QM48T/S14120 DC-DC Converter Data Sheet
36-75 VDC Input; 12 VDC @ 14 A Output
Features
• RoHS lead free and lead-solder-exempted products
available
• Delivers up to 14 A (168 W)
• Industry-standard quarter-brick pinout
• Available: through-hole and surface-mount packages
• Weight: 1.1 oz [31.5 g] typical
• On-board input differential LC-filter
• Start-up into pre-biased load
• No minimum load required
• Meets Basic Insulation requirements of EN60950
• Withstands 100 V input transient for 100 ms
• Fixed-frequency operation
• Fully protected
• Remote output sense
• Fully protected with automatic recovery
• Paralleling option available
• Positive or negative logic ON/OFF option
• Output voltage trim range: +10%/−20% with
industry-standard trim equations
Applications
• Telecommunications
• Data communications
• Wireless communications
• Servers, workstations
• High reliability: MTBF approx. 2.6 million hours,
calculated per Telcordia TR-332, Method I Case 1
• UL60950 recognized in US and Canada and
Benefits
DEMKO certified per IEC/EN60950
• High efficiency – no heat sink required
• Higher current capability at 70 °C than many
competitors’ 12 V half-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 QM48T/S14120 converter of the QM-Series provides outstanding thermal performance in high temperature
environments. 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.
The 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 36-75 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.
The paralleling version of the QM48T/S14120-wxyP converter has the paralleling capability for use in applications
requiring higher power levels than available with a single converter.
MAY 31, 2006 revised to Sep 28, 2006
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