Data Sheet
March 27, 2008
QRW025 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
Document Name:
PDF Name:qrw025-series_ds.pdf
Applications
n
Enterprise Networks
n
Wireless Networks
n
Access and Optical Network Equipment
n
Enterprise Networks
n
Latest generation IC’s (DSP, FPGA, ASIC) and Micropro-
cessor-powered applications.
Options
n
Positive Remote On/Off logic
n
Case ground pin (-H Base plate version)
n
Auto restart after fault shutdown
Features
n
Compatible with RoHS EU Directive 200295/EC (-Z Ver-
sions)
n
Compatible in RoHS EU Directive 200295/EC with lead
solder exemption (non -Z versions)
n
Delivers up to 25A output current
n
Ultra High efficiency: 91% at 3.3V full load
n
Industry standard Quarter Brick:
57.9 mm x 36.8 mm x 9.5 mm
(2.28 in x 1.45 in x 0.375 in)
n
Improved Thermal performance
25A at 70°C at 1ms-1 (200LFM) for 3.3Vo
n
High power density
n
Low output ripple and noise
n
Low output voltages down to 1V:
Supports migration to future IC and microprocessor supply
voltages
n
2:1 input voltage
n
Remote Sense
n
Remote On/Of f
n
Constant switching frequency
n
Output overvoltage and Overcurrent protection
n
Overtemperature protection
n
Adjustable output voltage (+10% / -20%)
n
Meets the voltage and current requirements for
ETSI 300-132-2 and complies with and is approved for
Basic Insulation rating per EN60950-1
n
UL* 60950 Recognized, CSA† C22.2 No. 60950-00 Certi-
fied, and VDE‡ 0805 (IEC60950, 3rd edition) Licensed
n
CE mark meets 73/23/EEC and 93/68/EEC directives§
n
ISO** 9001 certified manufacturing facilities
RoHS Compliant
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 rectifi-
cation technology and innovative packaging techniques to achieve high efficiency reaching 91% at 3.3V full load. Thanks to
the ultra high ef fi ci ency of this c on v e rter, 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.
* 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 the required procedures for CE marking of end-use equipment should be followed. (The CE mark is placed on selected products.)
** ISO is a registered trademark of the Internation Organization of Standards
Lineage Power 2
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
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 condition s 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.
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
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 application s , 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.
Parameter Device Symbol Min Max Unit
Input Voltage:Continuous
Transient (100ms) 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
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) All — — 2.8m n Adc
Inrush Transient All I2t1A
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
Lineage Power 3
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Electrical Specifications (continued)
Output S pecifications for the QRW025A0P (Vo = 1.2Vdc)
Isolation Specifications
General Specifications
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
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
P—
—
—
—
—
—
0.05
0.05
5
0.3
0.3
20
%, VO, set
%, VO, set
mV
Output Ripple and Noise
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth) P—
——
—30
100 mVrms
mVp-p
External Load Capacitance — 25,000 µF
Output Current
(Vo =90% of VO, nom.) PIO0.0—25Adc
Output Current-limit Inception
(VO = 90% of VO, set) P IO, lim — 29 — Adc
Output Short-circuit Current (Average)VO = 0.25 V Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C η—85— %
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)
8
200
8
200
mV
µs
mV
µs
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso — 5600 — PF
Isolation Resistance Riso 10 — — MW
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 4
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
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)
Von/off
Ion/off
Von/off
Ion/off
0
—
—
—
—
—
—
—
2
1.2
1.0
15
50
4
V
mA
V
µA
ms
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim) —
——
80 —
—10
110 %VO,rated
%V0,nom
Output Overvoltage Protection VO, ovsd 1.42 — 1.58 V
Overtemperaute Protection (IO = IO, max) Tref1 — 127 — °C
Lineage Power 5
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Characteristic Curves
The following figures provi de 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.
Figure 1. Input Voltage and Current Characteristics.
Figure 2. Converter Efficiency vs. Output Current.
Figure 3. Output Ripple Voltage (IO = IO, max).
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).
Figure 5. T ran sient Re sponse to St ep Incr ease in Load
from 50% to 75% of Full Load (VI = 48 Vdc).
Figure 6. Start-up from Remote On/Off (IO = IO, max).
INPUT VOLT A GE, V
I
(V)
0 102030405060708
0
0.2
0.4
0.6
0.8
1
1.2
0
INPUT CURRENT, I
I
(A)
I
O
= 25A
I
O
= 12.5A
I
O
= 2.5A
0 5 10 15 20 25 3
0
100
90
80
70
60
50
40
30
20
10
0
OUTPUT CURRENT, I
O
(A)
EFFICIENCY, η (%)
VI = 75V
VI = 48V
VI = 36V
TIME, t (1 µs/div)
OUTPUT V OLTAGE, V
O
(V)
(20 mV/div)
36V, 25A
48V, 25A
75V, 25A
TIME, t, (.2 µs/div)
OUTPUT CURRENT, I
O
(A)
(5 A/div) OUTPUT V OLT A GE, VO (
V)
(50 mV/div)
TIME, t, (.2 µs/div)
OUTPUT CURRENT, I
O
(A)
(5 A/div) OUTPUT V OLTAGE, V
O
(V
)
(50 mV/div)
0.5
Lineage Power 6
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Electrical Specifications (continued)
Output Specifications for the QRW025AOM (Vo = 1.5Vdc)
Isolation Specifications
General Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C) MVo1.471.51.52Vdc
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
MVo1.45—1.55Vdc
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
M—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
Output Ripple and Noise
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth) M—
——
—20
100 mVrms
mVp-p
External Load Capacitance — 25,000 µF
Output Current
(Vo =90% of VO, nom.) MIO0.0—25Adc
Output Current-limit Inception
(VO = 90% of VO, set) M IO, lim — 30 — Adc
Output Short-circuit Current (Average)VO = 0.25 V Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C η—87— %
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)
6
200
6
200
mV
µs
mV
µs
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso — 5600 — PF
Isolation Resistance Riso 10 — — MW
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 7
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
See Feature Descriptions for additional information .
* A Minimum OFF Period of 1 sec is recommended.
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)
Von/off
Ion/off
Von/off
Ion/off
0
—
—
—
—
—
—
—
2
1.2
1.0
15
50
4
V
mA
V
µA
ms
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim) —
——
80 —
—10
110 %VO,rated
%V0,nom
Output Overvoltage Protection VO, ovsd 1.69 — 2.07 V
Overtemperaute Protection (IO = IO, max) Tref1 — 127 — °C
Lineage Power 8
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Characteristic Curves
The following figures provide typical characteristics curves for the QRW025A0M (VO = 1.5 V) module at room temperature
(TA = 25 °C)
Figure 7. Input Voltage and Current Characteristics.
Figure 8. Converter Efficiency vs. Output Current.
Figure 9. Output Ripple Voltage (IO = IO, max).
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
Figure 10. Transien t Response to Step Decrease in
Load from 50% to 25% of Full Load (VI = 48
Vdc).
Figure 11. Transient Response to Step Increase in
Load from 50% to 75% of Full Load (VI = 48
Vdc).
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).
0
0.2
0.4
0.6
0.8
1
1.2
1.4
25 35 45 55 65 7
5
IO = 0 A
IO = 12.5 A
IO = 25 A
INPUT VOLTAGE, V
I
(V)
INPUT CURRENT, I
I
(A)
70
72
74
76
78
80
82
84
86
88
90
0 5 10 15 20 2
5
V
I
= 36 V
V
I
= 48 V
V
I
= 75 V
OUTPUT CURRENT, I
O
(A)
EFFICIENCY η (%)
TIME, t (1 µs/div)
OUTPUT V OLTAGE,
VO (V) (20 mV/idv)
75V, 25A
48V, 25A
36V, 25A
OUTPUT V OLTAGE
V
O
(V) (100 mV/idv
OUTPUT CURRENT,
I
O
(A) (5 A/div)
TIME, t (50 µs/div)
OUTPUT V OLTAGE
,
V
O
(V) (100 mV/idv
)
OUTPUT CURRENT,
I
O
(A) (5 A/div)
0.
Lineage Power 9
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Electrical Specifications (continued)
Output S pecifications for the QRW025A0Y (Vo = 1.8Vdc)
Isolation Specifications
General Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C) 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
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
Y—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
Output Ripple and Noise
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth) Y—
——
—35
100 mVrms
mVp-p
External Load Capacitance — 25,000 µF
Output Current
(Vo =90% of VO, nom.) YIO0.0—25Adc
Output Current-limit Inception
(VO = 90% of VO, set) Y IO, lim — 30 — Adc
Output Short-circuit Current (Average)VO = 0.25 V Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C η—88— %
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)
8
200
8
200
mV
µs
mV
µs
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso — 5600 — PF
Isolation Resistance Riso 10 — — MW
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 10
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temp erature conditions.
See Feature Descriptions for additional information.
* A Minimum OFF Period of 1 sec is recommended.
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)
Von/off
Ion/off
Von/off
Ion/off
0
—
—
—
—
—
—
—
4
1.2
1.0
15
50
8
V
mA
V
µA
ms
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim) —
——
80 —
—10
110 %VO,rated
%V0,nom
Output Overvoltage Protection VO, ovsd 2.0 — 2.5 V
Overtemperaute Protection (IO = IO, max) Tref1 — 127 — °C
Lineage Power 11
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Characteristic Curves
The following figures provi de typical characteristics curves for the QRW025A0Y (VO = 1.8 V) module at room temperature (TA
= 25 °C)
Figure 13. Input Voltage and Current Characteristics.
Figure 14. Converter Efficiency vs. Output Current.
Figure 15. Output Ripple Voltage (IO = IO, max).
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 Fu ll Load
(VI = 48 Vdc).
Figure 17. T ra nsien t Respon se to S tep Increas e in Load
from 50% to 75% of Full Load
(VI = 48 Vdc).
Tested with a 10µF aluminium and a 1.0µF tantalum cap acitor across
the load.
Figure 18. Start-up from Remote On/Off (IO = IO, max).
25 30 35 40 45 50 55 60 65 70 7
5
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
I
O
= 25 A
I
O
= 12.5 A
I
O
= 0 A
INPUT V OLTAGE, V
I
(V)
INPUT CURRENT, I
I
(A)
0 5 10 15 20 2
5
90
88
86
84
82
80
78
76
74
72
70
VI = 75 V
VI = 48 V
VI = 36 V
OUTPUT CURRENT, I
O
(A)
EFFICENCY, η (%)
TIME, t (1 µs/div)
OUTPUT V OLTAGE, V
O
(V)
(50 mV/div)
VI = 36 V
VI = 48 V
VI = 75 V
TIME, t (100 µs/div)
O
UTPUT CURRENT, I
O
(A)
(10 A/div) OUTPUT VOLTAGE, V
O
(V)
(100 mV/div)
TIME, t (100 µs/div)
OUTPUT CURRENT, I
O
(A)
(10 A/div) OUTPUT VOLTAGE, V
O
(V
)
(100 mV/div)
TIME, t (2 ms/div)
REMOTE ON/OFF,
V
ON/OFF
(V) OUTPUT VOLTAGE, (V)
(0.5 V/div)
Lineage Power 12
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Electrical Specifications (continued)
Output Specifications for the QRW025A0G (Vo = 2.5Vdc)
Isolation Specifications
General Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C) 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
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
G—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
Output Ripple and Noise
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth) G—
——
—35
100 mVrms
mVp-p
External Load Capacitance — 25,000 µF
Output Current
(Vo =90% of VO, nom.) GIO0.0—25Adc
Output Current-limit Inception
(VO = 90% of VO, set) G IO, lim — 30 — Adc
Output Short-circuit Current (Average)VO = 0.25 V Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C η—90— %
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)
5
200
5
200
mV
µs
mV
µs
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso — 5600 — PF
Isolation Resistance Riso 10 — — MW
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 13
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temp erature conditions.
See Feature Descriptions for additional information.
* A Minimum OFF Period of 1 sec is recommended.
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 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)
Von/off
Ion/off
Von/off
Ion/off
0
—
—
—
—
—
—
—
2
1.2
1.0
15
50
4
V
mA
V
µA
ms
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim) —
——
80 —
—10
110 %VO,rated
%V0,nom
Output Overvoltage Protection VO, ovsd 2.9 — 3.2 V
Overtemperaute Protection (IO = IO, max) Tref1 — 127 — °C
Lineage Power 14
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Characteristic Curves
The following figures provide typical characteristics curves for the QRW025A0G (VO = 2.5 V) module at room temperature (T A
= 25 °C)
Figure 19. Input Voltage and Current Characteristics.
Figure 20. Converter Efficiency vs. Output Current.
Figure 21. Output Ripple Voltage (IO = IO, max).
Tested with a 220µF aluminium and a 1.0µF ceramic capacitor
across the load.
Figure 22. Transien t Response to Step Decrease in
Load from 50% to 25% of Full Load
(VI = 48 Vdc).
Figure 23. Transien t R esponse to Step Increase in
Load from 50% to 75% of Full Load
(VI = 48 Vdc).
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).
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
25 35 45 55 65 7
5
INPUT VOLTAGE, VI (V)
INPUT CURRENT, I
I
(A)
IO = 25 A
IO = 12.5 A
IO = 0 A
70
75
80
85
90
95
0 5 10 15 20 2
5
OUTPUT CURRENT, I
O
(A)
EFFICIENCY η (%)
V
I
= 36 V
V
I
= 48 V
V
I
= 75 V
TIME, t (1 µs/div)
OUTPUT VOLTAGE, V
O
(V)
(50 mV/div)
TIME, t (100 µs/div)
OUTPUT CURRENT, IO (A)
(5 A/div) OUTPUT VOLTAGE, VO (
V)
(100 mV/div)
TIME, t (100 µs/div)
OUTPUT CURRENT, IO (A)
(5 A/div) OUTPUT VOLTAGE, VO (
V)
(100 mV/div)
TIME, t (1 ms/div)
REMOTE ON/OFF,
Von/off (V)
OUTPUT VOLTAGE, V
O
(V)
(1 V/div)
Lineage Power 15
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Electrical Specifications (continued)
Output S pecifications for the QRW025A0F (Vo = 3.3Vdc)
Isolation Specifications
General Specifications
Parameter Device Symbol Min Typ Max Unit
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C) 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
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
F—
—
—
—
—
—
0.05
0.05
15
0.2
0.2
50
%, VO, set
%, VO, set
mV
Output Ripple and Noise
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth) F—
——
—30
100 mVrms
mVp-p
External Load Capacitance — 30,000 µF
Output Current
(Vo =90% of VO, nom.) FIO0.0—25Adc
Output Current-limit Inception
(VO = 90% of VO, set) F IO, lim — 28 — Adc
Output Short-circuit Current (Average)VO = 0.25 V Latched off
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C η—91— %
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)
5
200
5
200
mV
µs
mV
µs
Parameter Symbol Min Typ Max Unit
Isolation Capacitance Ciso — 5600 — PF
Isolation Resistance Riso 10 — — MW
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 16
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Feature Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See
Feature Descriptions for additional information.
* A Minimum OFF Period of 1 sec is recommended.
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)
Von/off
Ion/off
Von/off
Ion/off
0
—
—
—
—
—
—
—
2
1.2
1.0
15
50
4
V
mA
V
µA
ms
Output Voltage Adjustment
(See Feature Descriptions):
Output Voltage Remote-sense Range
Output Voltage Set-point Adjustment Range (trim) —
——
80 —
—10
110 %V0,nom
%V0,nom
Output Overvoltage Protection VO, ovsd 3.8 — 4.6 V
Overtemperaute Protection (IO = IO, max) Tref1 — 127 — °C
Lineage Power 17
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Characteristic Curves
The following figures provide typical characteristics curves for the QRW025A0F (VO = 3.3 V) module at room temperature (TA =
25 °C)
Figure 25. Input Voltage and Current Characteristics.
Figure 26. Converter Efficiency vs. Output Current.
Figure 27. Output Ripple Voltage (IO = IO, max).
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 Fu ll Load
(VI = 48 Vdc).
Figure 29. T ra nsien t Respon se to S tep Increas e in Load
from 50% to 75% of Full Load
(VI = 48 Vdc).
Tested with a 10µF aluminium and a 1.0µF tantalum cap acitor across
the load.
Figure 30. Start-up from Remote On/Off (IO = IO, max).
0
0.5
1
1.5
2
2.5
3
3.5
0 10203040506070
INPUT VO LTAGE, V
I
(V )
INPUT CURRENT, I
I
(A)
I
O
= 25 A
I
O
= 12.5 A
I
O
= 2.5 A
70
75
80
85
90
95
0 5 10 15 20 25 30
OUTPUT CURRENT, I
O
(A)
EFFICENCY,
η
(% )
V
I
= 36 V
V
I
= 48 V
V
I
= 75 V
TIME, t (2
µ
s/div)
OUTPUT VOLTAGE, V
O
(V)
(50 mV/div)
36V, 25A
48V, 25A
75V, 25A
TIME, t (2 ms/div)
OUTPUT V OLTAGE (V)
(1 V/div) REMOTE ON/OFF
V
ON/OFF
(V)
Lineage Power 18
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Test Configurations
Note:Measure input reflected-ripple current with a simulated
source inductance (LTEST) of 12 µH. Capacitor CS off-
sets possible battery impedance. Measure current as
shown above.
Figure 31. Input Reflected-Ripple Test Setup.
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 .) fro m the modul e.
Figure 32. Peak-to-Peak Output Noise Measurement Test
Setup.
Note:All measurements are taken at the module terminals.
When socketing, place Kelvin con nections at module
terminals to avoid measurement errors due to socket
contact resistance.
Figure 33. Output Voltage and Efficiency Measurement.
Design Considerations
Input Source Impedance
The power module should be connected to a low
ac-impedance input source. Highly inductive source imped-
ances 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 imped-
ances, consult the factory for further application guideli nes.
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 tran-
sient.
Output capacitance and load impedance interact with the
power module’s output volt age 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-
ated E.S.R. may be dictated, depending on the module’s con-
trol 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-
user in appraising and adjusting the effect of various load
conditions and output capacitances on specific power mod-
ules 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 com-
pliance 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-
dards; and 1500 Vdc is applied from VI to VO to 100% of out-
going production.
For end products connected to –48 Vdc, or –60 Vdc nomianl
DC MAINS (i.e. central offic e 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
The output may be considered SELV. Output voltages will
V
I
(+)
V
I
(–)
CURRENT
PROBE
TO
OSCILLOSCOPE
L
TEST
12
μ
H
BATTERY C
S
220
μ
F
ESR < 0.1
Ω
@ 20 ºC 100 kHz
COPPER STRIPS
1.0
μ
F10
μ
FSCOPE
V
O
(+)
RESISTIVE
V
O
(-)
LOAD
CONTACT AND
SUPPLY I
I
CONTACT
V
I
(+)
V
I
(–)
V
O
(+) DISTRIBUTION LOSSES
RESISTANCE
I
O
LOAD
V
O
(–)
SENSE(–)
SENSE(+)
ηVO(+) VO(-)–[]IO
VI(+) VI(-)–[]II
----------------------------------------------
⎝⎠
⎛⎞
100 %×=
Lineage Power 19
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
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 pol e of the output are to be
grounded, or both circuits are to be kept floating, to main-
tain the output voltage to ground voltage within ELV or
SELV limits.
For all input sources, other th an 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 evaluate d for SELV:
n
The input source is to be provided with reinforced insula-
tion from any hazardous voltage, including th e 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 combi-
nation 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 EL V (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 thick-
nesses. The input to these units is to be provided with a max-
imum 10A normal-blow fuse in the ungrounded lead.
Lineage Power 20
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
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 per-
sists for few seconds, the module will shut down and remain
latch-off.
The overcurrent latch is reset by either cycling the inpu t
power or by toggling the on/off pin for one second. If the out-
put 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 volt-
age 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 col-
lector or equivalent (see Figure 10). A logic low is V on/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 cur-
rent 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.
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 ter-
minals must not exceed the output voltage sense range
given in the Feature Specifications table i.e.:
[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 com-
pensation and output voltage set-point adjustme nt (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(+) an d
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 volt-
age of the module can be increased, which at the same out-
put 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 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 fo r one sec-
ond.
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 sec-
ond or by toggling the remote on/off signal for at least one
second.
SENSE(+)
V
O
(+)
SENSE(–)
V
O
(–)
V
I
(–)
+
–
I
on/off
ON/OFF
V
I
(+)
LOAD
V
on/off
SENSE(+)
SENSE(–)
VI(+)
VI(–)
IOLOAD
CONTACT AND
SUPPLY II
CONTACT
VO(+)
VO(–)
DISTRIBUTION LOSSESRESISTANCE
Lineage Power 21
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Feature Descriptions (Continued)
Output Voltage Set-Point Adjustment (Trim)
Trimming allows the user to incre ase or decrease the output
voltage set point of a module. This is accomplished by con-
necting 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 deter-
mines the required external-resistor value to obtain a per-
centage 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 equ ation determines the re quired external-
resistor value to obtain a percentage output voltage change
of D%
For Output Voltage: 1.5V - 12V
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 com-
pensation 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 multipl ied by the output
current. When using remote sense and trim, the output volt-
age of the module can be increased, which at the same out-
put 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 36. Circuit Configuration to Decrease Output
Voltage.
Figure 37. Circuit Configur ati on to Increase Out pu t
Voltage.
VI
(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–) Radj-down RLOAD
VI
(+)
VI(–)
ON/OFF
CASE
VO(+)
VO(–)
SENSE(+)
TRIM
SENSE(–)
Radj-up RLOAD
Lineage Power 22
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Thermal Considerations
The power modules operate in a variety of thermal environ-
ments; however, sufficient cooling should be pr ovided 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 temperatur e of selected components on
the topside of the power module (See 38). Peak temperature
(T ref) can occur at any of these positions indicated in Figure
50.
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 shou ld not exceed
the rated power for the module as listed in the Ordering
Informati on table.
Although the maximum Tref temperature of the power mod-
ules is per Table 1, you can limit these temperatures to a
lower value for extremely high reliability.
Table 1. Device Temperature
Heat Transfer Without Heat Sinks
Increasing airflow over the module enhances the heat trans-
fer via convection. Figures 39 through 43 shows the maxi-
mum current that can be delivered by the corresponding
module without exceeding the maximum case temperature
versus local ambient temperature (T A) 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, sys-
tems 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 sys-
tem. 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 maxi-
mum 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.)
Figure 39. Output Power Derating for QRW025A0P (Vo =
1.2V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.
Figure 40. Output Power Derating for QRW025A0M (Vo
= 1.5V) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.
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
1
40
35
30
25
20
15
10
5
020 30 40 50 60 70 80 90
LOCAL AMBIENT TEMPERATURE, T (°C)
A
OUTPUT CURRENT , I (A)
O
40
35
30
25
20
15
10
5
020 30 40 50 60 70 80 90
LOCAL AMBIENT TEMPERA TURE, T (°C)
A
OUTPUT CURRENT, I (A)
O
Lineage Power 23
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
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.
Figure 43. Output Power Derating for QRW025A0F (V o =
3.3) in Transverse Orientation with No
Baseplate; Airflow direction from VIN (+) to
VIN (–); VIN = 48V.
40
35
30
25
20
15
10
5
020 30 40 50 60 70 80 90
LOCAL AMBIENT TEMPERA TURE, T (°C)
A
OUTPUT CURRENT, I (A)
O
Lineage Power 24
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
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 Side label includes Lineage name, product designation, and data code.
†Optional Features, Pin is not present unless one of these options is specified.
Top View
Side View
Bottom View
Lineage Power 25
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Recommended Hole Pattern
Dimensions are in millimeters and (inches).
Lineage Power 26
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Through-Hole Lead-Free Soldering Infor-
mation
The RoHS-compliant through-hole products use the SAC
(Sn/Ag/Cu) Pb-free solder and RoHS-compliant compo-
nents. They are designed to be processed through single or
dual wave soldering machines. The pins have an RoHS-
compliant 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 prehe at pro cess should be such
that the temp erature of the power module board is kept
below 210°C. For Pb solder, the recommende d pot temper-
ature is 260°C, while the Pb-free solder pot is 270°C max.
Not all RoHS-compliant through-hole products can be pro-
cessed with paste-through-hole Pb or Pb-free reflow pro-
cess. 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-bo ard
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).
Document No:
PDF Name:qrw025-series_ds.pdf
Data Sheet
March 27, 2008 36 Vdc - 75 Vdc Input, 1.2 to 3.3 Vdc Output; 25A
QRW025 Series Power Modules; dc-dc Converters
Note: Legacy device codes may contain a -B option suffix to indicate 100% factory Hi-
Pot tested to the isolation voltage specified in the Absolute Maximum Ratings table.
The 100% Hi-Pot test is now applied to all device codes, with or without the -B option
suffix. Existing comcodes for devices with the -B suffix are still valid; however, no new
comcodes for devices containing the -B suffix will be created.
World Wide Headquarters
Lineage Power Corporation
3000 Skyline Drive, Mesquite, TX 75149, US A
+1-800-526-7819
(Outsid e U .S.A .: +1-97 2-2 84 -2626)
www.line agepower.com
e-m ail: techsupport1@lineagepower .com
A sia-Pacific Headquarters
Tel: +65 6 41 6 4283
Europe, Middle-East and Africa Headquar ters
Tel: +49 8 9 6089 286
Ind ia Headqu arters
Tel: +91 8 0 28411633
Lineage Power reserves the right to m ake changes to the produc t(s) or inform ation contained herein without notice. No liability is ass um ed as a res ult of their use or
applic ation. No rights under any patent acc om pany the sale of any s uc h pr oduct(s ) or information.
© 2008 Lineage Pow er C orpor ation, (M esquite, Texas ) All International Rights Res erved.
Ordering Information
For assistance in ordering, please contact your Lineage Power Account Manager or Field Application Engi-
neer for pricing and availability.
Optional features can be ordered using the suffixes shown in table below. The suffixes follow the last letter of the device code
and are placed in descending order. For example, the device codes for a QRW025A0P1 module with the follow ing options are
shown bel o w:
Auto-restart after over current shutdown QRW025A0F41
Input Voltage Output
Voltage Output
Current Efficiency Connector Type Device Code Comcodes
48V (36-75Vdc) 1.2V 25A 85% Through hole QRW025A0P1 108965799
48V (36-75Vdc) 1.5V 25A 87% Through hole QRW025A0M1 108965781
48V (36-75Vdc) 1.8V 25A 88% Through hole QRW025A0Y1 108965807
48V (36-75Vdc) 2.5V 25A 90% Through hole QRW025A0G1 108965773
48V (36-75Vdc) 3.3V 25A 91% Through hole QRW025A0F 108965955
48V (36-75Vdc) 3.3V 25A 91% Through hole QRW025A0F1 108965765
48V (36-75Vdc) 3.3V 25A 91% Through hole QRW025A0F1-H 108968918
48V (36-75Vdc) 3.3V 25A 91% Through hole QRW025A0F71-H 108 968926
48V (36-75Vdc) 3.3V 25A 91% Through hole QRW025A0F1Z CC109101482
48V (36-75Vdc) 2.5V 25A 90% Through hole QRW025A0G1-HZ CC10 9107488
Option Suffix
Negative Logic remote on/off 1
Auto-restart after fault shutdown 4
Base plate version for Heat Sink attachment –H
Pin Length: 3.68 mm ± 0.25 mm
(0.145 in. ± 0.010 in) 6
Case Pin (Only available with –H option) 7
Pin Length: 2.79 mm ± 0.25 mm
(0.110 in. ± 0.010 in) 8
RoHS compliant –Z