dc-dc converters 66 w non-isolated dc-dc converters 1 2 year warranty nxa66 series single output (non-isolated) ? transient response from 0 a to rated full load (up to 30 a/?), recovery within 250 s ? democratic current sharing, no need for master/slave configuration ? programmable output voltage ? remote enable pin ? power good signal ? true double ended differential remote sense ? available rohs compliant the nxa66 non-isolated dc-dc converter is targeted at computing applications that require point of load power conversion. the nxa66 is designed to meet the precise voltage and fast transient requirements of todays high performance applications such as workstations, file servers, desktop computers, telecommunications equipment, adapter cards, dsp and data processing. employing synchronous rectification and democratic current sharing, the nxa66 can be used in a stand-alone configuration, or paralleled as a building block to achieve higher output currents or redundancy. the current sharing specifications are met during static conditions, and transient conditions. the advanced democratic current sharing technique employed by the nxa66 removes the need for cumbersome master/slave combinations. the nxa66 uses gold plated edge tab fingers for a convenient, low impedance interconnect scheme. this also allows system designers to easily accommodate future expansion in their systems. all specifications ar e typical at nominal input, full load at 25 c unless otherwise stated general specifications efficiency 3v3 output 86% 2v5 output 82% switching frequency fixed 300 khz approvals and en60950 standards bi-national ul1950 csa c22.2 no. 234/950 weight 42.6 g (1.5 oz) mtbf bellcore 332 3,500,000 hours environment al specifica tions maximum temperatur e operating 5 ?c/10 min. shock temperature shock operating 10 ?c/hour non-operating 20 ?c/hour humidity operating 85% rh storage 95% rh altitude operating 10,000 feet max. storage 50,000 feet max. shock operational and 50 g 11ms non-operational half sine wave vibration operational and 0.02 g 2 /hz max. (see note 3) non-operational electrostatic discharge operating (see note 4) esd 15 kv non-operating esd 25 kv output specifications voltage adjustability vout programmable to 2v5 or 3v3 total error band 3v3 output 4.5% 2v5 output 4.5% ripple and noise (20 mhz bandwidth) 150 mv pk-pk max. transient response 50% to 75% and back 150 mv peak dev. settling time to 1.0%, no external cap. 400 ? short circuit protection continuous isc = 25 a rms automatic recovery input specifica tions input voltage range 12 v in nominal 10.8-13.2 vdc input current no load 100 ma typ. remote off 10 ma max. uvlo tur n on voltage 10.4 v max. uvlo tur n off voltage 8.2 v min. star t-up time nominal line 15 ms active high remote on/off logic compatibility ref. to -input on open circuit voltage 10.8 vdc min. off 0.8 vdc max. specifica tions file name: nxa66.pdf rev (02): 20 dec 2005
datasheet ?ar tesyn technologies ? 2005 the information and specifications contained in this datasheet are believed to be correct at time of publication. however, artesyn technologies accepts no responsibility for consequences arising from printing errors or inaccuracies. specifications are subject to change without notice. no rights under any patent accompany the sale of any such product(s) or information contained herein. for the most current data and application support visit www.artesyn.com/powergroup/products.htm nxa66 series single output (non-isolated) dc-dc converters 66 w non-isolated dc-dc converters 2 please consult our website for the following items: 4 longform datasheet www .ar tesyn.com pin connections pin no. row a row b pin no. 1 12 vin rtn 50 2 12 vin rtn 49 3 12 v in rtn 48 4 12 vin rtn 47 5 12 v in rtn 46 6 reser ved r tn 45 7 vsp 8 pwrgd reserved 43 9 outen ishar e 42 10 reserved reserved 41 11 vo-sense vo-sense rtn 40 12 vout return 39 13 vout return 38 14 v out rtn 37 15 vout rtn 36 16 vout rtn 35 17 v out r tn 34 18 v out rtn 33 19 vout rtn 32 20 vout rtn 31 21 vout rtn 30 22 vout rtn 29 23 vout rtn 28 24 vout rtn 27 25 vout rtn 26 input nominal output nominal output minimum model voltage voltage current efficiency number (5,6) 12 vdc 3.3/2.5 vdc 20 a 86/82% NXA66-12P3V3CY file name: nxa66.pdf rev (02): 20 dec 2005 n n o o t t e e s s c c o o n n d d . . 4 i nitilization level; esd event shall cause no out-of-regulation conditions. 5 the ?uffix indicates that these parts are tse rohs 5/6 (non pb-free) c ompliant. 6 n otice: some models do not support all options. please contact your local artesyn representative or use the on-line model number search tool at http://www.artesyn.com/powergroup/products.htm to find a suitable alternative. n n o o t t e e s s 1 i n this view, row b of the edge connector is visible. the leftmost pin is pin 50, and the rightmost pin is pin 26. row a of the connector is on the opposite side of the unit. pin 1 is behind pin 50, pin 25 is behind pin 26. s ee below for pinout. 2 r ecommended mating connector is amp 145432 or equivalent. pin 44 is absent and is used for electrical key. amp keying plug pn 65025-2 may be placed in the mating connector between pins 33 and 34, and between p ins 17 and 18. this keying plug serves as a mechanical key. 3 f r o m 5 hz to 20 hz, maintaining 0.02 g 2 / hz fr o m 20 hz to 500 hz, all axes. 2.750 (69.85) 1.065 (27.05) 1.375 (34.93) 1-25 26-50 50 34 33 25 1 8 17 1 26 26-50 1-25 0.125 (3.18) 0.400 (10.16) 0.700 (17.78) 2.586 (65.68) 0.875 (22.23) r0.080 (r2.03) (2 pls) on ckt board heatsink 0.588 (14.92) all dimensions in inches (mm) (see notes 1 and 2) ambient temperature ( c) o u t p u t c u r r e n t ( a ) 0 2 4 6 8 10 12 14 16 18 20 10 20 30 40 50 60 70 80 90 100 400 lfm 300 lfm 2 00 lfm 100 lfm zero air
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