The QM Series of high current single output dc-dc converters sets
new standards for thermal performance and power density in the
quarter-brick package.
The QM48T/S25050 converters of the QM Series provide thermal
performance in high temperature environments that is comparable to
or exceeds the industry’s leading 5 V half-bricks. This is
accomplished through the use of patent pending circuit, packaging
and processing techniques to achieve ultrahigh efficiency,
excellent thermal management, and a very 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 electric and thermal design,
results in a product with extremely high reliability.
Operating from a 36-75 V input, the QM Series converters provide
outputs that can be trimmed from –20% to +10% of the nominal output
voltage, thus providing outstanding design flexibility.
FEATURES
RoHS lead-free solder and lead-solder-exempted products are
available
Delivers up to 25 A @ 5.0 V
Industry-standard quarter brick pinout
On-board input differential LC-filter
High efficiency – no heat sink required
Start-up into pre-biased output
No minimum load required
Available in through-hole and surface-mount packages
Low profile: 0.28” [7.1 mm] SMT version,
0.31” [7.9 mm] TH version
Low weight: 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
High reliability: MTBF of 2.6 million hours,
calculated per Telcordia TR-332, Method I Case 1
Positive or negative logic ON/OFF option
UL60950 recognized in US and Canada and
Approved to the following Safety Standards: UL/CSA60950-1,
EN60950-1, and IEC60950-1
Meets conducted emissions requirements of FCC Class B and EN 55022
Class B with external filter
All materials meet UL94, V-0 flammability rating
