the hpq-12/25-d48 series offers high output current (up to 25 amps) in an industry standard quarter brick package requiring no heat sink for most applications. the hpq-12/25-d48 series de- livers ? xed 12 vdc output at 300 watts for printed circuit board mounting. wide range inputs on the 2.3 x 1.45 x 0.49 converter are 36 to 75 volts dc (48 volts nominal), ideal for datacom and telecom systems. the ? xed output voltage is regulated to within 0.25%. advanced automated surface mount assembly and planar magnetics deliver galvanic isolation rated at 2250 vdc for basic insulation. to power digital systems, the outputs offer fast settling to current steps and tolerance of higher capacitive loads. excellent ripple and noise speci? cations as- sure compatibility to cpus, asics, programmable logic and fpgas. no minimum load is required. for systems needing controlled startup/shutdown, an external remote on/off control may use either posi- tive or negative polarity. remote sense inputs com- pensate for resistive line drops at high currents. a wealth of self-protection features avoid prob- lems with both the converter and external circuits. these include input undervoltage lockout and overtemperature shutdown using an on-board tem- perature sensor. overcurrent protection using the hiccup autorestart technique provides inde? nite short-circuit protection. additional safety features include output overvoltage protection and reverse conduction elimination. the synchronous recti? er to- pology offers high ef? ciency for minimal heat buildup and no heat sink operation. the hpq-12/25-d48 series is certi? ed to full safety standards ul/en/iec/ csa 60950-1, 2nd edition and rfi/emi conducted/ radiated emission compliance to en55022, cispr22 with external ? lter. product overview embedded systems, datacom and telecom installations disk farms, data centers and cellular repeater sites remote sensor systems, dedicated controllers instrumentation systems, r&d platforms, auto- mated test ? xtures data concentrators, voice forwarding and speech processing systems applications features 12 volts dc ? xed output up to 25 amps industry standard quarter brick 2.3 x 1.45 x 0.49 open frame package wide range 36 to 75 vdc input voltages with 2250 volt basic isolation double lead-free assembly and attachment for rohs standards up to 300 watts total output power high ef? ciency (94.5%) synchronous recti? er topology stable no-load operation with no required external components operating temperature range -40 to +85 c. with no heat sink required certi? ed to ul/en 60950-1, csa-c22.2 no. 60950-1, 2nd edition safety approvals extensive self-protection, current limiting and shut down features x optional version omits trim and sense pins $ feature s f1 external dc power source reference and error ampli?er t 4 x j u d i j o h t ' j m u f s t t $ v s s f o u 4 f o t f -vout (4) +vout (8) 4 f o t f
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