Data Sheet
April 2008
JAHW050F, JAHW075F, and JAHW100F Power Modules:
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 33 W to 66 W
Applications
nDistributed power architectures
nComputer equipment
nCommunications equipment
Options
nChoice of remote on/off logic configuration
nLatching protection features
Features
nCompatible with RoHS EU Directive 2002/95/EC (-Z Ver-
sions)
nCompatible in RoHS EU Directive 2002/95/EC with lead
solder exemption (non -Z versions)
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
nVery high efficiency: 88% typical
nLow output noise
nConstant frequency
nIndustry-standard pinout
nMetal baseplate
n2:1 input voltage range
nOvertemperature protection (hiccup mode)
nOvercurrent protection (hiccup mode)
nOutput overvoltage protection (hiccup mode)
nRemote sense
nRemote on/off
nAdjustable output voltage
nCase ground pin
nISO * 9001 Certified manufacturing facilities
nMeets the voltage and current requirements for ETSI
300-132-2 and complies with and is Licensed for Basic
Insulation rating per EN60950 (-B version only)
nUL† 60950 Recognized, CSA‡ 22.2 No. 60950-00
Certified, and VDE § 0805 (IEC60950, IEC950) Licensed
nCE mark meets 73/23/EEC and 93/68/EEC
directives**
The JAHW Series Power Modules use advanced, surface-
mount technology and deliver high-quality, efficient, and
compact dc-dc conversion.
Description
The JAHW050F, JAHW075F, and JAHW100F Power Modules are dc-dc converters that operate over an input voltage range
of 36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the inputs, allowing ver-
satile polarity configurations and grounding connections. The modules have maximum power ratings from 33 W to 66 W at a
typical full-load efficiency of 88%.
The sealed modules offer a metal baseplate for excellent thermal performance. Threaded-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.
** 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.)
RoHS Compliant
2Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These 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 further 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); see Figures 1—3:
JAHW050F
JAHW075F
JAHW100F
(VI = 36 V to 75 V; IO = IO, max); see Figures 1—3:
JAHW050F
JAHW075F
JAHW100F
II, max
II, max
II, max
II, max
II, max
II, max
—
—
—
—
—
—
—
—
—
—
—
—
1.2
1.8
2.4
1.2
1.8
2.4
A
A
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 16.)
II —5—mAp-p
Input Ripple Rejection (120 Hz) — — 60 — dB
Lineage Power 3
Data Sheet
April 2008 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Electrical Specifications (continued)
Table 2. Output Specifications
* Stability consideration, (See Design Considerations, Output Capacitance Section)
† These are manufacturing test limits. In some situations, results may differ.
‡ Some characteristic are specified with 10 μF aluminum and 1 μF ceramic.
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 3.25 3.3 3.35 Vdc
Output Voltage
(Over all operating input voltage, static resistive
load, and temperature conditions until end of
life. See Figure 18.)
All VO3.20 — 3.40 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 17.):
RMS
Peak-to-peak (5 Hz to 20 MHz)
All
All
—
—
—
—
—
—
50
100
mVrms
mVp-p
External Load Capacitance All — 0‡—*µF
Output Current
(At IO < IO, min, the modules may exceed output
ripple specifications.)
JAHW050F
JAHW075F
JAHW100F
IO
IO
IO
0.5
0.5
0.5
—
—
—
10
15
20
A
A
A
Output Current-limit Inception
(VO = 90% of VO, nom)
JAHW050F
JAHW075F
JAHW100F
IO, cli
IO, cli
IO, cli
—
—
—
12
18
23
15†
20†
25†
A
A
A
Output Short-circuit Current (VO = 250 mV) All — — 170 — %IO, max
Efficiency (VI = 48 V; IO = IO, max; TC = 70 °C) JAHW050F
JAHW075F
JAHW100F
η
η
η
—
—
—
88
88.6
89.2
—
—
—
%
%
%
Switching Frequency All — — 340 — kHz
Dynamic Response
(ΔIO/Δt = 1 A/10 µs, VI = 48 V, TC = 25 °C;
tested with a 10 µF aluminum and a 1.0 µF
tantalum capacitor across the load.):
Load Change from IO = 50% to 75% of IO, max:
Peak Deviation
Settling Time (VO < 10% of peak deviation)
Load Change from IO = 50% to 25% of IO, max:
Peak Deviation
Settling Time (VO < 10% of peak deviation)
All
All
All
All
—
—
—
—
—
—
—
—
2
200
2
200
—
—
—
—
%VO, set
µs
%VO, set
µs
Parameter Min Typ Max Unit
Isolation Capacitance — 2500 — pF
Isolation Resistance 10 — — MΩ
4Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
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.
* These are manufacturing test limits. In some situations, results may differ.
Parameter Min Typ Max Unit
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) 2,700,000 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; see Figure 19 and
Feature Descriptions.):
JAHWxxxF1 Preferred Logic:
Logic Low—Module On
Logic High—Module Off
JAHWxxxF Optional Logic:
Logic Low—Module Off
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 15.)
(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 Descriptions.):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)
—
—
—
60
—
—
0.5
110
V
%VO, nom
Output Overvoltage Protection VO, sd 4.0* — 5.0* V
Overtemperature Protection
(See Feature Descriptions.)
TC—110— °C
Data Sheet
April 2008
Lineage Power 5
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Characteristic Curves
The following figures provide typical characteristics for the power modules. The figures are identical for both on/off
configurations.
8-2244 (F)
Figure 1. Typical JAHW050F Input Characteristics
at Room Temperature
8-2291 (F)
Figure 2. Typical JAHW075F Input Characteristics
at Room Temperature
8-2503 (F)
Figure 3. Typical JAHW100F Input Characteristics
at Room Temperature
8-2245 (F)
Figure 4. Typical JAHW050F Converter Efficiency
vs. Output Current at Room Temperature
1.3
0
INPUT VOLTAGE, VI (V)
INPUT CURRENT, II (A)
10 20 30 40 50 60 70 75
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.0
5 152535455565
IO = 10 A
IO = 5 A
IO = 0.5 A
2.0
10
INPUT VOLTAGE, VI (V)
INPUT CURRENT, II (A)
20 30 40 5015 25 35 4550
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
55 60 65 70 75
IO = 15 A
IO = 7.5 A
IO = 0.75 A
2.5
10
INPUT VOLTAGE, VI (V)
INPUT CURRENT, II (A)
20 30 40 5015 25 35 45 55 60 65 70 75
2.0
1.5
1.0
0.5
0.0
50
IO = 20 A
IO = 10 A
IO = 1 A
91
2
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
468103579
VI = 36 V
VI = 48 V
VI = 75 V
90
89
88
87
86
85
84
83
82
81
6Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Characteristic Curves (continued)
8-2311 (F)
Figure 5. Typical JAHW075F Converter Efficiency
vs. Output Current at Room Temperature
8-2485 (F)
Figure 6. Typical JAHW100F Converter Efficiency
vs. Output Current at Room Temperature
8-2293 (F)
Note: See Figure 17 for test conditions.
Figure 7. Typical JAHW050F and JAHW075F
Output Ripple Voltage at Room
Temperature and IO = IO, max
8-2486 (F)
Note: See Figure 17 for test conditions.
Figure 8. Typical JAHW100F Output Ripple Voltage
at Room Temperature and IO = IO, max
90
2
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
46810357911 12 13 14 15
VI = 75 V
VI = 48 V
VI = 36 V
89
88
87
86
85
84
83
82
81
80
91
2
OUTPUT CURRENT, IO (A)
EFFICIENCY, η (%)
46810357911 12 13 14 15
90
89
88
87
86
85
84
83
82
81
16 17 18 19 20
VI = 75 V
VI = 48 V
VI = 36 V
OUTPUT VOLTAGE, VO (V)
(20 mV/div)
TIME, t (1 μs/div)
VI = 36 V
VI = 48 V
VI = 75 V
OUTPUT VOLTAGE, VO (V)
(50 mV/div)
TIME, t (2 μs/div)
36 V
48 V
75 V
Data Sheet
April 2008
Lineage Power 7
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Characteristic Curves (continued)
8-2378 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 9. Typical JAHW050F 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.)
8-2294 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 10. Typical JAHW075F 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.)
8-2487 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 11. Typical JAHW100F 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.)
8-2379 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 12. Typical JAHW050F 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.)
OUTPUT VOLTAGE, VO (V)
(100 mV/div)
TIME, t (50 μs/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
2.5 A
OUTPUT VOLTAGE, V
O
(V)
(100 mV/div)
TIME, t (100
μ
s/div)
OUTPUT CURRENT, I
O
(A)
(1 A/div)
3.75 A
OUTPUT CURRENT, IO (A)
(1 A/div)
TIME, t (50 μs/div)
10 A
5 A
OUTPUT VOLTAGE, VO (V)
(100 mV/div)
OUTPUT VOLTAGE, VO (V)
(10 mV/div)
TIME, t (50 μs/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
5 A
88 Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Characteristic Curves (continued)
8-2295 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 13. Typical JAHW075F 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.)
8-2488 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 14. Typical JAHW075F 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.)
8-2296 (F)
Note: Tested with a 10 µF aluminum and a 1.0 µF tantalum capacitor
across the load.
Figure 15. JAHW075F Typical Start-Up from
Remote On/Off; IO = IO, max
OUTPUT VOLTAGE, VO (V)
(100 mV/div)
TIME, t (100
μ
s/div)
OUTPUT CURRENT, I
O
(A)
(1 A/div)
OUTPUT CURRENT, IO (A)
(1 A/div)
TIME, t (50 μs/div)
15 A
10 A
OUTPUT VOLTAGE, VO (V)
(100 mV/div)
REMOTE ON/OFF,
VON/OFF (V)
TIME, t (5 ms/div)
OUTPUT VOLTAGE, VO (V)
(1 V/div)
Lineage Power 9
Data Sheet
April 2008 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
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 16. 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 17. 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 18. 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 16, 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.
Output Capacitance
High output current transient rate of change (high di/dt)
loads may require high values of output capacitance to
supply the instantaneous energy requirement to the
load. To minimize the output voltage transient drop dur-
ing this transient, low E.S.R. (equivalent series resis-
tance) capacitors may be required, since a high E.S.R.
will produce a correspondingly higher voltage drop dur-
ing the current transient.
Output capacitance and load impedance interact with
the power module’s output voltage regulation control
system and may produce and ‘unstable’ output condi-
tion for the required values of capacitance and E.S.R..
Minimum and maximum values of output capacitance
and of the capacitor’s associated E.S.R. may be dic-
tated, depending on the modules control system.
The process of determining the acceptable values of
capacitance and E.S.R. is complex and is load-depen-
dant. Lineage provides Web-based tools to assist the
power module end-user in appraising and adjusting the
effect of various load conditions and output capaci-
tances on specific power modules for various load con-
ditions.
1. Access the web at www.lineagepower.com
2. Under Products, click on the DC-DC link
3. Under Design Tools, click on Application Tools Download
4. Various design tools will be found, including tools for determining
stability of power module systems§.
§Not available for all codes, Where not available, use minimum values in table
above
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 μFRESISTIVE
SCOPE
COPPER STRIP
10 μFLOAD
VO(+)
VO(–)
VI(+)
IIIO
SUPPLY
CONTACT
CONTACT AND
LOAD
SENSE(+)
VI(–)
VO(+)
VO(–)
SENSE(–)
RESISTANCE
DISTRIBUTION LOSSES
ηVO(+) – VO(–)[]IO
VI(+) – VI(–)[]II
------------------------------------------------
⎝⎠
⎛⎞
x 100 %=
1010 Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
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, CSA C22.2 No. 60950-00, and VDE
0805 (IEC60950, IEC950).
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 voltage
(SELV), all of the following must be true:
nThe input source is to be provided with reinforced
insulation from any hazardous voltages, including 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 pin and ground.
The power module has extra-low voltage (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 ungrounded lead.
Feature Descriptions
Overcurrent Protection
To provide protection in an output overload condition,
the unit is provided with internal shutdown and auto-
restart mechanism.
At the instance of current-limit inception, the module
enters a "hiccup" mode of operation 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 for a sufficient interval of time
until the fault is cleared.
A latch-off option is also available.
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 19). 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 to turn the unit on:
nFor negative logic, short ON/OFF pin to VI(–).
nFor positive logic, leave ON/OFF pin open.
8-720 (F).c
Figure 19. Remote On/Off Implementation
Remote Sense
Remote sense minimizes the effects of distribution
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 sense range given in the Feature Specifica-
tions table, i.e.:
[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V
SENSE(+)
VO(+)
SENSE(–)
VO(–)
VI(–)
+
–
Ion/off
ON/OFF
VI(+)
LOAD
Von/off
Lineage Power 11
Data Sheet
April 2008 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Feature Descriptions (continued)
Remote Sense (continued)
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum output overvoltage shut-
down value indicated in the Feature Specifications
table. This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 20.
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 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.
8-651 (F).m
Figure 20. 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 the 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 positioned close to the mod-
ule.
If not using the trim feature, leave the TRIM pin open.
With an external resistor between the TRIM and
SENSE(–) pins (Radj-down), the output voltage set point
(VO, adj) decreases (see Figure 21). The following equa-
tion determines the required external-resistor value to
obtain a percentage output voltage change of Δ%.
With an external resistor connected between the TRIM
and SENSE(+) pins (Radj-up), the output voltage set
point (VO, adj) increases (see Figure 22).
The following equation determines the required exter-
nal-resistor value to obtain a percentage output voltage
change of Δ%.
The voltage between the VO(+) and VO(–) terminals
must not exceed the minimum output overvoltage shut-
down value indicated in the Feature Specifications
table. This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim). See Figure 20.
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 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.
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=
1212 Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Feature Descriptions (continued)
Output Voltage Set-Point Adjustment
(Trim) (continued)
8-748 (F).b
Figure 21. Circuit Configuration to Decrease
Output Voltage
8-715 (F).b
Figure 22. 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 moonitors
the voltage on the ouput terminals. If the voltage on the
output terminals exceed the overvoltage protection
threshold, the module enters a hiccup mode of opera-
tion whereby it shuts down and automaticall 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.
A latch-off option is also available.*
*Protection latch-off causes the ouput to be disabled until input
power is recyeled or until the remote on-off is recycled off-on.
Overtemperature Protection
To provide protection in a overtemperature condition,
the unit is equipped with an overtemperature circuit. In
the event of such a fault, the module enters into a hic-
cup mode of operation 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.
A latcho-off option is also available.*
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 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 23.
8-716 (F).h
Note: Top view, pin locations are for reference only. Measurements
shown in millimeters and (inches).
Figure 23. Case Temperature Measurement
Location
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 limit this temperature to a
lower value for extremely high reliability.
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
VO(+)
VO(–)
VI(+)
VI(–)
(1.20)
Lineage Power 13
Data Sheet
April 2008 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Thermal Considerations (continued)
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat
transfer via convection. Figure 24 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 (10 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 24 is
shown in the following example.
Example
What is the minimum airflow necessary for a
JAHW100F operating at VI = 48 V, an output current of
20 A, and a maximum ambient temperature of 55 °C?
Solution
Given: VI = 48 V
IO = 20 A
TA = 55 °C
Determine PD (Use Figure 27.):
PD = 8.0 W
Determine airflow (v) (Use Figure 24.):
v = 0.51 m/s (100 ft./min.)
8-2504 (F)
Figure 24. Forced Convection Power Derating with
No Heat Sink; Either Orientation
8-3355 (F)
Figure 25. JAHW050F Power Dissipation vs.
Output Current at 25 °C
8-3356 (F)
Figure 26. JAHW075F Power Dissipation vs.
Output Current at 25 °C
8- 3357 (F)
Figure 27. JAHW100F Power Dissipation vs.
Output Current at 25 °C
10 20 30 40 50 60
0
9
LOCAL AMBIENT TEMPERATURE, TA (°C)
6
1000
3
70 80
12
90
NATURAL
CONVECTION
1.0 m/s (200 ft./min.)
2.0 m/s (400 ft./min.)
3.0 m/s (600 ft./min.)
4.0 m/s (800 ft./min.)
POWER DISSIPATION, PD (W)
6
5
0
OUTPUT CURRENT, IO (A)
POWER DISSIPATION, PD (W)
4
3
2
1
0
12345678910
VI = 36 V
VI = 48 V
VI = 75 V
8
0
OUTPUT CURRENT, I
O
(A)
POWER DISSIPATION, P
D
(W)
12345678910
7
6
5
4
3
2
1
0
11 12 13 14 15
V
I
= 75 V
V
I
= 48 V
V
I
= 36 V
10
0
OUTPUT CURRENT, I
O
(A)
POWER DISSIPATION, P
D
(W)
2 4 6 8 101214161820
9
8
6
5
4
3
2
1
0
7V
I
= 75 V
V
I
= 48 V
V
I
= 36 V
1414 Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Thermal Considerations (continued)
Heat Transfer with Heat Sinks
The power modules have through-threaded, M3 x 0.5
mounting holes, which enable 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 23. Case-to-ambient thermal resis-
tance vs. airflow is shown, for various heat sink config-
urations and heights, in Figure 28. These curves were
obtained by experimental testing of heat sinks, which
are offered in the product catalog.
8-2505 (F)
Figure 28. Case-to-Ambient Thermal Resistance
Curves; Either Orientation
These measured resistances are from heat transfer
from the sides and bottom of the module 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 heat sink by itself.
The module used to collect the data in Figure 28 had a
thermal-conductive dry pad between the case and the
heat sink to minimize contact resistance. The use of
Figure 28 is shown in the following example.
Example
If an 85 °C case temperature is desired, what is the
minimum airflow necessary? Assume the JAHW100F
module is operating at VI = 48 V and an output current
of 20 A, maximum ambient air temperature of 55 °C,
and the heat sink is 1/4 inch.
Solution
Given: VI = 48 V
IO = 20 A
TA = 55 °C
TC = 85 °C
Heat sink = 1/4 inch
Determine PD by using Figure 27:
PD = 8.0 W
Then solve the following equation:
Use Figure 28 to determine air velocity for the 1/4 inch
heat sink.
The minimum airflow necessary for the JAHW100F
module is 1.12 m/s (220 ft./min.).
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 resistance from case-to-sink (θcs) and
sink-to-ambient (θsa) as shown in Figure 29.
8-1304 (F).e
Figure 29. Resistance from Case-to-Sink and
Sink-to-Ambient
θca ΔTCmax,
PD
---------------------TCTA–()
PD
------------------------
==
7
2
0
4
6
8
1
3
5
0.5
(100)
1.0
(200)
1.5
(300)
2.0
(400)
2.5
(500)
3.0
(600)
0.0
(0)
AIR VELOCITY, m/s (ft./min.)
CASE-TO-AMBIENT THERMAL
RESISTANCE, θCA (°C/W)
1 IN. HEAT SINK
1 1/2 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
θca TCTA–()
PD
------------------------
=
θca 85 55–()
8.0
------------------------
=
θca 3.75 °C/W=
PD
TCTSTA
θcs θsa
Lineage Power 15
Data Sheet
April 2008 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Thermal Considerations (continued)
Custom Heat Sinks (continued)
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,
please refer to the FLTR100V10 data sheet
(DS99-294EPS).
Layout Considerations
Copper paths must not be routed beneath the power
module mounting inserts. For additional layout guide-
lines, refer to the FLTR100V10 data sheet
(DS99-294EPS).
θsa TCTA–()
PD
-------------------------θcs–=
1616 Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Through-Hole Lead-Free Soldering Infor-
mation
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-compli-
ant finish that is compatible with both Pb and Pb-free wave
soldering processes. A maximum preheat rate of 3°C/s is
suggested. The wave preheat process should be such that
the temperature of the power module board is kept below
210°C. For Pb solder, the recommended pot temperature is
260°C, while the Pb-free solder pot is 270°C max. Not all
RoHS-compliant through-hole products can be processed
with paste-through-hole Pb or Pb-free reflow process. If addi-
tional information is needed, please consult with your Lineage
Electronics Power System representative for more details.
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 and
Cleaning Application Note (AP01-056EPS).
Lineage Power 17
Data Sheet
April 2008 dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
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).m
* Side label includes Lineage name, product designation, safety agency markings, input/output voltage and current ratings, and bar code.
† The case pin may be 1.3(0.05) longer than the other pins.
57.9 (2.28)
61.0
(2.40)
48.3 (1.90)
10.16
(0.400)
MOUNTING INSERTS
M3 x 0.5 THROUGH,
4 PLACES
10.16
(0.400)
5.1 (0.20)
12.7 (0.50)
4.7
(0.19)
48.26 (1.900)
STANDOFF,
4 PLACES
7.1 (0.28)
7.1
(0.28)
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(–)
CASE
ON/OFF
VI(+)
VO(–)
VO(+)
–SEN
TRIM
+SEN
18 Lineage Power
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
Recommended Hole Pattern
Component-side footprint.
Dimensions are in millimeters and (inches).
8-716 (F).m
Ordering Information
Table 4. Device Codes
Optional features can be ordered using the suffixes shown in Table 5. The suffixes follow the last letter of the
device code and are placed in descending order. For example, the device codes for a JAHW075F module with the
following options are shown below:
Positive logic JAHW075F
Negative logic JAHW075F1
Table 5. Device Options
Input
Voltage
Output
Voltage
Output
Power
Remote On/Off
Logic
Device
Code Comcode
48 V 3.3 V 33 W Negative JAHW050F1 108289448
48 V 3.3 V 50 W Negative JAHW075F1 108219320
48 V 3.3 V 66 W Negative JAHW100F1 108064510
48 V 3.3 V 33 W Positive JAHW050F 108866245
48 V 3.3 V 66 W Positive JAHW100FZ CC109101441
48 V 3.3 V 50 W Negative JAHW075F1Z CC109122693
48 V 3.3 V 66 W Negative JAHW100F1Z CC109129524
Option Suffix
Negative remote on/off logic 1
Positive remote on/off logic —
10.16
(0.400)
10.16
(0.400)
12.7 (0.50)
4.7
(0.19)
MODULE OUTLINE
5.1 (0.20)
48.26 (1.900)
TERMINALS
48.3 (1.90)
MOUNTING HOLES
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(−)
Note: Legacy device codes may contain a -B option suffix to indicate 100% factory Hi-Pot tested to the isolation voltage specified in the Abso-
lute Maximum Ratings table. The 100% Hi-Pot test is now applied to all device codes, with or without the -B option suffix. Existing comcodes for
devices with the -B suffix are still valid; however, no new comcodes for devices containing the -B suffix will be created.
Data Sheet
April 2008
dc-dc Converters; 36 to 75 Vdc Input, 3.3 Output; 33 W to 66 W
JAHW050F, JAHW075F, and JAHW100F Power Modules:
April 2008
FDS01-013EPS (Replaces FDS01-012EPS)
World W ide Headquarters
Lineage Po wer Co rp oration
30 00 Skyline Drive, Mesquite, TX 75149, USA
+1-800-526-7819
(Outsid e U.S.A .: +1- 97 2-2 84 -2626)
www.lineagepower.com
e-m ai l: tec h s up por t1 @ li n ea ge p ow e r .co m
Asia-Pacific Headquarters
Tel: +65 6 41 6 4283
Europe, Middle-East and Africa Headquarters
Tel: +49 89 6089 286
India Headquarters
Tel: +91 8 0 28411633
Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or
application. No rights under any patent accompany the sale of any such product(s) or information.
© 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved.
