SQE48T20050 DC-DC Converter Data Sheet
36-75 VDC Input; 5.0 VDC @ 20 A Output
Features
• RoHS lead free solder and lead solder exempted
products are available
• Delivers up to 20 A
• Industry-standard quarter-brick pinout
• On-board input differential LC-filter
• Start-up into pre-biased load
• No minimum load required
• Weight: 0.72 oz [20.6 g]
• Meets Basic Insulation requirements of EN60950
• Withstands 100 V input transient for 100 ms
• Fixed-frequency operation
Applications
• Fully protected
• Telecommunications
• Data communications
• Wireless communications
• Servers
• Latching and non-latching protection available
• Positive or negative logic ON/OFF option
• Remote output sense
• Output voltage trim range: +10%/−20% with
industry-standard trim equations
Benefits
• High reliability: MTBF = 13.19 million hours,
calculated per Telcordia TR-332, Method I Case 1
• High efficiency – no heat sink required
• Higher current capability at elevated temperatures
• UL60950 recognized in US and Canada and
than most competitors' 20 A quarter-bricks
DEMKO certified per IEC/EN60950
• Extremely small footprint: 0.896” x 2.30” (2.06 in2),
38% smaller than conventional quarter-bricks
• Designed to meet Class B conducted emissions per
FCC and EN55022 when used with external filter
• All materials meet UL94, V-0 flammability rating
Description
The new high temperature SQE48-Series of 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 SQE48-Series of converters utilizes the
same pinout and functionality of the industry-standard quarter-bricks.
The SQE48-Series of converters provides thermal performance in high temperature environments that exceeds
most competitors' 20 A quarter-bricks. 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 airflow shadowing, thus enhancing cooling for
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.
The SQE48T20050 operates over an input voltage range of 36 to 75 VDC, and provides an output current up to
20 A with a standard output voltage of 5.0 VDC. The output can be trimmed from –20% to +10% of the nominal
output voltage, thus providing outstanding design flexibility.
With standard pinout and trim equations, the SQE48 converters are perfect drop-in replacements for the
competing quarter-brick designs. Inclusion of this converter in new designs can result in significant board space
and cost savings. The designer can expect reliability improvement over other available converters because of the
SQE48-Series’ optimized thermal efficiency.
JUL 07, 2006 revised to APR 12, 2007
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