QD48T025033 DC-DC Converter Data Sheet
36-75 VDC Input; 2.5 and 3.3VDC @ 15A Outputs
The QD48T025033 dual output through-hole mounted
DC-DC converter offers unprecedented performance in a
quarter-brick package by providing two independently
regulated high current outputs. This is accomplished by the
use of patent-pending circuit and packaging techniques to
achieve ultra-high efficiency, excellent thermal performance,
and a very low body profile.
In telecommunications applications the QD48 converters
provide up to 15 A per channel simultaneously – 30 A total –
with thermal performance far exceeding existing dual
quarter-bricks and comparable to dual half-bricks. Low body
profile and the preclusion of heat sinks minimize airflow
shadowing, thus enhancing cooling for downstream devices.
The use of 100% surface-mount technologies for assembly,
coupled with Power-One’s advanced electric and thermal
circuitry and packaging, results in a product with extremely
high quality and reliability.
QD48T025033 Converter
Features
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RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 15 A simultaneously on 2.5 VDC and
3.3 VDC outputs
Can replace two single output quarter-bricks
Minimal cross-channel interference
High efficiency: 87.5% @ 2x15 A, 88% @ 2x7.5 A
Start-up into pre-biased output
No minimum load required
No heat sink required
Low profile: 0.28” [7.2 mm]
Low weight: 1 oz [28 g] typical
Industry-standard footprint: 1.45” x 2.30”
Industry-standard pinout
Meets Basic Insulation requirements of EN60950
Withstands 100 V input transient for 100 ms
On-board LC input filter
100
90
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80
70
60
50
500 LFM (2.5 m/s)
400 LFM (2.0 m/s)
40
300 LFM (1.5 m/s)
200 LFM (1.0 m/s)
30
100 LFM (0.5 m/s)
30 LFM (0.15 m/s)
20
10
0
20
30
40
50
60
70
80
90
Ambient Temperature [°C]
Fixed-frequency operation
Fully protected
Fig. 1: Available output power vs. ambient air temperature and
airflow rates for QD48T025033 converter mounted vertically with air
flowing from pin 3 to pin 1, MOSFET temperature ≤ 120°C, Vin =
48 V and balanced load on both outputs (Iout1 = Iout2).
Output voltage trim range: ±10% for both outputs
Trim resistor via industry-standard equations
High reliability: MTBF 2.6 million hours, calculated per
Telcordia TR-332, Method I Case 1
Positive or negative logic ON/OFF option
UL 60950-1, CSA C22.2 60950-1-03, and certified per
IEC/EN 60950-1
Meets conducted emissions requirements of FCC
Class B and EN55022 Class B with external filter
All materials meet UL94, V-0 flammability rating
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Applications
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Telecommunications
Data communications
Wireless
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Servers
MCD10084 Rev. 1.0, 25-Sep-08
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