Quarter-Brick Series
Dual output
DC/DC CONVERTERS
•
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•
•
•
•
•
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High Current, High Efficiency, Low Profile
NEW Product
1
Two independent outputs
High full load efficiency
Wide ambient temperature range of -40ºC to +85ºC
Up to 100% load imbalance
Tracking, monotonic start-up
Starts into pre-biased outputs
Basic insulation system
Over-voltage and over-temperature protection
100V, 100ms input voltage transient response
Secondary side control, no optocouplers,
fast transient load response
These are new high efficiency, open-frame, isolated 40A converters in an industry standard
dual quarter-brick footprint. These converters deliver high output current at low voltages,
and excellent useable power density for today’s high end applications. This series features
an input voltage range of 36 to 75VDC and output voltages of 1.2V/3.3V, 1.5V/3.3V,
1.8V/3.3V 2.5V/3.3V, and 5.0V/3.3V. The output voltage on each model is adjustable from
90% to 110% of the nominal value. Typical efficiencies are 90%. This series also has a
remote ON/OFF capability. Over-current and over-voltage protection features are included
as standard. Designed to meet international safety agency approvals, including EN60950-1
and UL/cUL60950, this series reduces compliance costs and time to market.
All specifications are typical at nominal input, full load at 25°C ambient unless otherwise stated
Patent No. 6,765,810
Other Patents Pending
2 YEAR WARRANTY
SPECIFICATIONS
OUTPUT SPECIFICATIONS
Voltage adjustability
Minimum load
Ripple and noise
Short circuit protection
Turn-on characteristics
INPUT SPECIFICATIONS
Input voltage range
Input current
48V nominal
No load
Remote OFF
36 to 75VDC
80mA max.
6mA max.
Open collector ref to -input
Open circuit or >2.4VDC
<0.4VDC
35.5V (typ.)
33.5V (typ.)
14ms (typ.)
14ms (typ.)
Both outputs
Both outputs
Both outputs
20MHz bandwidth
±10% min.
0%
50mV pk-pk max.
15mV rms max.
Both outputs
Monotonic
EMC CHARACTERISTICS
Immunity:
ESD air enclosure
Radiated field enclosure
Conducted
Input transients
EN61000-4-2 8kV/6kV (O/P within spec.)
EN61000-4-3 10V/m (O/P within spec.)
EN61000-4-6 10V
(O/P within spec.)
100V, 100ms
GENERAL SPECIFICATIONS
Efficiency
Basic insulation
Switching frequency
Approvals and
standards
Material flammability
Weight
MTBF
Input/output
Fixed
(See Notes 1 and 2)
See table
2250VDC
480kHz
EN60950-1 VDE
UL/cUL 60950
UL94V-0
34g (1.2oz)
Telcordia Tech SR-332 2,883,816 hours
Active high remote ON/OFF
Logic compatibility
ON
OFF
Undervoltage lockout
Start-up time
Power up
Power down
ENVIRONMENTAL SPECIFICATIONS
Thermal performance
Operating ambient.,
temperature
Non-operating
-40°C to +85°C
-55°C to +125°C
Power up
Remote ON/OFF
PROTECTION
Short-circuit
Over-voltage
Thermal
International Safety Standard Approvals
UL/cUL CAN/CSA 22.2 No. 60950-00 : UL 60950
File No. E135734
VDE Certificate No. 10401-3336-0197
File Name: quarter_brick_dual.pdf Rev: 04 Jan 2004
Continuous
Non-latching
125ºC hot spot temperature with
automatic recovery
Quarter-Brick Series
Dual output
DC/DC CONVERTERS
High Current, High Efficiency, Low Profile
NEW Product
2
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
OUTPUT VOLTAGE
NOMINAL
1
2
INITIAL SET POINT
1
2
(3)
OUTPUT
REGULATION BAND
1
2
CURRENT
1
2
OVP
TRIP POINT
1
2
EFFICIENCY
(TYP.)
MODEL NUMBER
QUARTER-BRICK DUAL OUTPUT PERFORMANCE MODELS
1.2V
1.5V
1.8V
2.5V
3.3V
3.3V
3.3V
3.3V
1.18 - 1.22V 3.25 - 3.35V 1.16 - 1.24V
1.48 - 1.55V 3.25 - 3.35V 1.44 - 1.55V
1.77 - 1.83V 3.25 - 3.35V 1.75 - 1.85V
2.46 - 2.54V 3.25 - 3.35V 2.42 - 2.58V
3.2V - 3.4V
3.2V - 3.4V
3.2V - 3.4V
3.2V - 3.4V
20A
20A
20A
20A
20A
20A
20A
20A
1.5V
1.8V
2.0V
3.0V
4.0V
4.0V
4.0V
4.0V
90.0%
90.5%
90.5%
90.5%
LQD40A48-3V3-1V2
LQD40A48-3V3-1V5
LQD40A48-3V3-1V8
LQD40A48-3V3-2V5
QUARTER-BRICK DUAL OUTPUT VALUE MODELS
1.2V
1.5V
1.8V
2.5V
3.3V
3.3V
3.3V
3.3V
3.3V
5.0V
1.18 - 1.22V 3.25 - 3.35V 1.16 - 1.24V 3.20V - 3.40V 15A
1.48 - 1.52V 3.25 - 3.35V 1.44 - 1.55V 3.20V - 3.40V 15A
1.77 - 1.83V 3.25 - 3.35V 1.75 - 1.85V 3.20V - 3.40V 15A
2.46 - 2.54V 3.25 - 3.35V 2.42 - 2.58V 3.20V - 3.40V 15A
3.25 - 3.35V 4.92 - 5.08V 3.20 - 3.40V 4.85V - 5.15V 15A
15A
15A
15A
15A
10A
1.5V
1.8V
2.0V
3.0V
4.0V
4.0V
4.0V
4.0V
4.0V
6.0V
90.0%
90.5%
90.5%
91.0%
91.0%
LQD30A48-3V3-1V2
LQD30A48-3V3-1V5
LQD30A48-3V3-1V8
LQD30A48-3V3-2V5
LQD25A48-5V0-3V3
Part Number System with Options
LQD40A48-3V3-1V8RA
Body Height, Package Type and Pin Length
A = 0.300” (7.62 mm), Through Hole,
0.188” (4.78 mm) Pins
E = 0.340” (8.64 mm), Through Hole,
0.188” (4.78 mm) Pins
L
= Low Profile
Q
= 1/4 Brick
Number of Outputs
D = Dual
Rated Output Current
(Sum of all outputs)
40A = 40 Amps
Nominal Rated Input Voltage
48 = 48 Volts (36 to 75V Range)
Output Voltage of V2
3V3 = 3.3 Volts
Remote ON/OFF Logic
No Suffix = Positive
Suffix ‘R’ = Negative
Output Voltage of V1
1V8 = 1.8 Volts
1V2 = 1.2 Volts
Notes
1
2
User must provide recommended fuses in order to comply with safety
approvals. See Application Note 137.
Maximum continuous output power.
90 Watts for LQD40A48-3V3-1V2 models
96 Watts for LQD40A48-3V3-1V5 models
102 Watts for LQD40A48-3V3-1V8 models
116 Watts for LQD40A48-3V3-2V5 models
67.5 Watts for LQD30A48-3V3-1V2 models
72 Watts for LQD30A48-3V3-1V5 models
76.5 Watts for LQD30A48-3V3-1V8 models
87 Watts for LQD30A48-3V3-2V5 models
99.5 Watts for LQD25A48-5V0-3V3 models
I
o1
= Imax, I
o2
= Imax.
3
File Name: quarter_brick_dual.pdf Rev: 04 Jan 2004
Quarter-Brick Series
Dual output
DC/DC CONVERTERS
High Current, High Efficiency, Low Profile
NEW Product
3
For the most current data and application support visit www.artesyn.com/powergroup/products.htm
2.30 (58.4)
0.145
±0.020
(3.68
±0.51)
2.000 (50.80)
ø0.040±0.002
(ø1.02
±0.05)
(7 pls)
0.250
(6.35)
7
6
5
4
0.250
(6.35)
0.125
(3.18)
HEIGHT
(See Option Table)
TOP VIEW
1.45
(36.8)
0.350
(8.89)
0.350
(8.89)
1
2
3
0.250
(6.35)
0.725
±0.020
(18.42
±0.51)
CLEARANCE
(See Option Table)
0.188 (4.78)
2.30 (58.4)
0.145
±0.020
(3.68
±0.51)
2.000 (50.80)
ø0.054±0.003
(ø1.37
±0.08)
(7 pls)
0.250
(6.35)
1.45
(36.8)
0.350
(8.89)
0.350
(8.89)
1
2
3
7
6
5
4
0.250
(6.35)
0.250
(6.35)
0.125
(3.18)
Dimensions in Inches (mm)
Tolerances (unless otherwise specified)
x.xx
±0.02
(x.x
±0.5)
x.xxx
±0.010
(x.xx
±0.25)
0.725
±0.020
(18.42
±0.51)
DIMENSION OPTIONS
OPTION
A
E
STAND OFF HEIGHT
0.030 (0.76) min.
0.070 (1.78) min.
BODY HEIGHT
0.300 (7.62) max.
0.340 (8.64) max.
PIN CONNECTIONS
PIN NUMBER
1
2
3
4
5
6
7
FUNCTION
+Vin
ON/OFF
-Vin
O/P 1
O/P RTN
Trim
O/P 2
Data Sheet © Artesyn Technologies® 2004
The information and specifications contained in this data sheet are believed to be correct at time of publication. However, Artesyn Technologies accepts no responsibility for consequences arising
from printing errors or inaccuracies. Specifications are subject to change without notice. No rights under any patent accompany the sale of any such product(s) or information contained herein.
Please consult our website for the following items:
✔
Application Note
✔
Longform Data Sheet
www.artesyn.com
File Name: quarter_brick_dual.pdf Rev: 04 Jan 2004
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