Data Sheet
March 27, 2008
QW010/015/020-H Series Power Modules with Baseplate;
36
–
75Vdc In
p
ut
,
1.0 - 5.0Vdc Out
p
ut
;
10A to 20A Out
p
ut Current
Document No: DS03-102 ver. 1.3
PDF name: qw015_series_h_ds.pd
Description
The QW-H series dc-dc converters are same as
QW series with baseplate mounted on topside,
which accommodate for standard quarter brick
heatsink attachment. The QW-H series allow
customer to operate the module in an extreme
thermal environment with attachment of
heatsink/cold-plate for proper cooling of internal
component to heighten reliable and consistent
operation. For additional technical data, consult
QW010/0150/020 series data sheet.
QW010/015/020 Series Brick Power Modules:
36 - 75Vdc Input; 1.0Vdc to 5Vdc Output; 10A to 20A Output current
Data Sheet
March 27, 2008
LINEAGE POWER 2
Mechanical Outline Diagram
Dimensions are in inches.
Tolerances: x.xx in. ± 0.02 in. [unless otherwise indicated]
x.xxx in ± 0.010 in.
*
* Ground pin is optional
QW010/015/020 Series Brick Power Modules:
36 - 75Vdc Input; 1.0Vdc to 5Vdc Output; 10A to 20A Output current
Data Sheet
March 27, 2008
LINEAGE POWER 3
Thermal considerations
The baseplate option (-H) power modules are
constructed with baseplate on topside of the open frame
power module. The baseplate includes quarter brick
through-threaded, M3 x 0.5 mounting hole pattern, 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.) during heat sink assembly. This module operates in a
variety of thermal environments; however, sufficient
cooling should be provided to help ensure reliable
operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of the
module will result in an increase in reliability. The
thermal data presented here is based on physical
measurements taken in a wind tunnel.
Heat-dissipating components are mounted on the top-
side of the module and coupled to the baseplate with
thermal gap material. Heat is removed by conduction,
convection and radiation to the surrounding environment.
The thermal reference point, Tref . used for the derating
curves is shown in Figure 1. For reliable operation Tref .
temperature should not exceed 118°C.
The output power of the module should not exceed the
rated power for the module as listed in the Ordering
Information table. Although the maximum Tref
temperature of the power modules is 118°C, users can
limit this temperature to a lower value for extremely high
reliability.
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
Tref AirFlow
Figure 1. Tref Temperature Measurement
Location
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Following derating figures
shows the maximum output current that can be delivered
by each module in the respective orientation without
exceeding the maximum Tref temperature versus local
ambient temperature (TA) for natural convection through
1m/s (200 ft./min).
Note that the natural convection condition was
measured at 0.05 m/s to 0.1 m/s (10ft./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 dissipating components in the
system.
QW010/015/020 Series Brick Power Modules:
36 - 75Vdc Input; 1.0Vdc to 5Vdc Output; 10A to 20A Output current
Data Sheet
March 27, 2008
LINEAGE POWER 4
Thermal considerations (continued)
0
2
4
6
8
10
12
20 30 40 50 60 70 80 90
200 LFM
10 0 LF M
NC
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 2. Derating curves for QW010A0A1-H (Vo =
5.0) in transverse orientation (Vin = 48Vdc)
0
2
4
6
8
10
12
14
16
20 30 40 50 60 70 80 90
200 LFM
10 0 LF M
NC
OUTPUT CURRENT, IO (A)
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 3. Derating curves for QW015A0F1-H (Vo =
3.3V) in transverse orientation (Vin = 48Vdc)
QW010/015/020 Series Brick Power Modules:
36 - 75Vdc Input; 1.0Vdc to 5Vdc Output; 10A to 20A Output current
Data Sheet
March 27, 2008
Document No: DS03-102 ver. 1.3
PDF name: qw015_series_h_ds.pd
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 1. Device Codes
Input Voltage Output
Voltage
Output
Current
Efficiency Connector
Type Product codes Comcodes
48V (36-75Vdc) 5.0 10A 92 % Through hole QW010A0A1-H 108979477
48V (36-75Vdc) 3.3V 15A 91 % Through hole QW015A0F-H 108985177
48V (36-75Vdc) 2.5V 20A 89 % Through hole QW020A0G71-H 108987082
Table 2. Device Options
Option Suffix
Negative remote on/off logic 1
Case ground pin 7
Basic Insulation -B
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+1-800-526-7819
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www.lineagepower.com
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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.
© 2008 Lineage Power Corporation, (Mesquite, Texas) All International Rights Reserved.
