Data Sheet
August 24, 2010
QRW010/025/035/040 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.0 to 12 Vdc Output; 10 A to 40 A
RoHS Compliant
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 40A 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:
23A at 70ºC at 1m/s (200LFM) for 3.3Vo
High power density: 100W/in
3
Low output ripple and noise
Low output voltages down to 1V: Supports migration
to future IC and microprocessor supply voltages
2:1 input voltage
Remote Sense
Remote On/Off
Constant switching frequency
Output overvoltage and Overcurrent protection
Overtemperature protection
Adjustable output voltage (+10% / -20%)
Meets the voltage isolation requirements for
ETSI 300-132-2 and complies with and is licensed
for Basic Insulation rating per EN60950-1
UL**
60950-1 Recognised,
CSA
†
C22.2 No. 60950-
‡
rd
1-03 Certified, and
VDE
0805 (IEC60950, 3
Edition) Licensed
CE mark meets 2006/95/EC directive
§
Applications
Enterprise Networks
Wireless Networks
Access and Optical Network Equipment
Enterprise Networks
Latest generation IC’s (DSP, FPGA, ASIC) and
Microprocessor-powered applications.
Options
Positive Remote On/Off logic
Case ground pin (-H Base plate version)
Auto restart after fault shutdown
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 40A 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 ultra 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.
Document Name: DS03-113 ver.4.4
PDF name:
QRW035_Series.pdf
Data Sheet
August 24,
2010
QRW010/025/035/040 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.0 to 12 Vdc Output; 10 A to 40 A
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress
ratings only, functional operation of the device is not implied at these or any other conditions in excess of those given in the
operations sections of the data sheet. Exposure to absolute maximum ratings for extended periods can adversely affect the
device reliabiltiy.
Parameter
Input Voltage:Continuous
Transient (100ms)
Operating Ambient Temperature
(See Thermal Considerations section)
Storage Temperature
I/O Isolation Voltage (100% factory Hi-Pot tested)
When using optional case ground pin
(option 7)
Device
All
All
All
—
Symbol
VI
VI, trans
TA
Tstg
—
Min
—
—
–40
–55
1500
700
Max
80
100
85
125
Vdc
Vdc
Unit
Vdc
Vdc
°C
°C
Electrical Specifications
Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.
Parameter
Operating Input Voltage
Maximum Input Current
(VI = 0 V to 75 V; IO = IO, max)
Inrush Transient
Input Reflected Ripple Current, peak-peak
(5 Hz to 20 MHz, 12 µH source impedance
See Test configuration section)
Input Ripple Rejection (120 Hz)
Device
All
All
All
All
Symbol
VIN
Min
36
—
Typ
48
—
Max
75
4.5
1
Unit
Vdc
Adc
A
2
s
mAp-p
I
2
t
16
All
60
dB
CAUTION: This power module is not internally fused. An input line fuse must always be used.
This power module can be used in a wide variety of applications, ranging from simple 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.
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Data Sheet
August 24,
2010
QRW010/025/035/040 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.0 to 12 Vdc Output; 10 A to 40 A
Electrical Specifications
(continued)
Output Specifications for the QRW040A0S1R0 (Vo = 1.0Vdc)
Parameter
Output Voltage Set Point
(VI = 48 Vdc; IO = IO, min to IO, max, TA = 25 °C)
Output Voltage
(Over all operating input voltage, resistive load, and
temperature conditions at steady state until end of life.)
Output Regulation:
Line (VI = VI, min to VI, max)
Load (IO = IO, min to IO, max)
Temperature (TA = TA, min to TA, max)
Output Ripple and Noise
RMS (5 Hz to 20 MHz bandwidth)
Peak-to-peak (5 Hz to 20 MHz bandwidth)
External Load Capacitance
Output Current
(Vo =90% of VO, nom.)
Output Current-limit Inception
(VO = 90% of VO, set)
Output Short-circuit Current (Average)VO = 0.25 V
Efficiency
(VI = VIN, nom; IO = IO, max), TA = 25 °C
Switching Frequency
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)
All
P
P
Latched off
η
fSW
—
—
83
300
—
—
%
kHz
IO
IO, lim
0.0
—
Device
P
P
Symbol
Vo
Vo
Min
0.99
0.98
Typ
1.0
—
Max
1.01
1.02
Unit
Vdc
Vdc
P
—
—
—
—
—
—
—
—
0.1
0.1
15
—
—
—
—
49
0.3
0.3
50
30
80
25,000
40
—
%, VO, set
%, VO, set
mV
mVrms
mVp-p
µF
Adc
Adc
P
160
200
mV
µs
180
200
mV
µs
Isolation Specifications
Parameter
Isolation Capacitance
Isolation Resistance
Symbol
Ciso
Riso
Min
—
10
Typ
5600
—
Max
—
—
Unit
PF
MΩ
General Specifications
Parameter
Calculated MTBF (Io = 80% of
Io,
max Ta = 40 °C
Weight
—
Min
Typ
TBD
37(1.31)
—
Max
Unit
Hours
g (oz.)
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Data Sheet
August 24,
2010
Feature Specifications
QRW010/025/035/040 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.0 to 12 Vdc Output; 10 A to 40 A
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
Overtemperature Protection (IO = IO, max)
Symbol
Min
Typ
Max
Unit
Von/off
Ion/off
Von/off
Ion/off
0
—
—
—
—
—
—
—
2
1.2
1.0
15
50
4
V
mA
V
µA
ms
—
—
VO, ovsd
Tref1
—
80
1.25
—
—
—
—
127
10
110
1.5
—
%VO,rated
%V0,nom
V
°C
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Data Sheet
August 24, 2010
QRW010/025/035/040 Series Power Modules; dc-dc Converters
36 Vdc - 75 Vdc Input, 1.0 to 12 Vdc Output; 10 A to 40 A
Characteristic Curves
The following figures provide typical characteristics curves for the QRW040A0S1R0 (VO = 1.0 V) module at room temperature
(TA = 25 °C).The figures are identical for both on/off configurations.
OUTPUT CURRENT, Vo (V
(100 mv/div)
OUTPUT VOLTAGE, Io (A)
(10A/div)
TIME, t (0.1ms/div)
Tested with a 220µF aluminium and a 1.0µF ceramic
Figure 1.
Input Voltage and Current Characteristics.
88
84
82
80
78
76
74
72
70
0
5
10
15
20
25
30
35
40
capacitor across the load.
Figure 4.
86
Transient Response to Step decrease in
Load from 50% to 25% of Full Load (VI = 48
Vdc).
Figure 2.
Converter Efficiency vs. Output Current.
Figure 5.
OUTPUT VOLTAGE (V)
(0.5 V/div)
OUTPUT VOLTAGE, Io (A)
(10A/div)
OUTPUT CURRENT, Vo ( V)
(100 mv/div)
TIME, t (0.1ms/div)
Transient Response to Step Increase in Load
from 50% to 75% of Full Load (VI = 48 Vdc).
OUTPUT VOLTAGE, Vo (V)
(50 mV/div)
TIME, t (1.00 µs/div)
REMOTE ON/OFF
V on/off (V)
TIME, t (2ms/div)
Figure 3.
Output Ripple Voltage (IO = IO, max).
Figure 6.
Start-up from Remote On/Off (IO = IO, max).
5
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