QME48T40 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-3.3 VDC @ 40A Output
Features
RoHS lead-free solder and lead-solder-exempted
products are available
Delivers up to 40 A
Outputs available: 3.3, 2.5, 1.8, 1.5, 1.2 and 1.0 V
Industry-standard quarter-brick pinout
On-board input differential LC-filter
Startup into pre-biased load
No minimum load required
Dimensions: 1.45” x 2.30” x 0.425”
(36.83 x 58.42 x 10.80 mm)
Weight: 1.2 oz [34.2 g]
Meets Basic Insulation requirements of EN60950
Withstands 100 V input transient for 100 ms
Fixed-frequency operation
Fully protected
Remote output sense
Non-Latching / Latching OTP option
Positive or negative logic ON/OFF option
Output voltage trim range: +10%/−20% with
Applications
Telecommunications
Data communications
Wireless communications
Servers, Workstations
industry-standard trim equations (±10% for 1.2 V
and 1.0 V)
Benefits
High reliability: MTBF = 13.9 million hours,
calculated per Telcordia TR-332, Method I Case 1
High efficiency – no heat sink required
Higher current capability at 70 ºC than most
competitors’ 40 A half-bricks
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
Description
The QME48T40 DC-DC Series of converters provide 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 QME48T40 converters provide any standard output voltage from 3.3 V down
to 1.0 V that can be trimmed from –20% to +10% of the nominal output voltage (±10% for output voltages 1.2 V
and 1.0 V), thus providing outstanding design flexibility.
ZD-02057 Rev. 4.2.1, 23-Feb-10
www.power-one.com
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