Data Sheet
October 1999
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
The JFW -Series Po wer Modules use advanced, surface-mount
technology and deliver high-quality, efficient, compact dc-dc
conversion.
Applications
■
Redundant and/or distributed power architectures
■
Workstations
■
Computer equipment
■
Communications equipment
Options
■
Heat sinks available for extended operation
■
Choice of primary remote on/off logic configuration
■
Delayed current-limit shutdown
Description
The JFW -Series Power Modules are dc-dc con v erters
that operate over an input voltage range of 36 Vdc to
75 Vdc and provide a precisely regulated dc output.
The output is fully isolated from the input, allowing v er-
satile polarity configurations and grounding connec-
tions. The modules ha ve maxim um power r atings from
50 W to 150 W at typical full-load efficiencies of 84%.
The sealed modules have metal baseplates for excel-
lent thermal performance. Threaded-through holes are
provided for easy mounting or adding a heat sink for
high-temperature applications. Listed abo ve are the
enhanced f eatures for convenience and flexibility in
redundant and/or distributed pow er applications .
Features
■
Small size: 61.0 mm x 57.9 mm x 12.7 mm
(2.40 in. x 2.28 in. x 0.50 in.)
■
High power density
■
High efficiency: 84% typical
■
Low output noise
■
Constant frequency
■
Metal baseplate
■
2:1 input voltage range
■
Anti-rollback circuit
■
Overcurrent protection
■
Current-limit set-point adjustment
■
Primary and secondary remote on/off
■
Remote sense
■
Adjustable output voltage: 60% to 110% of V
O, nom
■
Output overvoltage protection
■
Overvoltage set-point adjustment
■
Synchronization
■
Forced load sharing (parallelable)
■
Parallelable with FW300A1
■
Output current monitor
■
Overtemperature protection
■
Power good signal
■
Thermal warning signal
■
Case ground pin
■
ISO
* 9001 Certified manufacturing facilities
■
UL
†
1950
Recognized,
CSA
‡
C22.2 No. 950-95
Certified, and VDE 0805 (EN60950, IEC950)
Licensed
■
CE mark meets 73/23/EEC and 93/68/EEC direc-
tives
§
*
ISO
is a registered trademark of the International Organization of
Standardization.
†
UL
is a registered trademark of Underwriters Laboratories, Inc.
‡
CSA
is a registered trademark of Canadian Standards Assn.
§This product is intended for integration into end-use equipment.
All the required procedures for CE marking of end-use equip-
ment should be followed. (The CE mark is placed on selected
products.)
2 Lucent Technologies Inc.
Data Sheet
October 1999
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A 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; howe ver , 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 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:
JFW050A, JFW075A
JFW100A, JFW150A
Transient (100 ms; JFW100A, JFW150A only)
V
I
V
I
V
I, trans
—
—
—
75
80
100
Vdc
Vdc
V
I/O Isolation Voltage (for 1 minute) — — 1500 Vdc
Operating Case Temperature
(See Thermal Considerations section.) T
C
–40 100 °C
Storage Temper ature T
stg
–55 125 °C
Parameter Symbol Min Typ Max Unit
Operating Input Voltage V
I
36 48 75 Vdc
Maximum Input Current
(V
I
= 0 V to 75 V; I
O
= I
O
,
max
; see Figures 1—4.):
JFW050A
JFW075A
JFW100A
JFW150A
I
I, max
I
I, max
I
I, max
I
I, max
—
—
—
—
—
—
—
—
1.7
2.6
3.5
5.2
A
A
A
A
Maximum Input Current
(V
I
= 36 V to 75 V; I
O
= I
O
,
max
; see Figures 1—4.):
JFW050A
JFW075A
JFW100A
JFW150A
I
I, max
I
I, max
I
I, max
I
I, max
—
—
—
—
—
—
—
—
2.2
3.5
4.7
7.2
A
A
A
A
Inrush Transient i
2
t — — 1.0 A
2
s
Input Reflected-ripple Current, Peak-to-peak
(5 Hz to 20 MHz, 12 µH source impedance;
see Figure 17.)
I
I
— 5 — mAp-p
Input Ripple Rejection (120 Hz) — — 60 — dB
Lucent Technologies Inc. 3
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
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
(V
I
= 48 V; I
O
= I
O, max
; T
C
= 25 °C) All V
O, set
4.92 5.0 5.08 Vdc
Output Voltage (Over all operating input voltage,
resistive load, and temperature conditions until
end of life; see Figure 19.)
All V
O
4.85 — 5.15 Vdc
Output Regulation:
Line (V
I
= 36 V to 75 V)
Load (I
O
= I
O, min
to I
O, max
)
Temperature (T
C
= –40 °C to +100 °C)
All
All
All
—
—
—
—
—
—
0.01
0.05
15
0.1
0.2
50
%V
O
%V
O
mV
Output Ripple and Noise Voltage (See
Figure 18.):
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 I
O
< I
O, min
, the module may exceed output
ripple specifications.)
JFW050A
JFW075A
JFW100A
JFW150A
I
O
I
O
I
O
I
O
0.5
0.5
0.5
0.5
—
—
—
—
10
15
20
30
A
A
A
A
Output Current-limit Inception
(untrimmed; V
O
= 90% of V
O, nom
)JFW050A
JFW075A
JFW100A
JFW150A
I
O, cli
I
O, cli
I
O, cli
I
O, cli
—
—
—
—
11.5
17.3
23.0
34.5
13.0
†
14.5
†
26
†
39
†
A
A
A
A
Output Short-circuit Current (V
O
= 250 mV) All — — 170 — %I
O, max
Efficiency
(V
I
= 48 V; I
O
= I
O, max
; T
C
= 70 °C; see
Figures 9—12 and 19.)
JFW050A
JFW075A
JFW100A
JFW150A
η
η
η
η
—
—
—
—
84
84
84
84
—
—
—
—
%
%
%
%
Switching Frequency All — — 500 — kHz
Dynamic Response
(
∆
I
O
/
∆
t = 1 A/µs, VI = 48 V, T
C
= 25 °C (tested
with a 10 µF aluminum and a 1.0 µF ceramic
capacitor across the load)):
Load Change from I
O
= 50% to 75% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10% of peak deviation)
Load Change from I
O
= 50% to 25% of I
O, max
:
Peak Deviation
Settling Time (V
O
< 10% of peak deviation)
All
All
All
All
—
—
—
—
—
—
—
—
150
300
150
300
—
—
—
—
mV
µs
mV
µs
Parameter Min Typ Max Unit
Isolation Capacitance — 2500 — pF
Isolation Resistance 10 — — MΩ
4 Lucent Technologies Inc.
Data Sheet
October 1999dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
General Specifications
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions and Design Considerations sections for further information.
Table 4. Feature Specifications
Parameter Min Typ Max Unit
Calculated MTBF (IO = 80% of IO, max; TC = 40 °C) 2,000,000 hr
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 20 and
Feature Descriptions.):
JFWxxxA1 Preferred Logic:
Both Primary and Secondary Referenced Remote
On/Off:
Logic Low—Module On
Logic High—Module Off
JFWxxxA Optional Logic (optional for primary referenced
remote on/off only):
Primary Referenced Remote On/Off:
Logic Low—Module Off
Logic High—Module On
Secondary Referenced Remote On/Off:
Logic Low—Module On
Logic High—Module Off
Logic Low:
Ion/off = 1.0 mA
Von/off = 0.0 V
Logic High (open collector):
Ion/off = 0.0 µA
Leakage Current
Turn-on Time
(IO = 80% of IO, max; VO within ±1% of steady state; see
Figure 16)
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 (trim) Range —
——
60 —
—0.5
110 V
%VO, nom
Output Overvoltage Protection — 5.9* — 7.0* V
Overvoltage Set-Point Adjustment Range (shutdown) — 50 — 100 %VO, clamp, nom
Synchronization:
Clock Amplitude
Clock Pulse Width
Fan-out
Capture Frequency Range
—
—
—
—
4.00
0.4
—
425
—
—
—
—
5.00
—
1
575
V
µs
—
kHz
* These are manufacturing test limits. In some situations, results may differ.
Lucent Technologies Inc. 5
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Feature Specifications (continued)
Table 4. Feature Specifications (continued)
Solder, Cleaning, and Drying Considerations
Post solder cleaning is usually the final circuit-board assembly process prior to electrical testing. The result of inad-
equate circuit-board 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
Lucent Technologies
Board-Mounted Power Modules Soldering and Cleaning
Application Note (AP97-021EPS).
Parameter Symbol Min Typ Max Unit
Forced Load Share Accuracy — — 10 — %IO, rated
Output Current Monitor (IO = IO, max, TC = 70 °C):
JFW050A
JFW075A
JFW100A
JFW150A
IO, mon
IO, mon
IO, mon
IO, mon
—
—
—
—
0.410
0.273
0.205
0.137
—
—
—
—
V/A
V/A
V/A
V/A
Overtemperature Protection (See Figure 27.) TC— 105 — °C
Power Good Signal
(Open collector output; low level indicates power good.):
Output Sink Current (VO ≤ 1.5 V)
Maximum Voltage
High-state Internal Impedance to Ground
—
—
—
—
—
—
—
—
200
50
36
—
mA
V
kΩ
Thermal Warning Signal
(Open collector output; low level indicates overtemperature
shutdown is imminent.):
Output Sink Current (VO ≤ 1.5 V)
Maximum Voltage
High-state Internal Impedance to Ground
—
—
—
—
—
—
—
—
200
6
36
—
mA
V
kΩ
Current-Limit Set-Point Adjustment Range — 10 — 100 %IO, cli, nom
Overcurrent Protection Delay (optional) — — 4 — s
Data Sheet
October 1999
66 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Characteristic Curves
The f ollowing figures pro vide typical characteristics f or the pow er modules. The figures are applicable to both on/off
configurations.
8-2247 (C)
Figure 1. T ypical JFW050A Input Characteristics at
Room Temperature
8-2248 (C)
Figure 2. T ypical JFW075A Input Characteristics at
Room Temperature
8-2249 (C)
Figure 3. T ypical JFW100A Input Characteristics at
Room Temperature
8-2250 (C)
Figure 4. T ypical JFW150A Input Characteristics at
Room Temperature
1.8
10 20 30 5040 60
0.0
1.2
INPUT VOLTAGE, V
I
(
V
)
0.8
0.6
1.0
70
1.6
8
0
0
1.4
0.4
0.2
INPUT CURRENT, I
I
(A)
I
O
= 10 A
I
O
= 5 A
I
O
= 1 A
10 20 30 40 50
0.0
1.5
INPUT VOLTAGE, V
I
(V)
1.0
2.0
8
0
0
0.5
60 70
2.5
3.0
INPUT CURRENT, I
I
(A)
I
O
= 15 A
I
O
= 7.5 A
I
O
= 1.5 A
3.5
1.5
10 20 30 5040 60
0.0
3.0
INPUT VOLTAGE, V
I
(
V
)
2.0
2.5
1.0
0.5
70 8
0
0
4.0
INPUT CURRENT, I
I
(A)
I
O
= 20 A
I
O
= 10 A
I
O
= 2 A
10 20 30 40 50
0
3
INPUT VOLTAGE, V
I
(
V
)
2
4
8
0
0
1
60 70
5
6
INPUT CURRENT, I
I
(A)
I
O
= 30 A
I
O
= 16.5 A
I
O
= 3 A
Lucent Technologies Inc. 7
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Characteristic Curves (continued)
8-2251 (C)
Figure 5. Typical JFW050A Output Characteristics
at Room Temperature
8-2252 (C)
Figure 6. Typical JFW075A Output Characteristics
at Room Temperature
8-2253 (C)
Figure 7. Typical JFW100A Output Characteristics
at Room Temperature
8-2254 (C)
Figure 8. Typical JFW150A Output Characteristics
at Room Temperature
246810
0
3
OUTPUT CURRENT, I
O
(A)
2
4
1
6
0
1
12 14
5
6
V
I
= 75 V
V
I
= 54 V
V
I
= 36 V
OUTPUT VOLTAGE, V
O
(V)
5 10 2015 25
0.0
3.0
OUTPUT CURRENT, I
O
(
A
)
2.0
1.5
2.5
4.0
0
3.5
1.0
0.5
4.5
5.0
OUTPUT VOLTAGE, V
O
(V)
V
I
= 75 V
V
I
= 48 V
V
I
= 36 V
5 10 15 2520 30
0.0
3.0
OUTPUT CURRENT, I
O
(
A
)
2.0
1.5
2.5
4.0
0
3.5
1.0
0.5
4.5
5.0
OUTPUT VOLTAGE, V
O
(V)
V
I
= 75 V
V
I
= 54 V V
I
= 36 V
5 15 25 35
30 40
0.0
3.0
OUTPUT CURRENT, I
O
(
A
)
2.0
1.5
2.5
45
4.0
5
0
0
3.5
1.0
0.5
4.5
5.0
10 20
OUTPUT VOLTAGE, V
O
(V)
V
I
= 36 V
V
I
= 54 V
V
I
= 75 V
Data Sheet
October 1999
88 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Characteristic Curves (continued)
8-2255 (C)
Figure 9. Typical JFW050A Converter Efficiency
vs. Output Current at Room Temperature
8-2256 (C)
Figure 10. Typical JFW075A Converter Efficiency
vs. Output Current at Room Temperature
8-2257 (C)
Figure 11. Typical JFW100A Converter Efficiency
vs. Output Current at Room Temperature
8-2258 (C)
Figure 12. Typical JFW150A Converter Efficiency
vs. Output Current at Room Temperature
7 9 10
OUTPUT CURRENT, I
O
(
A
)
2
77.0
78.0
79.0
80.0
81.0
82.0
83.0
84.0
85.0
4 6 8
3 5
EFFICIENCY, η (%)
76.0
V
I
= 36 V
V
I
= 54 V
V
I
= 75 V
11.5 15.5
OUTPUT CURRENT, I
O
(
A
)
1.5
77.0
78.0
79.0
80.0
81.0
82.0
83.0
84.0
85.0
5.5 9.5 13.53.5 7.5
EFFICIENCY, η (%)
76.0
V
I
= 36 V
V
I
= 48 V
V
I
= 75 V
75.0
16 20
OUTPUT CURRENT, IO
(
A
)
2
75.0
77.0
78.0
79.0
80.0
81.0
82.0
83.0
84.0
85.0
6 14 18
4 10
EFFICIENCY, η (%)
76.0
8 12
V
I
= 36 V
V
I
= 54 V
V
I
= 75 V
0.2 0.4 0.6 0.8 1.0 1.2
76
82
OUTPUT CURRENT, IO (A)
80
79
81
84
1.80.0
83
78
1.4 1.6
77
85
86
EFFICIENCY, η (%)
VI = 36 V
VI = 54 V
VI = 75 V
Lucent Technologies Inc. 9
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Characteristic Curves (continued)
8-2259 (C)
Note: See Figure 18 for test conditions.
Figure 13. Typical JFW150A Output Ripple Voltage
at Room Temperature and 30 A Output
8-2260 (C)
Note: Tested with a 10 µF tantalum and a 1.0 µF ceramic capacitor
across the load.
Figure 14. Typical JFW150A Transient Response to
Step Decrease in Load from 50% to 25%
of Full Load at Room Temperature and
54 V Input (Waveform Averaged to
Eliminate Ripple Component.)
8-2261 (C)
Note: Tested with a 10 µF tantalum and a 1.0 µF ceramic capacitor
across the load.
Figure 15. Typical JFW150A Transient Response to
Step Increase in Load from 50% to 75%
of Full Load at Room Temperature and
54 V Input (Waveform Averaged to
Eliminate Ripple Component.)
8-2262 (C)
Note: Tested with an aluminum capacitor as indicated above and a
1.0 µF ceramic capacitor across the load.
Figure 16. Typical Start-Up from Remote On/Off
JFW150A1; IO = IO, max
TIME, t (1 µs/div)
OUTPUT VOLTAGE, VO (V)
(20 mV/div)
VI = 75 V
VI = 48 V
VI = 36 V
TIME, t (200 µs/div)
OUTPUT VOLTAGE, V
O
(V)
(100 mV/div)
OUTPUT CURRENT, I
O
(A)
(5 A/div)
15 A
7.5 A
TIME, t (200 µs/div)
OUTPUT VOLTAGE, V
O
(V)
(100 mV/div)
OUTPUT CURRENT, I
O
(A)
(5 A/div)
22.5 A
15 A
TIME, t (5 ms/div)
OUTPUT VOLTAGE, V
O
(V)
(2 V/div) REMOTE ON/OFF
VOLTAGE, V
ON/OFF
(V)
NO CAP
830 µF
1330 µF
4630 µF
9400 µF
Data Sheet
October 1999
1010 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Test Configurations
8-203 (C).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 17. Input Reflected-Ripple Test Setup
8-513 (C).b
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 18. 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 contact resistance.
Figure 19. 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 17, 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 compliance with the spacing and separation
requirements of the end-use safety agency standard,
i.e.,
UL
1950,
CSA
C22.2 No. 950-95, and VDE 0805
(EN60950, 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), f or the module’s output to be considered meet-
ing the requirements of safety extra-low voltage
(SELV), all of the following must be true:
■The input source is to be provided with reinforced
insulation from any hazardous v oltages, including the
ac mains.
■One VI pin and one V O pin are to be grounded or both
the input and output pins are to be kept floating.
■The input pins of the module are not operator acces-
sible.
■Another SELV reliability test is conducted on the
whole system, as required by the saf ety 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 v oltage (ELV) outputs
when all inputs are ELV.
The input to these units is to be provided with a maxi-
mum 20 A normal-blow fuse in the ungrounded lead.
TO OSCILLOSCOPE
12 µH V
I
(+)
V
I
(–)
CURRENT
PROBE
L
TEST
BATTERY C
S
220 µF
ESR < 0.1 Ω
@ 20 °C, 100 kHz 33 µF
ESR < 0.7 Ω
@ 100 kHz
V
O
(+)
V
O
(–)
1.0 µF RESISTIVE
LOAD
SCOPE
COPPER STRIP
10 µF
V
I
(+)
I
I
I
O
SUPPLY
CONTACT
RESISTANCE
CONTACT AND
DISTRIBUTION LOSSES
LOAD
SENSE(+)
V
I
(–)
V
O
(+)
V
O
(–)
SENSE(–)
ηVO+()
– V
O
–
()()[]
I
O
V
I
+
()
– V
I
–
()()[]
I
I
-------------------------------------------------------
x
100
%=
Lucent Technologies Inc. 11
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Feature Descriptions
Overcurrent Protection
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry and optional delay ed shutdo wn. At the point of
current-limit inception, the unit shifts from voltage con-
trol to current control. If the output voltage is pulled
very low during a severe fault, the current-limit circuit
can exhibit either foldback or tailout characteristics
(output current decrease or increase). The unit will
operate normally once the output current is brought
back into its specified range. If the module has the
optional delayed current-limit shutdown, the unit will
operate normally once the output current is brought
back to its specified range, provided the overcurrent
condition is removed before the module shuts down.
The current-limit set point can be reduced by connect-
ing a resistor between the overcurrent trim (OCTRIM)
pin and SENSE(–) pin. The resistor value is derived by
the following equation:
Where:
R
cl-adj
is the value of an external resistor between the
OCTRIM pin and SENSE(–) pin.
I
rated
is the output current rating of the module.
(not the output current-limit inception)
I
trim
is the trimmed value of the output current-limit
set point.
Remote On/Off
There are two remote on/off signals, a primary refer-
enced signal and a secondary referenced signal. Both
signals must be asserted on for the module to deliver
output power. If either signal is asserted off, the module
will not deliver output po w er. Both signals hav e internal
pull-up circuits and are designed to interface with an
open collector pull-down device. Typically, one on/off
signal will be permanently enabled by hardwiring it to
its return while the other on/off signal is used exclu-
sively for control.
Primary Remote On/Off
The primary remote on/off signal (ON/OFF) is a vailab le
with either positive or negativ e logic. P ositiv e logic turns
the module on during a logic high and off during a logic
low.
Negative logic remote on/off turns the module off during
a logic high and on during a logic low. Negative logic
(code suffix 1) is the f actory-preferred configuration.
To turn the power module on and off , the user m ust sup-
ply a s witch to control the voltage between the primary
remote on/off terminal (V
on/off, pri
) and the V
I
(–) terminal.
The s witch can be an open collector or equivalent (see
Figure 20). A logic low is V
on/off, pri
= 0 V to 1.2 V. The
maximum I
on/off, pri
during a logic low is 1 mA. The s witch
should maintain a logic low voltage while sinking 1 mA.
During a logic high, the maximum V
on/off, pri
generated b y
the power module is 15 V. The maximum allow ab le leak-
age current of the s witch at V
on/off, pri
= 15 V is 50 µA.
If not using the primary remote on/off f eature , do one of
the f ollo wing:
■
F or negativ e logic , short the ON/OFF pin to V
I
(–).
■
For positive logic, leave the ON/OFF pin open.
Secondary Remote On/Off
The secondary remote on/off signal (S-ON/OFF pin) is
only availab le with negativ e logic. The negative logic sig-
nal turns the module off during a logic high and on dur-
ing a logic low. To turn the pow er module on and off, the
user must supply a s witch to control the voltage between
the S-ON/OFF pin and the SENSE(–) pin (V
on/off, sec
).
The s witch can be an open collector or equivalent (see
Figure 20). A logic low is V
on/off, sec
= 0 V to 1.2 V. The
maximum I
on/off, s ec
during a logic low is 1 mA. The s witch
should maintain a logic low voltage while sinking 1 mA.
During a logic high, the maximum V
on/off, s ec
generated by
the power module is 15 V. The maxim um allowable leak-
age current of the s witch at V
on/off, sec
= 15 V is 50 µA.
If not using the secondary remote on/off feature , short
the S-ON/OFF pin to the SENSE(–) pin.
8-1398 (C)
Figure 20. Remote On/Off Implementation
Rcl-adj 11 Itrim 1.15 Irated–
1.15 Irated Itrim–
-----------------------------------------------------
k
Ω
=
SENSE(–)
VI(+)
ON/OFF
(PRIMARY)
VI(–)
(SECONDARY)
S-ON/OFF
+
–
Ion/off, sec
Von/off, sec
+
–
Ion/off, pri
Von/off, pri
Data Sheet
October 1999
1212 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Feature Descriptions
(continued)
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 giv en in the Feature Specifica-
tions table, i.e.:
[V
O
(+) – V
O
(–)] – [SENSE(+) – SENSE(–)]
≤
0.5 V
The voltage between the V
O
(+) and V
O
(–) terminals
must not exceed the output overvoltage shutdown volt-
age. This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim), see Figure 21.
For remote-sense operation with multiple paralleled
units, see the F orced Load Sharing (Par allel Operation)
section.
If not using the remote-sense feature to regulate the
output at the point of load, then connect SENSE(+) to
V
O
(+) and SENSE(–) to V
O
(–) 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 (C).m
Figure 21. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage Set-P oint Adjustment (Trim)
Output voltage trim (V
O
TRIM pin) enables the user to
increase or decrease the output voltage set point of a
module. This is accomplished by connecting an exter-
nal resistor between the V
O
TRIM pin and either the
SENSE(+) or SENSE(–) pins. The trim resistor should
be positioned close to the module.
If not using the trim feature , leav e the V
O
TRIM pin open.
With an external resistor between the V
O
TRIM and
SENSE(–) pins (R
adj-down
), the output voltage set point
(V
O, adj
) decreases (see Figure 22).
8-748 (C).e
Figure 22. Circuit Configuration to Decrease
Output V oltage
The following equation determines the required exter-
nal-resistor value to obtain a percentage output v oltage
change of
∆
%.
The test results for this configuration are displayed in
Figure 23. This figure applies to all output voltages.
V
O
(+)
SENSE(+)
SENSE(–)
V
O
(–)
V
I
(+)
V
I
(–)
I
O
LOAD
CONTACT AND
DISTRIBUTION LOSSES
SUPPLY I
I
CONTACT
RESISTANCE
VI(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
VOTRIM
SENSE(–) Radj-down
RLOAD
Radj-down 100
∆%
----------2–
k
Ω
=
Lucent Technologies Inc. 13
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Feature Descriptions
(continued)
Output Voltage Set-P oint Adjustment (Trim)
(continued)
8-879 (C)
Figure 23. Resistor Selection for Decreased
Output V oltage
With an external resistor connected between the
V
O
TRIM and SENSE(+) pins (R
adj-up
), the output volt-
age set point (V
O, adj
) increases (see Figure 24).
8-715 (C).g
Figure 24. Circuit Configuration to Increase
Output V oltage
The following equation determines the required exter-
nal-resistor value to obtain a percentage output v oltage
change of
∆
%.
The test results for this configuration are displayed in
Figure 25.
The voltage between the V
O
(+) and V
O
(–) terminals
must not exceed the output overvoltage shutdown volt-
age. This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-
point adjustment (trim).
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. 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.
8-880 (C).a
Figure 25. Resistor Selection for Increased Output
Voltage
0 10203040
100
1k
100k
1M
% CHANGE IN OUTPUT VOLTAGE (∆%)
10k
ADJUSTMENT RESISTOR VALUE (Ω)
VI(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
VOTRIM
SENSE(–)
Radj-up RLOAD
Radj-up VO100 ∆%+()
1.225 ∆%•
-------------------------------------- 100 2 ∆%•+()
∆%
---------------------------------------
–
k
Ω
=
0246 10
10k
100k
10M
% CHANGE IN OUTPUT VOLTAGE (∆%)
1M
ADJUSTMENT RESISTOR VALUE (Ω)
8
Data Sheet
October 1999
1414 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Feature Descriptions
(continued)
Output Overvoltage Protection
The output overvoltage shutdown consists of control
circuitry, independent of the primary regulation loop,
that monitors the voltage on the output terminals. The
control 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 and latches the
converter off if an overvoltage occurs.
Recovery from latched shutdown is accomplished by
cycling the dc input power off for at least 1.0 second or
by toggling the primary or secondary referenced
remote on/off signal for at least 1.0 second.
The overvoltage shutdown set point can be lowered b y
placing a resistor between the overvoltage trim
(OVTRIM) pin and SENSE(–) pin. This feature is useful
if the output voltage of the con verter has been trimmed
down and a corresponding reduction in o vervoltage trip
point is desired.
The resistance required from a given overvoltage nom-
inal set point is derived from the following equation:
Where:
R
ov-adj
is the value of an external resistor between the
OVTRIM pin and SENSE(–) pin.
V
ov-set
is the nominal adjusted set point of the overvolt-
age shutdown threshold.
Module Synchronization
Any module can be synchronized to any other module
or to an external clock using the SYNC IN or SYNC
OUT pins. The modules are not designed to operate in
a master/slav e configuration; that is, if one module f ails,
the other modules will continue to operate.
SYNC IN Pin
This pin can be connected either to an e xternal cloc k or
directly to the SYNC OUT pin of another JFW150x or
FW300x module.
If an external clock signal is applied to the SYNC IN
pin, the signal must be a 500 kHz (±50 kHz) square
wave with a 4 Vp-p amplitude. Operation outside this
frequency band will detrimentally affect the perfor-
mance of the module and must be avoided.
SYNC IN Pin
(continued)
If the SYNC IN pin is connected to the SYNC OUT pin
of another module, the connection should be as direct
as possible, and the V
I
(–) pins of the modules must be
shorted together.
Unused SYNC IN pins should be tied to V
I
(–). If the
SYNC IN pin is not used, the module will operate from
its own internal clock.
SYNC OUT Pin
This pin contains a clock signal referenced to the V
I
(–)
pin. The frequency of this signal will equal either the mod-
ule’s internal clock frequency or the frequency estab-
lished by an external clock applied to the SYNC IN pin.
When synchronizing several modules together, the
modules can be connected in a daisy-chain fashion
where the SYNC OUT pin of one module is connected
to the SYNC IN pin of another module. Each module in
the chain will synchronize to the frequency of the first
module in the chain.
To avoid loading effects, ensure that the SYNC OUT
pin of any one module is connected to the SYNC IN pin
of only one module. Any number of modules can be
synchronized in this daisy-chain fashion.
Forced Load Sharing (Parallel Operation)
For either redundant operation or additional power
requirements, the power module can be configured for
parallel operation with forced load sharing (see
Figure 26). For a typical redundant configuration,
Schottky diodes or an equivalent should be used to
protect against short-circuit conditions. Because of the
remote sense, the forward-voltage drops across the
Schottky diodes do not affect the set point of the volt-
age applied to the load. For additional power require-
ments, where multiple units are used to develop
combined power in excess of the rated maximum, the
Schottky diodes are not needed.
An internal anti-rollback circuit prevents either output
voltage from falling more than 1 V below the other dur-
ing light load operation.
Rov-adj 6.7 2
V
ov-set
–
V
ov-set
6.7
–
-------------------------------------
k
Ω
=
Lucent Technologies Inc. 15
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Feature Descriptions
(continued)
Forced Load Sharing (Parallel Operation)
(continued)
Good layout techniques should be observed for noise
immunity. To implement forced load sharing, the follow-
ing connections must be made:
■
The parallel pins of all units must be connected
together. The paths of these connections should be
as direct as possible.
■
All remote-sense pins must be connected to the
power bus at the same point. That is, connect all
remote-sense (+) pins to the (+) side of the power
bus at the same point, and connect all remote-sense
(–) pins to the (–) side of the power bus at the same
point. Close proximity and directness are necessary
for good noise immunity.
■
Add a 1000 pF capacitor across the PARALLEL pin
and SENSE(–) pin of each module. Locate the
capacitor as close to the module as possible.
8-581 (C).c
Figure 26. Wiring Configuration for Redundant
Parallel Operation
Output Current Monitor
The current monitor (CURMON) pin produces a dc volt-
age proportional to the dc output current of the module.
The voltage is referenced to the secondary SENSE(–)
pin and is typically 4.10 V at rated output current. For
paralleling with FW300x modules, consult the factory
for the V/A ratio. The output impedance of this pin is
approximately 20 k
Ω
, so customer detection circuitry
must have a high-impedance input.
Overtemperature Protection
These modules feature an overtemperature protection
circuit to safeguard against thermal damage. The cir-
cuit shuts down and latches off the module when the
maximum case temperature is exceeded. The module
can be restarted by cycling the dc input power for at
least 1.0 second or by toggling the primary or second-
ary referenced remote on/off signal for at least
1.0 second.
Power Good Signal
The power good signal (PWRGOOD pin) is an open-
collector, secondary-referenced pin that is pulled low
when all five of the following conditions are met:
1. The sensed output voltage is greater than half the
rated nominal output voltage.
2. The overvoltage shutdown latch is not set.
3. The thermal shutdown latch is not set.
4. The unit is not in current limit.
5. Secondary internal bias is present.
There is one situation where the power good signal can
be low even though the module has failed. This can
occur when the module is paralleled with other mod-
ules for additional output power (i.e., the output ORing
diodes would not be used). If one module power train
stops delivering power (fails), the other paralleled mod-
ule(s) would provide a voltage at the output pin of the
failed module. The failed module would then not detect
that its output power is not being deliv ered. How e v er , in
this situation, the current monitor pins of the paralleled
modules would indicate that current is not being deliv-
ered from one module and that module had failed.
For redundant applications, the ORing diodes would
keep the other module voltages from being applied to
the failed module output and the power good signal
would indicate a failure.
Thermal Warning Signal
The thermal warning (TEMPWARN) pin is a second-
ary-referenced, open-collector output that shorts to
SENSE(–) a few degrees before the module goes into
thermal shutdown. When the module temperature
cools, the thermal warning pin will open, but the unit
will remain latched off until the input power or the pri-
mary or secondary referenced remote on/off is recy-
cled for 1.0 second.
V
O
(–)
PARALLEL
SENSE(+)
SENSE(–)
V
O
(+)
CASE
V
I
(+)
ON/OFF
V
I
(–)
V
O
(–)
PARALLEL
SENSE(+)
SENSE(–)
V
O
(+)
CASE
V
I
(+)
ON/OFF
V
I
(–)
Data Sheet
October 1999
1616 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Thermal Considerations
Introduction
The JFW-Series power modules oper ate in a variety of
thermal environments; however, sufficient cooling
should be provided to help ensure reliable operation of
the units. Heat-dissipating components inside the units
are thermally coupled to the case. Heat is removed by
conduction, convection, and radiation to the surround-
ing environment. Proper cooling can be verified by
measuring the case temperature. Peak temperature
(T
C
) occurs at the position indicated in Figure 27.
8-1397 (C).a
Note: Top view, measurements shown in millimeters and (inches).
Pin locations are for reference only.
Figure 27. 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.
F or additional inf ormation regarding this module, ref er to
the Lucent T echnologies
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 28 shows the maximum
power that can be dissipated by the module without
e xceeding the maximum case temperature versus local
ambient temperature (T
A
) 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 this power module may be
used typically generate a natural convection airflow
rate of 0.3 m/s (60 ft./min.) due to other heat dissipating
components in the system. The use of Figure 28 is
shown in the following example.
Example
What is the minimum airflow necessary for a JFW150A
operating at V
I
= 54 V, an output current of 20 A, and a
maximum ambient temperature of 40 °C?
Solution
Given: V
I
= 54 V
I
O
= 20 A
T
A
= 40 °C
Determine P
D
(Use Figure 32.):
P
D
= 17 W
Determine airflow(v) (Use Figure 28.):
v = 2.0 m/s (400 ft./min.)
8-1150 (C).a
Figure 28. Forced Convection Po wer Derating with
No Heat Sink; Either Orientation
38.0 (1.50)
7.6 (0.3)
MEASURE CASE
TEMPERATURE HERE
010203040 100
0
35
LOCAL AMBIENT TEMPERATURE, TA (°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
Lucent Technologies Inc. 17
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Thermal Considerations
(continued)
Heat Transfer Without Heat Sinks
(continued)
8-1182 (C)
Figure 29. JFW050A Power Dissipation vs.
Output Current at 25 °C
8-1183 (C)
Figure 30. JFW075A Power Dissipation vs.
Output Current at 25 °C
8-1184 (C)
Figure 31. JFW100A Power Dissipation vs.
Output Current at 25 °C
8-1185 (C)
Figure 32. JFW150A Power Dissipation vs. Output
Current at 25 °C
Heat Transfer with Heat Sinks
The power module has through-threaded, M3 x 0.5
mounting holes, which enab le heat sinks or cold plates
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.).
01234567 10
0
3
6
8
10
12
OUTPUT CURRENT, IO
(
A
)
98
2
1
4
5
7
9
11
POWER DISSIPATION, PD (W)
VI = 54 V
VI = 36 V
VI = 72 V
0123 568910
0
2
4
8
16
20
OUTPUT CURRENT, I
O
(
A
)
POWER DISSIPATION, P
D
(W)
47
6
14
18
12
10
11 13 1412 15
V
I
= 54 V
V
I
= 36 V
V
I
= 72 V
POWER DISSIPATION, PD (W)
0 2 4 6 8 14161820
0
4
8
12
16
20
OUTPUT CURRENT, IO
(
A
)
12
10
2
6
10
14
18
VI = 54 V
VI = 36 V
VI = 72 V
POWER DISSIPATION, PD (W)
05101520 30
0
10
20
30
45
OUTPUT CURRENT, IO
(
A
)
25
5
15
25
35
40
VI = 36 V
VI = 54 V
VI = 72 V
Data Sheet
October 1999
1818 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Thermal Considerations
(continued)
Heat Transfer with Heat Sinks
(continued)
Thermal derating with heat sinks is expressed b y using
the ov er all thermal resistance of the module. Total mod-
ule thermal resistance (
θ
ca) is defined as the maximum
case temperature rise (
∆
T
C, max
) divided by the module
power dissipation (P
D
):
The location to measure case temperature (T
C
) is
shown in Figure 27. Case-to-ambient thermal resis-
tance vs. airflow for various heat sink configurations is
shown in Figure 33. These curves were obtained by
e xperimental testing of heat sinks, which are offered in
the product catalog.
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 33 had a
thermal-conductive dry pad between the case and the
heat sink to minimize contact resistance. The use of
Figure 33 is shown in the following example.
8-1153 (C).a
Figure 33. Case-to-Ambient Thermal Resistance
Curves; Either Orientation
Example
If an 85 °C case temperature is desired, what is the
minimum airflow necessary? Assume the JFW150A
module is operating at V
I
= 54 V and an output current
of 20 A, maximum ambient air temperature of 40 °C,
and heat sink of 1/2 inch.
Solution
Given: V
I
= 54 V
I
O
= 20 A
T
A
= 40 °C
T
C
= 85 °C
Heat sink = 1/2 inch
Determine P
D
by using Figure 32:
P
D
= 17 W
Then solve the following equation:
Use Figure 33 to determine air velocity for the 1/2 inch
heat sink. The minimum airflow necessary for the
JFW150A module is about 1.3 m/s (260 ft./min.).
θca ∆TC max,
PD
---------------------TCTA–()
PD
------------------------
==
0 0.5
(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
1 1/2 IN. HEAT SINK
1 IN. HEAT SINK
1/2 IN. HEAT SINK
1/4 IN. HEAT SINK
NO HEAT SINK
CASE-TO-AMBIENT THERMAL
RESISTANCE, Θ
CA
(°C/W)
θca TCTA–()
PD
------------------------
=
θca 85 40–()
17
------------------------
=
θca 2.6 °C/W=
Lucent Technologies Inc. 19
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
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 resistance from case-to-sink (
θ
cs) and
sink-to-ambient (
θ
sa) shown below (Figure 34).
8-1304 (C)
Figure 34. 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 provides
a conservative estimate for such instances.
EMC Considerations
For assistance with designing for EMC compliance,
please refer to the FLTR100V10 data sheet
(DS98-152EPS).
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
(DS98-152EPS).
PDTCTSTA
cs sa
θsa TCTA–()
PD
-------------------------θcs–=
20 Lucent Technologies Inc.
Data Sheet
October 1999dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A 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.)
T op View
Side View
Bottom View
8-1397 (C).b
* Side label includes Lucent logo , product designation, saf ety agency markings, input/output v oltage and current ratings, and bar code .
Note: The control pins are on a 2.54 mm (0.100 in.) grid.
57.9 (2.28) MAX
61.0
(2.40)
MAX
0.64 (0.025) SQUARE
SOLDER-PLATED
BRONZE, 10 PLACES
2.06 (0.081) DIA
SOLDER-PLATED BRASS,
2 PLACES (–OUTPUT AND
+OUTPUT
)
5.1 (0.20)
MIN
12.7 ± 0.5
(0.500 ± 0.020)
SIDE LABEL*
1.02 (0.040) DIA
SOLDER-PLATED
BRASS, 6 PLACES
2.54 (0.100)
SENSE(–)
TEMPWARN
OCTRIM
PWRGOOD
PARALLEL
SENSE(+)
VoTRIM
OVTRIM
CURMON
S-ON/OFF
VI(+)
CASE
VO(–)
SYNC OUT
SYNC IN
ON/OFF
VI(–)
VO(+)
48.3 (1.90)
7.62
(0.300)
12.70
(0.500)
4.8
(0.19)
5.1 (0.20)
5.08 (0.200)
5.08 (0.200)
5.08 (0.200)
10.16 (0.400)
10.16 (0.400)
12.7 (0.50)
50.8
(2.00)
35.56
(1.400)
Lucent Technologies Inc. 21
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Recommended Hole Pattern
Component-side footprint.
Dimensions are in millimeters and (inches).
8-1397 (C).b
2.54 (0.100)
2.54
(0.100)
7.62
(0.300)
5.08 (0.200)
5.08 (0.200)
5.08 (0.200)
2.54
(0.100)
MOUNTING INSERTS
MODULE OUTLINE
5.1 (0.20)
48.3 (1.90)
57.9 (2.28) MAX
4.8
(0.19)
35.56
(1.400)
12.7
(0.50)
10.16 (0.400)
35.56
(1.400)
61.0
(2.40)
MAX
48.26 (1.900)
VI(+)
CASE
VO(–)
VO(+)
SYNC OUT
SYNC IN
ON/OFF
VI(–)
DETAIL A
PARALLEL
PWRGOOD
OCTRIM
TEMPWARN
SENSE(–)
S-ON/OFF
CURMON
OVTRIM
VOTRIM
SENSE(+)
50.8
(2.00)
Data Sheet
October 1999
2222 Lucent Technologies Inc.
dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Ordering Information
Table 5. Device Codes
Optional f eatures can be ordered using the suffix es shown in Table 6. The suffix es f ollo w the last letter of the de vice
code and are placed in descending order. For example , the device codes for a JFW150A module with the f ollo wing
options are shown below:
Table 6. Device Options
Input
Voltage Output
Voltage Output
Power Remote
On/Off Logic Device
Code Comcode
48 V 5.0 V 50 W Negative JFW050A1 108225152
48 V 5.0 V 75 W Negative JFW075A1 108247974
48 V 5.0 V 100 W Negative JFW100A1 108298977
48 V 5.0 V 150 W Negative JFW150A1 108008921
48 V 5.0 V 50 W P ositiv e JFW050A TBD
48 V 5.0 V 75 W P ositiv e JFW075A TBD
48 V 5.0 V 100 W P ositive JFW100A TBD
48 V 5.0 V 150 W P ositive JFW150A TBD
Positive logic JFW150A
Negative logic JFW150A1
Negative logic and delayed current-limit shutdown JFW150A31
Option Suffix
Delayed current-limit shutdown 3
Negative remote on/off logic 1
Positive remote on/off logic —
Lucent Technologies Inc. 23
Data Sheet
October 1999 dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Ordering Information (continued)
Table 7. Device Accessories
Dimensions are in millimeters and (inches).
8-2832 (C)
Figure 35. Longitudinal Heat Sink 8-2833 (C)
Figure 36. Transverse Heat Sink
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
1/4 in. transverse kit (heat sink, thermal pad, and screws) 407243989
57.9 (2.28)
61
(2.4)
1 IN.
1 1/2 IN.
1/4 IN.
1/2 IN.
1 IN.
1 1/2 IN.
61 (2.4)
1/4 IN.
1/2 IN.
57.9
(2.28)
Data Sheet
October 1999dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W
JFW050A, JFW075A, JFW100A, JFW150A Power Modules:
Lucent Technologies Inc. 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.
Copyright © 1999 Lucent Technologies Inc.
All Rights Reserved
Printed in U.S.A.
October 1999
DS98-382EPS (Replaces DS97-099EPS) Printed On
Recycled Paper
For additional information, contact your Lucent Technologies Account Manager or the following:
POWER SYSTEMS UNIT: Network Products Group, Lucent Technologies Inc., 3000 Skyline Drive, Mesquite, TX 75149, USA
+1-800-526-7819 (Outside U.S.A.: +1-972-284-2626, FAX +1-888-315-5182) (product-related questions or technical assistance)
INTERNET: http://www.lucent.com/networks/power
E-MAIL: techsupport@lucent.com
ASIA PACIFIC: Lucent Technologies Singapore Pte. Ltd., 750A Chai Chee Road #05-01, Chai Chee Industrial Park, Singapore 469001
Tel. (65) 240 8041, FAX (65) 240 8053
CHINA: Lucent Technologies (China) Co. Ltd., SCITECH Place No. 22 Jian Guo Man Wai Avenue, Beijing 100004, PRC
Tel. (86) 10-6522 5566 ext. 4187, FAX (86) 10-6512 3694
JAPAN: Lucent Technologies Japan Ltd., Mori Building No. 25, 4-30, Roppongi 1-chome, Minato-ku, Tokyo 106-8508, Japan
Tel. (81) 3 5561 3000, FAX (81) 3 5561 4387
LATIN AMERICA: Lucent Technologies Inc., Room 416, 2333 Ponce de Leon Blvd., Coral Gables, FL 33134, USA
Tel. +1-305-569-4722, FAX +1-305-569-3820
EUROPE: Data Requests: DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148
Technical Inquiries:GERMANY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot),
FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (46) 8 594 607 00 (Stockholm), FINLAND: (358) 9 4354 2800 (Helsinki),
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