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? bcd20006-g rev aa, 8-apr-09 page 1 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters 1 1 70imx4 models description the imx4 series of board-mountable, 4-watt dc-dc converters has been designed according to the latest industry requirements and standards. the converters are particularly suitable for use in mobile or stationary applications in transport, industry, or telecom, where variable input voltages or high transient voltages are prevalent. covering a total input voltage range from 8.4 vdc up to 121 vdc with three different models, the converters are available with single and dual outputs from 3.3 up to 24 vdc with flexible load distribution on dual outputs. features include efficient input and output filtering with unsurpassed transient and surge protection, low output ripple and noise, consistently high efficiency over the entire input voltage range, and high reliability as well as excellent dynamic response to load and line changes. the converters exhibit basic insulation and are designed and built according to the international safety standards iec/en 60950. 70imx4 models are also ce-marked. a special feature is their small case size, dil 24 with only 8.5 mm profile. the circuit is comprised of integrated planar magnetics, and all components are automatically assembled and solidly soldered onto a single pcb without any wire connection. thanks to the rigid mechanical design, the converters withstand an extremely high level of shock and vibrations. careful considerations of possible thermal stresses ensure the absence of hot spots providing long life in environments where temperature cycles are a reality. the thermal design allows operation at full load up to an ambient temperature of 85 c in free air without using any potting material. several options, such as open-frame or an alternative industrial pinout, provide a high level of application-specific engineering and design-in flexibility. 32 1.25" 20 0.8" 8.5 0.34 " description ............................................................................. 1 model selection ..................................................................... 2 functional description ........................................................... 3 electrical input data ............................................................... 4 electrical output data ............................................................ 6 electromagnetic compatibility (emc) .................................... 8 mechanical data .................................................................... 9 immunity to environmental conditions ................................ 10 safety and installation instructions ...................................... 10 description of options ......................................................... 11 ec declaration of conformity .............................................. 12 table of contents page page p r o du c t s e r v i c e p r odu c t i on m on i t o r e d t y p e t e s t e d features ? rohs lead-free-solder and lead-solder-exempted products are available. ? input voltage ranges up to 121 vdc ? 1 or 2 isolated outputs up to 48 v ? extremely wide input voltage ranges ? basic insulation ? immunity according to iec/en 61000-4-2, -3, -4, -5, -6 ? high efficiency (typ. 82%) ? flex power: flexible load distribution on outputs ? outputs no-load, overload, and short-circuit proof ? high reliability and no derating ? operating ambient temperature ? 40 to +85 c ? thermal protection ? industrial and alternative pinout ? dil 24 case with 8.5 mm profile
? bcd20006-g rev aa, 8-apr-09 page 2 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters model selection table 1: model selection output 1 output 2 output power input voltage efficiency model options 2 v o1 nom i o1 nom v o2 nom i o2 nom p o nom range ? ? typ [ vdc] [ma] 1 [ vdc] [ma] 1 [w ] [ vdc] [%] 3.3 900 - - 3.0 8.4 to 36 79 20imx4-03-8 z,g 3.3 900 - - 3.0 16.8 to 75 80 40imx4-03-8 z,g 5 700 - - 3.5 8.4 to 36 81 20imx4-05-8 k, z,g 5 700 - - 3.5 16.8 to 75 81 40imx4-05-8 k, z,g 5 700 - - 3.5 40 to 121 81 70imx4-05-8 g 12 340 - - 4.1 8.4 to 36 82 20imx4-12-8 z,g 12 340 - - 4.1 16.8 to 75 82 40imx4-12-8 z,g 12 340 - - 4.1 40 to 121 82 70imx4-12-8 g 15 280 - - 4.2 8.4 to 36 82 20imx4-15-8 z,g 15 280 - - 4.2 16.8 to 75 82 40imx4-15-8 z,g 15 280 - - 4.2 40 to 121 82 70imx4-15-8 g +5 350 ?5 350 3.5 8.4 to 36 81 20imx4-0505-8 k, z,g +5 350 ?5 350 3.5 16.8 to 75 81 40imx4-0505-8 k, z,g +5 350 ?5 350 3.5 40 to 121 81 70imx4-0505-8 g +12 170 ?12 170 4.1 8.4 to 36 82 20imx4-1212-8 k, z,g +12 170 ?12 170 4.1 16.8 to 75 82 40imx4-1212-8 z,g +15 140 ?15 140 4.2 8.4 to 36 82 20imx4-1515-8 k, z,g +15 140 ?15 140 4.2 16.8 to 75 82 40imx4-1515-8 k, z,g +24 80 ?24 80 3.8 8.4 to 36 83 20imx4-2424-8 z,g +24 80 ?24 80 3.8 16.8 to 75 83 40imx4-2424-8 z,g 1 flexible load distribution on double outputs possible. 2 for availibility and lead times ask power-one. part number description 20 imx4 - 05 05 -8 k z g input voltage range v i 8.4 to 36 vdc ............................................ 20 16.8 to 75 vdc .......................................... 40 40 to 121 vdc ........................................... 70 series ......................................................................... imx4 output voltage of output 1 ...................... 03, 05, 12, 15, 24 output voltage of output 2 ............................ 05, 12, 15, 24 operating ambient temperature range ?40 to 85 c ...... -8 options: alternative pinout ......................................... k open frame .................................................. z rohs compliant for all six substances ........ g 1 1 g is always placed at the end of the part number. example: 40imx4-0505-8kg: dc-dc converter, input voltage range 16.8 to 75 v, 2 outputs providing 5 v, 350 ma, temperature range ? 40 to 85 c, alternative pinout, rohs compliant for all six substances
? bcd20006-g rev aa, 8-apr-09 page 3 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters functional description the imx4 series converters are feedback-controlled flyback converters using current mode pwm (pulse width modulation). the input is protected against transients by means of a suppressor diode. the output voltage is monitored by a separate transformer winding close to the secondary windings and fed back to the control circuit. current limitation is provided by the primary circuit, thus limiting the total output current ( i o nom for single- and the sum i o1 nom + i o2 nom for dual-output models). the close magnetic coupling provided by the planar construction ensures very good regulation and allows for flexible load distribution on dual-output models. fig. 2 block diagram for dual-output models with standard pinout. pwm vi+ vi? vo+ vo? go 23 22 2 3 14 16 11 03045 pwm vi+ vi? vo+ vo? go 1 24 15 10 13 03047 11 fig. 4 block diagram for dual-output models with alternative pinout (option k). fig. 3 block diagram for single-output models with alternative pinout (option k). fig. 1 block diagram for single-output models with standard pinout. pwm vi+ vi? vo+ vo? 22 3 14 16 10 23 2 03044 pwm vi+ vi? vo+ vo? 1 24 13 12 2 03046 n.c.
? bcd20006-g rev aa, 8-apr-09 page 4 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters table 3: input electrolytic capacitors model 20imx4 40imx4 70imx4 c i 100 f 47 f 330 f 50 v 100 v 200 v electrical input data general conditions: t a = 25 c, unless t c is specified. table 2: input data input 20imx4 40imx4 70imx4 unit characteristics conditions min typ max min typ max min typ max v i input voltage range t c min to t c max 8.4 36 16.8 2 75 40 121 vdc v i nom nominal input voltage i o = 0 to i o nom 20 40 70 v i sur repetitive surge voltage abs. max input (3 s) 40 100 150 t start-up converter start-up time 1 worst case condition at 0.25 0.5 0.25 0.5 0.25 0.5 s v i min and full load t rise rise time 1 v i nom resistive load 5 5 5 ms i o nom capacitive load 12 12 12 i i o no-load input current i o = 0, v i min to v i max 15 20 5 10 5 10 ma c i input capacitance for surge calculation 0.54 0.3 0.15 f i inr p inrush peak current v i = v i nom 3 3.7 4.2 5.6 a f s switching frequency v i min to v i max , i o = 0 to i o nom approx. 400 approx. 400 approx. 400khz i i rr reflected ripple current i o = 0 to i o nom 100 60 30 ma pp v i rfi input rfi level en 55011/55022 4 aa a conducted 1 measured with a resistive or max. admissible capacitive load; see fig. 5. 2 operation at lower input voltage possible: p o approx. 80% of p o nom at v i min = 14.4 v 3 source impedance according to ets 300132-2, version 4.3. 4 external capacitors required according to table 3. fig. 5 converter start-up and rise time inrush current the inrush current has been kept as low as possible by choosing a very small input capacitance. a series resistor may be inserted in the input line to further limit this current. fig. 6 typ. inrush current at v i nom , p o nom versus time measured according to ets 300132-2, version 4.3 (40imx4). fig. 7 input capacitors v o nom v o t start up t rise t 04008a a 0 10 20 30 40 s 04034a 0 1 2 3 start-up filter to comply with en 55011/55022 electromagnetic emission requirements according to table electrical input data can be achieved by adding an external capacitor as close as possible to the input terminals (see fig. 7 and table 3). vi+ vi? c i 04035b +
? bcd20006-g rev aa, 8-apr-09 page 5 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters input transient voltage protection in many applications transient voltages on the converter input are always possible. these may be caused for example by short circuits between vi+ and vi?, where the network inductance may generate high energy pulses. in order to protect the converter, a large transient voltage suppressor is fitted to the input; see table below. table 4: built-in transient voltage suppressor model breakdown peak power peak pulse voltage at 1 ms current v br nom p p i pp 20imx4 40 v 600 w 10.3 a 40imx4 100 v 600 w 4.1 a 70imx4 150 v 600 w 2.9 a fig. 8 external circuitry to comply with iec/en 61000-4-5, level 2. vi+ vi? c i l i d + 04036b if transients generating currents above the peak pulse current i pp are possible, an external limiting network such as the circuit shown in figure 8 is recommended. it provides compliance with transients according to iec/en 61000-4-5, level 2. the comp- onents are specified in table 5. if 40imx4 models should withstand 150 v transients according to 19pfl1, the same external circuitry with similar components as shown in figure 8 can be used. fuse and reverse polarity protection a suppressor diode on the input also protects against reverse polarity input voltage. an external fast fuse is required to limit this reverse current: table 6: external input fuse model fuse type 20imx4 fast 1 a 40imx4 fast 0.5 a 70imx4 fast 0.315 a table 5: components for the circuitry fig. 8 model 20imx4 40imx4 70imx4 l i 330 h, 0.42 330 h, 0.42 330 h, 0.65 1 a 0.6 a 0.3 a c i 68 f, 50 v 68 f, 100 v 100 f, 200 v d on 1.5ke 39 a on 1.5ke 82 a ?
? bcd20006-g rev aa, 8-apr-09 page 6 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters electrical output data general conditions: t a = 25 c, unless t c is specified. table 7a: output data for single-output models output v o nom 3.3 v 5 v 12 v 15 v unit characteristics conditions min typ max min typ max min typ max min typ max v o output setting voltage v i nom, i o = 0.5 i o nom 3.27 3.33 4.96 5.04 11.90 12.10 14.88 15.12 vdc i o nom output current (nom.) v i min to v i max 900 700 340 280 ma i o l current limit 2 v i nom , t c = 25 c 1800 1400 680 560 v o v line regulation v i min to v i max , i o nom 1 1 1 1 % v load regulation v i nom 3.5 3 3 3 i o = (0.1 to 1) i o nom v o output voltage noise v i min to v i max 5 80 80 120 150 mv pp i o = i o nom 6 20 40 20 40 40 60 50 75 v o clp output overvoltage min. load 1% 130 130 130 130 % limitation c o ext admissible <680 <680 <150 <100 f capacitive load v o d dynamic voltage deviat. v i nom 250 250 250 250 mv t d load recovery time i o = (1 to 0.5) i o nom 1111m s regulat. vo temperature coefficient v i min to v i max 0.02 0.02 0.02 0.02 %/k v o / t c i o = (0.1 to 1) i o nom table 7b: output data for dual-output models output v o nom 5 v 12 v 7 15 v 7 24 v 7 unit characteristics conditions min typ max min typ max min typ max min typ max v o1 output setting voltage v i nom 4.96 5.04 11.90 12.10 14.88 15.12 23.81 24.19 vdc v o2 i o1 = i o2 = 0.5 i o nom 4.95 5.05 11.88 12.12 14.85 15.15 23.75 24.25 i o nom output current (nom.) 1 v i min to v i max 2 x 350 2 x 170 2 x 140 2 x 80 ma p o l power limit 2 3 v i nom , t c = 25 c 2 x 3.5 2 x 4.0 2 x 4.2 2 x 4.0 w v o v line regulation v i min to v i max , i o nom 1 1 1 1 % v load regulation 4 v i nom 3 3.5 3 3 i o = (0.1 to 1) i o nom v o1, 2 output voltage noise v i min to v i max 5 100 140 150 240 mv pp i o = i o nom 6 40 60 45 70 50 75 40 120 v o clp output overvoltage min. load 1% 130 130 130 130 % limitation c o ext admissible <680 <150 <100 <47 f capacitive load v o d dynamic voltage deviat. v i nom 250 600 750 750 mv t d load recovery time i o = (1 to 0.5) i o nom 1111m s regulat. vo temperature coefficient v i min to v i max 0.02 0.02 0.02 0.02 %/k v o / t c i o = (0.1 to 1) i o nom 1 each output capable of delivering full output power. 2 the current limit is primary side controlled. 3 sum of both outputs. 4 conditions for specified output. other output loaded with constant current i o = 0.5 i o nom . 5 bw = 20 mhz 6 measured with a probe according to en 61204. 7 not available for 70imx4 models.
? bcd20006-g rev aa, 8-apr-09 page 7 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters thermal considerations if a converter, mounted on a pcb, is located in free, quasi- stationary air (convection cooling) at the maximum ambient temperature t a max (see table temperature specifications) and is operated at nominal input voltage and output power, the case temperature t c measured at the measuring point of case temperature t c (see mechanical data ) will approach the indicated value t c max after the warm-up phase. however, the relationship between t a and t c depends heavily on the conditions of operation and integration into a system. the thermal conditions depend on input voltage, output current, airflow, temperature of surrounding components and surfaces and the properties of the printed circuit board. t a max is therefore only an indicative value, and under practical operating conditions, the ambient temperature t a may be higher or lower. caution: the case temperature t c measured at the measuring point of case temperature t c (see mechanical data ) may under no circumstances exceed the specified maximum. the installer must ensure that under all operating conditions t c remains within the limits stated in the table temperature specifications. short circuit behavior the current limitation shuts down the converter, when a short circuit is applied to the output. it acts self-protecting, and automatically recovers after removal of the overload condition. output overvoltage protection the outputs are protected against overvoltages by zener diodes. in the event of an overvoltage, the converter will shut- down and attempt to restart automatically. the main purpose of this feature is to protect against possible overvoltages, which could occur due to a failure in the feedback control circuit. the converters are not designed to withstand external overvoltages applied to the outputs. connection in series the outputs of single or dual-output models can be connected in series without any precautions, taking into consideration that the output voltage should remain below 60 v for selv operation. connection in parallel several converters with equal output voltage can be fig. 9 overload switch-off (hiccup mode). 70 100 v o [%] t [ms] 05041a 0.3 s overload short circuit condition switch-off 0 connected in parallel and will share their output current quite equally. however, this may cause start-up problems and is only recommended in applications, where one converter is able to deliver the full load current, e.g., in true redundant systems. typical performance curves 5.25 5.0 4.75 4.5 4.25 4.0 00.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 i o [a] v o [v] 05056a fig. 10 v o versus i o (typ) of single-output models (20/40imx4-05) fig. 11 v o versus i o (typ.) of dual-output models (15 v), with a 30 v load connected to vo+ and vo ?. fig. 12 cross load regulation of dual-output models. v o1 versus i o1 (typ) for various i o2 (40imx4-1515). 28.5 29 29.5 30 30.5 31 31.5 v o1 + v o2 [v] 20 40 60 80 100 120 140 i o [ma] 0 05057a 14 14.5 15 15.5 16 16.5 v o1 [v] 20 40 60 80 100 120 140 i o1 [ma] 0 i o2 = 140 ma i o2 = 14 ma 05058a
? bcd20006-g rev aa, 8-apr-09 page 8 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters fig. 14 efficiency versus input voltage and load. typical values (40imx4-1212). fig. 13 flexible load distribution on dual outputs (2 12 v) with load variation from 0 to 150% of p o1 nom on output 1. output 2 loaded with 25% of p o2 nom . v o1 , v o2 [v] i o1 i o1 nom 05059a 12.8 12.4 12 11.6 11.2 030 60 90 120 150 [%] v o2 v o1 40 50 60 70 80 90 [%] 05060a 25 50 75 100 p o1 p o nom [%] v i nom v i max v i min electromagnetic compatibility (emc) electromagnetic immunity table 8: immunity type tests phenomenon standard class coupling value waveform source test in per- level mode applied imped. procedure oper. form. 2 electrostatic iec/en 2 contact discharge 4000 v p 1/50 ns 330 10 positive and yes b discharge 61000-4-2 3 air discharge 8000 v p 10 negative to case discharges electromagnetic iec/en 3 3 antenna 10 v/m am 80% n.a. 80 ? 1000 mhz yes a field 61000-4-3 1 khz 3 antenna 10 v/m pm, 50% duty n.a. 900 mhz yes a cycle, 200 hz repetition frequ. electrical fast iec/en 4 direct +i/?i 4000 v p bursts of 5/50 ns 50 60 s positive yes b transients/burst 61000-4-4 5 khz repet. rate, 60 s negative 15 ms burst, coupling mode 300 ms period surges iec/en 2 4 +i/?i 1000 v p 1.2/50 s2 5 pos. and 5 neg. yes b 61000-4-5 surges rf conducted iec/en 3 +i/?i 3 vac am 80% 50 0.15 to 80 mhz yes a immunity 61000-4-6 (140 db v) 1 khz 150 1 i = input, o = output 2 performance criterion: a = normal operation, no deviation from specifications, b = temporary loss of function or deviation from specs. 3 corresponds to the railway standard en 50121-3-2:2000, table 9.1 4 external components required.
? bcd20006-g rev aa, 8-apr-09 page 9 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters 10 20 30 40 50 60 70 80 0.2 0.5 1 2 5 10 20 mhz dbv 20imx4-cond_p 20imx4-2424-8, peak vi+, conducted, 0.15 - 30 mhz, uster, 30-jun-06 ci = 100 f, vi = 20 v, ro = 660 ohm, lead length 10 cm. en 55011 a fig. 15a typical disturbance voltage (peak) at the pos. input according to en 55011/55022, measured at v i nom and i o nom . output leads 0.1 m, twisted. input capacitors see table 3. (20imx4-2424-8). electromagnetic emission conducted rfi noise at input according to en 55011/55022 mechanical data dimensions in mm. fig. 16 standard or alternative pinout (option k) weight: <10 g fig. 17 open frame (option z) weight: <10 g fig. 15b typical disturbance voltage (peak) at the pos. input according to en 55011/55022, measured at v i nom and i o nom . output leads 0.1 m, twisted. input capacitors see table 3. (40imx4-05-8z). fig. 15c typical disturbance voltage (peak) at the pos. input according to en 55011/55022, measured at v i nom and i o nom . output leads 0.1 m, twisted. input capacitors see table 3. (70imx4-15-8). 33 (1.3") 1 20 (0.79") 12 1 13 24 11 x 2.54 (0.1") s09042a 15.24 (0.6") 8.5 (0.33") 0.5 (0.02") 3 (0.12") measuring point of case temperature t c 31 (1.22") 1 20 (0.79") 12 13 24 11 x 2.54 (0.1") s90004a 8.5 (0.33") 0.5 (0.02") 3 (0.12") 15.24 (0.6") european projection 10 20 30 40 50 60 70 80 0.2 0.5 1 2 5 10 20 mhz dbv 40imx4-cond_p 40imx4-05-8z, peak vi+, conducted, 0.15 - 30 mhz, uster, 30-jun-06 ci = 47 f, vi = 40 v, ro = 8.2 ohm, lead length 10 cm. en 55011 a 0.2 0.5 1 2 5 10 20 mhz 10 20 30 40 50 60 70 80 dbv 70imx4-cond_p 70imx4-15-8, peak vi+, conducted, 0.15 - 30 mhz, uster, 1-sep-06 ci = 330 f, vi = 70 v, ro = 68 ohm, lead length 10 cm. en 55011 a european projection
? bcd20006-g rev aa, 8-apr-09 page 10 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters immunity to environmental conditions table 9: mechanical and climatic stress test method standard test conditions status ca damp heat iec/en 60068-2-78 t emperature: 40 2 c converter steady state mil-std-810d section 507.2 relative humidity: 93 +2/-3 % not duration: 56 days operating ea shock iec/en 60068-2-27 1 acceleration amplitude: 100 g n = 981 m/s 2 converter (half-sinusoidal) mil-std-810d section 516.3 bump duration: 6 ms operating number of bumps: 18 (3 each direction) eb bump iec/en 60068-2-29 acceleration amplitude: 40 g n = 392 m/s 2 converter (half-sinusoidal) mil-std-810d section 516.3 bump duration: 6 ms operating number of bumps: 6000 (1000 each direction) fc vibration iec/en 60068-2-6 acceleration amplitude: 0.35 mm (10 to 60 hz) converter (sinusoidal) 5 g n = 49 m/s 2 (60 to 2000 hz) operating frequency (1 oct/min): 10 to 2000 hz test duration: 7.5 h (2.5 h each axis) fh vibration, iec/en 60068-2-64 acceleration spectral density: 0.05 g n 2 /hz converter broad-band frequency band: 10 to 500 hz operating random acceleration magnitude: 4.9 g n rms (digital control) test duration: 3 h (1 h each axis) kb salt mist, cyclic iec/en 60068-2-52 concentration: 5% (30 c) converter (sodium chloride duration: 2 h per cycle not nacl solution) storage: 40 c, 93% rel. humidity operating cycles and storage duration: 3 days, 22 h per cycle 1 covers also en 50155/en 61373 category 1, class b, body mounted (= chassis of coach) failure rates table 10: temperature specifications, valid for air pressure of 800 to 1200 hpa (800 to 1200 mbar) temperature standard (-8) unit characteristics conditions min max t a ambient temperature operational 1 ?40 85 c t c case temperature ?40 105 t s storage temperature non operational ?55 105 1 see thermal considerations temperatures table 11: mtbf mtbf ground benign ground fixed ground mobile unit t c = 40 c t c = 40 c t c = 70 c t c = 50 c 40imx4-05-8 (mil-hdbk-217f) 890 000 440 000 247 000 362 000 h 40imx4-1212-8 (bellcore) 3 535 000 1 768 000 917 000 476 000 safety and installation instructions installation instruction installation of the dc-dc converters must strictly follow the national safety regulations in compliance with the enclosure, mounting, creepage, clearance, casualty, markings and segregation requirements of the end-use application. connection to the system shall be made via a printed circuit board see mechanical data . the converters should be connected to a secondary circuit. do not open the converter. ensure that a converter failure does not result in a hazardous condition. to prevent excessive current flowing through the input lines in case of a short-circuit, an external fuse specified in table 6 should be installed in the non-earthed input supply line.
? bcd20006-g rev aa, 8-apr-09 page 11 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters fig. 18 foot print standards and approvals the converters are approved according to ul 60950, can/csa c22.2-60950, iec 60950-1:2001, and en 60950 -1:2004 the converters have been evaluated for: ? building-in ? basic insulation input to output, based on their maximum 1 12 13 24 10013a bottom view nuclear and medical applications - power-one products are not designed, intended for use in, or authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written conse nt of the respective divisional president of power-one, inc. technical revisions - the appearance of products, including safety agency certifications pictured on labels, may change dependi ng on the date manufactured. specifications are subject to change without notice. table 12: pin allocation for standard and option z pin single-output models dual-output models 2v i ? v i ? 3v i ? v i ? 10 n.c. - 11 - vo? 14 vo+ vo+ 16 vo? go 22 vi+ vi+ 23 vi+ vi+ table 13: pin allocation for option k pin single-output models dual-output models 1v i + v i + 2 n.c. - 10 - go 11 - go 12 vo? - 13 vo+ vo? 15 - vo+ 24 vi? vi? input voltage ? pollution degree 2 environment ? connecting the input to a secondary circuit, which is subject to a maximum transient rating of 1500 v for 20imx4 and 40imx4, and 2000 v for 70imx4 models. a cb scheme is available. the converters are subject to manufacturing surveillance in accordance with the above mentioned standards and with iso 9001:2000. railway applications to comply with railway standards, all components are coated with a protective lacquer (except option z). protection degree the protection degree of the converters is ip 30, except open- frame models (option z). cleaning agents in order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the power supplies are not hermetical sealed. however, the open-frame models (option z) leave the factory unlacquered, and may be cleaned and lacquered by the customer, for instance together with the mother board. consult power-one for suitable cleaning agents. isolation the electric strength test is performed in the factory as routine test in accordance with en 50116 and iec/en 60950, and should not be repeated in the field. power-one will not honor any warranty claims resulting from electric-strength field tests. table 14: electric strength test voltages characteristic input to output unit 20/40imx4 70imx4 factory test >1 s 1.2 1.5 kvac equivalent dc test voltage 1.5 2.0 kvdc coupling capacitance ~1.1 ~1.1 nf insulation resist. (500 vdc) >100 >100 m description of options option k: alternative pinout this pinout is compatible with other converters on the market, for instance with the ips3 series. option z: open frame for applications, where the protection of the case is not necessary or in the case that the motherboard should be cleaned and lacquered with the converter fitted. option g: rohs-6 converters with a type designation ending with g are rohs- compatible for all six substances.
? bcd20006-g rev aa, 8-apr-09 page 12 of 12 www.power-one.com imx4 dc-dc series data sheet 4-watt dc-dc converters ec declaration of conformity we power-one ag ackerstrasse 56, ch-8610 uster declare under our sole responsibility that imx4 series dc-dc converters carrying the ce- mark are in conformity with the provisions of the low voltage directive (lvd) 2006/95/ec of the european communities. conformity with the directives is presumed by conformity with the following harmonised standards: ? en 61204:1995 (= iec 61204:1993, modified) low-voltage power supply devices, dc output - performance characteristics and safety requirements ? en 60950-1/a11:2004 and iec 60950-1:2001 safety of information technology equipment. the installation instructions given in the corresponding data sheet describe correct inst allation leading to the presumption of conformity of the end product with the lvd. all imx4 dc-dc converters are component s, intended exclusively for inclusion within other equipment by an industrial assembly operation or by professional installers. they must not be operated as standalone products. hence conformity with the electromagnetic compatibility directive 89/336/eec (emc directive) needs not to be declared. nevertheless, guidance is provided in the data sheets on how conformity of the end product with emc standards under the responsibility of the installer can be achieved, from which conformity with the emc directive can be presumed. uster, 11 june 2007 power-one ag rolf baldauf johann milavec vice-president engineering director projects and ip

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