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the NDS series of converters are low profile, single output, dc-dc converters intended for smt placement and reflow soldering. the product provides onboard conversion of standard telecom, datacom, and industrial input voltages to isolated low output voltages. proprietary patented manufacturing process ensures optimal quality with full process automation. these are high performance, cost effective converters with an extremely small pcb footprint. ? rohs-compliant for all six substances ? single board design ? basic insulation ? 1500 vdc i/o electric strength test voltage ? low profile smt design ? high current density ? low conducted and radiated emi ? excellent co-planarity (within 0.1 mm) ? output overcurrent protection ? full output power at 70 c and 1 m/s airflow ? operating temperature up to 100 c ? remote shutdown (primary referenced) ? output voltage trim adjust, positive or negative ? 8.5 mm height profile ? safety-approved to iec/en 60950-1 and ? approved to the following safety standards: ul/csa60950-1, ? en60950-1, and iec60950-1 ? distributed power architectures ? telecommunications equipment ? lan/wan applications ? data processing ? industrial applications
2 n ds series tech.support@psbel.com model input voltage vdc input current, max a output v oltage v output current a output ripple/noise, m v p - p typical efficiency % NDS03ze - m6g 36 - 75 0. 35 3.3 3.0 75 85 NDS02zg - m6g 36 - 75 0.35 5.0 2.0 90 87 stresses in excess of the absolute maximum ratings may cause performance deg rad ation, adversely affect long term reliability, and cause permanent d amage to the converter. all specifications apply over input voltage, output load, and temperature range, unless otherwise noted. parameter conditions / description min nom max units i nput voltage (v i ) continuous 36 75 vdc transient input voltage (v it ) transient, 100 ms 100 vdc operating case temperature (t c ) at 100% load - 40 100 oc storage temperature (t s ) - 55 120 c on/off control voltage (v rc ) referenced to - vi - 1. 0 5.5 v all specificati ons apply over specified input voltage, output load and temperature range, unless otherwise noted. parameter conditions / description min nom max units shock iec68 - 2 - 27 100 g n sinusoidal vibration iec68 - 2 - 6 10 g n weight 10 g water washing standard process yes n/a mtbf per bellcore tr - nwt - 000 332 (100% load @25 c, gb) 6 052 000 h all specifications apply over specified input voltage, output load and temperature range, unless otherwise noted conditions / description min nom max units parameter insulation safety rating vi = 36 C in s u lation capacitance (cps) 4 100 p f insulation resistance (rps) 10 m ? all specifications apply over specified input voltage, output load and temperature range, unless otherwise noted parameter conditions / description min nom max units operating input voltage range (vi) continuous 36 48 75 v input current when shutdown vi , remote control activated 3 6 ma turn - on input voltage 36 C
NDS series 3 asia - pacif ic +86 755 298 85888 europe, middle east +353 61 225 977 north america +1 408 785 5200 ? 2016 bel power solutions & protection bcd.00013 _a d 17 - oct - 2016 turn - off input voltage 36 C 75 vi ramping down, io max 30 32 34 v turn - on time to output regulation band 350 500 ms after remote control 1 5 ms rise time 1 5 ms input reflected ripple current vi, io max 5 0 ma pp input capacitance 1.4 f all specifications apply over specified input voltage, output load and temperature range, unless otherwise noted. parameter conditions / description min nom max units shutdown control converter off shutdown pin is pulled low - 1.0 1 .0 v converter on voltage source or open circuit 3.5 5.5 v sink current vi=vi nom 0.3 ma all specifications apply over input voltage, output load and temperature range, unless otherwise noted. parameter conditions / description min nom max units output voltage set point (vo) vi nom, io = 1.5 a, 25 c 3.26 3.3 3.34 v output current (io) vi min to vi max 0 3.0 a line regulation vi min to vi max, 50% io max 65 mv load regulation vi nom, io min to io max 65 mv dynamic regulation : 50 - 100% io.max load step peak deviation change 250 m v settling time to 1% error band 250 s output ripple and noise C 20 mhz bandwidth 1 (vr) vi min to vi max, io min to io max, 50 75 mvpp admissible load ca pacitance (co max) io max, vi nom 2 2 00 f output current limit threshold (iol) vo 0.90 vo nom 120 200 %iomax switching frequency (fs) vi nom, io max 400 khz temperature coefficient (tco) 0.02 %vo/c trim range (vt) io min to io min, vi min to vi max 3.0 3.6 vo 1 measured with a 1 f ceramic across the output pins
4 n ds series tech.support@psbel.com typical characteristic curves all specifications apply over input voltage, output load and temperature range, unless otherwise noted. parameter conditions / description min nom max units output voltage set point (vo) vi nom, io = 1.5 a, 25 c 4.94 5.0 5.06 v output current (io) vi min to vi max 0 2 .0 a line regulation vi min to vi max, 50% io max 65 mv load regulation vi nom, io min to io max 65 mv dynamic regulation : 50 - 100% io.max load step peak deviation change 3 50 m v settling time to 1% error band 25 0 s output ripple and noise C 20 mhz bandwidth 2 (vr) vi min to vi max, io min to io max, 75 125 mvpp admissible load capacitance (co max) io max, vi nom 2 200 f output current limit threshold (iol) vo 0.90 vo nom 120 200 %iomax switching f requency (fs) vi nom, io max 400 khz temperature coefficient (tco) 0.02 %vo/c trim range (vt) io min to io min, vi min to vi max 4.5 5.5 vo 2 measured with a 1 f ceramic across the output pins
NDS series 5 asia - pacif ic +86 755 298 85888 europe, middle east +353 61 225 977 north america +1 408 785 5200 ? 2016 bel power solutions & protection bcd.00013 _a d 17 - oct - 2016 typical characteristic curves this series of converte rs does not require any external components for proper operation. however, i f the distribution of the input voltage to the converter contains significant inductance, a capacitor across the input terminals may be required to stabili ze the input voltage. a m inimum of 1 f, quality electrolytic / ceramic capacitor is recommended for this purpose. for output decoupling it is recommend connecting a 1 f ceramic capacitor directly across the output pins of the converter. 8.1 the remote control pin f unctions as a normal soft shutdown. it is referenced to the C vi pin . with positive logic, when the remote control pin is pulled low, the output is turned off and the unit goes in to a very low input power mode. an open collector switch is recommended to con trol the voltage between the remote con trol pin and the C vi pin of the converter. the remote control pin is pulled up internally, so no external voltage source is required. the user should avoid connecting a resistor between the remo te control pin and the +vi pin. the user must take care to ensure that the pin reference for the control is connected close to the C vi pin. the control signal must not be referenced ahead of emi filtering, or remotely from the unit. if the remote control pin is not used, it can be left floating. 8.2 the converter is designed for natural or forced convection cooling. the output power of the converter is limited by the maximum case temperature (tc). to ensure reliable long term operation of the converters, and to comply with safety agency requirements, bel power solutions limits max. allowable case temperature (tc) to 100 c; see mech. drawing. 8.3 paralleling of two converters is not possible. 8.4 when the output is overloaded above the maximum output current rating, the voltage will start to reduce to maintain the output power to a safe level. in a condition of high overload or short - circuit, where the output voltage is pulled below approximately 30% of vo .nom, the unit will enter a hiccup mode of operation. under this con dition the unit will attempt to restart, approximately every 25 ms, until the overload has cleared.
6 n ds series tech.support@psbel.com note: when the output voltage is trimmed up, the output power from the converter must not exceed its maximum rating. this is determined by measuring the voltage on the output pins, and multiplying it by the output current. the derating curves below give an indication of the output power achievable with and without forced - air cooling. however in the final applica tion, in order to ensure the reliability of the unit, care must be taken to ensure the maximum case temperature is not exceeded under any conditions. 8.5 the trim feature allows the user for adjusting the output voltage by means of an external resistor. to increa se vo resistor should be connected between pins 12 and 14. to decrease vo a resistor should be connected between pins 12 and 13. to increase vo: to reduce vo: [ ? [ ? NDS03ze - m6g 7010 3161 7010 1500 NDS02zg - m6g 11260 4532 11240 1500 vonom) - (vo (dxvo)- (a xt r ? e vo) - (vonom c) - vo) x ((b xt r ? e
NDS series 7 asia - pacif ic +86 755 298 85888 europe, middle east +353 61 225 977 north america +1 408 785 5200 ? 2016 bel power solutions & protection bcd.00013 _a d 17 - oct - 2016 these converters are tested with 1500 vdc from input to output. the input - to - output resist ance is greater than 10 m . these converters are provided with basic insulation between input and output. nevertheless, if the syst em using the converter needs to receive safety agency approval, certain rules must be followed in the design of the system. i n part icular, all of the creepage and clearance requirements of the end - use safety requirements must be observed. in order to consider the output of the converter as selv (safety extra low voltage) or tnv - 1, according to iec/en 60950 - 1 and ul/csa 60950 - 1, one of the following requirements must be met in the system design: (i) fuse: the converter has no internal fuse. an external fuse must be provided to protect the sy stem from catastrophic failure. a fuse with a rating not greater than 2.0 a is recommended. th e user can select a lower ra ting fuse based upon the inrush transient and the maximum input current of the converter, which occurs at the minimum input voltage. both input traces and the chassis ground trace (if applicable) must be capable of conducting a current of 1.5 time s the value of the fuse without opening. the fus e must not be placed in the grounded input line, if any. (ii) if the voltage source feeding the converter is selv, tnv - 1, or tnv - 2, the output is cons idered selv and may be grounded or ungrounde d. (iii) the circuitry of the converter may generate transients, which exceed the input voltage. even if the input voltage is selv (<60 v), the components on the primary side of the converter may have to be considered as hazar dous. a safety interlock may be need ed to prevent the user from accessing the converter while operational. 11.1 the converters meet the requirements class a of iec/en 55022 (conducted noise on the input terminals) without any external components. the results for thi s solution are displayed below. to meet class b, it is necessary to fit a 5 f ceramic capacitor across the input terminals. 11.2 standard applied stress class level performance criterion 1 electrostatic discharge en 61000 - 4 - 2 2 kv to pins 1 b electromagnetic field en 61000 - 4 - 3 3 v/m 2 a electrical fas t transien t en 61000 - 4 - 4 2000 vp to input 3 b conducted disturbances en 61000 - 4 - 6 3 vac to input 2 b 1) a : normal operation, no deviation from specification. b: temporary deviation from specification is possible.
8 n ds series tech.support@psbel.com recommended reflow profile (measured at the leads of the converter) product pre - heat ramp pre - heat soaking ramp to reflow r eflow cooling from to rate from to time rate time above liquids pea k temp. time within 5 oc of peak temp time to peak rate oc oc oc/s oc oc s oc s oc s s oc/s m6 (sn - pb eutectic) 25 150 2 150 183 90 - 120 2 45 2205 10 180 3 m6 g (lead free) 25 180 2 180 217 90 - 1 20 2 45 2405 10 210 3 worst case reflow parameters following j - std - 020d (measured in the center, on top side of the converter) product pre - heat ramp pre - heat soaking ramp to reflow reflow cooling from to rate from to max. time rate max. t ime above liquids max. peak temp. max. time within 5 oc of peak temp max. time to peak rate oc oc oc/s oc oc s oc s oc s s oc/s m6 (sn - pb eutectic) 25 150 3 100 150 120 3 45 230 10 360 6 m6 g (lead free) 25 180 3 150 200 120 3 45 260 10 480 6 the following soldering instructions must be observed to prevent failure or signif icant degradation of the module performance. power bel sol utions will not honor any warranty claims arising from failure to observe these instructions. the lead - frame is constructed for a high temperature glass filled, ul94 v - 0 flame retardant , dually orthophthalate molding compound commonly used for packaging of electronics components. it has passed nasa out gassing tests, and is certified to mil - m - 14. the coefficient of thermal expansion is equivalent to fr4. the gull wing leads are formed to ensure optimal solder join strength and structure. fur thermore they fac ilitate visual inspection (manual or automatic). the leads are formed from a 97% cu alloy plated with ni and matte sn. this material is commonly used in the manufacture of integrated circuits. it has good corrosion resistance and exhibits the nobility inhe rent to all high copper alloys. unlike brasses, this material is essentially immune to stress corro sion cracking. it also exhibits excellent solderability. it is readily wetted by solders and performs well in standard solderabi lity tests. (dip of class ii or better). the product is manufactured with a patented process, which is fully automated, and in line. this ensures that there i vacuum pick and place equipment. the open board construction of the unit ensures th odd form placement equipment,
NDS series 9 asia - pacif ic +86 755 298 85888 europe, middle east +353 61 225 977 north america +1 408 785 5200 ? 2016 bel power solutions & protection bcd.00013 _a d 17 - oct - 2016 dimensions in mm [inches] dimensions in mm [inches]
10 n ds series tech.support@psbel.com pin designation function reference 1 shutdown shutdown control. pull low to turn unit off primary 2 - vi input voltage return primary 3 nc no connection primary 4 no pin no pin - 5 no pin no pin - 6 no pin no pin - 7 no pin no pin - 8 no pin no pin - 9 nc no connection secondary 10 nc no connection secondary 11 nc no connection secondary 12 trim output voltage adjust secondary 13 +vo positive output voltage secondary 14 - vo output voltage return secondary 15 nc no connection secondary 16 nc no connection secondary 17 no pin no pin - 18 no pin no pin - 19 no pin no pin - 20 no pin no pin - 21 no pin no pin - 22 nc no connection primary 23 +vi positive input voltage primary 24 nc no connection primary
NDS series 11 asia - pacif ic +86 755 298 85888 europe, middle east +353 61 225 977 north america +1 408 785 5200 ? 2016 bel power solutions & protection bcd.00013 _a d 17 - oct - 2016 dimensions in mm [ inches] nuclear and medical applications - products are not designed or intended for use as critical comp onents in life support systems, equipment used in hazardous environments, or nuclear control systems. technical revisions - the appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufacture d. specifications are su bject to change without notice.

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