NXA66 Series Single output (Non-Isolated) * Transient response from 0 A to rated full load (up to 30 A/s), 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 L O E 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 today's 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 Vout progra mma ble to 2V5 or 3V3 3 V 3 output 2 V 5 output 4. 5% 4. 5% E ffic ie nc y 3 V 3 output 2 V 5 output S witc hing fre que nc y F ix e d Ripple and noise (20 MHz bandwidth) 150 mV pk-pk max. A pprova ls a nd s ta nda rds Transient response peak dev. settling time 50% to 75% and back to 1.0%, no external cap. We ight S hort c irc uit prote c tion I s c = 2 5 A rm s 150 mV 400 s C ontinuous a utoma tic re c ove ry TIONS Input voltage range 12 V in nominal Input current No load Remote OFF UVLO tur n ON voltage UVLO tur n OFF voltage Star t-up time TIONS GENERAL SPECIFICATIONS Volta ge a djus ta bility INPUT SPECIFICA SPECIFICA C unless otherwise stated OUTPUT SPECIFICATIONS Tota l e rror ba nd 2 YEAR WARRANTY 10.8-13.2 Vdc 100 mA typ. 10 mA max. 10.4 V max. 8.2 V min. Nominal line Active high remote ON/OFF L ogic c ompa tibility ON O pe n c irc uit volta ge OFF 15 ms R e f. to - input 1 0 . 8 V dc min. 0 . 8 V d c ma x . 300 kH z E N 60950 B i- na tiona l U L 1 9 5 0 CSA C22.2 No. 234/950 4 2 . 6 g (1 . 5 oz ) MTBF ENVIRONMENT 86% 82% Bellcore 332 AL SPECIFICA Maximum temperatur e shock Temperature shock 3,500,000 hours TIONS Operating Operating Non-operating 5 C/10 min. 10 C/hour 20 C/hour Humidity Operating Storage 85% RH 95% RH Altitude Operating Storage 10,000 feet max. 50,000 feet max. Shock Operational and non-operational Vibration (See Note 3) Operational and non-operational Electrostatic discharge Operating (See Note 4) non-operating 50 G 11ms half sine wave 0.02 G 2 /Hz max. ESD 15 kV ESD 25 kV File Name: nxa66.pdf Rev (02): 20 Dec 2005 NXA66 Series Single output (Non-Isolated) INPUT VOLTAGE NOMINAL OUTPUT VOLTAGE 1 2 V dc 3 . 3 /2 . 5 V dc Notes 2 3 MINIMUM EFFICIENCY L O E 20 A MODEL NUMBER 8 6 /8 2 % (5,6) N XA66- 12P 3V 3C Y Notes C ond. In 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. 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 pins 17 and 18. This keying plug serves as a mechanical key. From 5 Hz to 20 Hz, maintaining 0.02 G 2/Hz fr om 20 Hz to 500 Hz, all axes. ROW B Initilization level; ESD event shall cause no out-of-regulation conditions. The `Y' suffix indicates that these parts are TSE RoHS 5/6 (non Pb-free) compliant. NOTICE: Some models do not support all options. Please contact your local Emerson representative or use the on-line model number search tool at http://www.Emerson.com/EmbeddedPower to find a suitable alternative. 6 20 PIN CONNECTIONS PIN NO. ROW A 4 5 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 9 OUTEN Ishar e 10 Reserved Reserved 41 11 Vo-sense Vo-sense rtn 40 12 Vout Return 39 13 Vout Return 38 18 400 Lfm 16 Output C urrent (A) 1 NOMINAL OUTPUT CURRENT 300 Lfm 14 12 200 Lfm 10 8 100 Lfm 6 4 Zero Air 2 0 43 10 20 30 40 50 60 70 80 90 100 Ambient Temperature ( C) 42 14 Vout RTN 37 15 Vout RTN 36 16 Vout RTN 35 17 Vout R TN 34 18 Vout 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 2.750 (69.85) 0.588 (14.92) HEATSINK 0.875 (22.23) R0.080 (R2.03) (2 PLS) ON CKT BOARD 1.065 (27.05) 1.375 (34.93) 0.700 (17.78) 1-25 26-50 26-50 50 1 34 33 17 18 1-25 26 25 2.586 (65.68) 0 . 1 2 5 (3 . 1 8 ) 0 . 4 0 0 (1 0 . 1 6 ) ALL DIMENSIONS IN INCHES (mm) (See Notes 1 and 2) Datasheet (c) Artesyn Technologies (R) 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. Please consult our website for the following items: Longform Datasheet www.PowerConversion.com File Name: nxa66.pdf Rev (02): 20 Dec 2005