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imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 1/15 imx series imx 7 series wide input voltage ranges up to 150 v dc 1 or 2 outputs up to 48 v dc 1500...2500 v dc i/o electric strength test ? extremely wide input voltage ranges ? electrical isolation, also between outputs ? emissions below en 55 022 level b. ? immunity to iec/en 61000-4-2, -3, -4, -5 and -6 ? high efficiency (typ. 84%) ? inhibit input, output voltage adjustable ? flex power: flexible load distribution on outputs ? outputs no-load, overload and short-circuit proof ? operating ambient temperature up to ?40...85c ? high reliability and no derating ? 2" x 1" case with 10.5 mm profile ? supplementary insulation safety according to iec/en 60950, ul 1950 1 for 70/110 imx types 50.8 2.0" 2 5.4 1.0" 10. 5 0.4 2" summary the imx 7 series of board mountable 7 watt dc-dc con- verters has been designed according to the latest industry requirements and standards. the converters are particularly suitable for use in mobile or stationary applications in trans- port, railways, industry or telecommunications where vari- able input voltages or high transient voltages are prevalent. covering a total input voltage range from 8.4 v dc up to 150 v dc with four different types the units are available with single and electrically isolated double outputs allowing the configuration of output voltages from 3.3 v dc up to 48 v dc externally adjustable, with flexible load distribution on double output units. an inhibit input allows remote con- verter on/off. features include efficient input and output filtering with un- surpassed transient and surge protection, low output ripple and noise, consistently high efficiency over the entire input voltage range, high reliability as well as excellent dynamic response to load and line changes. the converters provide supplementary insulation with selv outputs as e.g. required in battery supported sys- tems where the bus voltage may exceed the selv limit of 60 v dc. they are designed and built according to the inter- national safety standards iec/en 60950, ul 1950, can/ csa c22.2 no.950-95 and are lga and ul marked. the 70 imx 7 and 110 imx 7 types are ce marked. the circuit comprises of integrated planar magnetics and all components are automatically assembled and solidly soldered onto a single pcb without any wire connections. magnetic feedback ensures maximum reliability and re- peatability in the control loop over all operating conditions. 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 85c in free air without using any potting material. for extremely high vibration environments the case has holes for screw mounting. various options such as extended temperature range ?40...85c an uncased low profile version provide a high level of application specific engineering and design-in flex- ibility. table of contents page summary .......................................................................... 1 model selection ............................................................... 2 part number description ................................................. 3 functional description ..................................................... 3 electrical input data ......................................................... 4 electrical output data ...................................................... 6 page auxiliary functions ......................................................... 19 electromagnetic compatibility (emc) ............................ 11 immunity to environmental conditions .......................... 12 mechanical data ............................................................ 13 safety and installation instructions ................................ 14 description of options ................................................... 15 l g a 1
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 2/15 imx series model selection table 1: part number descriptions output 1 output 2 output power input voltage efficiency type options 2 u o1 nom i o1 nom u o2 nom i o2 nom p o nom range yp designation [v dc] [a] 1 [v dc] [a] 1 [w] [v dc] [%] 3.3 1.5 - - 5 8.4 - 36 79 20 imx 7-03-9 -8, z 3.3 1.5 - - 5 16.8 - 75 3 81 40 imx 7-03-9 -8, z 3.3 1.5 - - 5 40 - 121 79 70 imx 7-03-9 -8 3.3 1.5 - - 5 60 - 150 79 110 imx 7-03-9 -8 5.1 1.2 - - 6.1 8.4 - 36 80 20 imx 7-05-9 -8, z 5.1 1.2 - - 6.1 16.8 - 75 3 81 40 imx 7-05-9 -8, z 5.1 1.2 - - 6.1 40 - 121 80 70 imx 7-05-9 -8 5.1 1.2 - - 6.1 60 - 150 80 110 imx 7-05-9 -8 5 0.6 5 0.6 6 8.4 - 36 82 20 imx 7-05-05-9 -8, z 5 0.7 5 0.7 7 16.8 - 75 3 83 40 imx 7-05-05-9 -8, z 5 0.7 5 0.7 7 40 - 121 82 70 imx 7-05-05-9 -8 5 0.7 5 0.7 7 60 - 150 82 110 imx 7-05-05-9 -8 12 0.25 12 0.25 6 8.4 - 36 84 20 imx 7-12-12-9 -8, z 12 0.3 12 0.3 7.2 16.8 - 75 3 84 40 imx 7-12-12-9 -8, z 12 0.3 12 0.3 7.2 40 - 121 83 70 imx 7-12-12-9 -8 12 0.3 12 0.3 7.2 60 - 150 84 110 imx 7-12-12-9 -8 15 0.2 15 0.2 6 8.4 - 36 84 20 imx 7-15-15-9 -8, z 15 0.24 15 0.24 7.2 16.8 - 75 3 84 40 imx 7-15-15-9 -8, z 15 0.24 15 0.24 7.2 40 - 121 83 70 imx 7-15-15-9 -8 15 0.24 15 0.24 7.2 60 - 150 84 110 imx 7-15-15-9 -8 24 0.13 24 0.13 6.2 8.4 - 36 84 20 imx 7-24-24-9 -8, z 24 0.15 24 0.15 7.2 16.8 - 75 3 84 40 imx 7-24-24-9 -8, z 24 0.15 24 0.15 7.2 40 - 121 83 70 imx 7-24-24-9 -8 24 0.15 24 0.15 7.2 60 - 150 84 110 imx 7-24-24-9 -8 1 flexible load distribution on double outputs possible. 2 for single output models it is recommended to parallel the two outs of dual unit. 3 operation at lower input voltage possible: p o approx. 80% of p o nom at u i min = 14.4 v. 20 imx 7 - 05 - 05 -9 m c z . input voltage range v i 8.4 - 36 v dc ............................................ 20 16.8 - 75 v dc ............................................ 40 40 - 121 v dc ............................................ 70 60 - 150 v dc .......................................... 110 series ........................................................................ imx 7 output voltage type output 1 .................. 03, 05, 12, 15, 24 dash: designates double output unit with two independent electrically isolated outputs ...... output voltage type output 2 ........................ 05, 12, 15, 24 operating ambient temperature range t a ?40 to 71c ................................................ -9 ?40 to 85c (option) ................................... -8 options: 2 (surface mount version - nfnd) .............. m 1 2 (c-pinout - nfnd) ...................................... c 1 2 open frame .................................................. z 1 option m and z excludes option c and vice versa. 2 for delivery lead times contact factory. some types are not recommended for new designs (nfnd = not for new designs). examples: 40 imx 7-05-05-9z: dc-dc converter, input voltage range 16.8 - 75 v, 2 electrically isolated outputs each providing 5 v, 700 ma with no cover. part number description
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 3/15 imx series functional description the imx 7 dc-dc modules are feedback controlled flyback converters using current mode pwm (pulse width modula- tion). see block diagram for single and double output types. in the case of the single output units the output is directly monitored and fed back to the primary control circuit via a pulse transformer, resulting in tight regulation of the output voltage. the r input is referenced to the secondary side and allows for programming of the output voltages in the range 75 to 105% of v o nom using either an external resistor or an external voltage source. in the case of the dual and double output units the output voltage is monitored by a separate transformer winding close to the secondary windings and fed back to the control circuit. the r (trim) input is referenced to the primary side and allows programming of the output voltage in the range 100 to 105% of v o nom by an external resistor or within 75 to 105% of v o nom using an external voltage source. current limitation is provided by the primary circuit, thus limiting the total output power. the inhibit input allows remote converter on/off. pwm 2 2200 pf 10 nf 14 1 2 3 4 11 10 12 13 vi+ ( trim) r i vi vo1 + vo1 vo2 + vo2 n.c. 03042 fig. 2 block diagram, double output types, standard pinout fig. 1 block diagram, single output types, standard pinout pwm 2 2200 pf 13 1 2 3 4 11 10 12 14 vi+ i v i n .c. vo + vo r d 03041
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 4/15 imx series electrical input data general conditions: ?t a = 25c, unless t c is specified. ? connector pins i and vi? interconnected. ? trim or r input not connected. table 2: input data input 20 imx 7 40 imx 7 70 imx 7 110 imx 7 characteristics conditions min typ max min typ max min typ max min typ max unit v i input voltage range 1 t c min ... t c max 8.4 36 16.8 6 75 40 121 60 150 v dc v i nom nominal input voltage i o = 0... i o nom 20 40 70 110 v i sur repetitive surge abs. max input (3 s) 100 voltage 150 v 50 5 4 4 4 t start up converter 2 switch on worst case condition at 0.25 0.5 0.25 0.5 0.25 0.5 0.25 0.5 s start-up time inh. release v i min and full load 0.1 0.1 0.1 0.1 t rise rise time 2 v i nom resistive load 5 5 5 5 ms i o nom capacitive load 12 12 12 12 i i o no load input current i o = 0, v i min ... v i max 15 30 8 15 8 15 8 15 ma c i input capacitance for surge calculation 4.7 0.5 0.2 0.2 f v inh inhibit voltage unit operating ?10...0.8 ?10 ...0.8 ?10 ...0.8 ?10 ...0.8 v dc unit inhibited open or open or open or open or 2.4... v i max 2.4... v i max 2.4...75 2.4...75 i inh inhibit current unit operating ?0.5 ?0.5 ?0.5 ?0.5 ma unit inhibited 1 1 1 1 i i inh input current v i min ... v i max <3.0 <3.0 <3.0 <3.0 if unit shut down i inr p inrush peak current v i = v i nom 7 3.8 3.7 4.2 5.6 a f s switching frequency v i min ... v i max , i o = 0... i o nom approx. 400 approx. 400 approx. 400 approx. 300 khz i i rr reflected i o = 0... i o nom 50 30 20 10 ma pp ripple current v i rfi input rfi level en 55022 3 bbbb conducted and radiated 1 v i min will not be as stated if v o is increased above v o nom by use of the r input. if the output voltage is set to a higher value, v i min will be proportionally increased. 2 measured with a resistive and max. admissible capacitive load. 3 measured with a lead lenght of 0.1 m, leads twisted. double output units with both outputs in parallel. 70/110 imx 7 types need an external capacitor at the input. (e.g. 1 f film or ceramic) 4 see 19 pfl 1: electromagnetic immunity . 5 the dc-dc converter shuts down automatically at approx. 38 v. 6 operation at lower input voltage possible: p o approx. 80% of p o nom at v i min = 14.4 v. 7 source impedance according to prets 300132-2, version 4.3, at v i nom . u o nom u o t start up t rise t 04008 fig. 3 converter start-up and rise time
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 5/15 imx series input transient voltage protection in many applications transient voltages on the input of the converter are always possible. these may be caused for ex- ample by short circuits between vi+ and vi? where the net- work inductance may cause high energy pulses. in order to protect the converters the imx 7 types have a built-in transient protection as per table below: reverse polarity protection at input the suppressor diode on the input also provides for re- verse polarity protection by conducting current in the re- verse direction, thus protecting the unit. an external fuse is required to limit this current: ? for 20 imx 7 a fast 2 a (f2a) fuse is recommended. ? for 40 imx 7 a fast 1 a (f1a) fuse is recommended. ? for 70 imx 7 a fast 0.63 a (f.63a) fuse is recommended. ? for 110 imx 7 a fast 0.63 a (f.63a) fuse is recommended. 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 limit this current further. vi+ vi 0706 4 c l d + i fig. 4 example for external circuitry to comply with iec/en 61000-4-5, level 2 (transzorb d not necessary for 40/70/110 imx 7 types). table 3: built-in transient voltage suppressor type breakdown peak power peak pulse voltage at 1 ms current v br nom p p i pp 20 imx 7 1 over voltage lockout at approx. 38 v 40 imx 7 2 100 v 1500 w 11 a 70 imx 7 2 144 v 600 w 2.9 a 110 imx 7 2 167 v 600 w 2.5 a 1 the built-in overvoltage lockout circuit shuts down the converter at approx. 38 v protecting the input up to 50 v dc. for higher transient voltages an external suppressor or voltage limiting circuit as e.g. for iec/en 61000-4-5, level 2 compliance should be provided. 2 if transients generating currents above the peak pulse current are possible then an external limiting network such as the circuit recommended for iec/en 61000-4-5, level 2 compliance is necessary. table 4: components for external circuitry to comply with iec/en 61000-4-5 circuit ref. 20 imx 7 40 imx 7 70 imx 7 110 imx 7 l 330 h, 0,115 ? , 1 a 330 h, 0,42 ? , 600 ma 1000 h, 2.9 ? , 290 ma 330 h, 0.65 ? , 430 ma tdk sf-t8-110s-01 tdk tsl1110-331kr55 toko 822ly-102k toko 822ly-331k c 68 f, 63 v, 85c 68 f, 100 v, 85c 47 f, 150 v, 85c 200 f, 200 v, 105c d motorola 1.5ke39a n.a. n.a. n.a. to achieve iec/en 61000-4-5, level 2 compliance an addi- tional inductor and capacitor should be provided externally as shown in the figure below. the components should have similar characteristics as listed in table: components for external circuitry to comply with iec/en 61000-4-5 . please note: the suppressor diode d is only necessary for 20 imx 7 types. to withstand 150 v transients according to 19 pfl 1, applicable for 40 imx 7 types, the same external circuitry with similar components as for iec/en 61000-4-5, level 2 compliance can be used. 1 a/div. 10 s/div. 04030 0 1 2 3 4 fig. 5 typical inrush current at v i nom , p o nom vs. time (40 imx 7) measured according to prets 300132-2 (version 4.3)
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 6/15 imx series electrical output data general conditions: ?t a = 25c, unless t c is specified. ? connector pins i and vi? interconnected. ? trim or r input not connected. table 5a: output data for single output units output v o nom 3.3 v 5.1 v characteristics conditions min typ max min typ max unit v o1 output voltage v i nom 3.28 3.32 5.07 5.13 vdc i o nom output current v i min ... v i max 1.5 1.2 a i o l current limit 2 v i nom , t c = 25c 3.0 2.4 ? v o line and load regulation v i min ... v i max i o = (0.05...1) i o nom 1 1 % v o1, 2 output voltage noise v i min ... v i max 5 70 70 mv pp 20/40/70 imx i o = i o nom 6 20 40 20 40 110 imx 40 50 40 50 v o clp output overvoltage 115 130 115 130 % limitation 7 c o ext admissible capacitive load 2500 2000 f v o d dynamic voltage deviat. v i nom 250 250 mv t d load recovery time i o nom 1 / 2 i o nom 11ms regulat vo temperature coefficient v i min ... v i max ? v o / ? t c ( t c min ... t c max ) i o = 0... i o max 0.02 0.02 %/k table 5b: output data for single output units output v o nom 12 v 15 v 24 v characteristics conditions min typ max min typ max min typ max unit v o1 output voltage v i nom 11.90 12.10 14.88 15.12 23.81 24.19 vdc i o nom output 20 imx v i min ... v i max 0.5 0.4 0.26 a current 1 40/70/110 imx 0.6 0.48 0.3 i o l current 20 imx v i nom , t c = 25c 1.0 0.95 0.5 limit 2, 3 40/70/110 imx 1.2 1.1 0.6 ? v o line regulation v i min ... v i max , i o nom 1 1 1 % ? v o l load regulation 4 v i nom 3 3 3 i o = (0.1...1) i o nom v o1, 2 output voltage noise v i min ... v i max 5 120 150 240 mv pp i o = i o nom 6 25 50 30 60 50 100 v o clp output overvoltage limit. 7 minimum load 1% 115 130 115 130 115 130 % c o ext admissible 300 200 100 f capacitive load 3 v o d dynamic voltage deviat. v i nom 330 350 600 mv t d load recovery time i o nom 1 / 2 i o nom 111ms regulat. vo temperature coefficient v i min ... v i max ? v o / ? t c ( t c min ... t c max ) i o = 0... i o max 0.02 0.02 0.02 %/k 1 each output is capable of delivering full output power, p o nom according to table: model selection . 2 the current limit is primary side controlled. 3 measured with both outputs connected in parallel. 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 the overvoltage protection is not tracking with the r control.
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 7/15 imx series table 5c: output data for double output units output v o nom 2 x 5 v 2 x 12 v 2 x 15 v 2 x 24 v characteristics conditions min typ max min typ max min typ max min typ max unit v o1 output voltage v i nom 4.96 5.04 11.90 12.10 14.88 15.12 23.81 24.19 vdc v o2 i o = 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 20 imx v i min ... v i max 2 0.6 2 0.25 2 0.2 2 0.13 a current 1 40/70/110 imx 2 0.7 2 0.3 2 0.24 2 0.15 i o l current 20 imx v i nom , t c = 25c 2.4 1.0 0.95 0.5 limit 2, 3 40/70/110 imx 2.8 1.2 1.1 0.6 ? v o line regulation v i min ... v i max , i o nom 1 1 1 1 % ? v o l load regulation 4 v i nom 3 3 3 3 i o = (0.1...1) i o nom v o1, 2 output voltage noise v i min ... v i max 5 80 120 150 240 mv pp i o = i o nom 6 20 40 25 50 30 60 50 100 v o clp output overvoltage limit. 7 minimum load 1% 115 130 115 130 115 130 115 130 % c o ext admissible 2000 300 200 -100 f capacitive load 3 v o d dynamic voltage deviat. v i nom 150 330 350 600 mv t d load recovery time i o nom 1 / 2 i o nom 1111ms regulat. vo temperature coefficient v i min ... v i max ? v o / ? t c ( t c min ... t c max ) i o = 0... i o max 0.02 0.02 0.02 0.02 %/k 1 each output is capable of delivering full output power, p o nom according to table: model selection . 2 the current limit is primary side controlled. 3 measured with both outputs connected in parallel. 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 the overvoltage protection is not tracking with the r control.
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 8/15 imx series short circuit behaviour the current limit characteristic shuts down the converter whenever a short circuit is applied to its output. it acts self- protecting and automatically recovers after removal of the overload condition (hiccup mode). 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: 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 inte- gration into a system. the thermal conditions are influenced by input voltage, output current, airflow, temperature of sur- rounding components and surfaces and the properties of the printed circuit board. t a max is therefore only an indica- tive value and under practical operating conditions, the am- bient 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 speci- fied maximum value. the installer must ensure that un- der all operating conditions t c remains within the limits stated in the table: temperature specifications. connection in series or in parallel connection in series: the outputs of single or double output units can be con- nected in series without any precautions, taking into consid- eration that the highest output voltage should remain below 60 v for selv operation. connection in parallel: double outputsof the same converter with equal output voltage (e.g. 5v / 5v) can be put in parallel and will share their output currents almost equally. parallel operation of single or double outputs of two or more converters with the same output voltage may cause start-up problems at initial start-up. this is only advisable in applications where one converter is able to deliver the full load current as required in true redundant systems. output overvoltage protection the outputs of single output units and -05-05- types are protected against overvoltages by a second control loop. in the event of an overvoltage on the output the unit will shut- down and attempt to restart approximately every 0.4 sec- onds. double output units (with exception of the -05-05- types) are protected against overvoltages by a zener diode across the second output. under worst case conditions the zener diode will short circuit. since with double output units both outputs track each other the protection diode is only provided in one of the outputs. the main purpose of this fea- ture is to protect against possible overvoltages which could occur due to a failure in the feedback control circuit. the output overvoltage protection is not designed to withstand externally applied overvoltages. fig. 8 v o1 versus i o1 (typ) for various i o2 (2 x 12 v). the cross load effect is negligible. fig. 6 v o versus i o (typ) of single output units with v o = 5.1 v. fig. 7 v o versus i o (typ) of double output units, with both outputs in parallel. 7 8 9 10 11 1 2 13 u o [v] 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 i o total [a] 0 05086 5 .5 5 .0 4 .5 4 .0 3 .5 3 .0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 i o [a ] u o [v] 05087 u o1 , u o2 [v] i o1 i o1 nom 05039 1 4 1 3 1 2 1 1 1 0 025 50 75 100 150 [% ] u o2 u o1 125 fig. 9 flexible load distribution on double outputs (2 x12 v) with load variation from 0...150% of p o1 nom on output 1. output 2 loaded with 25% of p o2 nom . typical performance curves 1 1.0 1 1.5 1 2.0 1 2.5 1 3.0 1 3.5 u o1 [v] 0.03 0.10 0.15 0.20 0.25 0.35 i o1 [ a] 0.05 05088 i o2 = 0.3 a i o2 = 0.03 a
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 9/15 imx series 70 1 00 u o [%] t [m s] 0504 1 8.5 60.5 60.5 overload short circuit condition switch-off 40 50 60 70 80 90 h [%] 05052 25 50 75 100 p o p o nom [% ] u i nom u i max u i min fig. 10 overload switch-off (hiccup mode). typical values. frequency of pulses: 16.5 hz, puls duration: 8.5 ms. fig. 11 efficiency versus input voltage and load. typical values (40 imx 7-12-12). adjustable output voltage (r input) as a standard feature, the imx 7 single and double output units offer adjustable output voltage(s) by using the control input r. if the r pin is left open circuit the output voltage is set to v o nom . the output voltage is adjustable in the range 75...105 % of v o nom .the circuit works for single and double output units in a different way. for output voltages v o > v o nom , the minimum input voltage v i min (see: electrical in- put data ) increases proportionally to v o / v o nom . single output units: the r input is referenced to the secondary side of the con- verter. adjustment of the output voltage is possible by means of either an external resistor or a voltage source. a) adjustment by means of an external resistor r ext1 : depending upon the value of the required output voltage, the resistor shall be connected either: between the r pin and vo? to achieve an output voltage adjustment range of approximately v o = 75...100 % v o nom . (85...100% for 3.3 v outputs) v o r ext1 = 4 k ? ? ????????? v o nom ? v o or: between the r pin and vo+ to achieve an output volt- age range of approximately v o = 100...105 % v o nom . ( v o ? 2.5 v) r ext 2 = 4 k ? ? ??????????????????? 2.5 v ? ( v o / v o nom ? 1) auxiliary functions inhibit function the output(s) 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 should be connected to vi? to enable the output (active low logic, fail safe). converter operating: ?10 v...0.8 v converter inhibited or inhibit pin left open: 2.4 v... v i max (<75 v for 70/110 imx 7) fig. 12 if the inhibit is not used the inhibit pin should be con- nected to vi? vi+ vi i 0607 0
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 10/15 imx series r vo+ vo + u e xt 4 k ? u ref 2.5 v control circuit v i+ v i r ext1 r ext 2 06029 fig. 13 output voltage control for single output units by means of the r-input double output units: the r input (trim) input is referenced to the primary side. the figure below shows the circuit topology. adjustment of the output voltage is possible by means of either an exter- nal resistor in the range of 100...105% of v o nom , or an ex- ternal voltage source in the range of 75...105% of v o nom . r (trim) vo1+ vo2 + u ext vi+ vi r ext vo1 vo2+ 0603 0 control circuit u ref 2.5 v fig. 14 output voltage control for double output units by means of the r input a) adjustment by means of an external resistor. programming of the output voltage by means of an ex- ternal resistor r ext1 is possible within a limited range of 100...105% of v o nom . r ext1 should be connected be- tween the r-pin and vi?. connection of r ext1 to vi+ may damage the converter. the following table indicates suit- able resistor values for typical output voltages under nominal conditions ( v i nom , i o = 0.5 i o nom ), with either par- alleled outputs or equal load conditions on each output. b) adjustment by means of an external voltage source v ext . for external output voltage programming in the range 75...105% of v o nom a (0...20 v) source v ext is required, connected to the r-pin and vi?. the table below indi- cates typical v o versus v ext values under nominal condi- tions ( v i nom , i o = 0.5 i o nom ), with either paralleled outputs or equal load conditions on each output. applying a con- trol voltage greater than 20 v will set the converter into a hiccup mode. direct paralleling of the r-pins of units connected in parallel is feasible. table 7: v ext for u o = 75...105% v o nom ; typical values (v i nom , i o1, 2 = 0.5 i o1/2 nom ) v o [% u o nom ] v ext [v] ?105 0 102 1.6 95 4.5 85 9 75 13 b) adjustment by means of an external voltage v ext be- tween vo? and r pins. the control voltage range is 1.87...2.62 v and allows for an adjustment in the range of approximately 75...105%. (85...105% for 3.3 v outputs) v o ? 2.5 v v ext = ????????? v o nom attempting to adjust the output below this range will cause the converter to shutdown (hiccup mode). note: applying an external control voltage >2.75 v may damage the converter. table 6: r ext1 for v o > v o nom ; approximate values (v i nom , i o1, 2 = 0.5 i o1/2 nom ) v o [% v o nom ] r ext [k ? ] 105...108 (107 typically) 0 105 1.5 104 5.6 103 12 102 27 101 68 100
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 11/15 imx series 07023 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] mh z 0 .02 40 35 30 25 20 15 10 0 30 40 50 100 200 300 1 000 60 80 [mh z] en 55022 b [db v/m] 400 500 600 800 07024 electromagnetic emission conducted rfi noise at input according to en 55022 radiated rfi noise according to en 55022. electromagnetic immunity table 8: 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 i pin connec. to vi? discharges 3 air discharge 8000 v p r pin open i pin connec. to vi? 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 s 2 ? 5 pos. and 5 neg. yes b 61000-4-5 5 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 19 pfl 1 4 +i/?i 150 v p 0.1/0.3 ms limited to 3 positive yes b <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 for 40 imx 7 types (additional external components required). not applicable for 20 imx 7 types. 5 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. (40 imx 7-15-15). external capacitor (1 f ceramic or film) required at the input for 70 imx 7, 110 imx 7 types. fig. 16 typical radio frequency-interference voltage at v i nom , i o nom , measured with an antenna (distance 10 m). output leads 0.1 m, twisted (70 imx-7-15-15).
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 12/15 imx series immunity to environmental conditions table 9: environmental testing 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) 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) fh vibration, iec/en 60068-2-64 acceleration spectral density: 0.05 g n 2 /hz unit broad-band mil-std-810d section 514.3 frequency band: 20...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/din iec 60068-2-52 concentration: 5% (30c) unit not (sodium chloride duration: 2 h per cycle operating nacl solution) s torage: 40 c, 93% rel. humidity storage duration: 22 h per cycle number of cycles: 3 table 10: temperature specifications, valid for air pressure of 800...1200 hpa (800...1200 mbar) temperature standard -9 option -8 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 ?40 100 ?55 105 1 mil-std-810d section 501.2 and 502.2 2 see: thermal considerations table 11: mtbf and device hours mtbf ground benign ground fixed ground mobile mtbf acc. to mil-hdbk-217f t c = 40c t c = 40c t c = 70c t c = 50c 40 imx 7-05-9 1,671,700 h 248,000 h 83,800 h 84,800 h 40 imx 7-15-15-9 1,640,000 h 214,000 h 83,000 h 77,000 h
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 13/15 imx series mechanical data dimensions in mm. tolerances 0.3 mm unless otherwise indicated. fig. 17 case imx 7 with standard soldering pins weight: <20 g 50.8 (2") 3.81(0.15") 3.81(0.15") 3.81(0.15") 5 x 3.81 (0.15") 20.3 (0.8") 3 x 5.08 (0.2") pt 2.2 self tapping screws 1 4 10 14 0.8 1.2 (0.03 x 0.05") pin s ? 1.6 (0.06) pcb holes 10.5 (0.41") 3.4 (0.13") 45.7 (1.8") 25.4 (1") 4 .6 (0.18") s09030 measuring point of case temperature t c european projection fig. 18 open frame (option z) weight: <20 g 43.2 (1.7") s90002 48 (1.9") 5 x 3.81 (0.15") 1.27 (0.05 ") 23 (0.9") 8.25 ( 0.32") 3 x 5.08 (0.2") 1 4 10 14 3.5 (0.14") 1.2 (0.5")
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 14/15 imx series safety and installation instructions installation instruction 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 according to: mechanical data . 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 f2a for 20 imx 7 and f1a for 40 imx 7 and f0.63a for 70/110 imx 7 types. cleaning agents in order to avoid possible damage, any penetration of cleaning fluids has to be prevented, since the power sup- plies are not hermetically sealed. standards and approvals all dc-dc converters are pending to be ul recognized according 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 ? supplementary 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 1500 v for 20/40 imx 7, 2000 v for 70 imx 7 and 2500 v for 110 imx 7 types. the dc-dc converters are subject to manufacturing sur- veillance in accordance with the above mentioned ul, csa, en and iso 9001 standards. protection degree the protection degree of the dc-dc converters is ip 30. fig. 19 pin allocation standard pinout bottom view 1 4 10 14 10011 2 3 11 12 13 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 12: electric strength test voltages characteristic i/o o/o unit 20/40 imx 70 imx 110 imx electric strength 1.2 1.5 2.0 0.1 kv rms test voltage 1 s 1.5 2.0 2.5 0.15 kv dc coupling 1.2 1.2 1.2 - nf capacitance insulation resist. >100 >100 >100 - m ? at 500 v dc partial discharge consult factory - kv extinction voltage table 13: pin allocation, standard pinout pin single output double output 1vi+ vi+ 2vi? vi? 3i i 4 n.c. r (t rim) 10 vo? vo1? 11 vo+ vo1+ 12 vo? vo2? 13 r vo2+ 14 n.c. n.c.
imx 7 dc/dc series data sheet 7w board mountable converter rev. oct 01, 2003 15/15 imx series ac-dc front end dc-dc con- verter m ains fuse battery earth connection suppressor diode sel v earth connection + ~ ~ 1000 4 fig. 20 schematic safety concept. use fuse, suppressor diode and earth connection as per table: safety concept leading to an selv output circuit . table 16: insulation concept leading to an selv output circuit conditions front end dc-dc converter result supply minimum required grade maximum minimum required safety measures to achieve the safety status of voltage of isolation, to be provided dc output status of the front end specified safety status of the the dc-dc by the ac-dc front end, voltage output circuit output circuit converter output including mains supplied from the circuit battery charger front end 1 mains basic <60 v earthed selv circuit 2 operational insulation (pro- selv circuit -250 v ac vided by the dc-dc converter) elv circuit input fuse 3 output suppressor earthed selv >60 v hazardous voltage diode(s) 4 , and earthed circuit secondary circuit output circuit(s) 2 double or reinforced <60 v selv circuit operational insulation (pro- selv circuit vided by the dc-dc converter) >60 v tnv-2 circuit supplementary insulation, double or reinforced insu- based on the maximum input lated unearthed hazardous voltage (provided by the voltage secondary circuit 5 dc-dc converter) 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. 3 the installer shall provide an approved fuse (type with the lowest rating suitable for the application) in a non-earthed input line directly at the input of the dc-dc converter (see fig.: schematic safety concept ). for ul?s purpose, the fuse needs to be ul-listed. see also: input fuse . 4 each suppressor diode should be dimensioned in such a way, that in the case of an insulation fault the diode is able to limit t he output voltage to selv (<60 v) until the input fuse blows (see fig.: schematic safety concept ). 5 has to be insulated from earth by basic insulation according to the relevant safety standard, based on the maximum output volta ge from the front end. 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 iec/en 60950 related safety standards. the insulation concept table below shows some possible installation configurations, compliance with which causes the output circuit of the dc-dc converter to be an selv cir- cuit according to iec/en 60950 up to a configured output voltage (sum of nominal voltages if in series or +/? configu- ration) of 46 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 . description of options table 17: survey of options option function characteristics -8 operational temperature range t a = ?40 to 85c extended temperature range. z open frame option -8 extension of the temperature range from standard ?25 to 71 c to ?40 to 85 c. the module will provide full output power with free air convection cooling. ul recognition up to 80c.

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