QM48T50015 DC-DC Converter Data Sheet
36-75 VDC Input; 1.5 VDC @ 50A Output
The QmaXTM Series of high current single output DC/DC
converters from Power-One sets new standards for thermal
performance and power density in the quarter brick package.
The 50A QM48 converters of the QmaXTM Series provide
thermal performance in high temperature environments that
is comparable to or exceeds the industry’s leading 50A half
bricks. This is accomplished through the use of patent pend-
ing circuit, packaging and processing techniques to achieve
ultra-high efficiency, excellent thermal management and a
very low body profile.
QM48T50015 Converter
The QM48T50 converters have a power density more than
twice that of competitors’ 50A half bricks. Over 2 square
inches of board space can be saved for every slot in which a
50A half brick is replaced with a QM48T50 converter from
Power-One.
Features
•
RoHS lead-free solder and lead-solder-exempted
products are available
•
•
•
Delivers up to 50 A @ 1.5 V (75 W)
Industry-standard quarter brick pinout
Higher current capability at 70ºC than most com-
petitors’ 50 A half bricks
Low body profile and the preclusion of heat sinks minimize
impedance to system airflow, thus enhancing cooling for
downstream devices. The use of 100% automation for as-
sembly, coupled with Power-One’s advanced electric and
thermal design, results in a product with extremely high reli-
ability.
•
•
•
•
•
•
•
•
•
•
•
•
On-board input differential LC-filter
High efficiency – no heat sink required
Start up into pre-biased output
No minimum load required
Lowest profile in industry: 0.31” [7.9 mm]
Lowest weight in industry: 1.1 oz [31.5 g] typical
Meets Basic Insulation requirements of EN60950
Withstands 100 V input transient for 100 ms
Fixed frequency operation
Fully protected
Remote output sense
Output voltage trim range: +10%/−20% with Industry-
standard trim equations
Operating from a 36-75 V input, the QmaXTM Series con-
verters provide standard output voltage for 1.5 V. Output can
be trimmed from –20% to +10% of the nominal output volt-
age, thus providing outstanding design flexibility.
Applications
•
High reliability: MTBF of 2.6 million hours, calculated
per Telcordia TR-332, Method I Case 1
Positive or negative logic ON/OFF option
UL 60950 recognized in US and Canada and DEMKO
certified per IEC/EN 60950
•
•
•
•
Telecommunications
Data communications
Wireless
•
•
Servers
•
•
Meets conducted emissions requirements of FCC
Class B and EN 55022 Class B with external filter
All materials meet UL94, V-0 flammability rating
MAY 14, 2004 revised to NOV 13, 2006
Page 1 of 13
www.power-one.com