DW025AB-M_技术文档

Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Options

n Higher-accuracy output voltage clamp set point

n Short pins: 2.79 mm ± 0.25 mm

(0.110 in. ± 0.010 in.)

n Heat sink available for extended operation

n Negative logic remote on/off

Description

The DW025-Series Power Modules are a family of

dc-dc converters that operate over an input voltage

The DW025-Series Power Modules use advanced, surface-

range of 36 Vdc to 75 Vdc and provide two regulated

outputs. These modules offer low noise levels with

industry-standard pinouts in a small footprint. Each

highly reliable and efficient unit features remote

on/off and current limit.

mount technology and deliver high-quality, compact, dc-dc

conversion at an economical price.

Features

Each output is individually regulated by its own con-

trol circuit and has an independent overvoltage

clamp. With standard outputs of +3.3 V, ±5 V, ±12 V,

and ±15 V, the DW025-Series is flexible enough to

provide modified standard units with any combination

of output voltages from 2 V to 15 V.

n Small size: 71.1 mm x 61.0 mm x 12.7 mm

(2.80 in. x 2.40 in. x 0.50 in.)

n Low output noise

n Industry-standard pinout

n Metal case with separate case ground pin

n 2:1 input voltage range

Efficiency greater than 80%, a wide operating tem-

perature range, and a metal case are additional fea-

tures of these modules. They have UL, CSA, and

VDE recognition and operate within FCC and CISPR

Class A limits for radiated emissions.

n Remote on/off (positive logic)

n UL* Recognized, CSA^†Certified, and VDE

Licensed

n Within FCC and CISPR Class A Radiated Limits

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

The DW025AJ-M, BK-M, and CL-M Power Modules

are available with common output ground pins

(pinout A); the DW025AA-M, AB-M, AF-M, BB-M,

and CC-M Power Modules are available with sepa-

rate output ground pins (pinout B).

‡

directives

n Two tightly regulated outputs

Applications

* UL is a registered trademark of Underwriters Laboratories, Inc.

† CSA is a registered trademark of the Canadian Standards Asso-

ciation.

‡ 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.)

n Distributed power architectures

n Telecommunications

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

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

Transient (<10 ms)

VI

VI, trans

—

80

100

V

I/O Isolation Voltage

dc

Transient (1 minute)

Operating Case Temperature

Storage Temperature

—

500

850

V

TC

–40

–55

100

125

°C

Tstg

Electrical Specifications

Note: Two pinouts are available for the DW025-Series Power Modules. The DW025AJ-M, AB-M, BK-M, and

CL-M Power Modules, which have both positive and negative outputs, have a common output ground pin

(pinout A). The DW025AA-M, AB-M, AF-M, BB-M, and CC-M Power Modules, which have dual positive out-

puts, have separate output ground pins (pinout B). See Outline Diagrams section.

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

temperature conditions.

Table 1. Input Specifications

Parameter

Operating Input Voltage

Symbol

VI

Min

36

Typ

48

Max

75

Unit

Vdc

A

Maximum Input Current

II, max

—

2.0

(VI = 0 V to 75 V; IO = IO, max; see Figure 1.)

Inrush Transient

i²t

—

0.8

—

A²s

Input Reflected-ripple Current, Peak-to-Peak

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

TC = 25 °C) (See Figure 11 and Design

Considerations section.)

—

25

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, dc fuse with a maximum rating of 5 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

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DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Electrical Specifications (continued)

Table 2. Output Specifications

Parameter

Device

Symbol

Min

Typ

Max

Unit

Output Voltage

DW025AJ-M

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

4.80

–4.80

11.40

–11.40

14.25

–14.25

4.80

11.40

4.80

3.16

—

5.25

–5.25

12.60

–12.60

15.75

–15.75

5.25

12.60

5.25

3.45

Vdc

(Over all operating input voltage,

resistive load, and temperature

conditions until end of life. See

Figure 13.)

DW025BK-M

DW025CL-M

DW025AA-M

DW025AB-M

DW025AF-M

DW025BB-M

DW025CC-M

11.40

14.25

12.60

15.75

Output Voltage Set Point

(VI = 48 V; IO = IO, max; TA = 25 °C)

DW025AJ-M

DW025BK-M

DW025CL-M

DW025AA-M

DW025AB-M

DW025AF-M

DW025BB-M

DW025CC-M

VO1, set

VO2, set

VO1, set

VO2, set

VO1, set

VO2, set

VO1, set

VO2, set

VO1, set

VO2, set

VO1, set

VO2, set

VO1, set

VO2, set

VO1, set

VO2, set

4.90

–4.90

11.76

–11.76

14.70

–14.70

4.90

11.76

4.90

3.23

5.0

–5.0

12.0

–12.0

15.0

–15.0

5.0

12.0

5.0

3.3

5.10

–5.10

12.24

–12.24

15.30

–15.30

5.10

12.24

5.10

3.37

Vdc

11.76

14.70

12.0

15.0

12.24

15.30

Output Regulation:

Line (VI = 36 V to 75 V)

Load (IO1 = IO, min to IO, max, IO2 = IO, max)

All

—

0.1

0.2

0.4

%

Load (IO2 = IO, min to IO, max, IO1 = IO, max)

DW025AJ-M,

AA-M, BK-M,

BB-M, CL-M,

CC-M, AB-M

—

0.1

0.4

%

DW025AF-M

—

0.4

15

0.8

70

%

Temperature

(TC = –40 °C to +100 °C)

DW025AJ-M,

AA-M, AF-M

mV

DW025BK-M,

BB-M

—

40

15

40

150

190

70

mV

DW025CL-M,

CC-M

DW025AB-M

(5 V output)

DW025AB-M

(12 V output)

150

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3

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Electrical Specifications (continued)

Table 2. Output Specifications (continued)

Parameter

Device

Symbol Min

Typ Max

Unit

Output Ripple and Noise

(See Figure 12.):

RMS

DW025AJ-M,

AA-M, AF-M

—

15

mVrms

DW025BK-M, BB-M

DW025CL-M, CC-M

—

20

25

15

mVrms

DW025AB-M

(5 V output)

DW025AB-M

(12 V output)

—

20

mVrms

mVp-p

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

DW025AJ-M,

AA-M, AF-M

150

DW025BK-M, BB-M

DW025CL-M, CC-M

—

200

250

150

mVp-p

DW025AB-M

(5 V output)

DW025AB-M

(12 V output)

—

200

mVp-p

Output Current

(At IO < IO, min, the modules may exceed

output ripple specifications.)

DW025AJ-M,

AA-M, AF-M

IO1

IO2

0.20

—

2.50

A

DW025BK-M, BB-M

DW025CL-M, CC-M

DW025AB-M

IO1

IO2

0.10

—

1.04

A

IO1

IO2

0.08

—

0.83

A

IO1

IO2

0.20

0.10

—

2.50

1.04

A

Output Current-limit Inception

(VO = 90% of VO, nom; see Figure 2.)

DW025AJ-M,

AA-M, AF-M

—

3.7

6.5

A

DW025BK-M, BB-M

DW025CL-M, CC-M

DW025AB-M

—

1.5

1.3

2.9

2.7

A

IO1

IO2

—

3.7

1.5

6.5

2.9

A

Output Short-circuit Current

(VO = 250 mV)

DW025AJ-M,

AA-M, AF-M

—

3.5

7.0

A

DW025BK-M, BB-M

DW025CL-M, CC-M

DW025AB-M

—

1.0

3.0

A

IO1

IO2

—

3.5

1.0

7.0

3.0

A

Efficiency (VI = 48 V; IO = IO, max;

TC = 25 °C; see Figures 3 and 13.)

DW025AJ-M, AA-M

DW025AF-M

η

75

68

75

79

78

75

79

82

—

%

DW025AB-M

DW025BK-M, BB-M

DW025CL-M, CC-M

4

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DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Electrical Specifications (continued)

Table 2. Output Specifications (continued)

Parameter

Device

Symbol

Min

Typ

Max

Unit

Dynamic Response

(ýIO/ýt = 1 A/10 µs, VI = 48 V,

TA = 25 °C):

Load Change from IO = 50% to 75% of

I^{O, max}: (See Figures 7 to 9.):

Peak Deviation

DW025AJ-M,

AA-M, AF-M

—

160

250

160

250

3

—

mV

ms

DW025BK-M,

BB-M

DW025CL-M,

CC-M

DW025AB-M

(5 V output)

DW025AB-M

(12 V output)

Settling Time (VO < 10% peak

deviation)

All

Load Change from IO = 50% to 25% of

I^{O, max}(See Figures 4 to 6.):

Peak Deviation

DW025AJ-M,

AA-M, AF-M

—

160

250

160

250

3

—

mV

ms

DW025BK-M,

BB-M

DW025CL-M,

CC-M

DW025AB-M

(5 V output)

DW025AB-M

(12 V output)

Settling Time (VO < 10% peak

deviation)

All

Table 3. Isolation Specifications

Parameter

Isolation Capacitance

Min

Typ

1200

—

Max

Unit

pF

—

Isolation Resistance

10

M¾

General Specifications

Parameter

Min

Typ

Max

Unit

hours

g (oz.)

Calculated MTBF (IO = 80% of IO, max; TC = 40 °C)

Weight

2,800,000

—

113 (4.0)

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DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Feature Specifications

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

conditions. See Feature Descriptions and Design Considerations for further information.

Parameter

Device

Symbol

Min

Typ

Max

Unit

Remote On/Off (positive logic)

(VI = 0 V to 75 V; open collector or

equivalent compatible; signal

referenced to V^I(–) terminal. See

Figures 10, 14 and Feature

Descriptions.):

DW025xx-M Positive Logic:

Logic Low—Module Off

Logic High—Module On

DW025xx1-M Negative Logic:

Logic Low—Module On

Logic High—Module Off

Module Specifications:

On/Off Current—Logic Low

On/Off Voltage:

All

Ion/off

—

1.0

mA

Logic Low

Logic High (Ion/off = 0)

All

Von/off

0

—

1.2

10

V

Open Collector Switch Specifications:

Leakage Current During Logic High

(V^on/off= 10 V)

Output Low Voltage During Logic

Low (Ion/off = 1 mA)

Turn-on Time (IO = 80% of IO, max; VO

within ±1% of steady state)

Output Voltage Overshoot

All

Ion/off

Von/off

—

30

0

50

1.2

—

5

µA

V

ms

All

—

%

Output Overvoltage Clamp

DW025AJ-M

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

VO1

VO2

—

7

–7

16

–16

20

–20

7

16

7

5

V

DW025BK-M

DW025CL-M

DW025AA-M

DW025AB-M

DW025AF-M

DW025BB-M

DW025CC-M

16

20

Input Undervoltage Lockout:

Module On

All

VUVLO

—

20

28

36

—

V

Module Off

6

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Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Characteristic Curves

85

80

1.2

1.0

1.2

1.0

0.8

V

O

75

70

CC,CL

0.8

0.6

0.4

0.2

0

65

60

55

50

45

BB,BK

AA,AJ

AF

0.6

0.4

I

0.2

0.0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9 1.0

0

10

20

30

40

50

60

70

NORMALIZED BOTH OUTPUT CURRENTS TO

FULL LOAD, I (A)

INPUT VOLTAGE, V

I

(V)

O

8-993(C).a

8-995(C)

Figure 1. DW025-Series Input Current and Normal-

ized Output Voltage vs. Input Voltage at

Full Load and TA = 25 °C

Figure 3. DW025-Series Efﬁciency vs. Normalized

Both Output Currents to Full Load at

VI = 48 V and TA = 25 °C

1.2

1.0

50 mV

0.8

0.6

VO

= 3.3 V

5 V

12 V

15 V

0.4

0.2

0.0

5.0 V

1.0 A

0.0

0.5

1.0

1.5

2.0

2.5

(A)

∆I

∆t

^O= 1 A/10 µs

0.5 A

NORMALIZED OUTPUT CURRENT TO FULL LOAD, I

O

8-994(C)

0.5 ms

0.5 A

Figure 2. DW025-Series Normalized Output Current

vs. Normalized Output Voltage at

VI = 48 V and TA = 25 °C

TIME, t (0.5 ms/div)

8-1019(C)

Figure 4. DW025-Series Typical 5 V Output Voltage

Response to a Step Load Change from

50% to 25% of I^{O, max}at VI = VI, nom and

TA = 25 °C

Characteristic Curves (continued)

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DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

100 mV

50 mV

5.0 V

12.0 V

1.5 A

1.0 A

∆I

^O= 1 A/10 µs

∆t

0.416 A

0.208 A

∆I

^O= 1 A/10 µs

∆t

0.2 A

0.5 ms

0.5 A

TIME, t (0.5 ms/div)

8-1017(C)

TIME, t (0.5 ms/div)

8-1018(C)

Figure 5. Typical DW025-Series 12V OutputVoltage

Response to a Step Load Change from

50% to 25% of IO, max at VI = VI, nom and

TA = 25 °C

Figure 7. Typical DW025-Series 5 V Output Voltage

Response to a Step Load Change from

50% to 75% of IO, max at VI = VI, nom and

TA = 25 °C

100 mV

12.0 V

15.0 V

0.624 A

0.333 A

∆I

^O= 1 A/10 µs

∆I

∆t

^O= 1 A/10 µs

∆t

0.416 A

0.166 A

0.2 A

0.5 ms

0.2 A

0.5 ms

TIME, t (0.5 ms/div)

8-1017(C).a

TIME, t (0.5 ms/div)

Figure 6. Typical DW025-Series 15V OutputVoltage

Response to a Step Load Change from

50% to 25% of IO, max at VI = VI, nom and

TA = 25 °C

8-1017(C).b

Figure 8. Typical DW025-Series 12V OutputVoltage

Response to a Step Load Change from

50% to 75% of IO, max at VI = VI, nom and

TA = 25 °C

8

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Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Characteristic Curves (continued)

Test Conﬁgurations

TO OSCILLOSCOPE

100 mV

LTEST

VI(+)

12 µH

15.0 V

CS 220 µF

IMPEDANCE < 0.1 Ω

@ 20 °C, 100 kHz

BATTERY

VI(–)

0.500 A

∆I

∆t

^O= 1 A/10 µs

8-489(C).a

0.333 A

Note: Measure input reﬂected-ripple current with a simulated source

impedance (LTEST) of 12 µH. Capacitor CS offsets possible

battery impedance. Current is measured at the input of the

module.

0.2 A

0.5 ms

Figure 11. Input Reﬂected-Ripple Test Setup

TIME, t (0.5 ms/div)

8-1018(C).a

Figure 9. Typical DW025-Series 15V OutputVoltage

Response to a Step Load Change from

50% to 75% of IO, max at VI = VI, nom and

TA = 25 °C

VO, set

0 V

2 V

0 V

∆I

∆t

O

= 1 A/10 µs

1 ms

TIME, t (1 ms/div)

8-1020(C)

Figure 10. Typical DW025-Series Output Voltage

Rise Time with Remote On/Off at

VI = VI, nom, IO = 0.8 (IO, max) and TA = 25 °C

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DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Test Conﬁgurations (continued)

CONTACT AND

DISTRIBUTION LOSSES

VO1

V

I(+)

LOAD

I

O

I

COPPER STRIP

0.1 µF

COM

SUPPLY

VO1(+)

COMM

V^O2(–)

LOAD

RLOAD1

VO2

SCOPE

VI

(–)

CONTACT

RESISTANCE

8-753(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.

In addition, VI(–) is internally connected to case.

0.1 µF

RLOAD2

2

8-808(C)

[V^OJ– COM]IOJ

∑

A.Pinout A (DW025AJ-M, BK-M, CL-M) Conﬁgura-

tion

Pinout A

J = 1

η =

x 100

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

[VI(+) – VI(–)]II

2

COPPER STRIP

[V^OJ(+) – V^OJ(–)]I^OJ

V

O1(+)

O1(–)

∑

J = 1

0.1 µF

R

LOAD1

Pinout B

SCOPE

η =

x 100

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

[V^I(+) – V^I(–)]I^I

V

O2(+)

O2(–)

Figure 13. Output Voltage and Efﬁciency Measure-

ment Test Setup

RLOAD2

0.1 µF

V

Design Considerations

Input Source Impedance

8-809(C)

B.Pinout B (DW025AA-M, AB-M, AF-M, BB-M,

CC-M) Conﬁguration

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. A 33 µF electrolytic capacitor (ESR < 0.7 Ω at

100 kHz) mounted close to the power module helps

ensure stability of the unit.

Note: Use a 0.1 µF ceramic capacitor. Scope measurement should

be made by using a BNC socket. Position the load between

50 mm (2 in.) and 75 mm (3 in.) from the module.

Figure 12. Output Noise Measurement Test Setup

10

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Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Current Limit

Design Considerations (continued)

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 unlimited

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

shifts from voltage control to current control. If the out-

put 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 operates normally once the output current is

brought back into its speciﬁed range.

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 22.2-950, EN60950.

For the converter output to be considered to be meet-

ing the requirements of safety extra-low voltage

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

■ All inputs are SELV and ﬂoating with the output also

ﬂoating.

Remote On/Off

■ All inputs are SELV and grounded with the output

also grounded.

Two remote on/off options are available. Positive logic

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

voltage on the remote on/off pin, and off during a logic

low. Negative logic remote on/off, code sufﬁx “1,” turns

the module off during a logic high and on during a logic

low.

■ Any non-SELV input must be provided with rein-

forced insulation from any other hazardous voltages,

including the ac mains, and must have a SELV reli-

ability test performed on it in combination with the

converters.

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 14). A logic low is Von/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.

If the input meets extra-low voltage (ELV) require-

ments, then the converter’s output is considered ELV.

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

mum 5 A normal-blow fuse in the ungrounded lead.

During a logic high, the maximum Von/off generated by

the power module is 10 V. The maximum allowable

leakage current of the switch at V^on/off= 10 V is 50 µA.

Input/Output Voltage Reversal

CAUTION: Applying a reverse voltage across the

module input or output forward biases

an internal diode. Attempting to start

the module under this condition can

damage the module.

V

I

(+)

(–)

V

O1

–

LOAD

V

on/off

COM

Feature Descriptions

+

V

O2

ON/OFF

Output Overvoltage Clamp

I

on/off

The output overvoltage clamp 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.

8-754(C)

Figure 14. Remote On/Off Implementation

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Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Thermal Considerations

WIND TUNNEL WALL

MEASURE CASE

TEMPERATURE AT

CENTER OF UNIT

AIR-

FLOW

CONNECTORS TO

LOADS, POWER

SUPPLIES, AND

DATALOGGER,

6.35 (0.25) TALL

203.2

(8.00)

50.8

(2.00)

AIRFLOW

101.6

(4.00)

AIR VELOCITY PROBE

AMBIENT TEMPERATURE

THERMOCOUPLE

12.7 (0.50)

203.2 (8.00)

9.7 (0.38)

19.1 (0.75)

8-866(C).a

Note: Dimensions are in millimeters and (inches). Drawing is not to scale.

Figure 15. Thermal Test Setup

The 25 W dual output power modules are designed to

operate in a variety of thermal environments. As with

any electronic component, sufﬁcient cooling must be

provided to help ensure reliable operation of the unit.

Heat-dissipating components inside the module are

thermally coupled to the case. Heat is removed by con-

duction, convection, and radiation to the surrounding

environment.

The thermal data presented is based on measure-

ments taken in a wind tunnel. The test setup shown in

Figure 15 was used to collect data. Actual performance

can vary depending on the particular application

environment.

12

Lineage Power

Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Air Velocity

Thermal Considerations (continued)

The air velocity required to maintain a desired maxi-

mum case temperature for a given power dissipation

and ambient temperature can be calculated using

Figure 21 and the following equation:

Basic Thermal Performance

The DW025-Series Dual Output Power Modules have a

separate power stage for each of the outputs. This

means that the maximum operating temperature can

be predicted quite closely by treating each output indi-

vidually and then summing the results. Figures 16

through 21 are used to predict the safe operating con-

dition for many different operating and environmental

conditions.

TC, max – TA

P^Dtotal

θ^CA=

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

where θ^CAis the thermal resistance from case-to-ambi-

ent air (°C/W), TC, max is the desired maximum case

temperature (°C), TA is the ambient inlet temperature

(°C), and PDtotal is the total power dissipated from the

module (W).

The method used to determine the maximum ambient

temperature at a given air velocity is a four-step pro-

cess.

For example, to maintain a maximum case temperature

of 85 °C with an ambient inlet temperature of 55 °C and

a power dissipation of 6.7 W, the thermal resistance is:

1. Find the power dissipated for output 1 by using the

appropriate chart (Figures 16 through 19) for a par-

ticular output condition (I^O1).

85 °C – 55 °C

θ^CA≤

= 4.5 °C/W

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

6.7 W

2. Repeat step 1 for output 2 using Figures 16 through

19.

This corresponds to an air velocity greater than

0.46 ms^–1(90 fpm) in Figure 21.

3. Find the total power dissipated by summing the

power dissipated on each of the outputs:

(P^DOUT1+ P^DOUT2) = P^Dtotal

4. Use the total power dissipated with Figure 20 to

determine the maximum ambient temperature at dif-

ferent air velocities.

For example, the DW025AF-M power module operating

at full load on both outputs with 54 V input has a power

dissipation of 3.6 W (from Figure 17) plus 3.1 W (from

Figure 16) for a total of 6.7 W. Using Figure 20, it can

be determined that the maximum ambient temperature

at natural convection that the DW025AF-M can operate

at is approximately 56 °C.

Keep in mind that these are approximations of the tem-

peratures and airﬂows required to keep the case tem-

perature below its maximum rating.The maximum case

temperature at the point shown in Figure 15 must be

kept at 100 °C or less.

Lineage Power

13

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Thermal Considerations (continued)

3.0

Air Velocity (continued)

2.5

2.0

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0

1.5

1.0

0.5

0.0

V

I

= 36 V

V

I

= 72 V

= 54 V

= 36 V

= 54 V

= 72 V

1.0

1.2

0.0

0.2

0.4

0.6

0.8

(A)

OUTPUT CURRENT, I

O

8-1005(C).a

Figure 18. 12 V Output Power Dissipation vs.

Output Current

0

0.5

1.0

1.5

2.0

2.5

OUTPUT CURRENT, I

O

(A)

8-986(C).a

Figure 16. 3.3 V Output Power Dissipation vs.

Output Current

3.0

2.5

2.0

1.5

4.0

3.5

3.0

V

I

= 36 V

= 54 V

= 72 V

VI = 72 V

VI = 54 V

VI = 36 V

1.0

0.5

0.0

2.5

2.0

1.5

1.0

0.5

0

0.0

0.1

0.2

0.3

0.4

0.5

0.6

(A)

0.7

0.8 0.9

OUTPUT CURRENT, I

O

8-999(C).a

Figure 19. 15 V Output Power Dissipation vs.

Output Current

0

0.5

1.0

1.5

2.0

2.5

OUTPUT CURRENT, IO (A)

8-987(C).a

Figure 17. 5 V Output Power Dissipation vs. Output

Current

14

Lineage Power

Data Sheet

April 2008

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Thermal Considerations (continued)

Air Velocity (continued)

Use of Heat Sinks and Cold Plates

The DW025-Series case includes through-threaded

M3 x 0.5 mounting holes allowing attachment of heat

sinks or cold plates from either side of the module. The

mounting torque must not exceed 0.56 N/m (5 in.-lb.).

10.0

9.0

The following thermal model can be used to determine

the required thermal resistance of the sink to provide

the necessary cooling:

8.0

7.0

6.0

5.0

Ts

Tc

l

TA

2.03 ms ^–1(400 ft./min)

1.02 ms ^–1(200 ft./min)

0.51 ms ^–1(100 ft./min)

0.31 ms ^–1(60 ft./min)

NATURAL

PD

4.0

3.0

2.0

θSA

θCS

where PD is the power dissipated by the module, θCS

represents the interfacial contact resistance between

the module and the sink, and θ^SAis the sink-to-ambient

thermal impedance (°C/W). For thermal grease or foils,

a value of θCS = 0.1 °C/W—0.3 °C/W is typical.

CONVECTION

1.0

0.0

40

50

60

70

80

90

100

LOCAL AMBIENT TEMPERATURE, T

A

(°C)

8-988(C)

The required θSA is calculated from the following equa-

tion:

Figure 20. Total Power Dissipation vs. Local

Ambient Temperature and Air Velocity

θSA = [(Tc – TA)/PD] – θCS

Note that this equation assumes that all dissipated

power must be shed by the heat sink. Depending on

the user-deﬁned application environment, a more accu-

rate model including heat transfer from the sides and

bottom of the module can be used. This equation pro-

vides a conservative estimate in such instances.

7.0

6.0

5.0

4.0

3.0

For further information, refer to the Thermal Energy

Management CC-, CW-, DC-, and DW-Series 25 W

to 30 W Board-Mounted Power Modules Technical

Note.

2.0

1.0

0.0

0.25 0.51 0.76 1.02 1.27 1.52 1.78 2.03

(50) (100) (150) (200) (250) (300) (350) (400)

NAT

CONV

VELOCITY ms ^–1(ft./min.)

8-989(C)

Figure 21. Case-to-AmbientThermal Resistance vs.

Air Velocity

Lineage Power

15

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Outline Diagrams

Dimensions are in millimeters and (inches).

Copper paths must not be routed beneath the power module standoffs.

Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.).

Pinout A (DW025AJ-M, BK-M, CL-M)

Top View

71.1 (2.80) MAX

PIN 1 INDICATOR

61.0

M3

(2.40)

MAX

DC-DC Power Module

MADE IN USA

Side View

0.51

(0.020)

12.7 (0.50)

MAX

5.1 (0.20)

MIN

1.02 (0.040) ± 0.08 (0.003) DIA

TIN-PLATED

BRASS, 8 PLACES

Bottom View

STAND-OFF,

4 PLACES

4.8 (0.19)

5.1 (0.20)

7.1 (0.28)

5

V

O2(–)

4

3

20.32

(0.800)

V

I

(–)

(+)

10.16

10.16 (0.400)

50.8

(0.400)

6

7

(2.00)

COM

10.16 (0.400)

20.32

2

1

20.32

(0.800)

CASE

V

O1(+)

(0.800)

MOUNTING INSERTS

M3 x 0.5 THROUGH,

4 PLACES

8

30.5

(1.20)

NC

ON/OFF

48.3 (1.90)

11.4 (0.45)

3.8 (0.15)

63.50 ± 0.38 (2.500 ± 0.015)

8-845(C).a

16

Lineage Power

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Outline Diagrams (continued)

Dimensions are in millimeters and (inches).

Copper paths must not be routed beneath the power module standoffs.

Tolerances: x.x ± 0.5 mm (0.02 in.), x.xx ± 0.25 mm (0.010 in.).

Pinout B (DW025AA-M, AB-M, AF-M, BB-M, CC-M)

Top View

71.1 (2.80) MAX

PIN 1 INDICATOR

Lucent

61.0

(2.40)

MAX

M3

DC-DC Power Module

MADE IN USA

Side View

0.51

(0.020)

12.7 (0.50)

MAX

5.1 (0.20)

MIN

1.02 (0.040) ± 0.08 (0.003) DIA

TIN-PLATED

BRASS, 9 PLACES

Bottom View

STAND-OFF,

4 PLACES

4.8 (0.19)

5.1 (0.20)

7.1 (0.28)

5

6

7

8

9

VO2(–)

V^O2(+)

20.32

4

3

(0.800)

V^I(–)

VI(+)

10.16 (0.400)

50.8

(2.00)

VO1(–)

10.16 (0.400)

20.32

10.16 (0.400)

2

1

V^O1(+)

NC

CASE

20.32

(0.800)

MOUNTING INSERTS

M3 x 0.5 THROUGH,

4 PLACES

30.5

(1.20)

ON/OFF

48.3 (1.90)

11.4 (0.45 )

3.8 (0.15)

63.50 ± 0.38 (2.500 ± 0.015)

8-846(C).a

Lineage Power

17

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Recommended Hole Patterns

Component-side footprint.

Dimensions are in millimeters and (inches).

Recommended hole size for pin: 1.27 mm (0.050 in.).

Pinout A (DW025AJ-M, BK-M, CL-M)

M3 x 0.5 CLEARANCE HOLE

4 PLACES (OPTIONAL)

CASE OUTLINE

1

2

8

7

30.5

(1.20)

10.16

(0.400)

20.32

(0.800)

10.16 (0.400)

6

3

4

50.8

(2.00)

61.0

(2.40)

MAX

10.16 (0.400 )

20.32

(0.800)

5

5.1 (0.20)

48.3 (1.90)

11.4 (0.45)

3.8 (0.15)

63.50 ± 0.38 (2.500 ± 0.015)

71.1 (2.80) MAX

8-845(C).a

Pinout B (DW025AA-M, AB-M, AF-M, BB-M, CC-M)

CASE OUTLINE

M3 x 0.5 CLEARANCE HOLE

4 PLACES (OPTIONAL)

1

9

30.5

(1.20)

20.32

(0.800)

8

2

20.32

(0.800)

10.16 (0.400)

3

50.8

(2.00)

7

61.0

10.16 (0.400)

(2.40)

4

6

MAX

20.32

(0.800)

5

5.1 (0.20 )

48.3 (1.90)

11.4 (0.45)

63.50 ± 0.38 (2.500 ± 0.015)

3.8 (0.15)

71.1 (2.80) MAX

8-846(C).a

18

Lineage Power

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Ordering Information

Table 4. Ordering Information Table

Input

Voltage

Output

Voltage

Output

Power

Remote

On/Off Logic

Device Code

Pinout

Comcode

36 V to 75 V

5.0 V, –5.0 V

12.0 V, –12.0 V

15.0 V, –15.0 V

5.0 V, –5.0 V

5.0 V, 3.3 V

25 W

positive

DW025AJ-M

DW025BK-M

DW025CL-M

DW025AA-M

DW025AF-M

DW025BB-M

DW025CC-M

DW025AB-M

A

B

107587545

107587602

107587628

107731598

107587529

107587586

TBD

12.0 V, 12.0 V

15.0 V, 15.0 V

5.0 V, 12.0 V

107587503

Optional features may be ordered using the device code suffixes shown below. To order more than one option, list

suffixes in numerically descending order followed by the -M suffix, indicating metric (M3 x 0.5 heat sink hardware).

The heat sinks designed for this package have an M prefix, i.e., MHSTxxx45 and MHSLxxx45 (see Thermal

Energy Management CC-, CW-, DC-, and DW-Series 25 W to 30 W Board-Mounted Power Modules Technical

Note).

Table 5. Options Table

Device Code

Option

Suffix

Short pins: 2.79 mm ± 0.25 mm

(0.110 in. ± 0.010 in.)

8

Negative Remote on/off logic

1

Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability.

Lineage Power

19

DW025 Dual Output-Series Power Modules: dc-dc Converters;

36 Vdc to 75 Vdc Input; Dual Outputs; 25 W

Data Sheet

April 2008

Asia-Pacific Headquarters

Tel: +65 641 6 4283

Europe, Middle-East and Afric a He adquarters

Tel: +49 89 6089 286

World Wide Headquarters

Lineage Power Corporation

3000 Skyline Drive, Mesquite, TX 75149, USA

+1-800-526-7819

India Headquarters

Tel: +91 80 28411633

(Outsid e U.S.A .: +1-97 2-2 84-2626)

www.line agepower.com

e-m ail: techsupport1@linea gepower.com

Lineage Power reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or

application. No rights under any patent accompany the sale of any such product(s) or information.

April 2008

DS96-078EPS (Replaces DS96-077EPS)


型号：	DW025AB-M
厂家：	VISHAY
描述：	DW025 Dual Output-Series Power Modules: dc-dc Converters 36 Vdc to 75 Vdc Input; Dual Outputs; 25 W DW025双输出系列电源模块： DC-DC转换器36伏至75伏直流输入;双输出; 25瓦转换器电源电路 DC-DC转换器
文件：	总20页 (文件大小：719K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DW025AB-M [VISHAY]

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