NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters NXA66 SERIES Single output, selectable Transient response from 0A to rated full load (up to 30A/µs), recovery within 100µsec Democratic current sharing, no need for master/slave configuration Programmable output voltage Remote enable pin Power good signal True double ended differential remote sense True output overvoltage protection with on-board fuse Overcurrent foldback, short circuit protection Overtemperature protection Edge tab mount via gold plated fingers for low interconnect voltage drop Small size 1.375 x 2.75 x 0.588 inches High power density, small footprint The NXA66 non-isolated DC/DC converter is The NXA66 uses gold plated edge tab targeted at computing applications that fingers for a convenient, low impedance require point of load power conversion. The interconnect scheme. This also allows NXA66 is designed to meet the precise system designers to easily accommodate voltage and fast transient requirements of future expansion in their systems. The today’s high performance applications such NXA66 has been mechanically designed to as workstations, file servers, desktop be compatible with integral latch retention computers, telecommunications equipment, mechanisms for improved shock and adapter cards, DSP and data processing. vibration performance in the application. 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. Patents pending [ 5 YEAR WARRANTY ] The advanced democratic current sharing technique employed by the NXA66 removes the need for cumbersome master/slave combinations. Powered by 1ICminer.com Electronic-Library Service CopyRight 2003 DC/DC SXA10 Series | 10W NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters Absolute Maximum Ratings Characteristic Symbol Min Input voltage - continuous Vin (cont) Input voltage - peak/surge or standard/level Typ Max Units Notes and Conditions 0 13.5 Vdc Vin(+) - Vin(-) Vin (peak) 0 13.5 V Peaks of any duration Operating temperature Ta 0 +100 ˚C Ambient temperature. See derating curves on Page 7 Storage temperature Tstorage -40 +100 ˚C Airflow V air 200 Characteristic Symbol Min Typ Input voltage - operating Vin (oper) 10.8 12 Input current - no load lin Input current - Quiescent lin (off) 10 mAdc Inrush current (I T) linrush 0.5 A2s Max Units 10.4 Vdc LFM Either direction, along connector axis. See derating curves on Page 7 Max Units Notes and Conditions 13.2 Vdc Input Characteristics 2 100 mAdc Turn On/Off Characteristic Symbol Input voltage - turn on Vin (on) Input voltage - turn off Vin (off) Hysteresis Min Typ 8.2 Notes and Conditions Vdc 2.2 Vdc Turn on delay - enabled, then power applied Tdelay (power) 10 15 msec With the enable signal asserted, this is the time from when the input voltage reaches the minimum specified operating voltage until the output voltage is within the total regulation band Turn on delay - power applied, then enabled Tdelay (enable) 10 15 msec With input voltage greater than the turn-on voltage, this is the time from when the enable pin is de-asserted until the output voltage is within the total regulation band Output overshoot at turn on/off Vovershoot 0 1 % Applies when enable pin is toggled or when input voltage is applied Rise time Trise 10 msec From 10% to 90%; full resistive load, no external capacitance Powered by ICminer.com Electronic-Library Service CopyRight 2003 2 NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters Signal Electrical Interface Characteristic - Signal Name Symbol Min Typ Max Units Notes and Conditions V Output is internally pulled up by a 4.7kΩ resistor to Vo. A high indicates that the main output is within ±10% of nominal value. This signal transitions high within 20ms of the output voltage coming into power good spec. 13.2 V Iih = 0µA; open circuit voltage -25 µA Allowable leakage current from signal pin into the open collector driver 0.8 V Converter guaranteed off when OUTEN is less than Vil(max) Power good output: High level output voltage Voh Output enable - OUTEN: High level input voltage Vih High level input current Iih Low level input voltage ViI Low level input current IiI -1.2 mA Vil = 0.8V Low level input current Iil (max) -1.3 mA ViI = 0.0V; maximum source current with output enable pin shorted to ground Voltage select pin - VSP High level input voltage Vih 13.2 V Iih = 0µA; open circuit voltage, VSP = 1, Vo = 3.3V High level input current Iih -25 µA Allowable leakage current from signal pin into the open collector driver Low level input voltage ViI 0.8 V VSP = 0, Vo = 2.5V when VSP is less than ViI (max) Low level input current IiI -1.2 mA ViI = 0.8V Low level input current IiI (max) -1.1 mA ViI = 0.0V; maximum source current with VSP pin shorted to ground Max Units Notes and Conditions 500 mV True +Sense and -Sense differential amplifier Max Units Notes and Conditions Hours Bellcore TR-332 See Note 10.8 12 0 10.8 12 0 Common Control Characteristic Symbol Min Typ Remote sense compensation Reliability and Service Life Characteristic Symbol Min Mean time between failure calculated MTBF 3,500,000 Powered by ICminer.com Electronic-Library Service CopyRight 2003 3 www.artesyn.com Typ SXA10 Series | 10W DC/DC NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters Other Specifications Characteristic Symbol Switching frequency Fsw Min Typ Max 300 Weight Units Notes and Conditions kHz Fixed frequency 42.6 g Max Units Max. temperature shock (operating) 5 ˚C/10 min. Temperature shock (operating) 10 ˚C/hour Temperature shock (non-operating) 20 ˚C/hour Humidity (operating) 85 %RH Humidity (storage) 95 %RH Environmental Requirements Characteristic Symbol Min Typ Altitude (operating) 0 10,000 ft Altitude (storage) 0 50,000 ft Shock (operational) 50 Vibration (operational) 0.01 Vibration (non-operational) 0.01 Shock (non-operational) 50 Notes and Conditions G 11ms half sine wave 0.02 G2/Hz From 5Hz to 20Hz, maintaining 0.02G2/Hz from 20Hz to 500Hz, all axes 0.02 G2/Hz From 5Hz to 20Hz, maintaining 0.02G2/Hz from 20Hz to 500Hz, all axes G 11ms half sine wave Electrostatic discharge (operating) ESD 15 kV Initilization level; ESD event shall cause no out-of-regulation conditions Electrostatic discharge (non-operating) ESD 25 kV Initialization level Safety Agency Approvals Characteristic UL File Number Approval pending CSA File Number Approval pending VDE File Number Approval pending VDE License Number Approval pending Standards Compliance List Standard Category EN60950 Plus A1 and A2 (pending, designed to meet) UL1950 3rd edition (pending, designed to meet) Powered by ICminer.com Electronic-Library Service CopyRight 2003 4 NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters Material Ratings Characteristic - Signal Name Symbol Value Units Notes and Conditions Flammability rating UL94V-0 Material type FR4 PCB Model Numbers Model Number Input Voltage Nominal Output Voltage Nominal Output Current Minimum Efficiency Maximum Load Reg. NXA66-12P3V3C 12VDC 3.3/2.5V 20A 86/82% ±1.0% Characteristic Symbol Min Input current - operating 3.3V/2.5 Model Input Characteristics Typ Max Units Notes and Conditions Iin 6.8 Adc Vin = Vin (nom); Iout = Iout (max.); Vo = 3.3V (measured at converter) Input current - maximum Iin (max.) 9.5 Adc Vin = Vin (off) (min); Iout = Iout (max.); Vo = 3.3V (measured at converter) Reflected ripple current Iin (ripple) 100 mA pk-pk Iout - Iout (max.), measured with recommended external bypass capacitor Input capacitance - internal filter Cinput Input capacitance - external bypass Cbypass 0 100 Characteristic Symbol Min Total regulation band VSP = 1 VSP = 0 Vout Vout 3.15 2.39 Output current - continuous Iout 0.00 Output current - short circuit Output voltage - noise 25 µF Internal to converter No max. µF Recommended customer added capacitance. Low ESR type Typ Max Units Notes and Conditions 3.30 2.50 3.45 2.61 Vdc Vdc For all line, static/dynamic load and temperature until end of life. With 2 x 820µF SP Oscons across output 20.0 Adc Isc 2.0 Adc Vpard 30 mV pk-pk Measurement bandwidth: 20MHz. With 2 x 820µF SP Oscons across output 3.3V/2.5 Model Electrical Characteristics - O/P Powered by ICminer.com Electronic-Library Service CopyRight 2003 5 www.artesyn.com Continuous, unit auto recovers from short (average o/p current) SXA10 Series | 10W DC/DC NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters 3.3V/2.5 Model Electrical Characteristics - O/P Characteristic Symbol Dynamic regulation - peak Vdynamic Dynamic regulation recovery time Trecovery External load capacitance Cext Min Typ Max Units Notes and Conditions 100 mV pk Diout: No load to full load, di/dt = 1A/µsec. External output capacitor is 2 x 820µF SP Oscons 150 µsec 4000 µF Operation with more than the maximum value is possible, but please consult Artesyn before doing so Typ Max Units Notes and Conditions 115 120 % Output rising above these thresholds fires the on-board SCR and disables the PWM gate drive circuitry. The SCR blows the on-board fuse which protects the output from the input 26.0 Adc Hiccup type protection, impedance of short <90mΩ 10.0 % Single line current share, maximum current imbalance between units at Iomax Max Units Notes and Conditions % Iout = 0.25A; Vin = 12Vdc 100 3.3V/2.5 Model Protection and Control Features Characteristic Symbol Min Overvoltage crowbar voltage Vcrow Overcurrent protection inception current Ioc Current share Ishare 0.00 Characteristic Symbol Min Efficiency (light load) η 25.0 3.3V/2.5 Model Efficiency Typ Efficiency (full load) VSP = 1 η 86.0 % Vout = 3.3V: Iout = 100% Iout (max); Vin = 12VDC VSP = 0 η 82.0 % Vout = 2.5V: Iout = 100% Iout (max); Vin = 12VDC Powered by ICminer.com Electronic-Library Service CopyRight 2003 6 NXA66 Series | 66W DC/DC Note 1 Mechanical Drawing Pin Connections In this view, row A of the edge connector is visible. The leftmost pin is pin 1, and the rightmost pin is pin 25. Row B of the connector is on the opposite side of the unit. Pin 50 is behind pin 1, pin 26 is behind pin 25. See below for pinout. Note 2 Mating Connector 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. Derating Curve 20 18 400 Lfm Output Current (A) 16 300 Lfm 14 12 200 Lfm 10 8 100 Lfm 6 4 Zero Air 2 0 Pin No. Row A Row B Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 12V in 12V in 12V in 12V in 12V in Reserved VSP PWRGD OUTEN Reserved Vo-sense Vout Vout Vout Vout Vout Vout Vout Vout Vout Vout Vout Vout Vout Vout RTN RTN RTN RTN RTN RTN 50 49 48 47 46 45 Reserved Ishare Reserved Vo-sense rtn Return RTN RTN RTN RTN RTN RTN RTN RTN RTN RTN RTN RTN RTN 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 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 26-50 26-50 50 1 34 33 17 18 26 25 2.586 (65.68) 0.125 (3.18) 0.400 (10.16) ALL DIMENSIONS IN INCHES (mm) (See Notes 1 and 2) Figure 1 - Mechanical Drawing Powered by ICminer.com Electronic-Library Service CopyRight 2003 7 www.artesyn.com 1-25 NXA66 Series | 66W DC/DC 66 Watt non-isolated DC/DC converters NORTH AMERICA e-mail: [email protected] ☎ 800 769 7274 ☎+ 508 628 5600 EUROPEAN LOCATIONS e-mail: [email protected] IRELAND ☎+ 353 24 93130 AUSTRIA ☎+ 43 1 80150 FAR EAST LOCATIONS e-mail: [email protected] HONG KONG ☎+ 852 2699 2868 DS_NXA66_20000204.PDF Data Sheet Artesyn Technologies®, 2000 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. Powered by ICminer.com Electronic-Library Service CopyRight 2003 8 www.artesyn.com