NXA66 Series Single output (Non-Isolated) DC/DC CONVERTERS 66W Non-isolated DC/DC Converters 1 • Transient response from 0A to rated full load (up to 30A/µs), recovery within 250µs • Democratic current sharing, no need for master/slave configuration • Programmable output voltage • Remote enable pin • Power good signal • True double ended differential remote sense 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. 2 YEAR WARRANTY SPECIFICATIONS All specifications are typical at nominal input, full load at 25°C unless otherwise stated OUTPUT SPECIFICATIONS Voltage adjustability GENERAL SPECIFICATIONS Vout programmable to 2V5 or 3V3 3V3 output 2V5 output Switching frequency Fixed Total error band 3V3 output 2V5 output Ripple and noise (20MHz bandwidth) 150mV pk-pk max. Approvals and standards Transient response peak dev. settling time 50% to 75% and back to 1.0%, no external cap. Weight Short circuit protection Isc = 25A rms 4.5% 4.5% Efficiency 150mV 400µs Continuous automatic recovery INPUT SPECIFICATIONS Input voltage range 12Vin nominal Input current No load Remote OFF UVLO turn ON voltage UVLO turn OFF voltage Start-up time Nominal line Active high remote ON/OFF Logic compatibility ON Open circuit voltage OFF MTBF 86% 82% 300kHz EN60950 Bi-national UL1950 CSA C22.2 No. 234/950 42.6g (1.5 oz) Bellcore 332 3,500,000 hours ENVIRONMENTAL SPECIFICATIONS Maximum temperature shock Operating 100mA typ. 10mA max. Temperature shock Operating Non-operating 10.4V max. 8.2V min. Humidity Operating Storage 85% RH 95% RH Altitude Operating Storage 10,000 feet max. 50,000 feet max. Shock Operational and non-operational 50G 11ms half sine wave Vibration (See Note 3) Operational and non-operational 0.02G2/Hz max. Electrostatic discharge Operating (See Note 4) non-operating 10.8 to 13.2VDC 15ms Ref. to -input 10.8VDC min. 0.8VDC max. 5˚C/10 min. 10˚C/hour 20˚C/hour ESD 15kV ESD 25kV File Name: NXA66.PDF Rev: 31 July 2001 NXA66 Series Single output (Non-Isolated) DC/DC CONVERTERS 66W Non-isolated DC/DC Converters 2 For the most current data and application support visit www.artesyn.com/powergroup/products.htm INPUT VOLTAGE NOMINAL OUTPUT VOLTAGE NOMINAL OUTPUT CURRENT MINIMUM EFFICIENCY MODEL NUMBER 12VDC 3.3/2.5V 20A 86/82% NXA66-12P3V3C Notes 2 3 4 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. See below for pinout. Recommended 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 5Hz to 20Hz, maintaining 0.02G2/Hz from 20Hz to 500Hz, all axes. Initilization level; ESD event shall cause no out-of-regulation conditions. Derating Curve 20 18 PIN CONNECTIONS PIN NO. ROW A ROW B PIN NO. 400 Lfm 16 Output Current (A) 1 300 Lfm 14 12 200 Lfm 10 8 6 1 12V in RTN 50 2 12V in RTN 49 4 3 12V in RTN 48 2 4 12V in RTN 47 0 5 12V in RTN 46 6 Reserved RTN 45 7 VSP 8 PWRGD Reserved 43 9 OUTEN Ishare 42 10 Reserved Reserved 41 11 Vo-sense Vo-sense rtn 40 12 Vout Return 39 13 Vout Return 38 14 Vout RTN 37 15 Vout RTN 36 16 Vout RTN 35 17 Vout RTN 34 100 Lfm Zero Air 10 20 30 40 50 60 70 80 90 100 Ambient Temperature (∞C) 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 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 26-50 26-50 50 1 34 33 17 18 1-25 26 25 2.586 (65.68) 0.125 (3.18) 0.400 (10.16) ALL DIMENSIONS IN INCHES (mm) (See Notes 1 and 2) Data Sheet © Artesyn Technologies® 2002 The information and specifications contained in this data sheet 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 Data Sheet www.artesyn.com File Name: NXA66.PDF Rev: 31 July 2001