SQM48S20033-NS00【PDF 1/33 页】DC/DC EIGHTH BRICK

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SQM48T/S20 DC-DC Converter Data Sheet

36-75 VDC Input; 1.2-3.3 VDC @ 20A Outputs

Features

? RoHS lead-free solder and lead-solder-exempted

products are available

? Delivers up to 20 A

? Industry-standard, quarter-brick pinout

? Outputs available in 3.3, 2.5, 2.0,1.8, 1.5, and 1.2 V

? Available in through-hole and SM packages

? Low profile: 0.28” (7.1 mm)

? Low weight: 0.66 oz (18.5 g)

? Onboard input differential LC-filter for the low input

ripple current

? Start-up into pre-biased output

Applications

? No minimum load required

Telecommunications

Data communications

Wireless communications

Servers

? Meets Basic insulation requirements of EN60950

? Withstands 100 V input transient for 100 ms

? Fixed-frequency operation

? Fully protected

? Remote output sense

? Positive or negative logic ON/OFF option

Benefits

? High efficiency – no heat sink required

? Higher current capability at elevated temperatures

than most competitors' 20-25 A quarter-bricks

? Extremely small footprint: 0.896” x 2.30” (2.06 in 2 ),

38% smaller than conventional quarter-bricks

? Output voltage trim range: +10%/ ? 20% with

industry-standard trim equations

(except 1.2 V output)

? High reliability: MTBF = 3.4 million hours,

calculated per Telcordia TR-332, Method I Case 1

? UL60950 recognized in US and Canada and

DEMKO certified per IEC/EN60950

? 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 20A SemiQ? Family of DC-DC converters provide a high efficiency single output in a size that is only 60% of

industry-standard quarter bricks, while preserving the same pinout and functionality.

The 20A SQM48 Series converters of the SemiQ? Family provide thermal performance in high temperature

environments that exceeds most competitors' 20-25 A quarter-bricks. This is accomplished through the use of

patent pending circuit, packaging and processing techniques to achieve ultra-high efficiency, excellent thermal

management, and a very 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.

Operating from a 36-75 V input, the 20A SQM48 Series converters provide any standard output voltage from

3.3 V down to 1.2 V. Outputs can be trimmed from –20% to +10% of the nominal output voltage ( ± 10% for output

voltage 1.2 V), thus providing outstanding design flexibility.

With a standard pinout and trim equations, the SQM48 Series converters are perfect drop-in replacements for

existing 20 A quarter brick designs. Inclusion of this converter in new designs can result in significant board space

and cost savings. The device is also available in a surface mount package.

In both cases the designer can expect reliability improvement over other available converters because of the

SQM48 Series’ optimized thermal efficiency.

MCD10208 Rev. 1.0, 08-Jul-10

Page 1 of 33

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