may 08, 2003 revised to nov 20, 2006 page 1 of 3 www.power-one.com qd48 dual quarter brick family d c -dc converter data sheet the new qd48 family of dual output, 48 v input, dc-dc converters from power-one offers unprecedented per- formance in a quarter brick package by providing two in- dependently regulated high current outputs. this is ac- complished by the use of patent pending circuit and pack- aging techniques to achieve ultra-high efficiency, excellent thermal performance and a very low body profile. in telecommunications applications the qd48 converters provide up to 15 a per channel simultaneously - 30 a total - with thermal performance far exceeding existing dual quarter bricks and comparable to dual half bricks. unique to quarter bricks, the qd48 converters utilize inde- pendent power trains and control functions for each output, allowing very tight output voltage regulation and very low channel interference. in some applications they can be used to replace two single-output quarter bricks. low body profile and the preclusion of heat sinks minimize airflow shadowing, thus enhancing cooling for downstream devices. the use of 100% surface-mount technologies for assembly, coupled with power- one?s advanced electric and thermal circuitry and packaging, result in a product with ex- tremely high reliability. the qd48 family provides any combination of standard volt- ages from 5.0 v to 1.2 v in an industry standard seven-pin package. outputs can be trimmed from ?10% to +10% of the nominal output voltage, thus providing outstanding design flexibility. the qd48 family is designed to be a drop-in replacement for existing dual designs, and utilizes a common trim function for both outputs. the converters are also available in a surface mount package. inclusion of this new converter in new designs can result in a significant reliability improvement over other available duals because of its optimized thermal efficiency. applications ? telecommunications ? data communications ? wireless ? servers features ? rohs lead-free solder and lead-solder-exempted products are available ? two independently regulated outputs in any combina- tion of voltages from 1.2 v to 5.0 v ? simultaneously delivers 15 a per output from 1.2 v to 3.3 v; 10 a for 5 v output ? minimal cross-channel interference ? can replace two single-output quarter bricks ? high efficiency ? no heatsink required ? high reliability ? on-board differential input lc- filter ? start-up into pre-biased outputs ? no minimum load required on either output ? available in through-hole and sm packages ? industry-standard pinout ? industry-standard footprint: 1.45? x 2.30? ? low profile: 0.26? [6.6 mm] ? low weight: 1 oz [28 g] typical) ? meets basic insulation requirements of en60950 withstands 100 v input transient for 100 ms ? positive or negative logic on/off referenced to input ? fixed-frequency operation ? both outputs trimmed via common external trim resis- tor, range: +10%/-10% of v nom for both outputs ? ul 60950 recognized in us and canada and demko certified per iec/en 60950 ? meets fcc class b and iec/en 55022 class b con- ducted requirements with external filter qd48t converte r
may 08, 2003 revised to nov 20, 2006 page 2 of 3 www.power-one.com qd48 dual quarter brick family d c -dc converter data sheet physical information side view bottom view 2 6 3 1 7 5 4 qd48s pinout (surface mount) side view 1 2 7 top view 3 4 6 5 qd48t pinout (through-hole) pin connections pin # function 1 vin (+) 2 on/off 3 vin (-) 4 v out1 (+) 5 rtn [vo1(-) +vo2(-)] 6 trim 7 v out2 (+) height option [ht] (max. height) +0.000 [0.00] - 0.038 [-0.97] [cl] (min. clearance) +0.016 [+0.41] -0.000 [-0.00] a 0.303 [7.69] 0.030 [0.77] b 0.336 [8.53] 0.063 [1.60] c 0.500 [12.70] 0.227 [5.77] d 0.400 [10.16] 0.127 [3.23] pl pin length pin option 0.005 [0.13] a 0.188 [4.77] b 0.145 [3.68] c 0.110 [2.79] qd48t platform notes ? all dimensions are in inches [mm] ? all pins are 0.040?[1 .02] diameter with 0.078? [1.98] shoulder ? pin material: brass ? pin finish: tin/lead over nickel pin length: options shown on page 3 ? module weight: 1 oz [28 g] qd48s platform notes ? all dimensions are in inches [mm] ? connector material: copper ? connector finish: gold over nickel ? module weight: 1 oz [28 g] ? recommended surface mount pads: min. 0.080? x 0.112? max. 0.092?x 0.124?
may 08, 2003 revised to nov 20, 2006 page 3 of 3 www.power-one.com qd48 dual quarter brick family d c -dc converter data sheet converter part numbering scheme product series input voltage mounting scheme output voltage 1 (v out1 ) output voltage 2 (v out2 ) on/off logic maximum height [ht] pin length [pl] special features qd 48 t 025 033 - n b a 0 012 ? 1.2 v 015 ? 1.5 v 018 ? 1.8 v 020 ? 2.0 v 025 ? 2.5 v 033 ? 3.3 v 015 ? 1.5 v 018 ? 1.8 v 020 ? 2.0 v 025 ? 2.5 v 033 ? 3.3 v 050 ? 5.0 v dual quarter- brick format 36-75 v s ? surface mount t ? through- hole note: always specify v out2 as the higher of the two output voltages. n ? negative p ? positive smt s ? 0.273? through hole a ? 0.303? b ? 0.336? c ? 0.500? d ? 0.400? smt 0 ? 0.00? through hole a ? 0.188? b ? 0.145? c ? 0.110? 0 ? std the example above describes p/n qd48t025033-nba0: 36-75 v input, through-hole dual output, 2.5 v and 3.3 v outputs @ 15 a each, negative on/off logic, a maximum height of 0.336?, and a through the board pin length of 0.188?. please c onsult factory regarding availa bility of a specific version. rohs ordering information: ? no rohs suffix character is required for lead-solder-exemption compliance. ? for rohs compliance to all six s ubstances, add the letter "g" as the last letter of the part number. nuclear and medical applications - power-one products are not designed, intended for use in, or authorized for use as component s in life support systems, equipment used in hazardous environments, or nuclear c ontrol systems without the express written consent of the respec tive divisional president of power-one, inc. technical revisions - the appearance of products, including safe ty agency certifications pictured on labels, may change dependi ng on the date manufactured. specifications ar e subject to change without notice.
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