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SQE48T40025 DC-DC Converter Data Sheet
36-75 VDC Input; 2.5 VDC @ 40A Output
Features
? RoHS lead-free solder and lead-solder-exempted
products are available
? Delivers up to 40A
? Industry-standard quarter-brick pinout
? On-board input differential LC-filter
? Start-up into pre-biased load
? No minimum load required
? Weight: 0.88 oz [25.1 g]
? Meets Basic Insulation requirements of EN60950
? Withstands 100 V input transient for 100 ms
? Fixed-frequency operation
? Industry-standard 1/8 brick footprint: 0.896” x
2.30” (2.06 in ), 38% smaller than conventional
Applications
? Telecommunications
? Data communications
? Wireless communications
? Servers, workstations
Benefits
? High efficiency – no heat sink required
? Higher current capability at elevated temperatures
than com petitors? 40A quarter-bricks
th
2
? Fully protected
? Remote output sense
? Positive or negative logic ON/OFF option
? Low height of 0.374” (9.5mm)
? Output voltage trim range: +10%/?20% with
industry-standard trim equations
? High reliability: MTBF = 15.4 million hours,
calculated per Telcordia SR-332, Method I Case 1
? UL60950 recognized in US and Canada and
DEMKO certified per IEC/EN60950 (pending)
? Designed to meet Class B conducted emissions per
FCC and EN55022 when used with external filter
? All materials meet UL94, V-0 flammability rating
quarter-bricks
Description
The high performance 40A SQE48T40025 eighth-brick DC-DC converter provides a high efficiency single output,
in a physical package that is only 62% the size of the industry-standard quarter-brick. Specifically designed for
operation in systems that have limited airflow and increased ambient temperatures, the SQE48T40025 converter
utilize the same pinout and functionality of the industry-standard quarter-bricks.
The SQE48T40025 converter provides thermal performance in high temperature environments that exceeds most
40A quarter-bricks in the market. This performance is accomplished through the use of patented/patent-pending
circuits, packaging, and processing techniques to achieve ultra-high efficiency, excellent thermal management,
and a low-body profile.
Low-body profile and the preclusion of heat sinks minimize impedance to system airflow, thus enhancing cooling
for both upstream and downstream devices. The use of 100% automation for assembly, coupled with advanced
electronic circuits and thermal design, results in a product with extremely high reliability.
Operating from a 36-75V input, the SQE48T40025 converter provides a 2.5V output voltage that can be trimmed
from – 20% to +10% of the nominal output voltage, thus providing outstanding design flexibility.
With standard pinout and trim equations, the SQE48T40025 converter is a perfect drop-in replacement for existing
40A quarter-brick designs. Inclusion of this converter in a new design can result in significant board space and
cost savings. The designer can expect reliability improvement over other available converters because of the
SQE48 T40025?s optimized thermal efficiency.
ZD-01723 Rev 1.2, 04-Jan-10
www.power-one.com
Page 1 of 13
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