line fuse. The
safety agencies require a normal-blow , dc fuse with a maximum rating of 20 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 further information.
Parameter Symbol Min Max Unit
Input Voltage Continuous VI—50Vdc
I/O Isolation Voltage — — 1500 Vdc
Operating Case Temperature
(See Thermal Considerations section.) TC–40 100 °C
Storage Temperature Tstg –55 125 °C
Parameter Symbol Min Typ Max Unit
Operating Input Voltage VI18 28 36 Vdc
Maximum Input Current
(VI = 0 V to 36 V; IO = IO, max):
JC050F (See Figure 1)
JC075F
JC100F (See Figure 2.)
II, max
II, max
II, max
—
—
—
—
—
—
2.4
3.7
4.9
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 13.)
—— 5 —mAp-p
Input Ripple Rejection (120 Hz) — — 60 — dB
Lineage Power 3
Data Sheet
March 2008 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Electrical Specifications (continued)
Table 2. Output Specifications
Table 3. Isolation Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage
(Over all operating input voltage, resistive load,
and temperature conditions until end of life. See
Figure 15)
All VO3.20 — 3.40 Vdc
Output Voltage Set Point
(VI = 28 V; IO = IO, max; TC = 25 °C) All VO, set 3.25 3.3 3.35 Vdc
Output Regulation:
Line (VI = 18 V to 36 V)
Load (IO = IO, min to IO, max)
Temperat ur e (TC = –40 °C to +100 °C)
All
All
All
—
—
—
—
—
—
0.01
0.05
15
0.1
0.2
50
%
%
mV
Output Ripple and Noise Voltage
(See Figure 14.):
RMS
Peak-to-peak (5 Hz to 20 MHz) All
All —
——
——
—40
150 mVrms
mVp-p
External Load Capacitance (electrolytic) All — 0 — 10,000 µF
Output Current
(At IO < IO, min, the modules may exceed output
ripple specifications.)
JC050F
JC075F
JC100F
IO
IO
IO
0.5
0.5
0.5
—
—
—
10
15
20
A
A
A
Output Current-limit Inception
(VO = 90% of VO, nom)JC050F
JC075F
JC100F
IO, cli
IO, cli
IO, cli
—
—
—
12.0
18.0
23.0
—
—
—
A
A
A
Output Short-circuit Current (VO = 250 mV ) All — — 170 — %IO, max
Efficiency (VI = 28 V; IO = IO, max; TC = 70 °C) JC050F
JC075F
JC100F
η
η
η
78
78
78
81
81
80
—
—
—
%
%
%
Dynamic Response
(ΔIO/Δt = 1 A/10 µs, VI = 28 V, TC = 25 °C):
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
—
—
—
—
—
—
—
—
3.8
300
3.8
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
March 200818 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F 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 Feature Descriptions for additional information.
Parameter Min Typ Max Unit
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) 2,600,000 hr.
Weight — — 100 (3.5) g (oz.)
Parameter Symbol Min Typ Max Unit
Remote On/Off Signal Interface
(VI = 0 V to 36 V; open collector or equivalent compatible;
signal referenced to VI(–) terminal; see Figure 15 and
Feature Descriptions.):
JCxxxF1 Preferred Logic:
Logic Low—Module On
Logic High—Module Off
JCxxxF 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 12)
(IO = 80% of IO, max; VO within ±1% of steady state)
Von/off
Ion/off
Von/off
Ion/off
—
0
—
—
—
—
—
—
—
—
20
1.2
1.0
15
50
35
V
mA
V
µA
ms
Output Voltage Adjustment (See Feature Descrip tions.):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim) —
——
60 —
—0.5
110 V
%VO, nom
Output Overvoltage Clamp VO, clamp 4.0 — 5.0 V
Overtemperature Shutdown
(66 W only; see Feature Descriptions.) Tc — 105 — °C
Lineage Power 5
Data Sheet
March 2008 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Characteristic Curves
The following figures provide typical characteristics for the JC050F, JC075F, JC100F power modules. The figures
are identical for both on/off configurations.
8-1585 (C)
Figure 1. Typical JC050F Input Characteristics at
Room Temperature
8-1586 (C)
Figure 2. Typical JC100F Input Characteristics at
Room Temperature
8-1587 (C)
Figure 3. Typical JC050F Output Characteristics at
Room Temperature
8-1588 (C)
Figure 4. Typical JC075F Output Characteristics at
Room Temperature
4 8 12 16 20 24
0.0
1.5
INPUT V OLTAGE, VO (V)
1.0
2.0
3
6
0
0.5
28 32
2.5
3.0
IO = 10.0 A
IO = 5.0 A
IO = 0.5 A
INPUT CURRENT, I I (A)
4 8 12 16 20 24
0
3
INPUT V OLTAGE, VO (V)
2
4
3
6
0
1
28 32
5
6IO = 20.0 A
IO = 10.0 A
IO = 1.0 A
INPUT CURRENT, II
(A)
12 45 11 13
0.0
2.5
OUTPUT CURRENT, IO (A)
1.5
1.0
2.0
3.5
1
5
0
3.0
0.5
36789
10 12 14
VI = 36 V
VI = 24 V
VI = 18 V
OUTPUT V OLTAGE, VO (V)
24 12
14 16 18
0.0
2.5
OUTPUT CURRENT, I
O
(A)
1.5
1.0
2.0
3.5
2
0
0
3.0
0.5
8 106
V
I
= 36 V
V
I
= 28 V
V
I
= 18 V
OUTPUT V OL TAGE, V
O
(V)
Data Sheet
March 2008
66 Lineage Power
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Characteristic Curves (continued)
8-1589 (C)
Figure 5. Typical JC100F Output Characteristics at
Room Temperature.
8-1590 (C)
Figure 6. Typical JC050F Converter Efficiency vs.
Output Current at Room Temperature.
8-1591 (C)
Figure 7. Typical JC075F Converter Effi ciency vs.
Output Current at Room Temperature
8-1592 (C)
Figure 8. Typical JC100F Converter Effi ciency vs.
Output Current at Room Temperature
2416
18 20 22
0.0
2.5
OUTPUT CURRENT, IO (A)
1.5
1.0
2.0
3.5
2
4
0
3.0
0.5
8 126 10 14
VI = 18 V
VI = 28 V
VI = 36 V
OUTPUT VOL TAGE, VO (V)
3 4 5 76 8
70
76
OUTPUT CURRENT, IO (A)
74
73
75
9
78
1
0
2
77
72
71
79
80
EFFICIENCY, η (%)
VI = 18 V
VI = 24 V
VI = 36 V
4 6 8 1210 14
70
76
OUTPUT CURRENT, IO (A)
74
73
75
78
2
77
72
71
79
80
EFFICIENCY, η (%)
VI = 18 V
VI = 28 V
VI = 36 V
77
73
70357 9 11 13 15 17 19 2
0
76
OUTPUT CURRENT, IO (A)
74
75
72
EFFICIENCY, η (%)
71
79
78
4 6 8 10 12 14 16 18
V
I
= 18 V
V
I
= 27 V
V
I
= 36 V
Lineage Power 7
Data Sheet
March 2008 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Characteristic Curves (continued)
8-1903 (C)
Figure 9. Typical JC100F Output Ripple Voltage at
Room Temperature, and 20 A Output
8-1904 (C)
Figure 10.Typical JC100F Transient Response to
Step Decrease in Load from 50% to 25%
of Full Load at Room Temperature and
28 V Input (Waveform Averaged to
Eliminate Ripple Component.)
8-1905 (C)
Figure 11.Typical JC100F Transient Response to
Step Increase in Load from 50% to 75%
of Full Load at Room Temperature and
28 V Input (Waveform Averaged to
Eliminate Ripple Component.)
8-1906 (C)
Figure 12.Typical Start-Up from Remote On/Of f
JC100F1; lO = Full Load
TIME, t (1 µs/div)
OUTPUT VOLTAGE, VO (V)
(20 mV/div)
18 V
28 V
36 V
TIME, t (50 µs/div)
OUTPUT VOL TAGE, V
O
(V
)
(100 mV/div)
OUTPUT CURRENT, I
O
(A)
(1 A/div)
TIME, t (50 µs/div)
OUTPUT VOLT AGE, VO (V
)
(100 mV/div)
OUTPUT CURRENT, IO
(A)
(1 A/div)
TIME, t (2 ms/div)
OUTPUT VOL T A GE, VO (V)
(1 V/div)
REMO TE ON/OFF
VOLTAGE, VON/OFF (V)
Data Sheet
March 2008
88 Lineage Power
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Test Configurations
8-203 (C).l
Note:Measure input reflected-ripple current with a simulated source
inductance (LTEST) of 12 µH. Cap acitor CS offset s possible bat-
tery impedance. Measure current as shown above.
Figure 13.Input Reflected-Ripple Test Setup
8-513 (C).d
Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or
tantalum 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 14.Peak-to-Peak Output Noise
Measurement Test Setup
8-749(C)
Note:All measurements are taken at the module terminals. When
socketing, place Kelvin connections at module terminals to
avoid measurement errors due to socket contract resistance.
Figure 15. Output Voltage and Efficiency
Measurement Test Setup
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 13, a 33 µF
electrolytic capacitor (ESR < 0.7 Ω at 100 kHz)
mounted close 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
installed in co mpliance with the spacing and sep aration
requirements of the end-use safety agency standard,
i.e., UL-1950, CSA 22.2-950, and EN60950.
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements.
If the input meets extra-low vo ltage (ELV) require-
ments, then the converter’s output is considered ELV.
The input to these units is to be provided with a maxi-
mum 20 A normal-blow fuse in the ungrounded lead.
Electrical Descriptions
Current Limit
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and can endure current limiting for an unlim-
ited duration. At the point of current-limit inception, the
unit shifts from voltage control to current control. If the
output voltage is pulled very low during a severe fault,
the current- limit circuit can e xhibit ei ther foldback or t ai-
lout characteristics (output current decrease or
increase). The unit operates normally once the output
current is brought back into its specified range.
TO OSCILLOSCOPE
12 µH
C
S
220 µF
ESR < 0.1 Ω
@ 20 ˚C, 100 kHz
V
I
(+)
V
I
(–)
BATTERY 33 µF
CURRENT
PROBE
L
TEST
ESR < 0.7 Ω
@ 100 kHz
V
O
(+)
V
O
(–)
1.0 µF RESISTIVE
LOAD
SCOPE
COPPER STRIP
10 µF
VI(+)
IIIO
SUPPLY
CONTACT
RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD
SENSE(+)
VI(–)
VO(+)
VO(–)
SENSE(–)
ηVO+()–VO–()()[]IO
VI+()–VI–()()[]II
-------------------------------------------------------
⎝⎠
⎛⎞
x 100 =
Lineage Power 9
Data Sheet
March 2008 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Feature Descriptions
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 (code suffix “1”) is the factory-preferred configura-
tion.
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 16). 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 remot e on /o ff feature, do on e of the fo l-
lowing:
nFor negativ e log ic, sh or t ON / OF F pin to V I(–).
nFor positive logic, leave ON/OFF pin open.
8-720 c
Figure 16.Remote On/Off Implementation
Remote Sense
Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connection s. Th e vo ltage betw ee n th e rem ote - sen se
pins and the output terminals must not exceed the out-
put voltag e sense range given in the Feature Specifica-
tions table, i.e.:
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V
The voltage between the VO(+) and VO(–) terminals
must not exceed 3.8 V. This limit includes any increase
in voltage du e to remote-sense compensation and out-
put voltage set-point adjustment (trim), see Figure 17.
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.
8-651 m
Figure 17. Effective Circuit Configur ation for
Single-Module Remote-S ense Ope rat ion
Output Voltage Set- Point Adjustment
(Trim)
Output voltage trim allows the user to increase or
decrease the output volt age set point of a module. This
is accomplished by connecting an external resistor
between the TRIM pin and either the SENSE(+) or
SENSE(–) pins. With an external resistor between the
TRIM and SENSE(–) pins (Radj-down), the output voltage
set point (VO, adj) decreases (see Figure 18). The fol-
lowing equation determines th e required external-r esis-
tor value to obta in a percentage output volt ag e chang e
of Δ%.
The test results for this configuration are displayed in
Figure 19. This figure applies to all output voltages.
With an external resistor connected between th e TRIM
and SENSE(+) pins (Radj-up), the output voltage set
point (VO, adj) increases (see Figure 20).
SENSE(+)
VO(+)
SENSE(–)
VO(–)
VI(–)
+
–
Ion/off ON/OFF
VI(+)
LOAD
Von/off
V
O
(+)
SENSE(+)
SENSE(–)
V
O
(–)
V
I
(+)
V
I
(-)
I
O
LOAD
CONTACT AND
DISTRIBUTION LOSSES
SUPPLY I
I
CONTACT
RESISTANCE
Radj-down 100
Δ%
----------2–
⎝⎠
⎛⎞
kΩ=
Data Sheet
March 2008
1010 Lineage Power
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Feature Descriptions (continued)
Output Voltage Set-Point Adjustment
(Trim) (continued)
The following equation determines the required exter-
nal-resistor value to obt ain a percentage output volta ge
change of Δ%.
The test results for this configura tion ar e displayed in
Figure 21.
The voltage between the VO(+) and VO(–) terminals
must not exceed 3.8 V. This limit includes any increase
in voltage due to remote-sense compensation and out-
put voltage set-point adjustment (trim). See Figure 17.
If not using the trim feature, leave the TRIM pin open.
8-748 b
Figure 18. Circuit Configuration to Decrease
Output Voltage
8-879
Figure 19. Resistor Selection for Decreased
Output Voltage
8-715 b
Figure 20. Circuit Configuration to Increase
Output Voltage
8-880 a
Figure 21. Resistor Selection f or In creased Outp ut
Voltage
Output Overvoltage Clamp
The output overvoltage clamp consists of control cir-
cuitry, independent of the primary regulation loop, that
monitors the volta ge on the output terminals. The con-
trol loop of the clamp has a higher voltage set point
than the primary loop (see Feature Specifications
table). This provides a redundant voltage control that
reduces the risk of output overvoltage.
Overtemperature Protection (Shutdown)
The 66 W module features an overtemperature
protection circuit to safeguard against thermal damage.
The circuit shuts down the module when the maximum
case temperature is exceeded. The module restarts
automatically after cooling.
Radj-up VO100 Δ%+()
1.225Δ%
--------------------------------------100 2Δ%+()
Δ%
----------------------------------
–
⎝⎠
⎛⎞
kΩ=
VI(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–) Radj-down
RLOAD
010203040
100
1k
100k
1M
% CHANGE IN OUTPUT VOLTAGE (Δ%)
10k
ADJUSTMENT RESISTOR VALUE (Ω)
VI(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–)
Radj-up RLOAD
02 4 6 10
10M
%
CHANGE IN OUTPUT VOLTAGE (
Δ
%)
8
1M
100k
10k
ADJUSTMENT RESISTOR VALUE (
Ω
)
Lineage Power 11
Data Sheet
March 2008 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Thermal Considerations
Introduction
The power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliab le operation of the unit.
Heat-dissipating components inside the unit are ther-
mally coupled to the case. Heat is removed by conduc-
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 22.
8-716 f
Note: Top view, pin locations are for reference.
Measurements shown in millimeters and (inches).
Figure 22. Case Temperature Measurement
Location
The temperature at this location should not exce ed
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 limit this temperature to a
lower value for extremely high reliability.
For additional information on these modules, refer to the
Thermal Management JC-, JFC-, JW-, and JFW -Series
50 W to 150 W Board-Mounted Power Modules Technical
Note (TN97-008EPS).
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figure 23 shows the maximum
power that can be dissipated by the module without
exceeding the maximum case temperature versus local
ambient temperature (TA) for natural convection
through 4 m/s (800 ft./min.).
Note that the natural convection condition was mea-
sured at 0.05 m/s to 0.1 m/s (1 0 ft./min. to 20 ft./min.);
however, systems in which these power modules may
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 23 is
shown in the followin g ex am p l e.
Example
What is the minimum airflow necessary fo r a JC100F
operating at nominal line, an output current of 20 A,
and a maximum ambient temperature of 40 °C?
Solution
Given: VI = 28 V
IO = 20 A
TA = 40 °C
Determine PD (Use Figure 26.):
PD = 18.2 W
Determine airflow (v) (Use Figure 23.):
v = 2.3 m/s (450 ft./min.)
8-1150 a
Figure 23. Forced Convection Power Derating with
No Heat Sink; Either Orientation
38.0 (1.50) MEASURE CASE
VI(–)
ON/OFF
CASE
+ SEN
TRIM
– SEN
VI(+)
VO(–)
VO(+)
7.6 (0.3)
TEMPERATURE HERE
010203040 10
0
0
35
LOCAL AMBIENT TEMPERATURE, T
A (˚C)
POWER DISSIPATION, PD (W)
25
20
10
90
80706050
4.0 m/s (800 ft./min.)
0.1 m/s (NAT. CONV.)
(20 ft./min.)
0.5 m/s (100 ft./min.)
1.0 m/s (200 ft./min.)
1.5 m/s (300 ft./min.)
2.0 m/s (400 ft./min.)
2.5 m/s (500 ft./min.)
3.0 m/s (600 ft./min.)
3.5 m/s (700 ft./min.)
5
15
30
Data Sheet
March 2008
1212 Lineage Power
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Thermal Considerations (continued)
Heat transfer Without Heat Sinks (continued)
8-1594
Figure 24. JC050F Power Dissipation vs.
Output Current
8-1595
Figure 25. JC075F Power Dissipation vs.
Output Current
8-1596
Figure 26. JC100F Power Dissipation vs.
Output Current
Heat Transfer with Heat Sinks
The power modules have through-threaded, M3 x 0.5
mounting holes, which enable heat sinks or cold pla tes
to attach to the module. The mounting torque must not
exceed 0.56 N–m (5 in.–lb.). For a screw attachment
from the pin side, the recommended hole size on the
customer’s PWB around the mounting holes is
0.130 ± 0.005 inches. If a larger hole is used, the
mounting torque from the pin side must not exceed
0.25 N–m (2.2 in.–lb.).
Thermal derating with heat sinks is expressed by using
the overall therm al re sistance of the mo d ule. Total
module thermal resistance (θca) is defin e d as the ma x-
imum case temperature rise (ΔTC, max) divided by the
module power dissipation (PD):
The location to measure case temperature (TC) is
shown in Figure 22. Case-to-ambient thermal resis-
tance vs. airflow is shown, for vari ou s hea t sink co nf ig-
urations and heights, in Figure 27. These curves were
obtained by experimental testing of heat sinks, which
are offered in the product catalog.
23 56
4
OUTPUT CURRENT, I
O
(A)
10
12
1
0
1
9
5
8
6
78
11
49
7
V
I
= 36 V
V
I
= 27 V
V
I
= 18 V
POWER DISSIPATION, P
D
(W)
2345 8
0
18
OUTPUT CURRENT, I
O
(A)
14
6
16
POWER DISSIPATION, PD (W)
100 11113
20
1
5
12
10
8
4
67 9 12 14
2
VI = 18 V
VI = 28 V
VI = 36 V
4681012
0
20
OUTPUT CURRENT, I
O
(A)
16
8
18
POWER DISSIPATION, P
D
(W)
140
24
16
218
22
2
0
14
12
10
2
6
4
V
I
= 36 V
V
I
= 28 V
V
I
= 18 V
θca ΔTCmax,
PD
---------------------TCTA–()
PD
------------------------
==
Lineage Power 13
Data Sheet
March 2008 18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Thermal Considerations (continued)
Heat transfer with Heat Sinks (continued)
8-1153
Figure 27. Case-to-Ambient Thermal Resistance
Curves; Either Orientation
These measured resistances are from heat transfer
from the sides and bottom of the m odule as well as the
top side with the attached 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 Figure 27 had a
thermal-co nd uc tive dry pad betwee n th e cas e an d the
heat sink to minimize contact resistance. The use of
Figure 27 is shown in the following example
Example
If an 85 °C case temperature is desired, what is the
minimum airflow necessary? Assume the JC100A
module is operating at nominal line and an output cur-
rent of 20 A, maximum ambient air temperature of
40 °C, and the heat sink is 0.5 in.
Solution
Given: VI = 28 V
IO = 20 A
TA = 40 °C
TC = 85 °C
Heat sink = 0.5 in.
Determine PD by using Figure 26:
PD = 18.2 W
Then solve the following equation:
Use Figure 27 to determine air velocity for the 0.5 inch
heat sink.
The minimum airflow necessary for the JC100F
module is 1.5 m/s (300 ft./min.).
00.5
(100) 1.0
(200) 1.5
(300) 2.0
(400) 2.5
(500) 3.0
(600)
0
1
5
6
7
8
AIR VELOCITY MEASURED IN m/s (ft./min.)
4
3
2
CASE-TO-AMBIENT THERMAL
RESISTANCE, RCA (°C/W)
1 1/2 IN HEAT SINK
1 IN HEAT SINK
1/2 IN HEAT SINK
1/4 IN HEAT SINK
NO HEAT SINK
θca TCTA–()
PD
------------------------
=
θca 85 40–()
18.2
------------------------
=
θca 2.47 °C/W=
Data Sheet
March 2008
1414 Lineage Power
18 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
Thermal Considerations (continued)
Custom Heat Sinks
A more detailed model can be used to determine the
required thermal resistance of a heat sink to provide
necessary cooling. The total module resistance can be
separated into a resist ance from case-to-sink (θcs) and
sink-to-amb i en t (θsa) shown below (Figure 28).
8-1304
Figure 28. Resistance fr om 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.
Layout Considerations
Copper paths must not be routed beneath the power
module mounting inserts.
PDTCTSTA
θcs θsa
→
θsa TCTA–()
PD
-------------------------θcs–=
15 Lineage Power
Data Sheet
March 200818 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F 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
8-1945
* Side labels include Lineage name, product designation, safety agency markings, input/output voltage and current ratings, and bar code.
57.9 (2.28) MAX
61.0
(2.40)
MAX
5.1 (0.20) MIN
12.70 ± 0.5
(0.500 ± 0.020) 2.06 (0.081) DIA
SOLDER-PLATED BRASS,
2 PLACES–(OUTPUT AND
+OUTPUT)
1.02 (0.040) DIA
SOLDER-PLATED
BRASS, 7 PLCS
SIDE LABEL*
10.16
(0.400)
–SEN
TRIM
+SEN
CASE
ON/OFF
MOUNTING INSERTS
M3 x 0.5 THROUGH,
4 PLACES
10.16
(0.400)
5.1 (0.20)
48.3 (1.90)
48.26
(1.900)
12.7 (0.50)
4.8
(0.19)
17.78
(0.700)25.40
(1.000)
35.56
(1.400)
25.40
(1.000)
50.8
(2.00)
35.56
(1.400)
VI (–) VO (–)
VO (+)VI (+)
Data Sheet
March 200818 Vdc to 36 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
JC050F, JC075F, JC100F Power Modules: dc-dc Converters;
March 2008
DS97-550EPS
World Wide He a dquar te rs
Lin e age Pow er Corp ora tion
3000 Sky li ne Dri ve, M esquite, TX 75149, USA
+1-800-526-7819
(Outsid e U .S.A .: +1-972-284-2626)
www .linea gepower.com
e-mail : techsu pport1@lineag epo wer.com
As ia - P a c if ic He a dqua rters
T el: +65 6416 4283
Eur op e, Midd le-East and A fri ca Headq uarters
T el: +49 89 6089 286
Ind ia Headqu arters
T el: +91 80 28411633
Li neage Power reserves the right to m ake changes to the produc t(s) or information contai ned herein without notice. No l iability is assumed as a resul t of their use or
application. No rights under any patent acc ompany the sale of any suc h product(s) or information.
© 2008 Lineage Power Corporation, (M esquite, Texas) All International Rights Res erved.
Recommended Hole Pattern
Component-side footprint.
Dimensions are in millimeters and (inches).
8-1945
Ordering Information
10.16
(0.400)
10.16
(0.400)
12.7 (0.50)
48.3 (1.90)
48.26
(1.900)
4.8
(0.19)
MOUNTING INSERTS
MODULE OUTLINE
5.1 (0.20)
57.9 (2.28) MAX
17.78
(0.700)
25.40
(1.000)
35.56
(1.400)
25.40
(1.000)
50.8
(2.00)
35.56
(1.400)
61.0
(2.40)
MAX
–SEN
TRIM
+SEN
CASE
ON/OFF
VI (+) VO (+)
VO (–)
VI (–)
3.30 ± 0.15 (0.130 ± 0.005)
4 PLCS
Input
Voltage Output
Voltage Output
Power Remote On/
Off Logic Device
Code Comcode
28 V 3.3 V 33 W negative JC050F1 107314684
28 V 3.3 V 49.5 W negative JC075F1 107573289
28 V 3.3 V 66 W negative JC100F1 107314700
28 V 3.3 V 33 W positive JC050F 107309890
28 V 3.3 V 49.5 W positive JC075F TBD
28 V 3.3 V 66 W positive JC100F 107309973
