JFW050B1 - Tyco Electronics - Datasheet.Directory

Data Sheet

March 2000

JFW050B, JFW075B, JFW100B, JFW150B Po wer Modules:

dc-d c Converters; 36 to 75 Vdc Input, 12 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/o r dis tr i buted power architectu res

■Workstations

■Computer equi pm ent

■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 P o w er Modules are dc-dc conv erters

that operate ov er an input voltage range of 36 Vdc to

75 Vdc and provide a precisely regulated dc output.

The ou tput is fu lly is ola t ed f ro m t he in pu t, a ll o wi n g ve r -

satile polarity configurations and grounding connec-

tions. The modules have maximum power ratings from

50 W to 150 W at typical full-load efficiencies of 88%.

The sealed modules have metal baseplates for e xcel-

lent t he rmal per formanc e . Th rea de d- th rou gh ho les

are pr o vide d fo r easy mo un ti ng or ad di ng a he at s in k

for high-temperature applications. Listed above are

the enhanced features for convenience and flexibility

in redundant and/or distributed power 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 densit y

■High efficiency: 88% typical

■Low output noise

■Constant frequency

■Metal basep late

■2:1 input voltage range

■Anti-r ol lba ck circui t

■Overcurrent protection

■Current-limit set-point adjustment

■Pri ma ry and seconda ry remote on/off

■Remote sense

■Adjustable output voltage: 60% to 110% of VO, nom

■Output overvoltage protection

■Overvoltage set-point adjustment

■Synchronization

■Forced load sharing (parallelable)

■Parallelable with FW250B1, FW300B1

■Output current monitor

■Overtemperature protection

■Power good signal

■Thermal warning signal

■Case ground pin

■

ISO

* 9001 Certified manufacturing facilities

■

†1950

Recognized,

CSA

‡ C22.2 No. 950-95

Cert ified, 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

for Standardization.

†

is a registered trademark of Underwriters Laboratories, Inc.

‡

CSA

is a registered trademark of Canadian Standards Assn.

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 equip-

2Tyco Electronics Corp.

Data Sheet

March 2000dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150

JFW050B, JFW075B, JFW100B, JFW150B 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 achiev e maximum safety and system protection, alwa ys use an input line fuse. The

safety agencies require a normal-blo w 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:

JFW050B, JFW075B

JFW100B, JFW150B

Transient (100 ms; JFW100B, JFW150B only)

VI, trans

—

100

Vdc

I/O Isolation Voltage (for 1 minute) ——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 VI36 48 75 Vdc

Maximum Input Current

(VI = 0 V to 75 V; IO = IO, max; see Figures 1—4.):

JFW050B

JFW075B

JFW100B

JFW150B

II, max

—

2.2

3.4

4.6

6.8

Maximum Input Current

(VI = 36 V to 75 V; IO = IO, max; see Figures 1—4.):

JFW050B

JFW075B

JFW100B

JFW150B

II, max

—

1.7

2.6

3.5

5.2

Inru sh Transien t i2t——1.0 A2s

Input Reflected-ripple Current, P e ak-to-peak

(5 Hz to 20 MHz, 12 µH source impedance;

see Figure 17.)

II—5—mAp-p

Input Ripple Rejection (120 Hz) ——60 —dB

Tyco Electronics Corp. 3

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Electrical Specifications (continued)

Table 2. Output Specifications

* Consult your sales representative or the f actory.

† These are manufacturing test limits. In some situations, results may differ .

Table 3. Isolation Specifications

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point

(VI = 48 V; IO = IO, max; TC = 25 °C) All VO, set 11.78 12.0 12.22 Vdc

Output Voltage (Over all operating input voltage,

resistiv e load, and temperature conditions until

end of life; see Figure 19.)

All VO11.64 —12.36 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

—

0.01

0.05

0.2

0.4

150

%VO

Output Ripp le and Noise Voltage (See

Figure 18.):

RMS

Peak-to-peak (5 Hz to 20 MHz)

All

All —

——

—50

200 mVrms

mVp-p

External Load Capacitance All —0—*µF

Output Current

(At IO < IO, m in, the module may exceed output

ripple specifications.)

JFW050B

JFW075B

JFW100B

JFW150B

0.5

—

4.2

6.3

8.3

12.5

Output Current-limit Inception

(untrimmed; VO = 90% of VO, nom)JFW050B

JFW075B

JFW100B

JFW150B

IO , cli

—

4.8

7.2

9.6

14.4

5.8†

8.8†

10.8†

16.3†

Output Short-circuit Current (VO = 250 mV) All ——170 —%IO, m ax

Efficiency

(VI = 48 V ; IO = IO, max; TC = 70 °C;

see Figu res 9—12 and 19.)

JFW050B

JFW075B

JFW100B

JFW150B

—

Switching frequency All ——500 —kHz

Dynamic Response

(ýIO/ýt = 1 A/1 µs, VI = 48 V, TC = 25 °C; tested

without any capacitance across the load; see

Figures 14 and 15.):

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

—

300

—

%VO, set

µs

%VO, set

µs

Parameter Min Typ Max Unit

Isolation Capacitance —2500 —pF

Isolation Resistance 10 ——M¾

4Tyco Electronics Corp.

Data Sheet

March 2000dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150

JFW050B, JFW075B, JFW100B, JFW150B 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(–) termi nal ; see Figure 20 and

Feature Descriptions.):

JFWxxxB1 Preferred Logic:

Both Primary and Secondary Ref erenced Remote

On/Off:

Logic Low—Module On

Logic High—Module Off

JFWxxxB 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 = 15 V

Tur n- on Time

(IO = 80% of IO, max; VO within ±1% of steady state; see

Figure 16.)

Von/off

Ion/off

Von/off

Ion/off

—

1.2

1.0

µA

Output Voltage Adjustment (See Feature Descriptions.):

Output Voltage Remote-sense Range

Output Voltage Set-point Adjustment (trim) Range —

——

60 —

—1.2

110 V

%VO, nom

Output Overvoltage Protection —13.2* —16.0* V

Overvoltage Set-Point Adjustment Range —50 —100 %VO, clam p, nom

Synchronization:

Clock Amplitude

Clock Pulse Width

Fan-out

Capture Frequency Range

—

4.00

0.4

—

425

—

5.00

—

575

µs

—

kHz

Forced Load Share Accuracy ——10 —%IO, rated

* These are manufacturing test limits. In som e situations, results may differ.

Tyco Electronics Corp. 5

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Feature Specifications (continued)

Table 4. Fe ature Specifications (continued)

Solder, Cleaning, and Drying Considerations

P ost 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, ref er to

the

Board-Mounted Power Modules Soldering and Cleaning

Application Note (AP97-021EPS).

Parameter Symbol Min Typ Max Unit

Output Current Monitor (IO = IO, max, TC = 70 °C):

JFW050B

JFW075B

JFW100B

JFW150B

IO, mon

0.90*

0.60*

0.45*

0.30*

1.07

0.71

0.54

0.37

1.20*

0.8*

0.60*

0.40*

V/A

Overtemperature Protection (shutdown) (See Figure 27.) TC—105 —°C

Power Good Signal

(Open collector output: low level indicates power good.):

Output Sink Current (VO ð 1.5 V)

Maximum Voltage

High-state Internal Impedance to Ground

—

200

—

k¾

Thermal Warning Signal

(Open collector output; low level indicates overtemperature

shutdown is immi nent .) :

Output Sink Current (VO ð 1.5 V)

Maximum Voltage

High-state Internal Impedance to Ground

—

200

—

k¾

Current- Lim it Set -Poin t Thres ho ld Adj ustme nt Range —10 —100 %IO, cli, nom

Overcurrent Protection Delay (optional) ——4—s

Data Sheet

March 2000

66 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Characteristic Curves

The following figures provide typical characteristics for the power modules. The figures are applicable to both on/off

configurations.

8-2328 (C)

Figure 1. T y pical JFW050B Input Characteristics at

Room Temperature

8-2329 (C)

Figure 2. T y pical JFW075B Input Characteristics at

Room Temperature

8-2330 (C)

Figure 3. T y pical JFW100B Input Characteristics at

Room Temperature

8-2331 (C)

Figure 4. T y pical JFW150B Input Characteristics at

Room Temperature

10 20 30 5040 60

0.0

1.2

INPUT V OLTAGE, VI (V)

0.8

0.6

1.0

1.6

800

1.4

0.4

0.2

1.8

INPUT CURRENT, II

(A)

IO = 4.1A

IO = 2.1 A

IO = 0.4 A

10 20 30 40 50

0.0

1.5

INPUT V OLTAGE, VI (V)

1.0

2.0

800

0.5

60 70

2.5

3.0

IO = 6.25 A

IO = 3.12 A

IO = 0.625 A

INPUT CURRENT, II (A)

1.0

0.0

2.0

3.0

3.5

0.5

1.5

2.5

10 20 30 7040 800

INPUT CURRENT, II (A)

6050

INPUT V OLTAGE, VI (V)

IO = 8.3 A

IO = 4.1 A

IO = 0.8 A

INPUT CURRENT, II

(A)

10 20 30 40 50

INPUT V OLTAGE, VI (V)

800

60 70

IO = 12.5 A

IO = 6.3 A

IO = 1.3 A

Tyco Electronics Corp. 7

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Characteristic Curves (continued)

8-3081 (F)

Figure 5. Typical JFW050B Output Characteristics

at Room Temperature

8-3082 (F)

Figure 6. Typical JFW075B Output Characteristics

at Room Temperature

8-3083 (F)

Figure 7. Typical JFW100B Output Characteristics

at Room Temperature

8-3084 (F)

Figure 8. Typical JFW150B Output Characteristics

at Room Temperature

001234567

OUTPUT CURRENT, IO (A)

OUTPU T VOLTAGE, VO (V)

VI = 75 V

VI = 48 V

VI = 36 V

00123456789

OUTPUT CURRENT, IO (A)

OUTPU T VOLT AG E, VO(V)

VI = 48 V

VI = 75 V

VI = 36 V

0024681012

OUTPUT CURRENT, IO (A)

OUTPUT VOLTAGGE, VO (V)

VI = 48 V

VI = 75 V

VI = 36 V

006 812141618

OUTPUT CURRENT, IO (A)

OUTPUT VOLTAGGE, VO (V)

VI = 48 V

VI = 75 V

VI = 36 V

Data Sheet

March 2000

88 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Characteristic Curves (continued)

8-2546 (C)

Figure 9. Typical JFW050B Converter Efficiency

vs. Output Current at Room Temperature

8-2547 (C)

Figure 10. Typical JFW075B Converter Efficiency

vs. Output Current a t Room Temperature

8-2548 (C)

Figure 11. Typical JFW100B Converter Efficiency

vs. Output Current at Room T emperature

8-2549 (C)

Figure 12. Typical JFW150B Converter Efficiency

vs. Output Current at Room T emperature

EFFICIENCY, η(%)

1.0 1.5 2.0 2.5 3.0

OUTPUT CURRENT, IO (A)

4.50.5

3.5 4.0

VI = 36 V

VI = 54 V

VI = 75 V

1.625 2.625 3.625 5.6254.625 6.625

OUTPUT CURRENT, IO (A)

0.625

EFFICIENCY, η (%)

VI = 36 V

VI = 48 V

VI = 75 V

1.83 2.83 3.83 5.834.83 6.83

7.83

8.83

EFFICIENCY, η (%)

0.83

OUTPUT CURRENT, I

(A)

= 36 V

= 54 V

= 75 V

2 54 7 8 10

911

OUTPUT CURRENT, I

(A)

131

EFFICIENCY, η (%)

3 6

= 36 V

= 54 V

= 75 V

Tyco Electronics Corp. 9

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Characteristic Curves (continued)

8-2340 (C)

Note: See Figure 18 for test conditions.

Figure 13. Typical JFW150B Output Ripple Voltage

at Room Temperature, 36 Vdc to 75 V

Input, and 30 A Output

8-2341 (C)

Note: Te sted with a 10 µF aluminum and a 1.0 µF ceramic capacitor

across the load.

Figu re 14. Typical JF W15 0B Trans ien t Re spo nse 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.)

8-2342 (C)

Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor

across the load.

Figure 15. Typical JFW150B Transient Response to

Step Increase in Load from 50% to 75%

of Full Load at Room Temperature and

54 V Inpu t (Waveform Averaged to

Eliminate Ripple Component.)

8-2343 (C)

Note: Tested with a 10 µF aluminum and a 1.0 µF ceramic capacitor

across the load.

Figure 16. Typical Start-Up fr om Remote On/Off

JFW150B1; IO = IO, max

TIME, t (500 ns/div)

OUTPUT VOLTAGE, VO (V)

(20 mV/div)

VI = 75 V

VI = 36 V

VI = 48 V

TIME, t (100 µs/div)

OUTPUT VOLTAGE, VO (V)

(200 mV/div)

SLEW RATE

1A/1µs

OUTPUT CURRENT, IO (A)

(2 A/div)

6.25 A

TIME, t (100 µs/div)

SLEW RATE

1A/1µs

OUTPUT VOLTAGE, VO (V)

(200 mV/div)

OUTPUT CURRENT, IO (A)

(2 A/div)

6.25 A

9.375 A

TIME, t (5 ms/div)

OUTPUT VOLTAGE, VO (V)

(5 V/div) REMOTE ON/OFF

VOLTAGE, VON/OFF (V)

NO CAP

CO = 330 µf

CO = 1930 µf

CO = 4630 µf

CO = 9480 µf

Data Sheet

March 2000

1010 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B 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 . Posit ion 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

socket ing, place Kelvin connec tions at module ter m inals to

avoid measu rement 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 ¾ 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

requir eme nts of the end-u se sa fety agency stan dard,

i.e.,

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), for the module’s output to be considered

meeting 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 voltages, including the

ac mains.

■One VI pin and one VO 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 e xtra-low voltage (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

CS 220 µF

ESR < 0.1 Ω

@ 20 ˚C, 100 kHz

VI(+)

VI(–)

BATTERY 33 µF

CURRENT

PROBE

LTEST

ESR < 0.7 Ω

@ 100 kHz

VO(+)

VO(–)

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–

()()[]

VI+

()

–VI–

()()[]

-------------------------------------------------------





x 100 %=

Tyco Electronics Corp. 11

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Feature Descriptions

Overcurrent Protection

To provide protection in a fault (output ov erload) condi-

tion, the unit is equipped with internal current-limiting

circuitry and optional delayed shutdown. 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:

Rcl-adj is the value of an external resistor between the

OCTRIM pin and SENSE(–) pin.

Irated is the output current rating of the module

(not the current-limit inception).

Itrim 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 deliv er output power. 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 e xclu-

sively for control.

Primary Remote On/Off

The primary remo te on/off signal ( ON/OFF) is available

with either positive or negative logic. Positive logic

turns the module on during a logic high 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 a nd off , the user m ust sup-

ply a switch to control the voltage between the primary

remote on/off terminal (Von/off, pri) and the VI(–) terminal.

The switch can be an open collector or equivalent (see

Figure 20). A logic low is Von/off, pri = 0 V to 1.2 V. The

maximum Ion/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 allowable

leakage current of the switch at Von/off, pri = 15 V is 50

µA.

If not using the primary remote on/off feature, do one of

the following:

■For negative logi c, short the ON/ OFF pin t o VI(–).

■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 a v ailab l e with nega tiv e log ic. The n egati v e logic sig-

nal turns the module off during a logi c high and on dur -

ing a logi c low. To turn the pow er mod ule on and off, the

user must supply a switch to control the voltage between

the S-ON/OFF pin and the SENSE(–) pin (Von/off, sec).

The switch can be an open collector or equivalent (see

Figure 20). A logic low is Von/off, sec = 0 V to 1.2 V. The

maximum Ion/o ff, sec during a logic low is 1 mA. The

switch should maintain a log ic- lo w voltage while sinkin g

1 mA.

During a log ic hi gh, th e max im um Von/off, sec generated

by the power mod ul e is 15 V. The maximum allo wa ble

leakage curren t of th e switch at Von/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

–

-----------------------------------------------------





kΩ=

SENSE(–)

VI(+)

ON/OFF

(PRIMARY)

VI(–)

(SECONDARY)

S-ON/OFF

–

Ion/off, sec

Von/off, sec

–

Ion/off, pri

Von/off, pri

Data Sheet

March 2000

1212 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B 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.:

[VO(+) – VO(–)] – [SENSE(+) – SENSE(–)] ð 1.2 V

The voltage between the VO( +) 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 Forced Load Sharing (Parallel Operation)

section.

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 v oltage 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 Circu it Configuration for

Single-Module Remote-Sense Operation

Output Voltage Set-Point Ad justme nt

(Trim)

Output voltage trim (VOTRIM 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 VOTRIM pin and either the

SENSE(+) or SENSE(–) pins. The trim resistor should

be position ed cl os e to the module.

If not using the trim feature, leave the VOTRIM pin

open.

With an external resistor between the VOTRIM and

SENSE(–) pins (Radj-down), the output voltage set point

(VO, adj) decreases (see Figure 22).

8-748 (C).e

Figure 22. Circuit Configuration to Decrease

Output Voltage

The following equation determines the required exter-

nal-resistor value to obtain a percentage output voltage

change of ý%.

The test results for this configuration are displayed in

Figure 23. This figure applies to all output voltages.

VO(+)

SENSE(+)

SENSE(–)

VO(–)

VI(+)

VI(-)

IOLOAD

CONTACT AND

DISTRIBUTION LOSSES

SUPPLY II

CONTACT

RESISTANCE

VI(+)

VI(–)

ON/OFF

CASE

VO(+)

VO(–)

SENSE(+)

VOTRIM

SENSE(–)Radj-down

RLOAD

Radj-down 100

∆%

----------2

–





kΩ

Tyco Electronics Corp. 13

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Feature Descriptions (continued)

Output Voltage Set-Point Adjustment

(Trim) (continued)

8-879 (C)

Figure 23. Resistor Selection for Decreased

Output Voltage

With an external resistor connected between the

VOTRIM and SENSE(+) pins (Radj-up), the output volt-

age set point (VO, adj) increases (see Figure 24).

8-715 (C).g

Figure 24. Circuit Configuration to Increase

Output Voltage

The following equation determines the required exter-

nal-resistor value to obtain a percentage output voltage

change of ý%.

The test results for this configuration are displayed in

Figure 25.

The voltage between the VO(+) and VO(–) ter mi nal s

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 adjustme nt (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 li mit ati on.

The amount of power deliv ered by the module is

defined as the v oltage 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.

8-2083 (C)

Figure 25. Resistor Selection for Increased Output

Voltage

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.

010203040

100

100k

% 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∆%

()

∆%

----------------------------------

–





kΩ

246

10k

100k

% CHANGE IN OUTPUT VOLTAGE (∆%)

ADJUSTMENT RESIST OR V ALUE (Ω)

10M

100

Data Sheet

March 2000

1414 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Feature Descriptions (continued)

Output Overvoltage Protection (continued)

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 by

placing a resistor between the overvoltage trim

(O VTRIM) pin and SENSE(–) pin. This feature is useful

if the output v oltage of the conv erter has been trimmed

down and a corresponding reduction in ov erv oltage trip

point is desired.

The resistance required from a given overvoltage nom-

inal set point is derived from the following equation:

Where:

Rov-adj is the value of an external resistor between the

OVTRIM pin and SENSE(–) pin.

Vov-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 clock 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.

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 VI(–) pins of the modules must be

shorted together.

Unused SYNC IN pins should be tied to VI(–). 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 VI(–)

pin. The frequency of this signal will equal either the

module’s internal cloc k 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 voltage applied to the

load. For additional power requirements, where multi-

ple 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.

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 pr oximity and direc tne ss are necess ary

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.

Rov-adj 14.7 2 Vov-set

–

Vov-set 14.7

–

----------------------------------------





kΩ

Tyco Electronics Corp. 15

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Feature Descriptions (continued)

Forced Load Sharing (Parallel Operation)

(continued)

8-581 (C).c

Figure 26. Wiring Configuration for Redundant

Parallel Operation

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 4.5 V at rated output current. For

paralleling with Fx300x modules, consult the f actory for

the V/A ratio. The output impedance of this pin is

approximately 20 k¾, so customer detection circuitry

must have a high- impe dan ce 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 delivered. Howe ver , 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.

Thermal Considerations

Introduction

The JFW-Series power modules operate 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

(TC) occurs at the position indicated in Figure 27.

(–)

PARALLEL

SENSE(+)

SENSE(–)

(+)

CASE

(+)

ON/OFF

(–)

PARALLEL

SENSE(+)

SENSE(–)

(+)

CASE

(+)

ON/OFF

(–)

Data Sheet

March 2000

1616 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Thermal Considerations (continued)

Introduction (continued)

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 f or 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 v alue for extremely high reliability.

F or ad dit ional information r egar ding thi s mo dule , re f er t o

the

Thermal Manage ment JC- , JFC-, JW-, and JFW-

Series 50 W to 150 W Board-Mounted Power Modules

Technica l 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

ex ceeding 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 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 f ollowing example.

Example

What is the minimum airflow necessary for a JFW150B

operating at VI = 54 V, an output current of 10 A, and a

maximum ambient temperature of 40 °C?

Solution

Given: VI = 54 V

IO = 10 A

TA = 40 °C

Determine PD (Use Figure 32.):

PD = 17 W

Determine airflo w (v) (Use Figure 28.):

v = 2.0 m/s (400 ft./min.)

8-1150 (C).a

Figure 28. Forced Convection Power Derating with

No Heat Sink; Either Orientation

8-2550 (C)

Figure 29. JFW050B Power Dissipation vs.

Output Current at 25 °C

7.6 (0.30)

38.0 (1.50) MEASURE CASE

TEMPERATURE HERE

010203040 100

LOCAL AMBIENT TEMPERATURE, T

A (˚C)

POWER DISSIPATION, PD (W)

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.)

1.0 1.5 2.0 3.02.5 3.5

OUTPUT CURRENT, IO (A)

4.0

4.50.5

POWER DISSIPATION, PD (W)

VI = 75 V

VI = 54 V

VI = 36 V

Tyco Electronics Corp. 17

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Thermal Considerations (continued)

Heat Transfer Without Heat Sinks (continued)

8-2551 (C)

Figure 30. JFW075B Power Dissipation vs.

Output Current at 25 °C

8-2552 (C)

Figure 31. JFW100B Power Dissipation vs.

Output Current at 25 °C

8-2553 (C)

Figure 32. JFW150B Power Dissipation vs.

Output Current at 25 °C

Heat Transfer with Heat Sin ks

The power module has 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.). F or a screw attachment

from the pin side, the recommended hole si ze on the

customer’s PWB around the mounting holes is

0.130 ± 0.005 inches. If a larger hole is used, the

mounting tor que from the pin side must not exceed

0.25 N-m (2.2 in.-lb.).

Thermal derating with heat sinks is e xpressed by using

the overall thermal resistance of the module. Total

module thermal resistance (θca) is defined as the max-

imum case temperature rise (∆TC, max) divided by the

module power dissipation (PD):

The location to measure case temperature (TC) 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

experimental 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.

2.625 3.625 4625 5.625 6.6250.625

OUTPUT CURRENT, IO(A)

POWER DISSIPATION, PD (W)

1.625

VI = 75 V

VI = 48 V

VI = 36 V

1.833 2.833 3.833 5.8334.833 6.833

OUTPUT CURRENT, IO (A)

7.833 8.8330.833

POWER DISSIPATION, PD (W)

VI = 75 V

VI = 54 V

VI = 36 V

53 6428

910

OUTPUT CURRENT, IO (A)

131

11 12

VI = 75 V

VI = 54 V

POWER DISSIPATION, PD (W)

VI = 36 V

θca ∆TCmax,

---------------------TCTA

–

()

------------------------

Data Sheet

March 2000

1818 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Thermal Considerations (continued)

Heat Transfer with Heat Sinks (continued)

8-1153 (C).a

Figure 33. Case-to-Ambient Thermal Resistance

Curves; Eit her Orientation

Example

If an 85 °C case temperature is desired, what is the

minimum airflow necessary? Assume the JFW150B

module is operating at VI = 54 V and an output current

of 10 A, maximum ambient air temperature of 40 °C,

and heat sink of 0.5 in.

Solution

Given: VI = 54 V

IO = 10 A

TA = 40 °C

TC = 85 °C

Heat sink = 0.5 inch.

Determine PD by using Figure 32:

PD = 17 W

Then solve the following equation:

Use Figure 33 to determine air velocity for the 0.5 inch

heat sink. The minimum airflow necessary for this

module is about 1.25 m/s (250 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) 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 pro-

vides a conservative estimate for such instances.

EMC Considerations

For assistance with designing f or 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).

0 0.5

(100) 1.0

(200) 1.5

(300) 2.0

(400) 2.5

(500) 3.0

(600)

AIR VELOCITY, IN m/s (ft./min.)

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, θCA

(˚C/W)

θca TCTA

–

()

------------------------

θca 85 40–

()

------------------------

θca 2.6 °C/W=

PDTCTSTA

θcs θsa

∅

θsa TCTA

–

()

-------------------------θcs

–=

Tyco Electronics Corp. 19

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

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

8-1397 (C).b

* Side label includes Tyco name, product designation, safety agency markings, input/output voltage 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

5.3 (0.21)

MIN

0.64 (0.025) SQUARE

SOLDER-PLATED

BRONZE, 10 PLACE

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)

10.16 (0.400)

12.7 (0.50)

50.8

(2.00)

MOUNTING INSERTS

M3 x 0.5 THROUGH,

4 PLACES

35.56

(1.400)

20 Tyco Electronics Corp.

Data Sheet

March 2000dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Recommended Hole Patter n

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)

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)

50.8

(2.00)

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(+)

Tyco Electronics Corp. 21

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Ordering Information

Table 5. Device Codes

Optional features can be ordered using the suffixes shown in Table 6. The suffixes f ollow the last letter of the device

code and are placed in descending order. F or example, the de vice codes f or a JFW150B module with the follo wing

options are shown below:

Table 6. Device Options

Input

Voltage Output

Power Remote

On/Off Logic Device

Code Comcode

48 V 12.0 V 50 W Negative JFW050B1 108161787

48 V 12.0 V 75 W Negative JFW075B1 108299033

48 V 12.0 V 100 W Negative JFW100B1 108243205

48 V 12.0 V 150 W Negative JFW150B1 108161746

48 V 12.0 V 50 W Positive JFW050B TBD

48 V 12.0 V 75 W Positive JFW075B TBD

48 V 12.0 V 100 W Positive JFW100B TBD

48 V 12.0 V 150 W Positive JFW150B TBD

Positive logic JFW150B

Negative logic JFW150B1

Negative logic and delayed current-limit shutdown JFW150B31

Option Suffix

Delayed curren t-li mit shutdown 3

Negative remote on/off logic 1

Positive remote on/off log ic —

Data Sheet

March 2000

2222 Tyco Electronics Corp.

dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150 W

JFW050B, JFW075B, JFW100B, JFW150B 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 1/2 in. longitudi nal kit (heat si nk, thermal pad, and screws) 407244755

57.9 (2.28)

(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)

Tyco Electronics Corp. 23

Data Sheet

March 2000 JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

dc-dc Converters; 36 Vdc to 75 Input, Vdc 12 Vdc Output; 50 W to 150 W

Notes

Data Sheet

Mar 6, 2001dc-dc Converters; 36 to 75 Vdc Input, 12 Vdc Output; 50 W to 150

JFW050B, JFW075B, JFW100B, JFW150B Power Modules:

Printed on

Recycled Paper

Tyco Electroni cs Power Syst ems, Inc.

3000 Skyline Drive, Mesquite, TX 75149, USA

+1-800-526-7819 FA X : +1-888-315-5182

(Outs ide U.S.A.: +1-972-284-2626, FAX: +1-972-284-2900)

http://power.tycoelectronics.com

Tyco Electronics Corporation 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.

Printed in U.S.A.

March 2000

DS98-381EPS (Replaces DS98-044EP S)