LW020A Datasheet LW020A, LW020A1, LW020A7 | P1-P3

Data Sheet

April 2008

LW020 Single-Output-Series Power Modules:

36 Vdc to 75 Vdc Inputs; 20 W

The LW020 Single-Output-Series Power Modules use

advanced, surface-mount technology and deliver high-qual-

ity, compact, dc-dc conversion at an economical price.

Applications

n Distributed power architectures

n Communication equipment

n Computer equipment

Options

n Choice of remote on/off configuration

n Case ground pin

n Synchronization

n Short pins: 2.79 mm ± 0.25 mm

(0.110 in. ± 0.010 in.)

n Short pins: 3.68 mm ± 0.25 mm

(0.145 in. ± 0.010 in.)

Features

n Low profile: 9.91 mm (0.390 in.) with 0.38 mm

(0.015 in.) standoffs, 9.53 mm (0.375 in.) with

standoffs recessed

n Wide input voltage range: 36 Vdc to 75 Vdc

n Overcurrent protection

n Output overvoltage protection

n Input-to-output isolation: 1500 Vdc

n Operating case temperature range: –40 °C to

+110 °C

n Remote on/off

n Output voltage adjustment: 90% to 110% of VO, nom

n JQA Certified to EN60950

n UL* 1950 Recognized, CSA

†

C22.2 No. 950-95

Certified, VDE

‡

0805 (EN60950, IEC950) Licensed

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

directives

n Within FCC Class A radiated limits

Description

The LW020 Single-Output-Series Power Modules are

low-profile dc-dc converters that operate over an

input voltage range of 36 Vdc to 75 Vdc and provide

precisely regulated outputs. The outputs are isolated

from the input, allowing versatile polarity configura-

tions and grounding connections. Built-in filtering for

both input and output minimizes the need for external

filtering. The modules have a maximum power rating

of 20 W at a typical full-load efficiency of up to 85%.

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

† CSA is a registered trademark of Canadian Standards Associa-

tion.

‡ 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-

ment should be followed. (The CE mark is placed on selected

products.)

2 Lineage Power

Data Sheet

April 2008

36 Vdc to 75 Vdc Inputs; 20 W

LW020 Single-Output-Series Power Modules:

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the devices. These are

absolute stress ratings only. Functional operation of the devices 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.

* Maximum case temperature varies based on power dissipation. See derating curve, Figure 16, for details.

Electrical Specifications

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

conditions.

Table 1. Input Specifications

Fusing Considerations

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

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

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

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

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

Parameter Symbol Min Max Unit

Input Voltage:

Continuous

Transient (100 ms)

VI, trans

100

Vdc

Operating Case Temperature

(See Thermal Considerations section.)

C –40 110* °C

Storage Temperature T

stg –40 120 °C

I/O Isolation Voltage — — 1500 Vdc

Parameter Symbol Min Typ Max Unit

Operating Input Voltage V

I 36 48 75 Vdc

Maximum Input Current

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

I, max ——1.1A

Inrush Transient i

t——0.1A

Input Reflected-ripple Current

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

C = 25 °C; see Figure 11 and Design Considerations

section.)

I —3—mAp-p

Input Ripple Rejection (100 Hz—120 Hz) — — 60 — dB

Lineage Power 3

Data Sheet

April 2008

36 Vdc to 75 Vdc Inputs; 20 W

LW020 Single-Output-Series Power Modules:

Electrical Specifications (continued)

Table 2. Output Specifications

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point

I = 48 V; IO = IO, max; TC = 25 °C)

LW020G

LW020F

LW020A

LW020B

LW020C

O, set

VO, set

2.46

3.25

4.92

11.81

14.76

2.5

3.3

5.0

12.0

15.0

2.54

3.35

5.08

12.19

15.24

Vdc

Output Voltage

(Over all line, load, and temperature

conditions until end of life; see Figure 13.)

LW020G

LW020F

LW020A

LW020B

LW020C

2.4

3.20

4.85

11.64

14.55

—

2.6

3.40

5.15

12.36

15.45

Vdc

Output Regulation:

Line (V

I = 36 V to 75 V)

Load (I

O = IO, min to IO, max)

Temperature (T

C = –40 °C to +100 °C)

All

—

0.01

0.05

0.5

0.1

0.2

1.0

%VO

Output Ripple and Noise Voltage

(See Figure 12.):

RMS

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

LW020A, F,

LW020B, C

LW020A, F,

LW020B, C

—

100

150

mVrms

mVp-p

Output Current

(At I

O < IO, min, the modules may exceed

output ripple specifications.)

LW020A, F,

LW020B

LW020C

0.4

0.17

0.13

—

4.0

1.67

1.33

Output Current-limit Inception

O = 90% x VO, set; see Figure 2.)

All I

O 103 — 150 %IO, max

Output Short-circuit Current

O = 250 mV)

LW020C

LW020B

LW020A, F,

—

150

250

220

200

%IO, max

Efficiency

I, nom; IO = IO, max; TC = 25 °C; see Figures

3—7 and 13.)

LW020G

LW020F

LW020A

LW020B

LW020C

—

Switching Frequency All — — 256 — kHz

Dynamic Response

(ýI

O/ýt = 1 A/10 µs, VI = VI, nom, TA = 25 °C):

Load Change from I

O = 50% to 75% of

O, max:

Peak Deviation

Settling Time (V

O < 10% peak

deviation)

Load Change from I

O = 50% to 25% of

O, max:

Peak Deviation

Settling Time (V

O < 10% peak

deviation)

All

—

1.0

—

O, set

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P16

LW020A

Mfr. #:

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LW020A

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