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board mountable dc-dc converters imy 35 series edition 2/5.2000 1/15 35 watt dc-dc converters imy 35 series input to output electric strength test up to 2.5 kv dc input voltage: 60...150 v dc 2, 3 and 4 outputs configurable output voltages from 5 to 60 v dc extremely wide input voltage ranges electrical isolation, also between outputs emissions below en 55022, level b immunity to iec/en 61000-4-2,-3,-4,-5 and -6 programmable input undervoltage lock-out shut down input output voltages adjustable with flexible load distribu- tion frequency synchronisation outputs no-load, overload and short-circuit proof operating ambient temperature up to ?0...85 c thermal protection ?" 2,5" case with 10.5 mm profile or 8.9 mm open frame double or reinforced insulation summary the imy 35 series of board mountable 35 watt dc-dc con- verters has been designed according to the latest industry requirements and standards. the converters are particu- larly suitable for use in mobile or stationary applications in transport, railways, industry, or telecommunication where variable input voltages or high transient voltages are preva- lent. with a total input voltage range from 60...150 v, the units are available with double and quadruple outputs, electri- cally isolated, from 5 v up to 60 v externally adjustable and with flexible load distribution. a shut down input allows re- mote converter on-off. features include consistently high efficiency over the entire input voltage range, high reliability and excellent dynamic response to load and line changes. the converters are designed and built according to the in- ternational safety standards iec/en 60950, ul 1950, can/ csa c22.2 no.950-95. lga, ul and cul approvals are in progress. the circuit comprises of two planar magnetics devices and all components are automatically assembled and solidly soldered onto a single pcb without any wire connection. magnetic feedback ensures maximum reliability and repeatability in the control loop over all operating condi- tions. careful considerations of possible thermal stresses ensure the absence of hot spots providing long life in envi- ronments where temperature cycles are a reality. the ther- mal design without using any potting material allows opera- tion at full load up to an ambient temperature of 71 c in free air. for extremely high vibration environments the case has holes for screw mounting. various options as e.g. extended temperature range 40...85 c or an alternative pinout pro- vide a high level of application specific engineering and de- sign-in flexibility. safety according to iec/en 60950, ul 1950 approvals pending lga table of contents page summary .......................................................................... 1 type survey and key data .............................................. 2 type key .......................................................................... 2 functional description ..................................................... 3 electrical input data ......................................................... 4 electrical output data ...................................................... 6 page auxiliary functions ........................................................... 9 electromagnetic compatibility (emc) ............................ 10 immunity to environmental conditions .......................... 11 mechanical data ............................................................ 12 safety and installation instructions ................................ 13 description of option ..................................................... 15 76.2 3" 63.5 2.5" 10.5 0.41" 72.8 2.87" 47.8 1.88" 8.9 0.35"
board mountable dc-dc converters imy 35 series edition 2/5.2000 2/15 type survey and key data table 1: type survey output 1 output 2 output 3 output 4 input voltage eff. type trim opt. u o nom i o nom u o nom i o nom u o nom i o nom u o nom i o nom u i min ... u i max h typ designation [v dc] [a] [v dc] [a] [v dc] [a] [v dc] [a] [v dc] [%] 5 2.8 5 2.8 - - - - 60...150 84 110 imy 35-05-05-9 primary -8, z, i 12 1.4 12 1.4 - - - - 60...150 86 110 imy 35-12-12-9 primary -8, z, i 15 1.2 15 1.2 - - - - 60...150 86 110 imy 35-15-15-9 primary -8, z, i 5 1.4 5 1.4 5 1.4 5 1.4 60...150 87 110 imy 35 d05d05-9 primary -8, z, i 12 0.7 12 0.7 12 0.7 12 0.7 60...150 89 110 imy 35 d12d12-9 primary -8, z, i 15 0.6 15 0.6 15 0.6 15 0.6 60...150 89 110 imy 35 d15d15-9 primary -8, z, i trim the trim input on the primary side (trim, pin 5) influences all outputs. type key dual output units 110 imy 35 - 12 - 12 -9 i z input voltage range u i 60...150 v dc .......................................... 110 series ...................................................................... imy 35 output 1 of double types .................................... 05, 12, 15 output 2 of double types .................................... 05, 12, 15 operating ambient temperature range t a 40...71 c (standard) ................................. -9 40...85 c (option) ..................................... -8 options: inhibit ............................................................ i open frame .................................................. z quad output units 110 imy 35 d05 d05 -9 i z input voltage range u i 60...150 v dc .......................................... 110 series ...................................................................... imy 35 output 1 and 4 of quad types ..................... d05, d12, d15 output 2 and 3 of quad types ..................... d05, d12, d15 operating ambient temperature range t a 40...71 c (standard) ................................. -9 40...85 c (option) ..................................... -8 options: inhibit ............................................................ i open frame .................................................. z
board mountable dc-dc converters imy 35 series edition 2/5.2000 3/15 functional description the imy 35 family of dc-dc converters consists of two feedback controlled interleaved switching flyback power trains using current mode pwm (pulse width modulation). functionally the converters are of two main types. the dual output types consist of two electrically isolated outputs vo1, vo2. vo1 and vo2 derives from two power trains and are electrically isolated. voltage regulation for each output is achieved with passive transformer feedback from the main transformer of each power train. adjustment of the outputs voltages in the range of 80...105% of u o nom is possible via trim input on the primary side (see: block diagram, dual output types .) the quadruple output type consists of 4 outputs and two power trains. vo1, vo4 derive from the first power train and vo2, vo3 from the second one (thus each pair of outputs is independent from the other one). voltage regulation for each pair of outputs is achieved with passive transformer feedback from the main transformer of each power train. each pair of outputs are restricted to being of the same out- put voltage type (i.e. d05, d12, etc.). if both power trains have the same output voltage, all outputs may be adjusted by means of the trim input. (in case of different output volt- ages, the trim1 input influences only vo1 and vo4. see: block diagram, quadruple output types .) current limitation is provided by the primary circuit for each power train and limits the possible output power for each pair of outputs. in the case of an overload on either of the power trains which causes the output voltage to fall less than typically 60% of u o nom , the entire converter will shut down and automatically restart in short intervals. overtemperature protection is provided for each power train which will shut down the converter in excessive over- load conditions with automatic restart approximately in short intervals. pwm 4 8 1 vi+ pul sd 5 trim/n.c. 6 w 7 ref 2 vi 17 15 13 11 19 vo1+ vo1 vo2+ vo2 n.c. 03100 3 n.c. 16 n.c. 18 trim1/n.c. 12 n.c. 14 n.c. fig. 1 block diagram 1, double output types pwm 4 8 1 vi+ sd pul 5 trim 6 w 7 ref 2 vi 16 15 17 18 13 14 12 11 vo4 vo1+ vo1 vo4+ vo2+ vo2 vo3+ vo3 03098 3 n.c. 19 n.c. fig. 2 block diagram 3, quadruple output types
board mountable dc-dc converters imy 35 series edition 2/5.2000 4/15 electrical input data general conditions: t a = 25 c, unless t c is specified. shut down pin left open circuit (not connected). trim not connected. table 2: input data input 110 imy characteristics conditions min typ max unit u i input voltage range 1 t a min ... t a max 60 2 150 v dc u i nom nominal input voltage i o = 0... i o nom 110 u i sur repetitive surge voltage abs. max input (3 s) 168 t start up converter switch on worst case condition at 0.25 0.5 s start-up time 2 sd high u i min and full load 0.1 t rise rise time 3 u i nom resist load 5 ms i o nom capac. load 10 20 i i o no load input current i o = 0, u i min ... u i max 10 ma i irr reflected ripple current i o = 0... i o nom 20 i inr p inrush peak current 4 u i = u i nom 10 a c i input capacitance for surge calculation 0.35 f u sd shut down voltage unit shut down 10...0.7 v dc unit operating r sd shut down input resistance for current calculations approx. 10 k ? i sd input current if unit u i min ... u i max 1ma shut down f s switching frequency u i min ... u i max , i o = 0... i o nom approx. 220 khz u i rfi input rfi level, conducted en 55022 5 b 1 u i min will not be as stated if u o is increased above u o nom by use of trim input. if the output voltage is set to a higher value, u i min will be proportionately increased. 2 input undervoltage lock-out at typ. 90% of u i min . 3 measured with resistive and max. admissible capacitive load. 4 source impedance according to prets 300132-2, version 4.3. 5 measured with a lead length of 0.1 m, leads twisted.
board mountable dc-dc converters imy 35 series edition 2/5.2000 5/15 inrush current the inrush current has been kept as low as possible by choosing a very small input capacitance. a series resistor may be installed in the input line to further reduce this cur- rent. i [a] t [ s] 04022 0 10 20 30 40 50 60 70 80 90 100 4 3 2 1 fig. 3 typical inrush current at u i nom , p o nom versus time. source impedance according to prets 300132-2, version 4.3 at u i nom . fig. 4 converter start-up and rise time u o nom u o t start up t rise t 04008 input transient voltage protection a built-in suppressor diode provides effective protection against input transients which may be caused for example by short-circuits accross the input lines where the network inductance may cause high energy pulses. table 4: built-in transient voltage suppressor type breakdown peak power peak pulse voltage at 1 ms current v br nom [v] p p [w] i pp [a] 110 imy 35 167 600 0.5 for very high energy transients as for example to achieve iec/en 61000-4-5 or etr 283 (19 pfl1) compliance (as per table: electromagnetic immunity ) an external inductor and capacitor are required. the components should have simi- lar characteristics as listed in table: components for exter- nal circuitry for iec/en 61000-4-5, level 2 or etr 283 (19pfl1) compliance . table 5: components for external circuitry for iec/en 61000-4-5, level 2 or etr 283 (19pfl1) compliance. type inductor (l) capacitor (c) 110 imy 35 l = 560 h/0.84 a 2 x 100 f/200 v ocr = 0.38 ? vi+ vi c l + 04063 fig. 5 example for external circuitry to comply with iec/en 61000-4-5 or etr 283 (19pfl1). reverse polarity protection the built-in suppressor diode also provides for reverse po- larity protection at the input by conducting current in the re- verse direction. an external fuse is required to limit this cur- rent. table 3: recommended external fuses converter type fuse type 110 imy 35 f2.0a 22 23.8 11.5 04052 fig. 6 dimensions of inductor l for 110 imy 35 types (e.g. coil craft, pch-45 series).
board mountable dc-dc converters imy 35 series edition 2/5.2000 6/15 electrical output data general conditions: t a = 25 c, unless t c is specified shutdown pin left open circuit (not connected) r input not connected table 6: output data for double output power trains. output 2 5 v 2 12 v 2 15 v characteristics conditions min typ max min typ max min typ max unit u o1 output voltage u i nom 4.95 5.05 11.88 12.12 14.85 15.15 v dc u o2 i o = 0.5 i o nom 4.94 5.06 11.86 12.14 14.82 15.18 i o nom output current 2 1.4 2 0.70 2 0.60 a i ol current limit 1 3.7 2.0 1.6 d u o u line regulation u i min ... u i max , i o nom 1 1 1% d u o l load regulation u i nom 3 3 3 i o = (0.1...1) i o nom u o1/2 output voltage noise u i min ... u i max 2 80 120 150 mv pp i o = i o nom 3 40 60 70 u o l output overvoltage limit. 4 min. load 1% 115 130 115 130 115 130 % c o ext admissible capacitive load 4000 470 330 f u o d dynamic voltage deviat. u i nom 250 400 450 mv t d load recovery time i o nom ? 1 / 2 i o nom 111ms regulation a uo temperature coefficient u i min ... u i max 0.02 0.02 0.02 %/k d u o / d t c i o = 0... i o max 1 the current limit is primary side controlled. in the event of a sustained overload condition the thermal protection may cause t he unit to shutdown (restart on cool-down). 2 bw = 20 mhz 3 measured with a probe according to en 61204 4 the overvoltage protection is via a primary side second regulation loop, not tracking with trim control.
board mountable dc-dc converters imy 35 series edition 2/5.2000 7/15 thermal considerations if a converter, mounted on a pcb, is located in free, quasi- stationary air (convection cooling) at the indicated maxi- mum ambient temperature t a max (see table: temperature specifications ) and is operated at its nominal input voltage and output power, the case temperature t c measured at the measuring point of case temperature t c (see: mechani- cal 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 inte- gration into a system. the thermal conditions are influ- enced by input voltage, output current, airflow, temperature of surrounding components and the surfaces and proper- ties 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 than this value. caution: the case temperature t c measured at the: measuring point of case temperature t c (see: mechani- cal data ) may under no circumstances exceed the specified maximum value. the installer must ensure that under all operating conditions t c remains within the lim- its stated in the table: temperature specifications. short circuit behaviour the current limit characteristic shuts down the converter whenever a short circuit is applied to an output. it acts self- protecting and automatically recovers after removal of the overload condition (hiccup mode). overtemperature protection the converters individual power trains are protected against possible overheating by means of an internal tem- perature monitoring circuit. it shuts down the unit above the internal temperature limit and attempts to automatically re- start. this feature prevents from excessive internal tem- perature building up which could occur under heavy over- load conditions. connection in series the outputs of one or several single or double output power trains may be connected in series without any precautions. connection in parallel the outputs of one or several double output power trains (except 3.3 or 5.1 v types) with equal nominal output volt- age can be connected in parallel. approximate current sharing between 2 or several power trains is ensured by their load dependent output characteristic. fig. 7 u o versus i o (typ) of units with u o = 5.1 v. fig. 8 u o1/2 versus i o1/2 of double output power trains (i.e. 2 12 v). see: block diagram 1 5.5 5.0 4.5 4.0 3.5 3.0 0 1 2 3 4 5 i o [a] u o [v] 05019 7 8 9 10 11 12 13 u o [v] 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 i o total [a] 0 05020 output overvoltage protection the outputs of the converter are protected against overvolt- ages by a second control loop. in the event of an overvolt- age on one of the outputs the unit will shut down and attempt to restart in short intervals. 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 overvoltage protection is not designed to with- stand externally applied overvoltages. typical performance curves general conditions: t a = 25 o c, unless t c is specified. shut down pin left open circuit. trim input not connected.
board mountable dc-dc converters imy 35 series edition 2/5.2000 8/15 fig. 9 cross load regulation u o4 versus i o1 (typ) for various i o4 for vo1, vo4 on power train 1. see: block diagram dual out- put types. (imy 35 d12d12-9) fig. 10 flexible load distribution on power train 1 of imy 35 d12d12-9 (4 12 v) with load variation from 0...150% of p o1 nom on output 1 (vo1). output 2 (vo4) loaded with 50% of p o4 nom . fig. 11 efficiency versus input voltage and load. typical values imy 35 d12d12-9 fig. 12 efficiency versus input voltage and load. typical values imy 35 d12d12-9 fig. 13 overload switch off (hiccup mode), typical values. 11.0 11.5 12.0 12.5 13.0 13.5 u o4 [v] 0.06 0.20 0.30 0.40 0.50 0.60 0.70 i o1 [a] 0.10 05164 i o4 = 0.35 a i o4 = 0.035 a u o1 , u o2 [v] i o1 i o1 nom 05039 14 13 12 11 10 025 50 75 100 150 [%] u o2 u o1 125 60 70 80 90 h [%] 50 75 100 p o p o total 25 05152 [%] u i min u i nom 60 70 80 90 h [%] 50 75 100 p o p o total 25 05153 [%] u i min u i nom 70 100 u o [%] t [ms] 05041 8.5 60.5 60.5 overload short circuit condition switch-off
board mountable dc-dc converters imy 35 series edition 2/5.2000 9/15 auxiliary functions shut down function the outputs of the converters may be enabled or disabled by means of a logic signal (ttl, cmos, etc.) applied to the shut down pin. if the shut down function is not required then it should be left open-circuit. converter operating: 2.0...20 v converter shut down: 10...0.7 v programmable input undervoltage lockout pul a special feature of these units is the accurate undervoltage lockout protection which protects the units (and system) from large currents caused by operation at low voltages. this ensures easier start-up in distributed power systems. table 7: turn on and turn off voltage type trigger level hysteresis units 110 imy 35 40...42.5 1v see: electrical input data for a description of the turn on turn off voltage levels of the various types. the under voltage lockout levels may be programmed by use of an external resistor to trim up the preset levels as indicated in the table below. table 8: typical values for r ext and the respective lockout voltage for input voltage. r ext [k ? ] u min [v] 27 22 10 26 030 ? 15.5 adjustable output voltage as a standard feature, the imy 35 offer adjustable output voltages in the range 80...105% of u o nom by use of a con- trol input pin. the trim control is offered either on primary or secondary side of the converter depending on type. for the dual output types refer to the block diagram 1. the units imy 35-12-12 and imy 35-15-15 exhibit a trim input connected to pin 5. this input influences both outputs simultaneously. both power trains have passive trans- former feedback and the trim input (pin 5) is referenced to the primary side. fig. 16 shows the circuit topology. adjust- ment of the output voltage is possible by means of either an external resistor r ext in the range of 100...105% of u o nom or an external voltage source in the range of 80...105% of u o nom . trim vo1+ vo2 + u ext vi+ vi r ext vo1 vo2+ 06137 control circuit u ref = 2.5 v 4 5 2 17 15 13 11 fig. 14 output voltage control for double output units by means of the trim input on the primary side. a) adjustment by means of an external resistor r ext : adjustment of the output voltage by means of an external resistor r ext is possible within the range of 100...105% of u o nom . r ext should be connected between the trim pin 5 and vi . connection of r ext to vi+ may damage the con- verter. the following table indicates suitable resistor val- ues for typical output voltages under nominal conditions ( u i nom , i o = 0.5 i o nom ). b) adjustment by means of an external voltage source u ext . for external output voltage adjustment in the range 80...105% of u o nom a (0...20 v) source u ext is required, connected to the trim pin 5 and vi . the table below indi- cates typical u o versus u ext values. applying a control voltage 15...20 v will set the converter into a hiccup mode. direct paralleling of the trim pins of units of the same type connected in parallel is feasible. table 10: u o versus u ext for u o = 80...105% u o nom ; typical values (u i nom , i o = 0.5 i o nom ) u o [% u o nom ] u ext [v] 105 0 102 1.8 100 2.5 95 4.25 85 8.25 80 10.2 table 9: r ext1 for u o > u o nom ; approximate values (u i nom , i o = 0.5 i o nom ) u o [% u o nom ] r ext [k ? ] 105...108 (107 typically) 0 105 3.3 104 6.2 103 10 102 18 101 39 100 the quadruple output units are shown in block diagram 3. all types with equal output voltage have the trim function connected to pin 5 referenced to the primary side which in- fluences all outputs simultaneously. the schematics are shown in fig. 16, the values of the adjust resistor r ext in ta- ble 10 and the external voltage source in table 11. synchronisation (w) this logic input can be used to synchronise the oscillator to an external frequency source. this pin is edge triggered with ttl thresholds, and requires a source frequency of 480...540 khz (duty cycle 10...90%). the external source frequency is internally divided by 2 to define the switching frequency for the converter. if unused, this pin can be con- nected to v1 (pin 2) or left open-circuit. reference (ref) this option provides a stable 5 v ( 0.2 v) reference signal on pin ref. it is protected by a 1.33 k ? resistor. this may be used also in conjunction with the trim input pin 5 (primary side) as a limited external voltage reference. we recom- mend to connect a filter capacitor (0.1 f) between ref and vi , if v ref is used.
board mountable dc-dc converters imy 35 series edition 2/5.2000 10/15 electromagnetic immunity table 11: immunity type tests phenomenon standard 1 class coupling value waveform source test in per- 3 level mode 2 applied imped. procedure oper. form. electrostatic iec/en 2 contact discharge 4000 v p 1/50 ns 330 ? 10 positive and yes b discharge 61000-4-2 (r pin open) 10 negative to case 3 air discharge 8000 v p discharges (r pin open) electromagnetic iec/en 3 antenna 10 v/m am 80% 26 1000 mhz yes a field 61000-4-3 1 khz env 50204 pm, 50% duty 900 mhz cycle, 200 hz resp. frequ. electrical fast iec/en 4 direct +i/ i 4000 v p bursts of 5/50 ns 50 ? 1 min positive yes b transient/burst 61000-4-4 5 khz rep. rate 1 min negative transients with transients per 15 ms burst coupling mode duration and a 300 ms period surge iec/en 3 +i/ i 2000 v p 1.2/50 s2 ? 5 pos. and 5 neg. yes b 61000-4-5 4 impulses per coupling mode conducted iec/en 3 +i/ i 10 v rms am modulated 50 ? 0.15...80 mhz yes a disturbancies 61000-4-6 (140 db v) 80%, 1 khz 150 ? transient etr 283 +i/ i 150 v p 0.1/0.3 ms limited to 3 positive yes b (19 pfl 1) <100 a 1 related and previous standards are referenced in: technical information: standards . 2 i = input, o = output. 3 a = normal operation, no deviation from specification, b = temporary deviation from specs. possibe. 4 external components required. which typically occur in many installations, but especially in battery driven mobile applications. electromagnetic compatibility (emc) a suppressor diode together with an input filter form an ef- fective protection against high input transient voltages fig. 15 typical disturbance voltage (quasi-peak) at the input ac- cording to cispr 11/en 55011 and cispr 22/en 55022, measured at u i nom and i o nom . output leads 0.1 m, twisted. (imy 35-d12d12-9) electromagnetic emission 07020 en 55022 a en 55022 b 90 80 70 60 50 40 30 20 10 0 0 .01 0 .05 0.1 0.5 1 2 5 10 20 30 [db v] mhz 0 .02
board mountable dc-dc converters imy 35 series edition 2/5.2000 11/15 table 15: mechanical stress test method standard test conditions status ca damp heat iec/din iec 60068-2-3 temperature: 40 2 c unit not steady state mil-std-810d section 507.2 relative humidity: 93 +2/-3 % operating duration: 56 days ea shock iec/en/din en 60068-2-27 acceleration amplitude: 100 g n = 981 m/s 2 unit (half-sinusoidal) mil-std-810d section 516.3 bump duration: 6 ms operating number of bumps: 18 (3 each direction) eb bump iec/en/din en 60068-2-29 acceleration amplitude: 40 g n = 392 m/s 2 unit (half-sinusoidal) mil-std-810d section 516.3 bump duration: 6 ms operating number of bumps: 6000 (1000 each direction) fc vibration iec/en/din en 60068-2-6 acceleration amplitude: 0.35 mm (10...60 hz) unit (sinusoidal) mil-std-810d section 514.3 5 g n = 49 m/s 2 (60...2000 hz) operating frequency (1 oct/min): 10...2000 hz test duration: 7.5 h (2.5 h each axis) fda random vibration iec 60068-2-35 acceleration spectral density: 0.05 g n 2 /hz unit wide band frequency band: 20...500 hz operating reproducibility acceleration magnitude: 4.9 g n rms high test duration: 3 h (1 h each axis) kb salt mist, cyclic iec/en/din iec 60068-2-52 concentration: 5% (30 c) unit not (sodium chloride duration: 2 h per cycle operating nacl solution) storage: 40 c, 93% rel. humidity storage duration: 22 h per cycle number of cycles: 3 cispr 22/en 55022, level b radiated electromagnetic emission requirements according to en 55022, class b (radiated emmission) can be achieved by adding an external common mode choke, see: input data . the filter components should be placed as close as possible to the input of the converter. vi+ vi l v+ v module 07114 fig. 16 example for external circuitry to comply with cispr22/en 55022, level b, radiated table 12: input filter components for en 55022, level b, radiated. type current compensated choke 110 imy 35 murata part no.:plh10a1112r6p02 table 13: temperature specifications, valid for air pressure of 800...1200 hpa (800...1200 mbar) temperature -9 option -8 3 characteristics conditions min max min max unit t a ambient temperature 1 operational 2 40 71 40 85 c t c case temperature 40 95 40 105 t s storage temperature 1 non operational 55 100 55 105 1 mil-std-810d section 501.2 and 502.2 2 see: thermal considerations 3 start up at 55 c table 14: mtbf and device hours mtbf ground benign ground fixed ground mobile mtbf acc. to mil-hdbk-217f t c = 40 c t c = 40 c t c = 70 c t c = 50 c 110 imy 35 h h h h immunity to environmental conditions
board mountable dc-dc converters imy 35 series edition 2/5.2000 12/15 mechanical data dimensions in mm. tolerances 0.3 mm unless otherwise indicated. fig. 17 case imy 35 (standard) weight: 67 g european projection 63.5 76.2 63.5 0.8 x 0.8 5.08 5 10.5 09121 69.6 56.9 thread m3 5.08 47.8 63.5 72.8 6.4 8.9 0.8 x 0.8 09123 fig. 18 case imy 35 open frame (option z) weight: 43 g
board mountable dc-dc converters imy 35 series edition 2/5.2000 13/15 safety and installation instructions installation instructions installation of the dc-dc converters must strictly follow the national safety regulations in compliance with the enclo- sure, 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 with hole diameters of 1.5 mm for the pins. the units should be connected to a secondary circuit. check for hazardous voltages before altering any connec- tions. do not open the module. ensure that a unit failure (e.g. by an internal short-circuit) does not result in a hazardous condition. see also: safety of operator accessible output circuit. input fuse to prevent excessive current flowing through the input sup- ply line in case of a short-circuit across the converter input an external fuse should be installed in a non earthed input supply line. we recommend a fast acting fuse f2.0a. standards and approvals all dc-dc converters are pending to be ul recognized ac- cording to ul 1950, ul recognized for canada to can/ csa c22.2 no. 950-95 and lga approved to iec/en 60950 standards. the units have been evaluated for: building in reinforced insulation input to output, based on their maximum input voltage the use in a pollution degree 2 environment connecting the input to a secondary circuit which is sub- ject to a maximum transient rating of 2500 v after approvals the dc-dc converters are subject to manu- facturing surveillance in accordance with the above men- tioned ul, csa, en and with iso 9001 standards. isolation the electric strength test is performed as factory test in ac- cordance with iec/en 60950 and ul 1950 and should not be repeated in the field. power-one will not honour any guarantee claims resulting from electric strength field tests. table 16: electric strength test voltages characteristic input to output output to unit imy 35 output electric strength 3.0 0.1 kv rms test voltage 1 s 2.5 0.5 kv dc insulation resistance >100 - m ? at 500 v dc partial discharge consult factory - kv extinction voltage table 17: pin allocation pin no. double quadruple output output 1 pul pul 2vi vi 3 n.c. n.c. 4vi+ vi+ 5 trim or n.c. trim 6w w 7 ref ref 8 sd or i sd or i 11 vo2 vo3 12 n.c. vo3+ 13 vo2+ vo2+ 14 n.c. vo2 15 vo1 vo1 16 n.c. vo1+ 17 vo1+ vo4+ 18 trim1 or n.c. vo4 19 n.c. n.c. fig. 19 pin allocation protection degree the protection degree of the dc-dc converters is ip 30 (not for option z). cleaning agents in order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the power sup- plies are not hermetically sealed. 09122 1 2 3 4 5 6 7 8 11 12 13 14 15 16 17 18 19 bottom view
board mountable dc-dc converters imy 35 series edition 2/5.2000 14/15 safety of operator accessible output circuit if the output circuit of a dc-dc converter is operator acces- sible, it shall be an selv circuit according to the iec/en 60950 related safety standards the following table shows some possible installation con- figurations, compliance with which causes the output circuit of the dc-dc converter to be an selv circuit according to iec/en 60950 up to a configured output voltage (sum of nominal voltages if in series or +/ configuration) of 42 v. however, it is the sole responsibility of the installer to en- sure the compliance with the relevant and applicable safety regulations. more information is given in: technical infor- mation: safety . 1 the front end output voltage should match the specified input voltage range of the dc-dc converter. 2 the earth connection has to be provided by the installer according to the relevant safety standard, e.g. iec/en 60950. ac-dc front end dc-dc con- verter mains fuse battery earth connection suppressor diode selv earth connection + ~ ~ 10004 fig. 20 schematic safety concept. use fuse, suppressor diode and earth connection as per table: safety concept leading to an selv output circuit . table 18: insulation concept leading to an selv output circuit conditions front end dc-dc converter result supply minimum required grade maximum minimum required type measures to achieve the safety status of voltage of isolation, to be provided dc output safety status of the specified safety status of the dc-dc by the ac-dc front end, voltage front end output the output circuit converter output including mains supplied from the circuit circuit battery charger front end 1 mains operational (i.e. there is 150 v primary imy 35 double or reinforced selv circuit 150 v ac no need for electrical iso- insulation, based on lation between the mains 150 v ac and dc (pro- supply voltage and the vided by the dc-dc dc-dc converter input converter) voltage) mains basic 60 v earthed selv circuit 2 imy 35 operational insulation 250 v ac (provided by the dc-dc converter) 150 v imy 35 supplementary insulation selv circuit based on 250 v ac and double or reinforced insulation, based on the maximum rated output voltage from the front end (provided by the dc-dc converter) double or reinforced 60 v selv circuit imy 35 operational insulation (provided by the dc-dc converter) 120 v tnv-2 circuit imy 35 double or reinforced 150 v double or reinforced insulation, based on the insulated earthed or maximum rated output unearthed hazardous voltage from the front end voltage secondary (provided by the dc-dc circuit converter)
board mountable dc-dc converters imy 35 series edition 2/5.2000 15/15 option -8 extended temperature range extension of the temperature range from standard 40...71 c to 40...85 c. in the upper temperature range the output power derating below should be observed. the modules will provide the specified ouptut power with free air convection cooling. option i inhibit the output of the converter may be enabled or disabled by means of a logic signal (ttl, cmos, etc.) applied to the inhibit pin. no output voltage overshoot will occur when the unit is turned on. if the inhibit function is not required the inhibit (pin 8) should be connected to vi to enable the out- put (active low logic, fail safe). converter operating: 10 v...0.8 v converter inhibited or inhibit pin left open circuit: 2.4 v... u i max fig. 22 if the inhibit is not used the inhibit pin should be con- nected to vi vi+ vi i 06138 4 8 2 1.2 1.0 0.8 0.6 0.4 0 20 20 60 0.2 40 80 p o / p o max t a [ c] 40 0 11047 fig. 21 maximum allowed output power versus ambient tempera- ture. description of options table 19: survey of options option function of option characteristic -8 extended operational ambient temperature range t a = 40...85 c z open frame all models are available without case i inhibit -

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