JW075A_技术文档

Data Sheet

July 1999

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

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

■ Industry-standard pinout

■ Metal baseplate

■ 2:1 input voltage range

The JW050A, JW075A, JW100A, and JW150A Power Modules

use advanced, surface-mount technology and deliver high-

quality, efﬁcient, and compact dc-dc conversion.

■ Overtemperature protection (100 W and 150 W only)

■ Overcurrent and overvoltage protection

■ Remote sense

■ Remote on/off

Applications

■ Adjustable output voltage: 60% to 110% of V^{O, nom}

■ Case ground pin

■ Distributed power architectures

■ Workstations

■ ISO9001 Certiﬁed manufacturing facilities

■ UL* 1950 Recognized, CSA^†C22.2 No. 950-95

Certiﬁed, and VDE 0805 (EN60950, IEC950)

Licensed

■ Computer equipment

■ Communications equipment

■ CE mark meets 73/23/EEC and 93/68/EEC

directives^‡

Options

* 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.)

■ Heat sinks available for extended operation

■ Choice of remote on/off logic conﬁguration

Description

The JW050A, JW075A, JW100A, and JW150A Power Modules are dc-dc converters that operate over an input

voltage range of 36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated

from the inputs, allowing versatile polarity conﬁgurations and grounding connections. The modules have maxi-

mum power ratings from 50 W to 150 W at a typical full-load efﬁciency of 84%.

The sealed modules offer a metal baseplate for excellent thermal performance. Threaded-through holes are pro-

vided to allow easy mounting or addition of a heat sink for high-temperature applications.The standard feature set

includes remote sensing, output trim, and remote on/off for convenient ﬂexibility in distributed power applications.

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

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.

Parameter

Symbol

Min

Max

Unit

Input Voltage:

Continuous:

JW050A, JW075A

JW100A, JW150A

Transient (100 ms; JW100A, JW150A only)

V^I

V^{I, trans}

—

75

80

100

Vdc

V

I/O Isolation Voltage (for 1 minute)

—

1500

100

Vdc

°C

Operating Case Temperature

T^C

–40

(See Thermal Considerations section.)

Storage Temperature

T^stg

–55

125

°C

Electrical Speciﬁcations

Unless otherwise indicated, speciﬁcations apply over all operating input voltage, resistive load, and temperature

conditions.

Table 1. Input Speciﬁcations

Parameter

Operating Input Voltage

Symbol

Min

Typ

Max

Unit

V^I

36

48

75

Vdc

Maximum Input Current

(VI = 0 V to 75 V; IO = IO, max):

JW050A (See Figure 1.)

JW075A (See Figure 2.)

JW100A (See Figure 3.)

JW150A (See Figure 4.)

I^{I, max}

—

1.7

2.6

3.5

5.2

A

Inrush Transient

i²t

—

5

1.0

—

A²s

Input Reﬂected-ripple Current, Peak-to-peak

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

see Figure 17.)

I^I

mAp-p

Input Ripple Rejection (120 Hz)

—

60

—

dB

Fusing Considerations

CAUTION:This power module is not internally fused. An input line fuse must always be used.

This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone

operation to an integrated part of a sophisticated power architecture. To preserve maximum ﬂexibility, internal fus-

ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The

safety agencies require a normal-blow fuse with a maximum rating of 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.

2

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Electrical Speciﬁcations (continued)

Table 2. Output Speciﬁcations

Parameter

Device

Symbol

Min

Typ

Max

Unit

Output Voltage Set Point

All

VO, set

4.92

5.0

5.08

Vdc

(V^I= 48 V; I^O= I^{O, max}; T^C= 25 °C)

Output Voltage

All

V^O

4.85

—

5.15

Vdc

(Over all operating input voltage, resistive load,

and temperature conditions until end of life.

See Figure 19.)

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

—

0.01

0.05

15

0.1

0.2

50

%V^O

mV

Output Ripple and Noise Voltage

(See Figure 18.):

RMS

All

—

40

150

mVrms

mVp-p

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

External Load Capacitance

All

—

0

—

*

µF

Output Current

(At I^O< I^{O, min}, the modules may exceed output

ripple speciﬁcations.)

JW050A

JW075A

JW100A

JW150A

I^O

IO

0.5

—

10

15

20

30

A

Output Current-limit Inception

(V^O= 90% of V^{O, nom})

JW050A

JW075A

JW100A

JW150A

I^{O, cli}

—

12.0

18.0

23.0

34.5

14^†

21^†

26^†

39^†

A

Output Short-circuit Current (V^O= 250 mV)

Efﬁciency (V^I= 48 V; I^O= I^{O, max}; T^C= 70 °C)

All

—

170

—

%I^{O, max}

JW050A

JW075A

JW100A

JW150A

η

—

84

—

%

Switching Frequency

All

—

500

—

kHz

Dynamic Response

(∆I^O/∆t = 1 A/10 µs, V^I= 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

All

—

2

300

—

%V^{O, set}

µs

All

—

2

300

—

%V^{O, set}

µs

Settling Time (V^O< 10% of peak deviation)

* Consult your sales representative or the factory.

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

Tyco Electronics Corp

3

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Electrical Speciﬁcations (continued)

Table 3. Isolation Speciﬁcations

Parameter

Min

—

Typ

2500

—

Max

—

Unit

pF

Isolation Capacitance

Isolation Resistance

10

—

MΩ

General Speciﬁcations

Parameter

Min

Typ

2,600,000

—

Max

Unit

hr.

Calculated MTBF (I^O= 80% of I^{O, max}; T^C= 40 °C)

Weight

—

100 (3.5)

g (oz.)

Feature Speciﬁcations

Unless otherwise indicated, speciﬁcations apply over all operating input voltage, resistive load, and temperature

conditions. See Feature Descriptions for additional information.

Parameter

Remote On/Off Signal Interface

Symbol

Min

Typ

Max

Unit

(V^I= 0 V to 75 V; open collector or equivalent compatible;

signal referenced to V^I(–) terminal; see Figure 20 and

Feature Descriptions.):

JWxxxA1 Preferred Logic:

Logic Low—Module On

Logic High—Module Off

JWxxxA Optional Logic:

Logic Low—Module Off

Logic High—Module On Logic Low:

At I^on/off= 1.0 mA

V^on/off

I^on/off

0

—

1.2

1.0

V

mA

At V^on/off= 0.0 V

Logic High:

At Ion/off = 0.0 µA

Leakage Current

Turn-on Time (See Figure 16.)

(I^O= 80% of I^{O, max}; V^Owithin ±1% of steady state)

Von/off

I^on/off

—

20

15

50

35

V

µA

ms

Output Voltage Adjustment (See Feature Descriptions.):

Output Voltage Remote-sense Range

—

60

—

0.5

110

V

Output Voltage Set-point Adjustment Range (trim)

%V^{O, nom}

Output Overvoltage Protection

V^{O, clamp}

5.9*

—

7.0*

—

V

Overtemperature Protection (shutdown)

TC

105

°C

(100 W and 150 W only; see Feature Descriptions.)

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

4

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Characteristic Curves

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

conﬁgurations.

2.0

1.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.0

1.0

0.5

0.0

0

4

8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 6872

INPUT VOLTAGE, V (V)

0

4

8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72

INPUT VOLTAGE, V (V)

I

8-1159 (C)

8-1160 (C)

Figure 1. Typical JW050A Input Characteristics at

Room Temperature

Figure 3. Typical JW100A Input Characteristics at

Room Temperature

3.0

2.5

6

5

2.0

1.5

1.0

0.5

0.0

4

3

2

1

0

10

20

30

40

50

60

70

80

0

10

20

30

40

50

60

70

80

INPUT VOLTAGE, V

I

(V)

INPUT VOLTAGE, V

I

(V)

8-1131 (C)

8-1137 (C)

Figure 2. Typical JW075A Input Characteristics at

Room Temperature

Figure 4. Typical JW150A Input Characteristics at

Room Temperature

Tyco Electronics Corp

5

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Characteristic Curves (continued)

6

5

6

5

4

3

2

4

3

2

1

0

1

0

2

4

6

8

10 12 14 16 18 20 22 24 26

0

1

2

3

4

5

6

7

8

9

10 11 12

OUTPUT CURRENT, IO (A)

8-1167 (C)

8-1165 (C)

Figure 7. Typical JW100A Output Characteristics

at Room Temperature

Figure 5. Typical JW050A Output Characteristics

at Room Temperature

6

5

6

5

4

3

2

1

0

4

3

2

1

0

1

2

3

4

5

6

7

8

9 10 11 12 13 14 15 16 1718

0

5

10

15

20

25

30

35

40

OUTPUT CURRENT, I (A)

O

OUTPUT CURRENT, IO (A)

8-1140 (C)

8-1134 (C)

Figure 8. Typical JW150A Output Characteristics

at Room Temperature

Figure 6. Typical JW075A Output Characteristics

at Room Temperature

6

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Characteristic Curves (continued)

85

84

86

85

V

I

= 36 V

= 54 V

= 72 V

84

83

82

81

80

79

78

V

83

V

I

= 36 V

= 54 V

= 72 V

V

I

82

81

80

79

78

VI

77

76

77

76

0

1

2

3

4

5

6

7

8

9

10

0

2

4

6

8

10

12

14

16

18 20

OUTPUT CURRENT, I

O

(A)

OUTPUT CURRENT, I

O

(A)

8-1161 (C)

8-1163 (C)

Figure 9. Typical JW050A Converter Efﬁciency vs.

Output Current at Room Temperature

Figure 11. Typical JW100A Converter Efﬁciency vs.

Output Current at Room Temperature

88

86

87

86

85

84

83

82

81

80

79

78

77

76

75

74

73

84

82

80

VI

= 36 V

= 54 V

= 72 V

V

I

= 36 V

= 54 V

= 72 V

78

76

74

72

70

0

1

2

3

4

5

6

7

8

9

10 11 12 13 14 15

O (A)

0

5

10

15

20

(A)

25

30

OUTPUT CURRENT, I

O

8-1132 (C)

8-1138 (C)

Figure 10. Typical JW075A Converter Efﬁciency vs.

Output Current at Room Temperature

Figure 12. Typical JW150A Converter Efﬁciency vs.

Output Current at Room Temperature

Tyco Electronics Corp

7

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Characteristic Curves (continued)

TIME, t (100 µs/div)

8-2058 (C)

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

across the load.

TIME, t (1 µs/div)

8-2014 (C)

Figure 15. Typical JW150A Transient Response to

Step Increase in Load from 50% to 75%

of Full Load at Room Temperature and

48 V Input (Waveform Averaged to

Figure 13. Typical JW150A Output RippleVoltage at

Room Temperature, 48 V Input, I^O= Full

Load

Eliminate Ripple Component.)

0

TIME, t (100 µs/div)

0

8-2057 (C)

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

across the load.

TIME, t (2 ms/div)

8-1143 (C).b

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

across the load.

Figure 14. Typical JW150A Transient Response to

Step Decrease in Load from 50% to 25%

of Full Load at Room Temperature and

48 V Input (Waveform Averaged to

Figure 16. Typical Start-Up from Remote On/Off

JW150A1; IO = IO, max

Eliminate Ripple Component.)

8

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Test Conﬁgurations

SENSE(+)

CONTACT AND

DISTRIBUTION LOSSES

TO OSCILLOSCOPE

V

I

(+)

(–)

VO(+)

CURRENT

PROBE

I

O

I

L

TEST

LOAD

SUPPLY

VI(+)

12 µH

V

I

VO(–)

CS 220 µF

CONTACT

RESISTANCE

ESR < 0.1 Ω

@ 20 °C, 100 kHz

33 µF

ESR < 0.7 Ω

@ 100 kHz

BATTERY

SENSE(–)

8-749 (C)

VI(–)

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.

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.

[V^O(+) – V^O(–)]I^O

[V^I(+) – V^I(–)]I^I

η =

x 100

%

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

Figure 17. Input Reﬂected-Ripple Test Setup

Figure 19. Output Voltage and Efﬁciency

Measurement Test Setup

COPPER STRIP

Design Considerations

Input Source Impedance

V

O

(+)

(–)

RESISTIVE

LOAD

1.0 µF

10 µF

SCOPE

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.

8-513 (C).d

Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or tan-

talum capacitor. Scope measurement should be made using a

BNC socket. Position the load between 51 mm and 76 mm

(2 in. and 3 in.) from the module.

Figure 18. Peak-to-Peak Output Noise

Measurement Test Setup

Tyco Electronics Corp

9

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Remote On/Off

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., UL1950, CSA C22.2 No. 950-95, and VDE 0805

(EN60950, IEC950).

Two remote on/off options are available. Positive logic

remote on/off turns the module on during a logic-high

voltage on the ON/OFF pin, and off during a logic low.

Negative logic remote on/off turns the module off dur-

ing a logic high and on during a logic low. Negative

logic (code sufﬁx “1”) is the factory-preferred conﬁgura-

tion.

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 meet-

ing the requirements of safety extra-low voltage

(SELV), all of the following must be true:

To turn the power module on and off, the user must

supply a switch to control the voltage between the

on/off terminal and the V^I(–) terminal (V^on/off). The

switch can be an open collector or equivalent (see

Figure 20). A logic low is V^on/off= 0 V to 1.2 V. The

maximum I^on/offduring a logic low is 1 mA. The switch

should maintain a logic-low voltage while sinking 1 mA.

■ The input source is to be provided with reinforced

insulation from any hazardous voltages, including the

ac mains.

During a logic high, the maximum V^on/offgenerated by

the power module is 15 V. The maximum allowable

leakage current of the switch at Von/off = 15 V is 50 µA.

■ One V^Ipin and one V^Opin 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.

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

following:

■ Another SELV reliability test is conducted on the

whole system, as required by the safety agencies, on

the combination of supply source and the subject

module to verify that under a single fault, hazardous

voltages do not appear at the module’s output.

■ For negative logic, short ON/OFF pin to V^I(–).

■ For positive logic, leave ON/OFF pin open.

Ion/off

ON/OFF

+

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.

Von/off

SENSE(+)

–

VO(+)

LOAD

The power module has extra-low voltage (ELV) outputs

when all inputs are ELV.

VO(–)

VI(+)

SENSE(–)

VI(–)

The input to these units is to be provided with a maxi-

mum 20 A normal-blow fuse in the ungrounded lead.

8-720 (C).c

Feature Descriptions

Overcurrent Protection

Figure 20. Remote On/Off Implementation

To provide protection in a fault (output overload) condi-

tion, the unit is equipped with internal current-limiting

circuitry and can endure current limiting for an unlim-

ited duration. At the point of current-limit inception, the

unit shifts from voltage control to current control. If the

output voltage is pulled very low during a severe fault,

the current-limit circuit can exhibit either foldback or tai-

lout characteristics (output current decrease or

increase). The unit operates normally once the output

current is brought back into its speciﬁed range.

10

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Output Voltage Set-Point Adjustment (Trim)

Feature Descriptions (continued)

Output voltage trim allows the user to increase or

decrease the output voltage set point of a module.This

is accomplished by connecting an external resistor

between the TRIM pin and either the SENSE(+) or

SENSE(–) pins. The trim resistor should be positioned

close to the module.

Remote Sense

Remote sense minimizes the effects of distribution

losses by regulating the voltage at the remote-sense

connections. The voltage between the remote-sense

pins and the output terminals must not exceed the out-

put voltage sense range given in the Feature Speciﬁca-

tions table, i.e.:

If not using the trim feature, leave the TRIM pin open.

With an external resistor between the TRIM and

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

(V^{O, adj}) decreases (see Figure 22). The following equa-

tion determines the required external-resistor value to

obtain a percentage output voltage change of ∆%.

[V^O(+) – V^O(–)] – [SENSE(+) – SENSE(–)] ≤ 0.5 V

The voltage between the V^O(+) and V^O(–) terminals

must not exceed the minimum value of the output over-

voltage protection. This limit includes any increase in

voltage due to remote-sense compensation and output

voltage set-point adjustment (trim). See Figure 21.

100

R^adj-down=

– 2 kΩ

---------

∆%

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.

The test results for this conﬁguration are displayed in

Figure 23. This ﬁgure applies to all output voltages.

With an external resistor connected between the TRIM

and SENSE(+) pins (R^adj-up), the output voltage set

point (V^{O, adj}) increases (see Figure 24).

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 following equation determines the required exter-

nal-resistor value to obtain a percentage output voltage

change of ∆%.

(100 + ∆%)

(100 + 2∆%)

V_O

R^adj-up=

–

kΩ

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

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.

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

1.225∆%

∆%

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 minimum value of the output over-

voltage protection. This limit includes any increase in

voltage due to remote-sense compensation and output

voltage set-point adjustment (trim). See Figure 21.

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.

SENSE(+)

SENSE(–)

V

I

(+)

(–)

V

O

(+)

(–)

I

O

SUPPLY

LOAD

I

V

O

V

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.

CONTACT

RESISTANCE

CONTACT AND

DISTRIBUTION LOSSES

8-651 (C).m

Figure 21. Effective Circuit Conﬁguration for

Single-Module Remote-Sense Operation

Tyco Electronics Corp

11

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Feature Descriptions (continued)

10M

Output Voltage Set-Point Adjustment

(Trim) (continued)

1M

V

I

(+)

VO(+)

ON/OFF SENSE(+)

CASE

(–)

TRIM

RLOAD

100k

10k

Radj-down

V

I

SENSE(–)

VO(–)

8-748 (C).b

0

2

4

6

8

10

Figure 22. Circuit Conﬁguration to Decrease

Output Voltage

% CHANGE IN OUTPUT VOLTAGE (∆%)

8-880 (C).a

Figure 25. Resistor Selection for Increased Output

Voltage

1M

Output Overvoltage Protection

100k

The output overvoltage clamp consists of control cir-

cuitry, independent of the primary regulation loop, that

monitors the voltage on the output terminals. The con-

trol loop of the clamp has a higher voltage set point

than the primary loop (see Feature Speciﬁcations

table). This provides a redundant voltage control that

reduces the risk of output overvoltage.

10k

1k

Overtemperature Protection

100

0

10

20

30

40

The 100 W and 150 W modules feature an overtemper-

ature protection circuit to safeguard against thermal

damage.

% CHANGE IN OUTPUT VOLTAGE (∆%)

8-879 (C)

Figure 23. Resistor Selection for Decreased

Output Voltage

The circuit shuts down the module when the maximum

case temperature is exceeded. The module restarts

automatically after cooling.

VI(+)

VO(+)

ON/OFF SENSE(+)

Radj-up

RLOAD

CASE

VI(–)

TRIM

SENSE(–)

VO(–)

8-715 (C).b

Figure 24. Circuit Conﬁguration to Increase

Output Voltage

12

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Heat Transfer Without Heat Sinks

Thermal Considerations

Introduction

Increasing airﬂow over the module enhances the heat

transfer via convection. Figure 27 shows the maximum

power that can be dissipated by the module without

exceeding the maximum case temperature versus local

ambient temperature (TA) for natural convection

through 4 m/s (800 ft./min.).

The power modules operate in a variety of thermal

environments; however, sufﬁcient cooling should be

provided to help ensure reliable operation of the unit.

Heat-dissipating components inside the unit are ther-

mally coupled to the case. Heat is removed by conduc-

tion, convection, and radiation to the surrounding

environment. Proper cooling can be veriﬁed by mea-

suring the case temperature. Peak temperature (TC)

occurs at the position indicated in Figure 26.

Note that the natural convection condition was mea-

sured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.);

however, systems in which these power modules may

be used typically generate natural convection airﬂow

rates of 0.3 m/s (60 ft./min.) due to other heat dissipat-

ing components in the system. The use of Figure 27 is

shown in the following example.

MEASURE CASE

TEMPERATURE HERE

38.0 (1.50)

Example

7.6 (0.3)

What is the minimum airﬂow necessary for a JW100A

operating at V^I= 54 V, an output current of 20 A, and a

maximum ambient temperature of 40 °C?

V^I(+)

V^O(+)

+ SEN

ON/OFF

Solution

TRIM

CASE

VI (–)

– SEN

Given: V^I= 54 V

I^O= 20 A

V^O(–)

T^A= 40 °C

Determine P^D(Use Figure 30.):

P^D= 17 W

8-716 (C).f

Note: Top view, pin locations are for reference only.

Measurements shown in millimeters and (inches).

Determine airﬂow (v) (Use Figure 27.):

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

Figure 26. Case Temperature Measurement

Location

35

30

4.0 m/s (800 ft./min.)

3.5 m/s (700 ft./min.)

3.0 m/s (600 ft./min.)

2.5 m/s (500 ft./min.)

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

1.5 m/s (300 ft./min.)

1.0 m/s (200 ft./min.)

0.5 m/s (100 ft./min.)

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.

25

20

15

10

Although the maximum case temperature of the power

modules is 100 °C, you can limit this temperature to a

lower value for extremely high reliability.

For additional information on these modules, refer to

the Thermal Management JC-, JFC-, JW-, and JFW-

Series 50 W to 150 W Board-Mounted Power Modules

Technical Note

5

0

0.1 m/s (NAT. CONV.)

(20 ft./min.)

0

10

20

30

40

50

60

70

80

(°C)

90 100

(TN97-008EPS).

LOCAL AMBIENT TEMPERATURE, T

A

8-1150 (C).a

Figure 27. Forced Convection Power Derating with

No Heat Sink; Either Orientation

Tyco Electronics Corp

13

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Thermal Considerations (continued)

20

18

Heat Transfer Without Heat Sinks (continued)

16

14

12

VI

= 72 V

= 54 V

= 36 V

11

10

9

12

10

8

V

I

= 72 V

= 54 V

= 36 V

8

V

I

6

V

I

7

4

6

5

2

4

0

2

4

6

8

14

16

18 20

3

12

10

2

OUTPUT CURRENT, I

O

(A)

1

8-1184 (C)

0

Figure 30. JW100A Power Dissipation vs.

Output Current

0

1

2

3

4

5

6

7

8

9

10

OUTPUT CURRENT, I

O

(A)

8-1182 (C)

Figure 28. JW050A Power Dissipation vs.

Output Current

45

40

35

30

20

18

V

I

= 72 V

= 36 V

= 54 V

16

25

20

15

14

VI = 72 V

VI = 54 V

VI = 36 V

12

10

5

8

6

4

2

0

5

10

15

20

30

25

OUTPUT CURRENT, IO (A)

8-1185 (C)

4

5

1

2

3

6

7

8

9

10 11 12 13 14 15

0

Figure 31. JW150A Power Dissipation vs.

Output Current

OUTPUT CURRENT, IO (A)

8-1183 (C)

Figure 29. JW075A Power Dissipation vs.

Output Current

14

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

These measured resistances are from heat transfer

Thermal Considerations (continued)

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 32 had a

thermal-conductive dry pad between the case and the

heat sink to minimize contact resistance. The use of

Figure 32 is shown in the following example.

Heat Transfer with Heat Sinks

The power modules have through-threaded, M3 x 0.5

mounting holes, which enable heat sinks or cold plates

to attach to the module. The mounting torque must not

exceed 0.56 N-m (5 in.-lb.). 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.).

Example

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

minimum airﬂow necessary? Assume the JW100A

module is operating at V^I= 54 V and an output current

of 20 A, maximum ambient air temperature of 40 °C,

and the heat sink is 1/2 inch.

Thermal derating with heat sinks is expressed by using

the overall thermal resistance of the module.Total mod-

ule thermal resistance (θca) is deﬁned as the maximum

case temperature rise (∆T^{C, max}) divided by the module

power dissipation (PD):

Solution

Given: VI = 54 V

IO = 20 A

(T^C– TA)

∆TC, max

TA = 40 °C

TC = 85 °C

θca =

=

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

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

PD

Heat sink = 1/2 in.

The location to measure case temperature (TC) is

shown in Figure 26. Case-to-ambient thermal resis-

tance vs. airﬂow is shown, for various heat sink conﬁg-

urations and heights, in Figure 32. These curves were

obtained by experimental testing of heat sinks, which

are offered in the product catalog.

Determine PD by using Figure 30:

PD = 17 W

Then solve the following equation:

(TC – TA)

θca =

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

8

PD

1 1/2 IN. HEAT SINK

1 IN. HEAT SINK

1/2 IN. HEAT SINK

1/4 IN. HEAT SINK

7

6

5

4

3

2

1

0

(85 – 40)

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

17

NO HEAT SINK

θca = 2.6 °C/W

Use Figure 32 to determine air velocity for the 1/2 inch

heat sink.

The minimum airﬂow necessary for the JW100A mod-

ule is 1.3 m/s (260 ft./min.).

0

0.5

(100)

1.0

(200)

1.5

(300)

2.0

(400)

2.5

3.0

(500) (600)

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

8-1153 (C)

Figure 32. Case-to-Ambient Thermal Resistance

Curves; Either Orientation

Tyco Electronics Corp

15

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Thermal Considerations (continued)

Solder, Cleaning, and Drying

Considerations

Custom Heat Sinks

Post solder cleaning is usually the ﬁnal circuit-board

assembly process prior to electrical testing. The result

of inadequate 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 dry-

ing procedures, refer to the Board-Mounted Power

Modules Soldering and Cleaning Application Note

(AP97-021EPS).

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 33).

TC

TS

TA

PD

cs

sa

EMC Considerations

8-1304 (C)

Figure 33. Resistance from Case-to-Sink and

Sink-to-Ambient

For assistance with designing for EMC compliance,

please refer to the FLTR100V10 data sheet

(DS98-152EPS).

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:

Layout Considerations

(TC – TA)

θsa =

– θcs

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

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).

PD

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.

16

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

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

57.9 (2.28) MAX

61.0

(2.40)

MAX

Side View

SIDE LABEL*

12.70 ± 0.5

(0.500 ± 0.020)

2.06 (0.081) DIA

1.02 (0.040) DIA

SOLDER-PLATED

BRASS, 7 PLACES

5.1 (0.20) MIN

SOLDER-PLATED BRASS,

2 PLACES (–OUTPUT

AND +OUTPUT)

Bottom View

MOUNTING INSERTS

M3 x 0.5 THROUGH,

4 PLACES

12.7 (0.50)

5.1 (0.20)

VO (–)

VI (–)

10.16

(0.400)

10.16

(0.400)

17.78

CASE

(0.700)

–SEN

TRIM

+SEN

25.40

(1.000)

50.8

(2.00)

25.40

(1.000)

35.56

(1.400)

35.56

(1.400)

ON/OFF

VI (+)

VO (+)

48.26

(1.900)

4.8

(0.19)

48.3 (1.90)

8-1945 (C).a

* Side label includes Tyco name, product designation, safety agency markings, input/output voltage and current ratings, and bar code.

Tyco Electronics Corp

17

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Recommended Hole Pattern

Component-side footprint.

Dimensions are in millimeters and (inches).

57.9 (2.28) MAX

4.8

(0.19)

48.3 (1.90)

48.26

(1.900)

V^O(+)

V^I(+)

35.56

+SEN

TRIM

–SEN

ON/OFF

(1.400)

25.40

(1.000)

50.8

25.40

(2.00)

(1.000)

61.0

(2.40)

MAX

17.78

(0.700)

CASE

VI (–)

10.16

(0.400)

10.16

(0.400)

VO (–)

5.1 (0.20)

12.7 (0.50)

MOUNTING INSERTS

MODULE OUTLINE

8-1945 (C).a

Ordering Information

Table 4. Device Codes

Input

Voltage

Output

Voltage

Output

Power

Remote On/Off

Logic

Device

Code

Comcode

48 V

5.0 V

50 W

75 W

Negative

Positive

JW050A1

JW075A1

JW100A1

JW150A1

JW050A

JW075A

JW100A

JW150A

107361370

107071581

107361404

107361453

107304792

107361388

107002750

107361446

100 W

150 W

50 W

75 W

100 W

150 W

18

Tyco Electronics Corp

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Ordering Information (continued)

Table 5. Device Accessories

Accessory

Comcode

1/4 in. transverse kit (heat sink, thermal pad, and screws)

1/4 in. longitudinal kit (heat sink, thermal pad, and screws)

1/2 in. transverse kit (heat sink, thermal pad, and screws)

1/2 in. longitudinal kit (heat sink, thermal pad, and screws)

1 in. transverse kit (heat sink, thermal pad, and screws)

1 in. longitudinal kit (heat sink, thermal pad, and screws)

1 1/2 in. transverse kit (heat sink, thermal pad, and screws)

1 1/2 in. longitudinal kit (heat sink, thermal pad, and screws)

407243989

407243997

407244706

407244714

407244722

407244730

407244748

407244755

Dimensions are in millimeters and (inches).

1/4 IN.

1/2 IN.

1/4 IN.

1/2 IN.

1 IN.

61

(2.4)

57.9

(2.28)

1 1/2 IN.

57.9 (2.28)

61 (2.4)

D000-c.cvs

D000-d.cvs

Figure 34. Longitudinal Heat Sink

Figure 35.Transverse Heat Sink

Tyco Electronics Corp

19

JW050A, JW075A, JW100A, JW150A Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W

Data Sheet

July 1999

Tyco Electronics Power Systems, Inc.

3000 Skyline Drive, Mesquite, TX 75149, USA

+1-800-526-7819 FAX: +1-888-315-5182

(Outside U.S.A.: +1-972-284-2626, FAX: +1-972-284-2900

http://power.tycoeleectronics.com

Tyco Electronics Corportation 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.

Printed on

Recycled Paper

July 1999

DS99-284EPS (Replaces DS98-088EPS)


型号：	JW075A
厂家：	TE CONNECTIVITY
描述：	Power Modules: dc-dc Converters; 36 to 75 Vdc Input, 5 Vdc Output; 50 W to 150 W 电源模块： DC-DC转换器; 36至75伏直流输入， 5伏直流输出; 50瓦到150瓦转换器电源电路 DC-DC转换器
文件：	总20页 (文件大小：1029K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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