GE Industrial Solutions QRW025 User Manual

Data Sheet

f

August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36Vdc - 75Vdc Input; 1.2 to 3.3 Vdc Output; 25A

RoHS Compliant

Applications

 Enterprise Networks
 Wireless Networks
 Access and Optical Network Equipment
 Enterprise Networks
 Latest generation IC’s (DSP, FPGA, ASIC) and

Microprocessor-powered applications.

Options

 Positive Remote On/Off logic
 Case ground pin (-H Base plate version)
 Auto restart after fault shutdown

Description

The QRW-series dc-dc converters are a new generation of DC/DC power modules designed for optimum efficiency
and power density. The QRW series provide up to 25A output current in an industry standard quarter brick, which
makes it an ideal choice for small space, high current and low voltage applications. The converter uses synchronous
rectification technology and innovative packaging techniques to achieve high efficiency reaching 91% at 3.3V full
load. Thanks to the ultra high efficiency of this converter, the power dissipation is such that for most applications a
heat sink is not required. In addition, th e QRW- se ries su pport s fu ture mig ra tio n of sem i condu ct o r and
microprocessor supply voltages do wn to 1.0V .

Features

 Compliant to RoHS EU Directive 2002/95/EC (-Z

versions)

 Compliant to ROHS EU Directive 2002/95/EC with

lead solder exemption (non-Z ve rsions)

 Delivers up to 25A output current
 Ultra High efficiency – 91% at 3.3V full load
 Industry standard DOSA Compliant Quarter brick:

57.9 mm x 36.8 mm x 9.5 mm
(2.28 in x 1.45 in x 0.375 in)

 Improved Thermal Performance:

25A at 70ºC at 1m/s (200LFM) for 3.3Vo

 High power density
 Low output ripple and noise
 Low output voltages down to 1V: Supports migration

to future IC and microprocessor supply voltages

 2:1 input voltage
 Remote Sense
 Remote On/Off
 Constant switching frequency
 Output overvoltage and Overcurrent protection
 Overtemperature protection
 Adjustable output voltage (+10% / -20%)
 Meets the voltage isolation requirements for

ETSI 300-132-2 and complies with and is licensed
for Basic Insulation rating per EN60950-1

 UL** 60950-1 Recognised, CSA

1-03 Certified, and VDE

‡

Edition) Licensed

 CE mark meets 2006/95/EC directive
 ISO* 9001 certified manufacturing facilities

†

C22.2 No. 60950-

0805 (IEC60950, 3rd

§

* ISO is a registered trademark of the International Organization of Standards

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

†

CSA is a registered trademark of Canadian Standards Association.

‡

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

§ This product is intended for integration into end-use equipment. All of the required procedures of end-use equipment
should be followed.

PDF name:

QRW025_Series.pd

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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 reliabiltiy.

Parameter Device Symbol Min Max Unit

Input Voltage:Continuous

Transient (100ms)

Operating Ambient Temperature
(See Thermal Considerations section)

Storage Temperature All Tstg –55 125 °C

I/O Isolation Voltage (100% factory Hi-Pot tested)
When using optional case ground pin
(option 7)

All VI

VI, trans

All TA –40 85 °C

— — — 1500

—
—

75

100

700

Vdc
Vdc

Vdc
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 36 48 75 Vdc

Maximum Input Current
(VI = 0 V to 75 V; IO = IO, max)

Inrush Transient All I

Input Reflected Ripple Current, peak-peak
(5 Hz to 20 MHz, 12 µH source impedance
See Test configuration section)

Input Ripple Rejection (120 Hz) All 60 dB

All — — 2.8m n Adc

2

t1A

All 16 mAp-p

2

s

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 stand-alone operation to an integrated
part of a sophisticated 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 normal-blow fuse with a
maximum rating of 10 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.

Lineage Power 2

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Electrical Specifications (continued)

Output Specifications for the QRW025A0P (Vo = 1.2Vdc)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)

Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)

Output Regulation:

Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)

Output Ripple and Noise

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

External Load Capacitance — 25,000 µF

Output Current
(Vo =90% of VO, nom.)

Output Current-limit Inception
(VO = 90% of VO, set)

Output Short-circuit Current (Average)VO = 0.25 V Latched off

Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C

Switching Frequency All fSW — 300 — kHz

Dynamic Response

(ΔIO/Δt = 1 A/10 µs, VI = 48 V, TA = 25 °C); tested
with a 220 µF aluminium and a 1.0 µf ceramic
capacitor across the load.):
Load Change from
IO = 50% to 75% of IO, max:

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

Load Change from IO = 50% to 25%

of IO, max :

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

P Vo 1.18 1.2 1.22 Vdc

P Vo 1.15 — 1.25 Vdc

P—

—
—

P—

PIO0.0—25Adc

P IO, lim — 29 — Adc

η —85— %

—
—
—

—

0.05

0.05
5

—
—

8

200

8

200

0.3

0.3
20

30

100

%, VO, set
%, VO, set

mVrms

mVp-p

mV

mV

µs

mV

µs

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso — 5600 — PF

Isolation Resistance Riso 10 — — MW

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO = 80% of IO, max TA = 40 °C) 1,771,000 Hours

Weight — 37(1.31) — g (oz.)

Lineage Power 3

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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

Remote On/Off Signal Interface*

(VI = 0 V to 75 V; open collector or equivalent compatible; signal
referenced to VI(–) terminal; see Figure 34
and Feature Descriptions.):

Preferred Logic:

Logic Low—Module On
Logic High—Module Off

Optional Logic:

Logic Low—Module Off
Logic High—Module On

Logic Low:

At Ion/off = 1.0 mA
At Von/off = 0.0 V

Logic High:

At Ion/off = 0.0 µA
Leakage Current

Turn-on Time; see Typical Start-up Curve(IO = IO max;

Vo within ±1% of steady state)

Output Voltage Adjustment

(See Feature Descriptions):

Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)

Output Overvoltage Protection VO, ovsd 1.42 — 1.58 V

Overtempera

WuUe Protection (IO = IO, max) Tref1 — 127 — °C

.

Von/off

Ion/off

Von/off

Ion/off

—
—

—

—
—

—
80

0

—
—

—
—

2

—
—

1.2

1.0

15
50

4

10

110

V

mA

V
µA
ms

%VO,rated

%V0,nom

Lineage Power 4

Data Sheet

0

INPUT CURRENT, I

(A)

0

100

OUTPUT CURRENT, IO (A)

TIME, t (1 µs/div)

OUTPUT VOLTA GE, V

(V)

TIME, t, (.2 µs/div)

OUTPUT CURRENT, I

(A)

V)

TIME, t, (.2 µs/div)

)

March 27, 2008

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Characteristic Curves

The following figures provide typical characteristics curves for the QRW025A0P (VO = 1.2 V) module at room temperature (TA
= 25 °C).The figures are identical for both on/off configurations.

1.2

1

I

0.8

0.6

0.4

0.2

0

0 102030405060708

INPUT VOL TA GE, VI (V)

IO = 25A

IO = 12.5A

IO = 2.5A

Figure 1. Input Voltage and Current Characteristics.

90
80
70
60
50
40
30

EFFICIENCY, η (%)

20
10

0

0 5 10 15 20 25 3

VI = 75V
V

I = 48V

V

I = 36V

O (

(50 mV/div)

OUTPUT VOLTAGE, V

O

(5 A/div)

Tested with a 220µF aluminium and a 1.0µF ceramic

capacitor across the load.

Figure 4. Transient Response to Step decrease in

Load from 50% to 25% of Full Load (VI = 48
Vdc).

(V

O

(50 mV/div)

OUTPUT VOLTA GE, V
(A)

O

(5 A/div)

OUTPUT CURRENT, I

Figure 2. Converter Efficiency vs. Output Current.

Figure 5. Transient Response to Step Increase in Load

from 50% to 75% of Full Load (VI = 48 Vdc).

36V, 25A

O

48V, 25A

(20 mV/div)

75V, 25A

0.5

Figure 6. Start-up from Remote On/Off (IO = IO, max).

Figure 3. Output Ripple Voltage (IO = IO, max).

Lineage Power 5

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Electrical Specifications (continued)

Output Specifications for the QRW025AOM (Vo = 1.5Vdc)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)

Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)

Output Regulation:

Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)

Output Ripple and Noise

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

External Load Capacitance — 25,000 µF

Output Current
(Vo =90% of VO, nom.)

Output Current-limit Inception
(VO = 90% of VO, set)

Output Short-circuit Current (Average)VO = 0.25 V Latched off

Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C

Switching Frequency All fSW — 300 — kHz

Dynamic Response

(DIO/Dt = 1 A/10 µs, VI = 48 V, TA = 25 °C); tested
with a 220 µF aluminium and a 1.0 µf ceramic
capacitor across the load.):
Load Change from
IO = 50% to 75% of IO, max:

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

Load Change from IO = 50% to 25%

of IO, max :

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

MVo1.471.51.52Vdc

MVo1.45—1.55Vdc

M—

—
—

M—

MIO0.0—25Adc

M IO, lim — 30 — Adc

η —87— %

—
—
—

—

0.05

0.05
15

—
—

6

200

6

200

0.2

0.2
50

20

100

%, VO, set
%, VO, set

mVrms

mVp-p

mV

mV

µs

mV

µs

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso — 5600 — PF

Isolation Resistance Riso 10 — — MW

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO = 80% of IO, max TA = 40 °C) 1,715,000 Hours

Weight — 37(1.31) — g (oz.)

Lineage Power 6

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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

Remote On/Off Signal Interface*

(VI = 0 V to 75 V; open collector or equivalent compatible; signal
referenced to VI(–) terminal; see Figure 34

and Feature Descriptions.):

Preferred Logic:

Logic Low—Module On
Logic High—Module Off

Optional Logic:

Logic Low—Module Off
Logic High—Module On

Logic Low:

At Ion/off = 1.0 mA
At Von/off = 0.0 V

Logic High:

At Ion/off = 0.0 µA
Leakage Current

Turn-on Time; see Typical Start-up Curve(IO = IO max;

Vo within ±1% of steady state)

Output Voltage Adjustment

(See Feature Descriptions):

Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)

Output Overvoltage Protection VO, ovsd 1.69 — 2.07 V

Overtempera

* A Minimum OFF Period of 1 sec is recommended.

WuUe Protection (IO = IO, max) Tref1 — 127 — °C

.

Von/off

Ion/off

Von/off

Ion/off

—
—

—

—
—

—
80

0

—
—

—
—

2

—
—

1.2

1.0

15
50

4

10

110

V

mA

V
µA
ms

%VO,rated

%V0,nom

Lineage Power 7

Data Sheet

5

INPUT VOLTAGE, VI (V)

INPUT CURRENT, I

(A)

90

5

OUTPUT CURRENT, IO (A)

TIME, t (1 µs/div)

OUTPUT VOLTAGE,

TIME, t (50 µs/div)

,

)

TIME, t (50 µs/div)

,

)

August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Characteristic Curves

The following figures provide typical characteristics curves for the QRW025A0M (VO = 1.5 V) module at room temperature
(TA = 25 °C)

1.4

1.2

I

1

0.8

0.6

0.4

0.2
0

25 35 45 55 65 7

IO = 25 A

IO = 12.5 A

IO = 0 A

Figure 7. Input Voltage and Current Characteristics.

88
86
84
82
80
78
76

EFFICIENCY η (%)

74
72
70

0 5 10 15 20 2

VI = 36 V
V

I

= 48 V

V

I

= 75 V

Figure 8. Converter Efficiency vs. Output Current.

(V) (100 mV/idv

O

V

OUTPUT VOLT AGE

(A) (5 A/div)

O

I

OUTPUT CURRENT,

Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.

Figure 10. Transient Response to Step Decrease in

Load from 50% to 25% of Full Load (VI = 48
Vdc).

(V) (100 mV/idv

O

V

OUTPUT VOLT AGE

(A) (5 A/div)

O

I

OUTPUT CURRENT,

Figure 11. Transient Response to Step Increase in

Load from 50% to 75% of Full Load (VI = 48
Vdc).

36V, 25A

0.

48V, 25A

VO (V) (20 mV/idv)

75V, 25A

Tested with a 10µF aluminium and a 1.0µF tantalum capacitor

Figure 9. Output Ripple Voltage (IO = IO, max).

across the load.

Figure 12. Start-up from Remote On/Off (IO = IO, max).

Lineage Power 8

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Electrical Specifications (continued)

Output Specifications for the QRW025A0Y (Vo = 1.8Vdc)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)

Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)

Output Regulation:

Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)

Output Ripple and Noise

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

External Load Capacitance — 25,000 µF

Output Current
(Vo =90% of VO, nom.)

Output Current-limit Inception
(VO = 90% of VO, set)

Output Short-circuit Current (Average)VO = 0.25 V Latched off

Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C

Switching Frequency All fSW — 300 — kHz

Dynamic Response

(DIO/Dt = 1 A/10 µs, VI = 48 V, TA = 25 °C); tested
with a 220 µF aluminium and a 1.0 µf ceramic
capacitor across the load.):
Load Change from
IO = 50% to 75% of IO, max:

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

Load Change from IO = 50% to 25%

of IO, max :

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

Y Vo 1.77 1.8 1.83 Vdc

Y Vo 1.75 — 1.85 Vdc

Y—

—
—

Y—

YIO0.0—25Adc

Y IO, lim — 30 — Adc

η —88— %

—
—
—

—

0.05

0.05
15

—
—

8

200

8

200

0.2

0.2
50

35

100

%, VO, set
%, VO, set

mVrms

mVp-p

mV

mV

µs

mV

µs

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso — 5600 — PF

Isolation Resistance Riso 10 — — MW

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO = 80% of IO, max TA = 40 °C) 1,644,000 Hours

Weight — 37(1.31) — g (oz.)

Lineage Power 9

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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 Ty p Max Unit

Remote On/Off Signal Interface*

(VI = 0 V to 75 V; open collector or equivalent compatible; signal
referenced to VI(–) terminal; see Figure 34
and Feature Descriptions.):

Preferred Logic:

Logic Low—Module On
Logic High—Module Off

Optional Logic:

Logic Low—Module Off
Logic High—Module On

Logic Low:

At Ion/off = 1.0 mA
At Von/off = 0.0 V

Logic High:

At Ion/off = 0.0 µA
Leakage Current

Turn-on Time; see Typical Start-up Curve(IO = IO max;

Vo within ±1% of steady state)

Output Voltage Adjustment

(See Feature Descriptions):

Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)

Output Overvoltage Protection VO, ovsd 2.0 — 2.5 V

Overtempera

* A Minimum OFF Period of 1 sec is recommended.

WuUe Protection (IO = IO, max) Tref1 — 127 —

.

Von/off

Ion/off

Von/off

Ion/off

—
—

—

—
—

—
80

0

—
—

—
—

4

—
—

1.2

1.0

15
50

8

10

110

V

mA

V

µA

ms

%VO,rated

%V0,nom

°C

Lineage Power 10

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Characteristic Curves

The following figures provide typical characteristics curves for the QRW025A0Y (VO = 1.8 V) module at room temperature (TA
= 25 °C)

1.6

1.4

1.2

(A)

I

IO = 25 A
I

O

= 12.5 A

I

O

= 0 A

1

0.8

0.6

0.4

INPUT CURRENT, I

0.2
0

25 30 35 40 45 50 55 60 65 70 75

INPUT VOLT AGE, VI (V)

Figure 13. Input Voltage and Current Characteristics.

90
88
86
84
82
80
78
76

EFFICENCY, η (%)

74
72
70

VI = 36 V

VI = 75 V

I = 48 V

V

0 5 10 15 20 25

(V)

O

(100 mV/div)

OUTPUT VOLTAGE, V
(A)

O

(10 A/div)

OUTPUT CURRENT, I

TIME, t (100 µs/div)

Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.

Figure 16. Transient Response to Step Decrease in

Load from 50% to 25% of Full Load
(VI = 48 Vdc).

(V)

O

(100 mV/div)

OUTPUT VOLTA GE, V
(A)

O

(10 A/div)

OUTPUT CURRENT, IO (A)

Figure 14. Converter Efficiency vs. Output Current.

OUTPUT CURRENT, I

TIME, t (100 µs/div)

Figure 17. Transient Response to Step Increase in Load

from 50% to 75% of Full Load
(VI = 48 Vdc).

VI = 36 V

(V)

O

(50 mV/div)

OUTPUT VOLTA GE, V

VI = 48 V

VI = 75 V

(0.5 V/div)

OUTPUT VOLT AGE, (V)

(V)

ON/OFF

V

REMOTE ON/OFF,

TIME, t (2 ms/div)

TIME, t (1 µs/div)

Figure 15. Output Ripple Voltage (IO = IO, max).

Tested with a 10µF aluminium and a 1.0µF tantalum capacitor across
the load.

Figure 18. Start-up from Remote On/Off (IO = IO, max).

Lineage Power 11

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Electrical Specifications (continued)

Output Specifications for the QRW025A0G (Vo = 2.5Vdc)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)

Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)

Output Regulation:

Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)

Output Ripple and Noise

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

External Load Capacitance — 25,000 µF

Output Current
(Vo =90% of VO, nom.)

Output Current-limit Inception
(VO = 90% of VO, set)

Output Short-circuit Current (Average)VO = 0.25 V Latched off

Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C

Switching Frequency All fSW — 300 — kHz

Dynamic Response

(DIO/Dt = 1 A/10 µs, VI = 48 V, TA = 25 °C); tested
with a 220 µF aluminium and a 1.0 µf ceramic
capacitor across the load.):
Load Change from
IO = 50% to 75% of IO, max:

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

Load Change from IO = 50% to 25%

of IO, max :

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

G Vo 2.47 2.5 2.53 Vdc

G Vo 2.42 — 2.58 Vdc

G—

—
—

G—

GIO0.0—25Adc

G IO, lim — 30 — Adc

η —90— %

—
—
—

—

0.05

0.05
15

—
—

5

200

5

200

0.2

0.2
50

35

100

%, VO, set
%, VO, set

mVrms

mVp-p

mV

mV

µs

mV

µs

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso — 5600 — PF

Isolation Resistance Riso 10 — — MW

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO = 80% of IO, max TA = 40 °C) 1,558,000 Hours

Weight — 37(1.31) — g (oz.)

Lineage Power 12

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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 Ty p Max Unit

Remote On/Off Signal Interface*

(VI = 0 V to 75 V; open collector or equivalent compatible; signal
referenced to VI(–) terminal; see Figure 52
and Feature Descriptions.):

Preferred Logic:

Logic Low—Module On
Logic High—Module Off

Optional Logic:

Logic Low—Module Off
Logic High—Module On

Logic Low:

At Ion/off = 1.0 mA
At Von/off = 0.0 V

Logic High:

At Ion/off = 0.0 µA
Leakage Current

Turn-on Time; see Typical Start-up Curve(IO = IO max;

Vo within ±1% of steady state)

Output Voltage Adjustment

(See Feature Descriptions):

Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)

Output Overvoltage Protection VO, ovsd 2.9 — 3.2 V

Overtempera

* A Minimum OFF Period of 1 sec is recommended.

WuUe Protection (IO = IO, max) Tref1 — 127 —

.

Von/off

Ion/off

Von/off

Ion/off

—
—

—

—
—

—
80

0

—
—

—
—

2

—
—

1.2

1.0

15
50

4

10

110

V

mA

V

µA

ms

%VO,rated

%V0,nom

°C

Lineage Power 13

Data Sheet

5

INPUT CURRENT, I

(A)

95

5

OUTPUT CURRENT, I

(A)

TIME, t (1 µs/div)

OUTPUT VOLTAGE, V

(V)

V)

V)

TIME, t (1 ms/div)

REMOTE ON/OFF,

OUTPUT VOLTAGE, V

(V)

August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Characteristic Curves

The following figures provide typical characteristics curves for the QRW025A0G (VO = 2.5 V) module at room temperature (TA
= 25 °C)

2

1.8

1.6

I

1.4

1.2
1

0.8

0.6

0.4

0.2
0

25 35 45 55 65 7

INPUT VOLTAGE, VI (V)

IO = 25 A

IO = 12.5 A

IO = 0 A

Figure 19. Input Voltage and Current Characteristics.

90

85

80

EFFICIENCY η (%)

75

VI = 36 V

VI = 48 V

V

I

= 75 V

(

O

(100 mV/div)

OUTPUT VOLTAGE, V
(A)

O

(5 A/div)

OUTPUT CURRENT, I

TIME, t (100 µs/div)

Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.

Figure 22. Transient Response to Step Decrease in

Load from 50% to 25% of Full Load
(VI = 48 Vdc).

(100 mV/div)

OUTPUT VOLTAGE, VO (

Figure 20. Converter Efficiency vs. Output Current.

Figure 21. Output Ripple Voltage (IO = IO, max).

Lineage Power 14

70

0 5 10 15 20 2

O

O

(50 mV/div)

(5 A/div)

OUTPUT CURRENT, IO (A)

TIME, t (100 µs/div)

Figure 23. Transient Response to Step Increase in

Load from 50% to 75% of Full Load
(VI = 48 Vdc).

O

(1 V/div)

Von/off (V)

Tested with a 10µF aluminium and a 1.0µF tantalum capacitor
across the load.

Figure 24. Start-up from Remote On/Off (IO = IO, max).

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Electrical Specifications (continued)

Output Specifications for the QRW025A0F (Vo = 3.3Vdc)

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)

Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)

Output Regulation:

Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)

Output Ripple and Noise

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

External Load Capacitance — 30,000 µF

Output Current
(Vo =90% of VO, nom.)

Output Current-limit Inception
(VO = 90% of VO, set)

Output Short-circuit Current (Average)VO = 0.25 V Latched off

Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C

Switching Frequency All fSW — 300 — kHz

Dynamic Response

(DIO/Dt = 1 A/10 µs, VI = 48 V, TA = 25 °C); tested
with a 220 µF aluminium and a 1.0 µf ceramic
capacitor across the load.):
Load Change from
IO = 50% to 75% of IO, max:

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

Load Change from IO = 50% to 25%

of IO, max :

Peak Deviation
Settling Time

(VO < 10% of peak deviation)

F Vo 3.24 3.3 3.36 Vdc

F Vo 3.2 — 3.4 Vdc

F—

—
—

F—

FIO0.0—25Adc

F IO, lim — 28 — Adc

η —91— %

—
—
—

—

0.05

0.05
15

—
—

5

200

5

200

0.2

0.2
50

30

100

%, VO, set
%, VO, set

mV

mVrms

mVp-p

mV

µs

mV

µs

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso — 5600 — PF

Isolation Resistance Riso 10 — — MW

General Specifications

Parameter Min Typ Max Unit

Calculated MTBF (IO = 80% of IO, max TA = 40 °C) 1,548,000 Hours

Weight — 37(1.31) — g (oz.)

Lineage Power 15

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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

Remote On/Off Signal Interface*

(VI = 0 V to 75 V; open collector or equivalent compatible; signal
referenced to VI(–) terminal; see Figure 34
and Feature Descriptions.):

Preferred Logic:

Logic Low—Module On
Logic High—Module Off

Optional Logic:

Logic Low—Module Off
Logic High—Module On

Logic Low:

At Ion/off = 1.0 mA
At Von/off = 0.0 V

Logic High:

At Ion/off = 0.0 µA
Leakage Current

Turn-on Time; see Typical Start-up Curve(IO = IO max;

Vo within ±1% of steady state)

Output Voltage Adjustment

(See Feature Descriptions):

Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim)

Output Overvoltage Protection VO, ovsd 3.8 — 4.6 V

Overtempera

* A Minimum OFF Period of 1 sec is recommended.

WuUe Protection (IO = IO, max) Tref1 —

.

Von/off

Ion/off

Von/off

Ion/off

—
—

—

—
—

—
80

0

—
—

—
—

2

—
—

127 — °C

1.2

1.0

15
50

4

10

110

V

mA

V

µA

ms

%V0,nom

%V0,nom

Lineage Power 16

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Characteristic Curves

The following figures provide typical characteristics curves for the QRW025A0F (VO = 3.3 V) module at room temperature (TA =
25 °C)

3.5

3

2.5

(A)

I

2

1.5

INPUT CURRENT, I

1

0.5

0

0 1020304050 6070

INPUT VOLTAGE, V

(V)

I

IO = 25 A

= 12.5 A

I

O

= 2.5 A

I

O

Figure 25. Input Voltage and Current Characteristics.

95

90

(%)

η

85

80

EFFICENCY,

75

VI = 36 V
V

= 48 V

I

V

= 75 V

I

Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.

Figure 28. Transient Response to Step Decrease in

Load from 50% to 25% of Full Load
(VI = 48 Vdc).

70

0 5 10 15 20 25 30

OUTPUT CURRENT, I

(A)

O

Figure 29. Transient Response to Step Increase in Load

Figure 26. Converter Efficiency vs. Output Current.

from 50% to 75% of Full Load
(VI = 48 Vdc).

36V, 25A

(V)

(V)

O

(50 mV/div)

OUTPUT VOL TAGE, V

48V, 25A

75V, 25A

ON/OFF

V

REMOTE ON/OFF

(1 V/div)

OUTPUT VOLT AGE (V)

TIME, t (2 ms/div)

TIME, t (2µs/div)

Figure 27. Output Ripple Voltage (IO = IO, max).

Tested with a 10µF aluminium and a 1.0µF tantalum capacitor across
the load.

Figure 30. Start-up from Remote On/Off (IO = IO, max).

Lineage Power 17

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Test Configurations

TO

OSCILLOSCOPE

L

TEST

12 μH

S

220 μF

C

BATTERY

ESR < 0.1
@ 20 ºC 100 kHz

CURRENT

PROBE

Ω

VI(+)

I

(–)

V

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 31,
a 33 µF electrolytic capacitor (ESR < 0.7 W at 100 kHz)
mounted close to the power module helps ensure
stability of the unit. For other highly inductive source imped­ances, consult the factory for further application guidelines.

Note:Measure input reflected-ripple current with a simulated

source inductance (LTEST) of 12 µH. Capacitor CS off­sets possible battery impedance. Measure current as

Output Capacitance

shown above.

Figure 31. Input Reflected-Ripple Test Setup.

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. Tp minimize

COPPER STRIPS

VO(+)

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 tran-

1.0 μF

O

(-)

V

10

μ

F

SCOPE

RESISTIVE
LOAD

sient.

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 associ-

Note:Use a 1.0 µF ceramic capacitor and a 10 µF aluminum

or tantalum capacitor. Scope measurement should be
made using a BNC socket. Position the load between
51 mm and 76 mm (2 in. and 3 in.) from the module.

ated E.S.R. may be dictated, depending on the module’s con­trol system.

The process of determining the acceptable values of capaci-

tance and E.S.R. is complex and is load-dependant. Lineage

provides Web-based tools to assist the power module end-

Figure 32. Peak-to-Peak Output Noise Measurement Test

Setup.

CONTACT AND

DISTRIBUTION LOSSES

I

O

LOAD

SUPPLY

CONTACT

RESISTANCE

SENSE(+)

O

(+)

V

V

I

(+)

I

I

I

(–)

V

VO(–)

SENSE(–)

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, CSA C22.2

No. 60950-00, and VDE 0805:2001-12 (IEC60950, 3rd Ed).

These converters have been evaluated to the spacing
requirements for Basic Insulation, per the above safety stan-

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.

dards; and 1500 Vdc is applied from VI to VO to 100% of out­going production.

For end products connected to –48 Vdc, or –60 Vdc nomianl
DC MAINS (i.e. central office dc battery plant), no further fault
testing is required.

(+) VO(-)–[]I

V

O

⎛⎞

η

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

⎝⎠

V

(+) VI(-)–[]I

I

O

100 %×=

I

Note:–60 V dc nominal bettery plants are not available in the

U.S. or Canada.
For all input voltages, other than DC MAINS, where the input
voltage is less than 60 Vdc, if the input meets all of the

Figure 33. Output Voltage and Efficiency Measurement.

requirements for SELV, then:

n

The output may be considered SELV. Output voltages will

Lineage Power 18

Data Sheet
August 23, 2010

remain withing SELV limits even with internally-generated
non-SELV voltages. Single component failure and fault
tests were performed in the power converters.

n

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 75 Vdc (Classified as TNV-2 in
Europe), the following must be adhered to, if the converter’s
output is to be evaluated for SELV:

n

The input source is to be provided with reinforced insula­tion from any hazardous voltage, including the AC mains.

n

One VI pin and one VO pin are to be reliably earthed, or
both the input and output pins are to be kept floating.

n

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, and UL60950A.2 for reduced thick­nesses. The input to these units is to be provided with a max­imum 10A normal-blow fuse in the ungrounded lead.

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Lineage Power 19

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Feature Descriptions

Overcurrent Protection

To provide protection in a fault output overload condition, the
module is equipped with internal current-limiting circuitry and
can endure current limit for few seconds. If overcurrent per­sists for few seconds, the module will shut down and remain
latch-off.

The overcurrent latch is reset by either cycling the input
power or by toggling the on/off pin for one second. If the out­put overload condition still exists when the module restarts, it
will shut down again. This operation will continue indefinitely
until the overcurrent condition is corrected.

An auto-restart option is also available.

Remote On/Off

Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic-high volt­age on the ON/OFF pin, and off during a logic low. Negative
logic remote on/off turns the module off during a logic high
and on during a logic low. Negative logic, device code suffix
"1," is the factory-preferred configuration.

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 VI(-) terminal (Von/off). The switch can be an open col­lector or equivalent (see Figure 10). A logic low is Von/off = 0
V to I.2 V. The maximum Ion/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 at Von/off = 15V is 50 µA.

If not using the remote on/off feature, do one of the following
to turn the unit on

For negative logic, short ON/OFF pin to VI(-).
For positive logic: leave ON/OFF pin open.

on/off

I

ON/OFF

+

V

on/off

–

I

(+)

V

I

(–)

V

Figure 34. Remote On/Off Implementation.

SENSE(+)

V

O

(+)

O

(–)

V

SENSE(–)

LOAD

[Vo(+) – Vo(-)] – [SENSE(+) – SENSE(-)] £ 10% of Vo, rated

The voltage between the Vo(+) and Vo(-) terminals must not
exceed the minimum output overvoltage shutdown value
indicated in the Feature Specifications table. This limit
includes any increase in voltage due to remote-sense com­pensation and output voltage set-point adjustment (trim).
See Figure 35.

If not using the remote-sense feature to regulate the output
at the point of load, then connect SENSE(+) to Vo(+) and
SENSE(-) to Vo(-) at the module.

Although the output voltage can be increased by both the
remote sense and by tine 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.

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 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.

SENSE(+)

SENSE(–)

V

I(+)

SUPPLY

CONTACT

VO(+)

I

I

V

I(–)

V

O(–)

I

O

CONTACT AND

DISTRIBUTION LOSSESRESISTANCE

LOAD

Figure 35. Effective Circuit Configuration for

Single-Module Remote-Sense Operation
Output Voltage.

Output Overvoltage Protection

The output overvoltage protection consists of circuitry that
monitors the voltage on the output terminals. If the voltage
on the output terminals exceeds the over voltage protection
threshold, then the module will shutdown and latch off. The
overvoltage latch is reset by either cycling the input power
for one second or by toggling the on/off signal for one sec­ond.

The protection mechanism is such that the unit can continue
in this condition until the fault is cleared.

Overtemperature Protection

Remote Sense

to safeguard against thermal damage. The circuit shuts
down and latches off the module when the maximum device

These modules feature an overtemperature protection circuit

Remote sense minimizes the effects of distribution losses by
regulating the voltage at the remote-sense connections. 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 i.e.:

reference temperature is exceeded. The module can be
restarted by cycling the dc input power for at least one sec­ond or by toggling the remote on/off signal for at least one
second.

Lineage Power 20

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Feature Descriptions (Continued)

Output Voltage Set-Point Adjustment (Trim)

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. The trim resistor should be
positioned close to the module

If not using the trim feature, leave the TRIM pin open.

With an external resistor between the TRIM and SENSE(-)
pins (Radj-down), the output voltage set point (Vo,adj)
decreases (see Figure 36). The following equation deter­mines the required external-resistor value to obtain a per­centage output voltage change of Δ%.

For Output Voltage: 1.2V - 12V

With an external resistor connected between the TRIM and
SENSE(+) pins (Radj-up), the output voltage set point
(Vo,adj) increases (see Figure 37).

The following equation determines the required external­resistor value to obtain a percentage output voltage change
of D%

For Output Voltage: 1.5V - 12V

.

VI

(+)

ON/OFF

CASE

VI(–)

O(+)

V

SENSE(+)

TRIM

SENSE(–)

V

O(–)

adj-down

R

RLOAD

Figure 36. Circuit Configuration to Decrease Output

Voltage.

VI

(+)

ON/OFF

CASE

VI(–)

O(+)

V

SENSE(+)

TRIM

SENSE(–)

O(–)

V

R

adj-up

RLOAD

For Output Voltage: 1.2V

The voltage between the Vo(+) and Vo(-) terminals must not
exceed the minimum output overvoltage shut-down value
indicated in the Feature Specifications table. This limit
includes any increase in voltage due to remote-sense com­pensation and output voltage set-point adjustment (trim). See
Figure 35.

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.

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 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.

Figure 37. Circuit Configuration to Increase Output

Voltage.

Lineage Power 21

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

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-dissipating
components are mounted on the top side 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 (See 38). Peak temperature
(Tref) can occur at any of these positions indicated in Figure

50.

1

Note:Top view, pin locations are for reference only.

Figure 38. Temperature Measurement Location.

The temperature at any one of these locations should not
exceed per Table 1 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.

Although the maximum Tref temperature of the power mod­ules is per Table 1, you can limit these temperatures to a
lower value for extremely high reliability.

Table 1. Device Temperature

Output Voltage Device Temperature (°C)

1.2V Tref1 114

1.5V Tref1 111

1.8V Tref1 117

2.5V Tref1 117

3.3V Tref1 117

versus local ambient temperature (TA) for natural convection
through 2 m/s (400 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. The use of output power derating curve is shown in the
following example.

What is the minimum airflow necessary for a QRW025A0F
operating at VI = 48 V, an output current of 25A, and a maxi­mum ambient temperature of 70 °C.

Solution

Given: VI = 48V

Io = 25A

TA = 70 °C

Determine airflow (v) (Use Figure 43):

v = 1m/sec. (200ft./min.)

40

35

O

30

25

20

15

10

OUTPUT CURRENT, I (A)

5

0

20 30 40 50 60 70 80 90

LOCAL AMBIENT TEMPERATURE, T (°C)

A

Figure 39. Output Power Derating for QRW025A0P (Vo =

1.2V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.

40

35

O

30

25

20

15

10

OUTPUT CURRENT, I (A)

5

0

20 30 40 50 60 70 80 90

LOCAL AMBIENT TEMPERATURE, T (°C)

A

Heat Transfer Without Heat Sinks

Increasing airflow over the module enhances the heat trans­fer via convection. Figures 39 through 43 shows the maxi­mum current that can be delivered by the corresponding

Figure 40. Output Power Derating for QRW025A0M (Vo

= 1.5V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.

module without exceeding the maximum case temperature

Lineage Power 22

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Thermal Considerations

(continued)

Figure 41. Output Power Derating for QRW025A0Y (Vo =

1.8V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.

Figure 42. Output Power Derating for QRW025A0G (Vo

= 2.5V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.

40

35

O

30

25

20

15

10

OUTPUT CURRENT, I (A)

5

0

20 30 40 50 60 70 80 90

LOCAL AMBIENT TEMPERATURE, T (°C)

A

Figure 43. Output Power Derating for QRW025A0F (Vo =

3.3) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.

Lineage Power 23

Data Sheet
August 23, 2010

Outline Diagram

Dimensions are in millimeters and (inches)
Tolerences: x.x mm 0.5 mm (x.xx in. 0.02 in.)

x.xx mm 0.25 mm (x.xxx in. 0.010 in.)

Top View

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Side View

Bottom View

*Top Side label includes Lineage name, product designation, and data code.

†

Optional Features, Pin is not present unless one of these options is specified.

Lineage Power 24

Data Sheet
August 23, 2010

Recommended Hole Pattern

Dimensions are in millimeters and (inches).

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Lineage Power 25

Data Sheet
August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A

Through-Hole Lead-Free Soldering Infor­mation

The RoHS-compliant through-hole products use the SAC
(Sn/Ag/Cu) Pb-free solder and RoHS-compliant compo­nents. They are designed to be processed through single or
dual wave soldering machines. The pins have an RoHS­compliant finish that is compatible with both Pb and Pb-free
wave soldering processes. A maximum preheat rate of 3°C/s
is suggested. The wave preheat process should be such
that the temperature of the power module board is kept
below 210°C. For Pb solder, the recommended pot temper­ature is 260°C, while the Pb-free solder pot is 270°C max.
Not all RoHS-compliant through-hole products can be pro­cessed with paste-through-hole Pb or Pb-free reflow pro­cess. If additional information is needed, please consult with

your Lineage Power representative for more details.

Post Solder Cleaning and Drying Considerations

Post solder cleaning is usually the final circuit-board
assembly process prior to electrical board testing. The result
of inadequate cleaning and drying can affect both the
reliability of a power module and the testability of the
finished circuit-board assembly. For guidance on appropriate

soldering, cleaning and drying procedures, refer to Lineage

Power Board Mounted Power Modules: Soldering and
Cleaning Application Note (AP01-056EPS).

Lineage Power 26

Data Sheet

p

A

a

©

August 23, 2010

QRW025 Series Power Modules; dc-dc Converters

36 Vdc - 75 Vdc In

ut, 1.2 to 3.3 Vdc Output; 25

Ordering Information

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

Table 1. Product Codes

Input Voltage

48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 3.3V 25A 91% Through hole
48V (36-75Vdc) 2.5V 25A 90% Through hole
48V (36-75Vdc) 2.5V 25A 90% Through hole
48V (36-75Vdc) 1.8V 25A 88% Through hole
48V (36-75Vdc) 1.8V 25A 88% Through hole
48V (36-75Vdc) 1.5V 25A 87% Through hole
48V (36-75Vdc) 1.5V 25A 87% Through hole
48V (36-75Vdc) 1.2V 25A 85% Through hole
48V (36-75Vdc) 1.2V 25A 85% Through hole

Output

Voltage

Table 2. Device Options

Output

Current

Efficiency Connector Type Product Codes Comcodes

QRW025A0F1 108965765
QRW025A0F4 108974809
QRW025A0F41 108969213
QRW025A0F1Z CC109101482
QRW025A0F1-H 108968918
QRW025A0F41-H 108981267
QRW025A0F1-HZ CC109153053
QRW025A0G41 108971656
QRW025A0G1-H 108972126
QRW025A0Y4 108974825
QRW025A0Y61 108975483
QRW025A0M41-H 108986373
QRW025A0M641-H CC109155297
QRW025A0P1 108965799
QRW025A0P1Z CC109139515

Characteristic Definition

Form Fac t or Q Q = Q uarter Brick
Family Des ignat or R Family Designat or
Input Voltage W W = Wide Range, 36V -75V
Output Current 025A0 025A0 = 025.0 Am ps Maxim um O utput Current

Ratings

Output V olt age

Pin Length

Ac ti on following
Protec ti ve Shutdown

On / Off L o g i c

Options

Mec hanic al F eat ures
Custom er S pec ific XY XY = Cus t om er S pec ific M odified Code, Om i t for Standard Code
RoHS

World Wid e Headqu arters
Lineage Power Corporation

601 Shiloh Road, Plano, TX 75074, USA
[phone]
(Outside U.S.A.: [phone])

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

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

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

Lineage Power DC-DC products are protected under various patents. Information on these patents is available at www.lineagepower.com/patents.

2009 Lineage Power Corporation, (Plano, Texas) All International Rights Reserved.

Character and Position

F
G
Y
M
P P = 1. 2 V nominal

8 8 = Pi n Length: 2.79 m m ± 0.25m m , (0.110 in. ± 0. 010 in.)
7 7 = Case P in (only available with H option)
6 6 = Pi n Length: 3.68 m m ± 0.25m m , (0.145 in. ± 0. 010 in.)

4 4 = Aut o-rest art following s hut down (Overcurrent/Overvolt age)

1 1 = Negative Logic

H H = Heat plate, for use wit h heat s inks or c old-walls

F =3. 3V nominal
G =2. 5V nom inal
Y = 1. 8 V nominal
M = 1. 5V nom inal

Omit = Default Pin Lengt h s hown in Mec hanic al Out line Figures

Omit = Latc hing M ode

Omit = P os iti ve Logic

Omit = S tandard open Frame M odule

Omit = RoHS 5/ 6, Lead B as ed Solder Used

Z Z = RoHS 6/6 Compli ant, Lead free

Asia-Pacific Headquar ters

Tel: [phone]

Europe, Middle-East and Africa Headquarters

Tel: [phone]

India Headquarters

Tel: [phone]

PDF name: QRW025_Series.pdf