Data Sheet
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
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 versions)
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
Positive Remote On/Off logic
Adjustable output voltage (+10% / -20%)
Case ground pin (-H Base plate version)
Auto restart after fault shutdown
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† C22.2 No. 60950‡
rd
1-03 Certified, and VDE 0805 (IEC60950, 3
Edition) Licensed
CE mark meets 2006/95/EC directive
ISO* 9001 certified manufacturing facilities
§
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, the QRW-series supports future migration of semiconductor and
microprocessor supply voltages down to 1.0V.
* 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.pdf
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.
Device
Symbol
Min
Max
Unit
Input Voltage:Continuous
Transient (100ms)
Parameter
All
VI
VI, trans
—
—
75
100
Vdc
Vdc
Operating Ambient Temperature
(See Thermal Considerations section)
All
TA
–40
85
°C
Storage Temperature
All
Tstg
–55
125
°C
I/O Isolation Voltage (100% factory Hi-Pot tested)
When using optional case ground pin
(option 7)
—
—
—
1500
700
Vdc
Vdc
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter
Device
Symbol
Min
Typ
Operating Input Voltage
All
VIN
36
48
75
Vdc
Maximum Input Current
(VI = 0 V to 75 V; IO = IO, max)
All
—
—
2.8m n
Adc
Inrush Transient
All
1
A 2s
Input Reflected Ripple Current, peak-peak
(5 Hz to 20 MHz, 12 µH source impedance
See Test configuration section)
All
16
mAp-p
Input Ripple Rejection (120 Hz)
All
60
dB
I2 t
Max
Unit
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
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
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)
P
Vo
1.18
1.2
1.22
Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
P
Vo
1.15
—
1.25
Vdc
P
—
—
—
—
—
—
0.05
0.05
5
0.3
0.3
20
%, VO, set
%, VO, set
mV
—
—
—
—
30
100
mVrms
mVp-p
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)
P
External Load Capacitance
—
25,000
µF
Output Current
(Vo =90% of VO, nom.)
P
IO
0.0
—
25
Adc
Output Current-limit Inception
(VO = 90% of VO, set)
P
IO, lim
—
29
—
Adc
η
—
85
—
%
fSW
—
300
—
kHz
Output Short-circuit Current (Average)VO = 0.25 V
Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C
Switching Frequency
All
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)
8
200
mV
µs
8
200
mV
µs
Isolation Specifications
Parameter
Symbol
Min
Typ
Max
Unit
Isolation Capacitance
Ciso
—
5600
—
PF
Isolation Resistance
Riso
10
—
—
MW
General Specifications
Parameter
Min
Calculated MTBF (IO = 80% of IO, max TA = 40 °C)
Weight
Lineage Power
Typ
Max
1,771,000
—
37(1.31)
Unit
Hours
—
g (oz.)
3
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
See Feature Descriptions for additional information.
Parameter
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
OvertemperaWuUe Protection (IO = IO, max)
Lineage Power
Symbol
Min
Typ
Max
Unit
Von/off
Ion/off
0
—
—
—
1.2
1.0
V
mA
Von/off
Ion/off
—
—
—
—
2
15
50
4
V
µA
ms
—
—
—
80
—
—
10
110
%VO,rated
%V0,nom
VO, ovsd
Tref1
1.42
—
—
127
1.58
—
V
°C
4
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
March 27, 2008
Characteristic Curves
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V)
(5 A/div)
(50 mV/div)
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
INPUT CURRENT, II (A)
1
IO = 25A
0.8
0.6
IO = 12.5A
0.4
IO = 2.5A
0.2
00
10
20
30
40
50
INPUT VOLTAGE, VI (V)
60
70
80
Figure 1. Input Voltage and Current Characteristics.
TIME, t, (.2 µs/div)
Tested with a 220µF aluminium and a 1.0µF ceramic
capacitor across the load.
Figure 4.
90
80
EFFICIENCY, η (%)
70
60
VI = 75V
VI = 48V
VI = 36V
50
40
30
20
10
0
0
5
10
15
20
25
OUTPUT CURRENT, IO (A)
30
Figure 2. Converter Efficiency vs. Output Current.
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V)
(5 A/div)
(50 mV/div)
100
Transient Response to Step decrease in
Load from 50% to 25% of Full Load (VI = 48
Vdc).
TIME, t, (.2 µs/div)
Figure 5.
Transient Response to Step Increase in Load
from 50% to 75% of Full Load (VI = 48 Vdc).
0.5
OUTPUT VOLTAGE, VO (V)
(20 mV/div)
36V, 25A
48V, 25A
75V, 25A
TIME, t (1 µs/div)
Figure 3. Output Ripple Voltage (IO = IO, max).
Lineage Power
Figure 6. Start-up from Remote On/Off (IO = IO, max).
5
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Electrical Specifications (continued)
Output Specifications for the QRW025AOM (Vo = 1.5Vdc)
Device
Symbol
Min
Typ
Max
Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)
Parameter
M
Vo
1.47
1.5
1.52
Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
M
Vo
1.45
—
1.55
Vdc
M
—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
—
—
—
—
20
100
mVrms
mVp-p
—
25,000
µF
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)
M
External Load Capacitance
Output Current
(Vo =90% of VO, nom.)
M
IO
0.0
—
25
Adc
Output Current-limit Inception
(VO = 90% of VO, set)
M
IO, lim
—
30
—
Adc
η
—
87
—
%
fSW
—
300
—
kHz
Output Short-circuit Current (Average)VO = 0.25 V
Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C
Switching Frequency
All
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)
6
200
6
200
mV
µs
mV
µs
Isolation Specifications
Symbol
Min
Typ
Max
Isolation Capacitance
Parameter
Ciso
—
5600
—
Unit
PF
Isolation Resistance
Riso
10
—
—
MW
General Specifications
Parameter
Min
Calculated MTBF (IO = 80% of IO, max TA = 40 °C)
Weight
Lineage Power
Typ
Max
1,715,000
—
37(1.31)
Unit
Hours
—
g (oz.)
6
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
See Feature Descriptions for additional information.
Parameter
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
OvertemperaWuUe Protection (IO = IO, max)
Symbol
Min
Typ
Max
Unit
Von/off
Ion/off
0
—
—
—
1.2
1.0
V
mA
Von/off
Ion/off
—
—
—
—
2
15
50
4
V
µA
ms
—
—
—
80
—
—
10
110
%VO,rated
%V0,nom
VO, ovsd
Tref1
1.69
—
—
127
2.07
—
V
°C
* A Minimum OFF Period of 1 sec is recommended.
Lineage Power
7
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Characteristic Curves
INPUT CURRENT, II (A)
1.4
1.2
1
IO = 25 A
0.8
0.6
IO = 12.5 A
0.4
0.2
IO = 0 A
0
25
35
45
55
INPUT VOLTAGE, VI (V)
65
75
OUTPUT CURRENT,
IO (A) (5 A/div)
OUTPUT VOLTAGE,
VO (V) (100 mV/idv)
The following figures provide typical characteristics curves for the QRW025A0M (VO = 1.5 V) module at room temperature
(TA = 25 °C)
TIME, t (50 µs/div)
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
Figure 7. Input Voltage and Current Characteristics.
Figure 10. Transient Response to Step Decrease in
Load from 50% to 25% of Full Load (VI = 48
Vdc).
88
EFFICIENCY η (%)
86
84
82
80
78
VI = 36 V
VI = 48 V
VI = 75 V
76
74
72
70
0
5
10
15
OUTPUT CURRENT, IO (A)
20
25
OUTPUT CURRENT,
IO (A) (5 A/div)
OUTPUT VOLTAGE,
VO (V) (100 mV/idv)
90
Figure 8. Converter Efficiency vs. Output Current.
TIME, t (50 µs/div)
Figure 11. Transient Response to Step Increase in
Load from 50% to 75% of Full Load (VI = 48
Vdc).
OUTPUT VOLTAGE,
VO (V) (20 mV/idv)
0.
36V, 25A
48V, 25A
75V, 25A
TIME, t (1 µs/div)
Figure 9.
Output Ripple Voltage (IO = IO, max).
Tested with a 10µF aluminium and a 1.0µF tantalum capacitor
across the load.
Figure 12. Start-up from Remote On/Off (IO = IO, max).
Lineage Power
8
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Electrical Specifications (continued)
Output Specifications for the QRW025A0Y (Vo = 1.8Vdc)
Device
Symbol
Min
Typ
Max
Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)
Parameter
Y
Vo
1.77
1.8
1.83
Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
Y
Vo
1.75
—
1.85
Vdc
Y
—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
—
—
—
—
35
100
mVrms
mVp-p
—
25,000
µF
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)
Y
External Load Capacitance
Output Current
(Vo =90% of VO, nom.)
Y
IO
0.0
—
25
Adc
Output Current-limit Inception
(VO = 90% of VO, set)
Y
IO, lim
—
30
—
Adc
η
—
88
—
%
fSW
—
300
—
kHz
Output Short-circuit Current (Average)VO = 0.25 V
Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C
Switching Frequency
All
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)
8
200
8
200
mV
µs
mV
µs
Isolation Specifications
Symbol
Min
Typ
Max
Isolation Capacitance
Parameter
Ciso
—
5600
—
Unit
PF
Isolation Resistance
Riso
10
—
—
MW
General Specifications
Parameter
Min
Calculated MTBF (IO = 80% of IO, max TA = 40 °C)
Weight
Lineage Power
Typ
Max
1,644,000
—
37(1.31)
Unit
Hours
—
g (oz.)
9
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
See Feature Descriptions for additional information.
Parameter
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
OvertemperaWuUe Protection (IO = IO, max)
Symbol
Min
Typ
Max
Unit
Von/off
Ion/off
0
—
—
—
1.2
1.0
V
mA
Von/off
Ion/off
—
—
—
—
4
15
50
8
V
µA
ms
—
—
—
80
—
—
10
110
%VO,rated
%V0,nom
VO, ovsd
Tref1
2.0
—
—
127
2.5
—
V
°C
* A Minimum OFF Period of 1 sec is recommended.
Lineage Power
10
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Characteristic Curves
1.6
IO = 25 A
IO = 12.5 A
IO = 0 A
1
0.8
0.6
0.4
0.2
0
30
35
40 45 50 55 60
INPUT VOLTAGE, VI (V)
65
70
75
Figure 13. Input Voltage and Current Characteristics.
90
88
VI = 36 V
EFFICENCY, η (%)
86
84
82
80
78
VI = 75 V
VI = 48 V
76
74
72
70
0
5
10
15
20
OUTPUT CURRENT, IO (A)
Figure 14. Converter Efficiency vs. Output Current.
VI = 36 V
OUTPUT VOLTAGE, VO (V)
(50 mV/div)
TIME, t (100 µs/div)
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
VI = 48 V
VI = 75 V
25
Figure 16. Transient Response to Step Decrease in
Load from 50% to 25% of Full Load
(VI = 48 Vdc).
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V)
(10 A/div)
(100 mV/div)
25
TIME, t (100 µs/div)
Figure 17. Transient Response to Step Increase in Load
from 50% to 75% of Full Load
(VI = 48 Vdc).
OUTPUT VOLTAGE, (V)
(0.5 V/div)
1.2
REMOTE ON/OFF,
VON/OFF (V)
INPUT CURRENT, II (A)
1.4
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V)
(10 A/div)
(100 mV/div)
The following figures provide typical characteristics curves for the QRW025A0Y (VO = 1.8 V) module at room temperature (TA
= 25 °C)
TIME, t (2 ms/div)
TIME, t (1 µs/div)
Figure 15. Output Ripple Voltage (IO = IO, max).
Lineage Power
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).
11
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Electrical Specifications (continued)
Output Specifications for the QRW025A0G (Vo = 2.5Vdc)
Device
Symbol
Min
Typ
Max
Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)
Parameter
G
Vo
2.47
2.5
2.53
Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
G
Vo
2.42
—
2.58
Vdc
G
—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
—
—
—
—
35
100
mVrms
mVp-p
—
25,000
µF
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)
G
External Load Capacitance
Output Current
(Vo =90% of VO, nom.)
G
IO
0.0
—
25
Adc
Output Current-limit Inception
(VO = 90% of VO, set)
G
IO, lim
—
30
—
Adc
η
—
90
—
%
fSW
—
300
—
kHz
Output Short-circuit Current (Average)VO = 0.25 V
Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C
Switching Frequency
All
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)
5
200
5
200
mV
µs
mV
µs
Isolation Specifications
Symbol
Min
Typ
Max
Isolation Capacitance
Parameter
Ciso
—
5600
—
Unit
PF
Isolation Resistance
Riso
10
—
—
MW
General Specifications
Parameter
Min
Calculated MTBF (IO = 80% of IO, max TA = 40 °C)
Weight
Lineage Power
Typ
Max
1,558,000
—
37(1.31)
Unit
Hours
—
g (oz.)
12
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
See Feature Descriptions for additional information.
Parameter
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
OvertemperaWuUe Protection (IO = IO, max)
Symbol
Min
Typ
Max
Unit
Von/off
Ion/off
0
—
—
—
1.2
1.0
V
mA
Von/off
Ion/off
—
—
—
—
2
15
50
4
V
µA
ms
—
—
—
80
—
—
10
110
%VO,rated
%V0,nom
VO, ovsd
Tref1
2.9
—
—
127
3.2
—
V
°C
* A Minimum OFF Period of 1 sec is recommended.
Lineage Power
13
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Characteristic Curves
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V)
(5 A/div)
(100 mV/div)
The following figures provide typical characteristics curves for the QRW025A0G (VO = 2.5 V) module at room temperature (TA
= 25 °C)
2
INPUT CURRENT, II (A)
1.8
1.6
1.4
1.2
IO = 25 A
1
0.8
IO = 12.5 A
0.6
0.4
0.2
0
IO = 0 A
25
35
45
55
65
75
INPUT VOLTAGE, VI (V)
TIME, t (100 µs/div)
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
95
VI = 36 V
EFFICIENCY η (%)
90
85
80
VI = 48 V
VI = 75 V
75
70
0
5
10
15
OUTPUT CURRENT, IO (A)
20
TIME, t (100 µs/div)
Figure 23. Transient Response to Step Increase in
Load from 50% to 75% of Full Load
(VI = 48 Vdc).
OUTPUT VOLTAGE, VO (V)
(50 mV/div)
REMOTE ON/OFF, OUTPUT VOLTAGE, VO (V)
Von/off (V)
(1 V/div)
Figure 20. Converter Efficiency vs. Output Current.
25
OUTPUT CURRENT, IO (A) OUTPUT VOLTAGE, VO (V)
(5 A/div)
(100 mV/div)
Figure 22. Transient Response to Step Decrease in
Load from 50% to 25% of Full Load
(VI = 48 Vdc).
Figure 19. Input Voltage and Current Characteristics.
TIME, t (1 ms/div)
TIME, t (1 µs/div)
Figure 21. Output Ripple Voltage (IO = IO, max).
Lineage Power
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).
14
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Electrical Specifications (continued)
Output Specifications for the QRW025A0F (Vo = 3.3Vdc)
Device
Symbol
Min
Typ
Max
Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)
Parameter
F
Vo
3.24
3.3
3.36
Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
F
Vo
3.2
—
3.4
Vdc
F
—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
—
—
—
—
30
100
mVrms
mVp-p
—
30,000
µF
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)
F
External Load Capacitance
Output Current
(Vo =90% of VO, nom.)
F
IO
0.0
—
25
Adc
Output Current-limit Inception
(VO = 90% of VO, set)
F
IO, lim
—
28
—
Adc
η
—
91
—
%
fSW
—
300
—
kHz
Output Short-circuit Current (Average)VO = 0.25 V
Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C
Switching Frequency
All
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)
5
200
5
200
mV
µs
mV
µs
Isolation Specifications
Symbol
Min
Typ
Max
Isolation Capacitance
Parameter
Ciso
—
5600
—
Unit
PF
Isolation Resistance
Riso
10
—
—
MW
General Specifications
Parameter
Min
Calculated MTBF (IO = 80% of IO, max TA = 40 °C)
Weight
Lineage Power
Typ
Max
1,548,000
—
37(1.31)
Unit
Hours
—
g (oz.)
15
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
Parameter
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
OvertemperaWuUe Protection (IO = IO, max)
Symbol
Min
Typ
Max
Unit
Von/off
Ion/off
0
—
—
—
1.2
1.0
V
mA
Von/off
Ion/off
—
—
—
—
2
15
50
4
V
µA
ms
—
—
—
80
—
—
10
110
VO, ovsd
Tref1
3.8
—
—
127
4.6
—
%V0,nom
%V0,nom
V
°C
* A Minimum OFF Period of 1 sec is recommended.
Lineage Power
16
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
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
I O = 25 A
I O = 12 .5 A
I O = 2.5 A
INPUT CURRENT, II (A)
2 .5
2
1 .5
1
0 .5
0
0
10
20
30
40
50
60
70
IN P U T V OL T A G E , V I (V )
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
Figure 25. Input Voltage and Current Characteristics.
Figure 28. Transient Response to Step Decrease in
Load from 50% to 25% of Full Load
(VI = 48 Vdc).
95
EFFICENCY, η (%)
90
85
VI = 36 V
VI = 48 V
VI = 75 V
80
75
70
0
5
10
15
20
25
30
OUTPUT CURRENT, IO (A)
Figure 26. Converter Efficiency vs. Output Current.
OUTPUT VOLTAGE (V) REMOTE ON/OFF
(1 V/div)
VON/OFF (V)
OUTPUT VOLTAGE, VO (V)
(50 mV/div)
36V, 25A
Figure 29. Transient Response to Step Increase in Load
from 50% to 75% of Full Load
(VI = 48 Vdc).
48V, 25A
75V, 25A
TIME, t (2 ms/div)
TIME, t (2µs/div)
Figure 27. Output Ripple Voltage (IO = IO, max).
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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).
17
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Test Configurations
Design Considerations
TO
OSCILLOSCOPE
Input Source Impedance
CURRENT
PROBE
LTEST
12 μH
VI(+)
CS 220 μF
ESR < 0.1 Ω
@ 20 ºC 100 kHz
BATTERY
VI(–)
Note:Measure input reflected-ripple current with a simulated
source inductance (LTEST) of 12 µH. Capacitor CS offsets possible battery impedance. Measure current as
shown above.
Figure 31. Input Reflected-Ripple Test Setup.
COPPER STRIPS
VO(+)
1.0 μF
10 μF SCOPE
RESISTIVE
LOAD
VO(-)
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.
Figure 32. Peak-to-Peak Output Noise Measurement Test
Setup.
SENSE(+)
VI(+)
CONTACT AND
DISTRIBUTION LOSSES
VO(+)
IO
II
SUPPLY
LOAD
VI(–)
CONTACT
RESISTANCE
VO(–)
SENSE(–)
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.
[ V O (+) – V O (-) ]I O
η = ⎛ ----------------------------------------------⎞ × 100 %
⎝ [ V I (+) – V I (-) ]I I ⎠
Figure 33. Output Voltage and Efficiency Measurement.
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.
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. Tp 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 load-dependant. Lineage
provides Web-based tools to assist the power module enduser 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 standards; 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.
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
requirements for SELV, then:
n
Lineage Power
The output may be considered SELV. Output voltages will
18
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
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
n
n
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, 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.
Lineage Power
19
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Feature Descriptions
[Vo(+) – Vo(-)] – [SENSE(+) – SENSE(-)] £ 10% of Vo, rated
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.
Ion/off
+
SENSE(+)
VO(+)
LOAD
VI(+)
VI(–)
VO(–)
SENSE(–)
Figure 34. Remote On/Off Implementation.
Remote Sense
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.:
Lineage Power
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(–)
SUPPLY
II
CONTACT
RESISTANCE
VI(+)
VO(+)
VI(–)
VO(–)
IO
LOAD
CONTACT AND
DISTRIBUTION LOSSES
Figure 35. Effective Circuit Configuration for
Single-Module Remote-Sense Operation
Output Voltage.
Output Overvoltage Protection
ON/OFF
Von/off
–
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.
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
These modules feature an overtemperature protection circuit
to safeguard against thermal damage. The circuit shuts
down and latches off the module when the maximum device
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.
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
For Output Voltage: 1.2V
VI(+)
ON/OFF
CASE
VI(–)
VO(+)
SENSE(+)
TRIM
Radj-down
RLOAD
SENSE(–)
VO(–)
Figure 36. Circuit Configuration to Decrease Output
Voltage.
VI(+)
ON/OFF
CASE
VI(–)
VO(+)
SENSE(+)
TRIM
Radj-up
RLOAD
SENSE(–)
VO(–)
Figure 37. Circuit Configuration to Increase Output
Voltage.
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.
Lineage Power
21
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Data Sheet
August 23, 2010
Thermal Considerations
versus local ambient temperature (TA) for natural convection
through 2 m/s (400 ft./min.).
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.
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.)
1
Note:Top view, pin locations are for reference only.
OUTPUT CURRENT, IO (A)
40
Table 1. Device Temperature
Output Voltage
1.2V
1.5V
1.8V
2.5V
3.3V
Device
Tref1
Tref1
Tref1
Tref1
Tref1
Temperature (°C)
114
111
117
117
117
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
module without exceeding the maximum case temperature
Lineage Power
25
20
15
10
5
30
40 50
60
70
80 90
LOCAL AMBIENT TEMPERATURE, TA (°C)
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
OUTPUT CURRENT, IO (A)
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.
30
0
20
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.
35
35
30
25
20
15
10
5
0
20
30
40 50
60 70
80
90
LOCAL AMBIENT TEMPERATURE, TA (°C)
Figure 40. Output Power Derating for QRW025A0M (Vo
= 1.5V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.
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.
OUTPUT CURRENT, IO (A)
40
35
30
25
20
15
10
5
0
20
30
40 50
60 70
80
90
LOCAL AMBIENT TEMPERATURE, TA (°C)
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
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
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
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
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Recommended Hole Pattern
Dimensions are in millimeters and (inches).
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
August 23, 2010
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Ordering Information
Please contact your Lineage Power Sales Representative for pricing, availability and optional features.
Table 1. Product Codes
Input Voltage
Output
Voltage
Output
Current
Efficiency
Connector Type
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
48V (36-75Vdc)
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
2.5V
2.5V
1.8V
1.8V
1.5V
1.5V
1.2V
1.2V
25A
25A
25A
25A
25A
25A
25A
25A
25A
25A
25A
25A
25A
25A
25A
91%
91%
91%
91%
91%
91%
91%
90%
90%
88%
88%
87%
87%
85%
85%
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Through hole
Product Codes
QRW025A0F1
QRW025A0F4
QRW025A0F41
QRW025A0F1Z
QRW025A0F1-H
QRW025A0F41-H
QRW025A0F1-HZ
QRW025A0G41
QRW025A0G1-H
QRW025A0Y4
QRW025A0Y61
QRW025A0M41-H
QRW025A0M641-H
QRW025A0P1
QRW025A0P1Z
Comcodes
108965765
108974809
108969213
CC109101482
108968918
108981267
CC109153053
108971656
108972126
108974825
108975483
108986373
CC109155297
108965799
CC109139515
Table 2. Device Options
Character and Position
Ratings
Characteristic
Form Factor
Family Designator
Input Voltage
Output Current
Output Voltage
Q
R
W
025A0
F
G
Y
M
P
Options
Pin Length
Action following
Protective Shutdown
On/Off Logic
Mechanical Features
Customer Specific
RoHS
Definition
Q = Quarter Brick
Family Designator
W = W ide Range, 36V-75V
025A0 = 025.0 Amps Maximum Output Current
F =3.3V nominal
G =2.5V nominal
Y =1.8V nominal
M =1.5V nominal
P =1.2V nominal
Omit = Default Pin Length shown in Mechanical Outline Figures
8 = Pin Length: 2.79 mm ± 0.25mm , (0.110 in. ± 0.010 in.)
7 = Case Pin (only available with H option)
6 = Pin Length: 3.68 mm ± 0.25mm , (0.145 in. ± 0.010 in.)
Omit = Latching Mode
4 = Auto-restart following shutdown (Overcurrent/Overvoltage)
Omit = Positive Logic
1 = Negative Logic
8
7
6
4
1
H
Omit = Standard open Frame Module
H = Heat plate, for use with heat sinks or cold-walls
XY
XY = Customer Specific Modified Code, Omit for Standard Code
Omit = RoHS 5/6, Lead Based Solder Used
Z Z = RoHS 6/6 Compliant, Lead free
Asia-Pacific Headquarters
Tel: +65 6593 7211
World Wide Headquarters
Lineage Power Corporation
601 Shiloh Road, Plano, TX 75074, USA
+1-800-526-7819
(Outside U.S.A.: +1-972-244-9428)
www.lineagepower.com
e-mail: techsupport1@lineagepower.com
Europe, Middle-East and Africa Headquarters
Tel: +49 89 878067-280
India Headquarters
Tel: +91 80 28411633
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.
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.
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