GE Industrial Solutions QPW025A0F41H User Manual

Data Sheet
October 5, 2009

QPW025A0F41/QPW025F41-H DC-DC Converter Power Module

36- 75Vdc Input, 3.3Vdc Output and 25A Output Current

Applications

 Wireless Networks

 Optical and Access Network Equipment

 Enterprise Networks

 Latest generation IC’s (DSP, FPGA, ASIC)

and Microprocessor powered applications

Options

 Negative Remote On/Off Logic

 Auto-restart from Output overcurrent/voltage

and Over-temperature Protections

 Heat plate version (-H)

Features

 Delivers up to 25A Output current

 High efficiency – 92.5% at 3.3V full load

 Industry standard Quarter brick footprint

57.9mm x 36.8mm x 12.7mm (with base plate)

(2.28in x 1.45in x 0.5in)

 Low output ripple and noise

 2:1 Input voltage

 Input under voltage protection

 Output overcurrent/voltage protection

 Over-temperature protection

 Tightly regulated output

 Remote sense

 Adjustable output voltage (+10%/ -20%)

 Negative logic, Remote On/Off

 Auto restart after fault protection shutdown

 Wide operating temperature range (-40°C to 85°C)

 Meets the voltage insulation requirements for ETSI

300-132-2 and complies with and is Licensed for
Basic Insulation rating per EN 60950

 CE mark meets the 2006/95/EC directive

†

 UL* 60950-1Recognized, CSA

03 Certified, and VDE

Licensed

 ISO** 9001 and ISO 14001 certified manufacturing

facilities

‡

0805 (EN60950 3rd Edition)

C22.2 No. 60950-1-

§

Description

The QPW025A0F41 is a new open-frame DC/DC power module designed to provide up to 25A output current in an
industry standard quarter brick package. The converter uses synchronous rectification technology and open-frame
packaging techniques to achieve high efficiency reaching 92.5% at 3.3V full load.

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

CSA is a registered trademark of Canadian Standards Associatio n.

†

VDE is a trademark of Verband Deutscher Elektrotechniker e. V.

‡

§ This product is intended for integration into end-user equipment. All of the required procedures of end-use equipment should be followed.
** ISO is a registered trademark of the International Organization of Standards

PDF name:qpw025a0f41_w-h_ds.pdf

Document No: DS05-005 ver. 1.98

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Absolute Maximum Ratings

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

Parameter Device Symbol Min Max Unit

Input Voltage

Continuous All V

Transient (100 ms) V

Operating Ambient Temperature All T

IN

- 100 Vdc

IN, trans

A

- 80 Vdc

-40 85 °C

(see Thermal Considerations section)

Storage Temperature All T

stg

-55 125 °C

I/O Isolation All 1500 Vdc

Electrical Specifications

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

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage All VIN

Maximum Input Current

(VIN=0 to V

IN, max

, Vo = V

o,set

, IO=I

) All I

O, max

IN,max

Quiescent Input Current

Remote on / off disabled (V

= V

IN

) All I

IN, nom

IN, Q

Idle Input Current

Remote on / off enabled (V

= V

IN

, Io = 0 A) All I

IN, nom

IN, Idle

36 48 75

- 2.9

- 5

- 60 -

Vdc

Adc

mA

mA

Inrush Transient All I2t - 1 A2s

Input Reflected Ripple Current, peak-to-peak
(5Hz to 20MHz, 12μH source impedance;
T

25oC, C

a

= TBD)

in

All - 16 - mAp-p

Input Ripple Rejection (100 - 120Hz) All - 60 - dB

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

This power module can be used in a wide variety of applications, ranging from simple standalone operation to being
part of complex power architecture. To preserve maximum flexibility, internal fusing is not included; however, to
achieve maximum safety and system protection, always use an input line fuse. The safety agencies require a fast­acting fuse with a maximum rating of 6A (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 sheet for further information.

LINEAGE POWER 2

Data Sheet

A

)

October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Electrical Specifications (continued)

Parameter Symbol Min Typ Max Unit

Output Voltage Set-point V

(VIN=V

IN,nom

, IO=I

O, max

, T

=25°C)

ref

Output Voltage V

(Over all operating input voltage, resistive load,
and temperature conditions until end of life)

O, set

O

3.24 3.3 3.36 % V

-1.6 +1.6 % V

O, set

O, set

3.2 - 3.4 % VO

Output Regulation

Line (V

= V

IN

IN, min

Load (IO = I

O, min

Temperature (T

to V

to I

ref =TA, min

) ⎯ 0.05 0.2 % V

IN, max

) ⎯ 0.05 0.2 % V

O, max

to T

)

A, max

⎯

0.15 0.50

% V

O, nom

O, nom

O, nom

Output Ripple and Noise on nominal output

(V

IN =VIN, nom

C

out

RMS (5Hz to 20MHz bandwidth)

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

External Capacitance C

Output Current I

Output Current Limit Inception (Hiccup Mode)
(V

= 90% V

o

Output Short-Circuit Current I

VO ≤ 250 mV @ 25o C

and IO = I

O, min

to I

,

O, max

= 1μF ceramic // 10μF Tantalum capacitor)

o, set

⎯

⎯

O

o

I

)

O, lim

O, s/c

0

0 25 A dc

105 120 130

⎯

10 20

45 60

⎯

10000 μF

130 150 % I

mV

mV

% I

rms

pk-pk

o, max

o, max

Efficiency

VIN= 48V, TA=25°C, IO= I

Switching Frequency f

A η

O, max

⎯

sw

⎯

92.5

300

⎯
⎯

%

KHz

Dynamic Load Response

(dIO/dt=0.1A/μs; VIN=VIN,

Load change from IO = 50% to 75% of I

; TA=25°C)

nom

O, max

Peak Deviation V

Settling Time (VO<10% peak deviation)

Load change from IO = 50% to 25% of I

,

O, max

Peak Deviation V

Settling Time (VO<10% peak deviation)

pk

t

s

pk

t

s

⎯
⎯

⎯
⎯

5

150

5

150

⎯
⎯ μs

⎯
⎯ μs

% V

% V

O

O

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance

Isolation Resistance

C

ISO

R

ISO

⎯

10

2700

⎯ ⎯

⎯

pF

MΩ

General Specifications

Parameter Symbol Min Typ Max Unit

Calculated Reliability based upon Telcordia SR­332, Issue 2; Method I Case 3 (I

=40°C, airflow = 200 lfm, 90% confidence

T

= 80% of I

O

O, max

Weight

MTBF

,

FIT

⎯

2,808,445

356

31 (1.1)

⎯

Hours

109/Hours

g (oz.)

LINEAGE POWER 3

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Feature Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature
conditions. See Feature Descriptions for additional information.

Parameter Symbol Min Typ Max Unit

On/Off Signal interface
(VI = VI,min to VI, max; Open collector or equivalent

Compatible, signal referenced to VI (-) terminal

Logic High (Module ON)

Input High Voltage VIH 7 ― 15 V

Input High Current IIH ― ― 50 μA

Logic Low (Module OFF)

Input Low Voltage VIL 0 ― 1.2 V

Input Low Current IIL ― ― 1 mA

Turn-On Delay and Rise Times

(IO=80% I

O, max , VIN=VIN, nom, TA

= 25 oC)

Case 1: On/Off input is set to Logic High (Module ON)
and then input power is applied (delay from instant at
which V

IN

= V

until Vo=10% of Vo,set)

IN, min

― 5 ― msec

T

delay

Case 2: Input power is applied for at least one second
and then the On/Off input is set to logic high (delay from
instant at which Von/Off=0.9V until Vo=10% of Vo, set)

Output voltage Rise time (time for Vo to rise from 10% of
Vo, set to 90% of Vo, set)

T

― 2.5 ― msec

delay

T

rise

Output Voltage Remote Sense

Output voltage overshoot – Startup ―

IO= 80% of I

Over temperature Protection

(See Thermal Considerations section)

Input Undervoltage Lockout V

; TA = 25oC

O, max

T

ref

UVLO

Turn-on Threshold

Turn-off Threshold

Hysteresis

Output voltage adjustment range(TRIM)

Over voltage protection

― 4 ― msec

― ―

⎯

⎯

30 31.5

3

80

3.8

115

34.5

⎯

⎯

10 % V

1

% V

⎯

36
⎯

110

% V

4.6

°C

Vdc

O, set

O, set

V

V

O, set

LINEAGE POWER 4

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Characteristic Curves

The following figures provide typical characteristics for QPW025A0F41/QPW025A0F41-H at 25O C

3

2.5

2

1.5

1

0.5

INPUT CURRENT,(A)

0

30 40 50 60 70

Io = 0.0A

Io = 12.5A

INPUT VOLTAGE, V

Io = 25.0A

(V)

IN

Figure 1. Typical Start-Up (Input Current)
characteristics at room temperature.

95

90

85

80

75

EFFICIENCY (%)

70

0 5 10 15 20 25

Vin = 36V

Vin = 48V

OUTPUT CURRENT, Io (A)

Figure 2. Converter Efficiency Vs Load at V

(V) (1V/div)

o

(V) (5V/div) V

On/Off

ON/OFF VOLTAGE OUTPUT VOLTAGE

V

TIME, t (2 ms/div)

Figure 4. Typical Start-Up Characteristics from Remote
ON/OFF.

Vin = 75V

(V) (200mV/div)

O,

(A) (5A/div) V

O

I

OUTPUT CURRENT OUTPUT VOLTAGE

= 3.3 V. Figure 5. Transient Response to Dynamic Load Change

o

TIME, t (100μs/div)

from 50% to 25% to 50% of full load current.

(V) (200mV/div)

O

(V) (20mV/div)

O

OUTPUT VOLTAGE

(A) (5A/div) V

O

I

V

TIME, t (2μs/div)

Figure 3. Typical Output Ripple and Noise at Vin
=48Vdc.

OUTPUT CURRENT OUTPUT VOLTAGE

TIME, t (100μs/div)

Figure 6. Transient Response to Dynamic Load Change
from 75% to 50 % to 75% of full load current.

LINEAGE POWER 5

Data Sheet

Y

V

CO

S

October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Test Configurations

TO OSCILLOSCOPE

CURRENT

TEST

L

12 µH

S

220 µF

C

BATTER

Note: Input reflected-ripple current is measured with the simulated
source inductance of 1uH. Capacitor Cs offsets possible battery
impedance. Current is measured at the input of the module

ESR < 0.1 W
@ 20 °C, 100 kHz

Figure 7. Input Reflected Ripple Current Test Setup.

PPER STRIP

VO(+)

1.0 µF

V

O

(–)

Note: Use a 10uF tantalum and a 1uF ceramic capacitor. Scope
measurement should be made using BNC socket. Position the load
between 51 mm and 76mm (2 in. and 3 in.) from the module

10 µF

GROUND PLANE

Figure 8. Output Ripple and Noise Test Setup.

SENSE(+)

(–)

I

V

O

V

O

SE NS E( –)

(+ )

SUP P LY

CONTACT

RESISTANCE

VI(+)

I

I

V

Figure 9. Output Voltage and Efficiency Test Setup.

. I

V

O

Efficiency

=

η

VIN. I

O

IN

PROBE

33 µF

ESR < 0.7 W

@ 100 kHz

SCOPE

CO NT ACT AND

DISTRIBUTION LOSSE

I

O

(–)

x 100 %

V

V

RESISTI

LOAD

LOAD

I

(+)

I

(-)

Design Considerations

Input Source Impedance

The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the power module.
For the test configuration in Figure 7, a 33 µF
electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted
close to the power module helps ensure stability of the
unit. Consult the factory for further application
guidelines

.

Output Capacitance

High output current transient rate of change (high di/dt)
loads may require high values of output capacitance to
supply the instantaneous energy requirement to the
load. To minimize the output voltage transient drop
during this transient, low E.S.R. (equivalent series
resistance) capacitors may be required, since a high
E.S.R. will produce a correspondingly higher voltage
drop during the current transient.

Output capacitance and load impedance interact with
the power module’s output voltage regulation control
system and may produce an ’unstable’ output condition
for the required values of capacitance and E.S.R.
Minimum and maximum values of output capacitance
and of the capacitor’s associated E.S.R. may be
dictated, depending on the module’s control system.

The process of determining the acceptable values of
capacitance and E.S.R. is complex and is load­dependant. Lineage Power provides Web-based tools to
assist the power module end-user in appraising and
adjusting the effect of various load conditions and output
capacitances on specific power modules for various
load conditions

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., UL60950-1, CSA C22.2 No. 60950-1-03, EN60950­1 and VDE 0805:2001-12.

For end products connected to –48V dc, or –60Vdc
nominal DC MAINS (i.e. central office dc battery plant),
no further fault testing is required. For all input voltages,
other than DC MAINS, where the input voltage is less
than 60V dc, if the input meets all of the requirements
for SELV, then:

 The output may be considered SELV. Output

voltages will remain within SELV limits even with
internally-generated non-SELV voltages. Single

LINEAGE POWER 6

Data Sheet

D

October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

component failure and fault tests were performed in
the power converters.

 One pole of the input and one pole of the output are

to be grounded, or both circuits are to be kept
floating, to maintain the output voltage to ground
voltage within ELV or SELV limits

.

For all input sources, other than DC MAINS, where the
input voltage is between 60 and 75V dc (Classified as
TNV-2 in Europe), the following must be meet, if the
converter’s output is to be evaluated for SELV:

 The input source is to be provided with reinforced

insulation from any hazardous voltage, including the
ac mains.

 One Vi pin and one Vo pin are to be reliably earthed,

or both the input and output pins are to be kept
floating.

 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.

The power module has ELV (extra-low voltage) outputs
when all inputs are ELV.

All flammable materials used in the manufacturing of
these modules are rated 94V-0, or tested to the
UL60950 A.2 for reduced thickness.

The input to these units is to be provided with a
maximum 6A fast-acting (or time-delay) fuse in the
unearthed lead.

Feature Descriptions

Remote On/Off

Two remote On/Off logic options are available. Positive
logic remote On/Off turns the module ON during a logic­high voltage on the remote On/Off pin, and turns the
module OFF during a logic-low. Negative logic remote
On/Off turns the module OFF during a logic-high and
turns the module ON during logic-low. Negative logic is
specified by suffix “1” at the end of the device code.

To turn the power module on and off, the user must
supply a switch to control the voltage between the
ON/OFF pin and the V
may be an open collector or equivalent (see Figure 10).
A logic-low is V

on/off

during a logic low is 1 mA. The switch should maintain a
logic-low voltage while sinking 1 mA.

During a logic-high, the maximum Von/off generated by
the power module is 15 V. The maximum allowable
leakage current of the switch is 50 µA. If not using the
remote on/off feature, do one of the following:

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

For negative logic, short the ON/OFF pin to V

I

on/off

+

V

on/off

–

Figure 10. Circuit configuration for using Remote
On/Off Implementatio n.

Overcurrent Protection

To provide protection in a fault (output overload) condi­tion, the module is equipped with internal current-limiting
circuitry, and can endure current limiting continuously.
At the instance of current-limit inception, the output
current begins to tail-out. When an overcurrent
condition exists beyond a few seconds, the module
enters a “hiccup” mode of operation, whereby it shuts
down and automatically attempts to restart.. While the
fault condition exists, the module will remain in this
hiccup mode, and can remain in this mode until the fault
is cleared. The unit

(–) terminal (V

IN

). The switch

on/Off

= 0 V to 1.2V. The maximum Ion/off

(–).

IN

ON/OFF

SENSE(+)

V

O

(+)

O

(–)

V

VI(-)

I

(+)

V

SENSE(–)

LOA

LINEAGE POWER 7

Data Sheet

E

October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Feature Descriptions (continued)

operates normally once the output current is reduced
back into its specified range.

Input Undervoltage Lockout

At input voltages below the input undervoltage lockout
limit, the module operation is disabled. The module will
begin to operate at an input voltage between the
undervoltage lockout limit and the minimum operating
input voltage.

Overtemperature Protection

To provide over temperature protection in a fault
condition, the unit relies upon the thermal protection
feature of the controller IC. The unit will shut down if the
thermal reference point T
maximum temperature threshold, but the thermal
shutdown is not intended as a guarantee that the unit
will survive temperatures beyond its rating. The module
will automatically restart after it cools down.

Over Voltage Protection

The output overvoltage protection clamp consists of
control circuitry, independent of the primary regulation
loop, which monitors the voltage on the output
terminals. This control loop has a higher voltage set
point than the primary loop (See the overvoltage clamp
values in the Feature Specifications). In a fault
condition, the overvoltage clamp ensures that the output
voltage does not exceed V
redundant voltage-control that reduces the risk of output
overvoltage.

Remote sense

Remote sense minimizes the effects of distribution
losses by regulating the voltage at the remote-sense
connections (See Figure 11). The voltage between the
remote-sense pins and the output terminals must not
exceed the output voltage sense range given in the
Feature Specifications table:

[V

(+) – VO(–)] – [SENSE(+) – SENSE(–)] ≤ 10% of

O

V

O,rated

The voltage between the V
not exceed the minimum output overvoltage shutdown
value indicated in the Feature Specifications table. This
limit includes any increase in voltage due to remote­sense compensation and output voltage setpoint
adjustment (trim) (see Figure 11). If not using the
remote-sense feature to regulate the output at the point
of load, then connect SENSE(+) to V
to V

(–) at the module.

O

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

, exceeds the specified

ref

o, clamp(max)

(+) and V

O

. This provides a

(–) terminals must

O

(+) and SENSE(–)

O

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 (Maximum rated power = V

o,set

x I

o,max

).

SENSE(+)

SENSE(–)

V

I

(+)

SUPPLY

CONTACT

RESISTANCE

VO(+)

I

I

V

I

(-)

O

V

I

O

(–)

CONTACT AND

DISTRIBUTION LOSS

LOAD

Figure 11. Circuit Configuration t o prog ram outp u t
voltage using external resistor.

Output Voltage Programming

Trimming 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. A resistor placed between the Trim pin
and Sense (+) increases the output voltage and a
resistor placed between the Trim pin and Sense (-)
decreases the output voltage. Figure 12 shows the
circuit configuration using an external resistor. The trim
resistor should be positioned close to the module. If the
trim pin is not used then the pin shall be left open

VIN(+)

ON/OFF

VIN(-)

Figure 12. Circuit Configuration to program output
voltage using an external resistor.

The following equations determine the required external
resistor value to obtain a percentage output voltage
change of Δ%.

To decrease output voltage set point:

VO(+)

SENSE (+)

TRIM

SENSE (-)

VO(-)

⎛

=− KR downtrim 2.10

⎜
⎝

510

Δ

.

R

trim-up

LOAD

R

trim-down

⎞

−

%

Ω

⎟
⎠

LINEAGE POWER 8

Data Sheet

A

W

October 5, 2009

Where,

V

= Desired output voltage set point (V).

desired

To increase the output voltage set point

⎛

uptrim

=− K

R

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.

⎜
⎝

,

desirednomo

VV

=Δ

V

nomo

,

−

,

nomo

V

()

Δ+

%100**1.5

Δ

%*225.1

×

510

−

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

100%

⎞

−

Δ

%

Ω

2.10

⎟
⎠

Thermal Considerations

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-dissipation components are mounted on the
topside of the module. Heat is removed by conduction,
convection and radiation to the surrounding
environment. Proper cooling can be verified by
measuring the temperature of selected components on
the topside of the power module. Peak temperature can
occur at any to these positions indicated in the following
figure 14.

ind Tunnel

25.4_

(1.0)

PWBs

x

6.55_

(0.258)

76.2_
(3.0)

Power Module

Probe Location
for measuring
airflow and
ambient
temperature

ir

flow

Figure 13. Thermal Test Set up.

The temperature at any one of these locations should
not exceed 115 °C to ensure reliable operation of the
power module. The output power of the module should
not exceed the rated power for the module as listed in
the Ordering Information table.

Airflow

Thermocouple Location T

Figure 14. T

LINEAGE POWER 9

Temperature measurement location.

ref

ref

=115

o

C

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board­Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.

Heat Transfer via Convection

Increased airflow over the module enhances the heat
transfer via convection. Thermal derating curves
showing the maximum output current that can be
delivered by the module versus local ambient
temperature (T
ft./min) and 1.0 m/s (200 ft./min) are shown in Fig. 15 for
the bare module and in Fig. 16 for the module with
baseplate.

Note that the natural convection condition was
measured at 0.05m/s to 0.1m/s (10ft./min. to 20ft./min.);
however, systems in which these power modules may
be used typically generate natural convection airflow
rates of 0.3m/s (60 ft./min.) due to other heat dissipating
components in the system.

30

25

20

) for natural convection, 0.5m/s (100

A

15

10

NC

0.5 m/s

(100 lfm)

1.0 m/s

(200 lfm)

5

0

20 30 40 50 60 70 80 90

OUTPUT CURRENT (A)

TEMPERATURE (OC)

Figure 15. Thermal Derating Curves for the
QPW025A0F41 module at 48Vin. Airflow is in the
transverse direction (Vin− to Vin+).

30

25

20

15

10

5

0

20 30 40 50 60 70 80 90

OUTPUT CURRENT (A)

TEMPERATURE (OC)

NC

0.5 m/s

(100 lfm)

Figure 16. Thermal Derating Curves for the
QPW025A0F41-H baseplate module at 48Vin. Airflow
is in the transverse direction (Vin− to Vin+).

LINEAGE POWER 10

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Mechanical Outline

Dimensions are in millimeters and [inches].
Tolerances: x.x mm ± 0.5 mm [x.xx in. ± 0.02 in.] (unless otherwise indicated)
x.xx mm ± 0.25 mm [x.xxx in ± 0.010 in.]

TOP VIEW

SIDE

VIEW

BOTTOM

VIEW

† -Optional pin

LINEAGE POWER 11

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Mechanical Outline for module with base plate.

Dimensions are in millimeters and [inches].
Tolerances: x.x mm ± 0.5 mm [x.xx in. ± 0.02 in.] (unless otherwise indicated)
x.xx mm ± 0.25 mm [x.xxx in ± 0.010 in.]

TOP VIEW

SIDE VIEW

BOTTOM

VIEW

† -Optional pin

LINEAGE POWER 12

Data Sheet
October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Recommended Pad Layout

Dimensions are in millimeters and (inches).
Tolerances: x.x mm ± 0.5 mm (x.xx in. ± 0.02 in.) (unless otherwise indicated)
x.xx mm ± 0.25 mm (x.xxx in ± 0.010 in.)

1.57 (0.062) DIA PIN, 2 PLCS

1.02 (0.040)DIA PIN, 7 PLCS

†

† - Option

LINEAGE POWER 13

Data Sheet

a

©

October 5, 2009

QPW025A0F41/QPW025A0F41-H DC-DC Power Module

36-75Vdc Input; 3.3Vdc Output Voltage; 25A Output Current

Ordering Information

Please contact your Lineage Power Sales Representative for pricing, availability and optional features.

Table 3. Device Code

Input Voltage

Output

Voltage

36 – 75Vdc 3.3 V 25A 92.5% Through-Hole QPW025A0F41-H 108993572

Table 2. Device Options

Option Device Code Suffix

Negative Logic Remote On/Off 1

Auto-restart after fault shutdown 4

Pin Length: 3.68 mm ± 0.25 mm (0.145 in. ± 0.010 in.) 6

Case pin (only available with –H option) 7

Base plate version for heat sink attachment -H

Output

Current

Efficiency Connector

Type

Product codes Comcodes

Asia-Pacific Headquarters

Tel: + 65 6593 7211

World Wide Headquarters
Lineage Power Corporation

601 Shil oh Roa d, Plano, TX 75074, USA
[phone]
(Outsi de U.S.A.: [phone])

www.lineagepower.com
e-mail: [e-mail]

Linea ge Power res erves th e right to make change s to the prod uct(s) or i nformat ion contained herein without not ice. No l iability is assum ed as a res ult of their u se or

pplication . No righ ts under any patent accompany the sal e of an y such produc t(s) or informati on.

Linea ge Power D C-DC pro ducts are p rotected unde r various pa tents. Information on these pa tents is av ailable at www. lineagepo wer.com/patents.

2009 Line age Power Corporation, (Plan o, Texas) All Inte rnation al Rights Reserved.

Europe, Middle-East and Africa Headquarters

Tel: + 49 898 780 672 80

India Headquarters

Tel: + 91 80 2841163 3

Document No: DS05-005 ver. 1.98

PDF name:qpw025a0f41_w-h_ds.pdf