LW025F8

LW025F8 Datasheet

LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W

Part	Datasheet
LW025F8	LW025F8 (pdf)

Related Parts	Information
LW025A1	LW025A1
LW025F871	LW025F871

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Advance Data Sheet April 2008 LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W The LW025 Single-Output-Series Power Modules use advanced, surface-mount technology and deliver high-quality, compact, dc-dc conversion at an economical price. Options n Choice of on/off configuration n Case ground pin n Synchronization n Short pins mm ± mm in. ± in. n Short pins mm ± mm in. ± in. n Low profile mm in. with mm in. standoffs, mm in. with standoffs recessed n Wide input voltage range 36 Vdc to 75 Vdc n Input-to-output isolation n Operating case temperature range °C to +110 °C n Metal case n Overcurrent protection n Remote on/off n Output voltage adjust 90% to 110% of VO, nom n Output overvoltage protection 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 n Within FCC and EN55022 CISPR 22 Class A radiated limits n Distributed power architectures n Telecommunications The LW025 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 output is isolated from the input, allowing versatile polarity configurations and grounding connections. The module has a maximum power rating of 25 W at a typical full-load efficiency of The power modules feature remote on/off and output voltage adjustments of 90% to 110% of the nominal output voltage. Built-in filtering for both input and output minimizes the need for external filtering. * UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be followed. The CE mark is placed on selected products. LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W Advance Data Sheet April 2008 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. Parameter Input Voltage: Continuous Transient 100 ms Operating Case Temperature See Figure Storage Temperature I/O Isolation Voltage VI, trans Tstg 80 100 110* 120 1500 * Maximum case temperature varies based on power dissipation. See derating curves, Figures for details. Unit Vdc V °C °C Electrical Specifications Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. Table Input Specifications Parameter Symbol Min Unit Operating Input Voltage Maximum Input Current II, max VI = 0 V to VI, max IO = IO, max see Figures 1 and Inrush Transient Note that the view in Figure 14 is of the metal surface of the pin locations shown are for reference. The temperature at this location should not exceed the maximum case temperature indicated in the derating curve shown in Figure The output power of the module should not exceed the rated power for the module as listed in the Ordering Information table. Heat Transfer Thermal Considerations Introduction The LW025 Single-Output-Series 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 thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the case temperature. Peak case temperature TC occurs at the position indicated in Figure TRIM ON/OFF - LW025A871 - DC-DC CONVERTER IN:DC 36-75V, 1.20A + OUT:DC 5.0V,5.0A Increasing airflow over the module enhances the heat transfer via convection. Figure 16 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 600 ft./min. . Systems in which these power modules may be used typically generate natural convection airflow rates of 60 ft./min. due to other heat-dissipating components in the system. Therefore, the natural convection condition represents airflow rates of up to 60 ft./min. . Use of Figure 16 is shown in the following example. Example What is the minimum airflow necessary for a LW025A operating at VI = 75 V, an output current of A, and a maximum ambient temperature of 85 °C? Solution Given VI = 75 V, IO = A, TA = 85 °C Determine PD Figure 18 PD = W Determine airflow Figure 16 v = 200 ft./min. MADE INUSA CASE PIN OPTIONAL 8-1265 C .c Note Dimensions are in millimeters and inches . Pin locations are for reference only. Figure Case Temperature Measurement Location Lineage Power Advance Data Sheet April 2008 LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W Thermal Considerations continued Heat Transfer continued POWER DISSIPATION PD W POWER DISSIPATION PD W 3 MAX CASE TEMPURATURE ms -1 600 ft./min. ms -1 400 ft./min. ms -1 200 ft./min. NATURAL CONVECTION 0 40 50 60 70 80 90 100 110 MAX AMBIENT TEMPERATURE, TA 8-2477 C Note Conversion factor for linear feet per minute to meters per second 200 ft./min. = 1 Figure LW025F Forced Convection Power Derating Either Orientation Ordering Information Table Device Codes Input Voltage 48 V 48 V Output Voltage V 5V Output Power W 25 W Device Code LW025F LW025A Comcode 108448234 Optional features may be ordered using the device code suffixes shown below. To order more than one option, list suffixes in numerically descending order. Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability. Table Option Codes Option Short pins mm ± mm in. ± in. Case ground pin Short pins mm ± mm in. ± in. Synchronization Negative logic on/off Device Code Suffix 8 Lineage Power Advance Data Sheet April 2008 Notes LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W Lineage Power LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W Advance Data Sheet April 2008 A sia-Pacific Head qu art ers T el +65 6 41 6 4283 World W ide Headq u arters Lin eag e Po wer Co rp or atio n 30 00 Sk yline D riv e, Mes quite, T X 75149, U SA +1-800-526-7819 Outs id e U .S.A +1- 97 2-2 84 -2626 ag ep ower.co m e-m ail tech sup lin ea gep ower.co m Eu ro pe, M id dle-East an d Afr ic a He ad qu arters Tel +49 8 9 6089 286 Ind ia Head qu arters Tel +91 8 0 28411633 Lineage Power reserves the right to make changes to the produc t s or information contained herein without notice. No liability is ass umed as a res ult of their use or applic ation. No rights under any patent acc om pany the sale of any s uc h pr oduct s or information. 2008 Lineage Power Corpor ation, Mesquite, Texas All International Rights Res er ved. April 2008 DS99-052EPS

PDF Datasheet Preview

Advance Data Sheet April 2008

LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W

The LW025 Single-Output-Series Power Modules use advanced, surface-mount technology and deliver high-quality, compact, dc-dc conversion at an economical price.

Options
n Choice of on/off configuration n Case ground pin n Synchronization n Short pins mm ± mm
in. ± in. n Short pins mm ± mm
in. ± in.
n Low profile mm in. with mm in. standoffs, mm in. with standoffs recessed
n Wide input voltage range 36 Vdc to 75 Vdc n Input-to-output isolation n Operating case temperature range °C to
+110 °C n Metal case n Overcurrent protection n Remote on/off n Output voltage adjust 90% to 110% of VO, nom n Output overvoltage protection 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
n Within FCC and EN55022 CISPR 22 Class A
radiated limits
n Distributed power architectures n Telecommunications

The LW025 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 output is isolated from the input, allowing versatile polarity configurations and grounding connections. The module has a maximum power rating of 25 W at a typical full-load efficiency of

The power modules feature remote on/off and output voltage adjustments of 90% to 110% of the nominal output voltage. Built-in filtering for both input and output minimizes the need for external filtering.
* UL is a registered trademark of Underwriters Laboratories, Inc. † CSA is a registered trademark of Canadian Standards Association. This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should
be followed. The CE mark is placed on selected products.

LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W

Advance Data Sheet April 2008

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.

Parameter Input Voltage:

Continuous Transient 100 ms Operating Case Temperature See Figure Storage Temperature I/O Isolation Voltage

VI, trans

Tstg
80 100 110* 120 1500
* Maximum case temperature varies based on power dissipation. See derating curves, Figures for details.

Unit

Vdc V °C °C

Electrical Specifications

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

Table Input Specifications

Parameter

Symbol Min

Unit

Operating Input Voltage

Maximum Input Current

II, max

VI = 0 V to VI, max IO = IO, max see Figures 1 and

Inrush Transient
Note that the view in Figure 14 is of the metal surface of the pin locations shown are for reference. The temperature at this location should not exceed the maximum case temperature indicated in the derating curve shown in Figure The output power of the module should not exceed the rated power for the module as listed in the Ordering Information table.

Heat Transfer

Thermal Considerations

Introduction

The LW025 Single-Output-Series 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 thermally coupled to the case. Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be verified by measuring the case temperature. Peak case temperature TC occurs at the position indicated in Figure

TRIM

ON/OFF -

LW025A871
- DC-DC CONVERTER

IN:DC 36-75V, 1.20A
+ OUT:DC 5.0V,5.0A

Increasing airflow over the module enhances the heat transfer via convection. Figure 16 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 600 ft./min. .

Systems in which these power modules may be used typically generate natural convection airflow rates of 60 ft./min. due to other heat-dissipating components in the system. Therefore, the natural convection condition represents airflow rates of up to 60 ft./min. . Use of Figure 16 is shown in the following example.

Example

What is the minimum airflow necessary for a LW025A operating at VI = 75 V, an output current of A, and a maximum ambient temperature of 85 °C?

Solution

Given VI = 75 V, IO = A, TA = 85 °C Determine PD Figure 18 PD = W Determine airflow Figure 16 v = 200 ft./min.

MADE INUSA

CASE PIN OPTIONAL
8-1265 C .c

Note Dimensions are in millimeters and inches . Pin locations are for reference only.

Figure Case Temperature Measurement Location

Lineage Power

Advance Data Sheet April 2008

LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W

Thermal Considerations continued

Heat Transfer continued

POWER DISSIPATION PD W

POWER DISSIPATION PD W
3 MAX CASE

TEMPURATURE
ms -1 600 ft./min.
ms -1 400 ft./min.
ms -1 200 ft./min.

NATURAL

CONVECTION
0 40 50 60 70 80 90 100 110

MAX AMBIENT TEMPERATURE, TA
8-2477 C

Note Conversion factor for linear feet per minute to meters per second 200 ft./min. = 1

Figure LW025F Forced Convection Power Derating Either Orientation
Ordering Information

Table Device Codes

Input Voltage 48 V 48 V

Output Voltage V 5V

Output Power W 25 W

Device Code LW025F LW025A

Comcode 108448234

Optional features may be ordered using the device code suffixes shown below. To order more than one option, list
suffixes in numerically descending order. Please contact your Lineage Power Account Manager or Field Application Engineer for pricing and availability.

Table Option Codes

Option Short pins mm ± mm
in. ± in. Case ground pin

Short pins mm ± mm in. ± in. Synchronization Negative logic on/off

Device Code Suffix 8

Lineage Power

Advance Data Sheet April 2008

Notes

LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W

Lineage Power

LW025 Single-Output-Series Power Modules 36 Vdc to 75 Vdc Inputs 25 W

Advance Data Sheet April 2008

A sia-Pacific Head qu art ers T el +65 6 41 6 4283

World W ide Headq u arters Lin eag e Po wer Co rp or atio n 30 00 Sk yline D riv e, Mes quite, T X 75149, U SA +1-800-526-7819 Outs id e U .S.A +1- 97 2-2 84 -2626 ag ep ower.co m e-m ail tech sup lin ea gep ower.co m

Eu ro pe, M id dle-East an d Afr ic a He ad qu arters Tel +49 8 9 6089 286

Ind ia Head qu arters Tel +91 8 0 28411633

Lineage Power reserves the right to make changes to the produc t s or information contained herein without notice. No liability is ass umed as a res ult of their use or applic ation. No rights under any patent acc om pany the sale of any s uc h pr oduct s or information.
2008 Lineage Power Corpor ation, Mesquite, Texas All International Rights Res er ved.

April 2008 DS99-052EPS

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LW025F8 Datasheet file may be downloaded here without warranties.

Datasheet ID: LW025F8 645708