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bcd20007-g rev ae, 14-may-2012 page 1 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters 50.8 2.0" 25.4 1.0" 10.5 0.42" features ? rohs lead-free-solder and lead-solder-exempted products are available. input voltage ranges up to 150 vdc 1 or 2 isolated outputs up to 48 v 1200 to 2000 vac i/o electric strength test extremely wide input voltage ranges immunity according to iec/en 61000-4-2, -3, -4, -5, -6 high efficiency (typ. 84%) ? input undervoltage lockout inhibit input, adjustable output voltages 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 supplementary insulation planar technology for best mechanical stability 2? 1? case with 10.5 mm profile description the imx7/ims7 series of board-mountable 7 watt dc-dc converters have been designed according to the latest industry requirements and standards. the converters are particularly suitable for use in mobile or stationary applications in transport, railways, industry, or telecom, where variable input voltages or high transient voltages are prevailent. covering a total input voltage range from 8.4 v to 150 v with six different models, the converters are available with single and electrically-isolated double outputs from 3.3 up to 48 v with flexible load distribution on double outputs. a shutdown input allows remote on/off. features include efficient input and output filtering with good 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 provide supplementary insulation with selv outputs as for instances required in battery-supported systems, where the bus voltage may exceed the selv limit of 60 v. the models 70imx7 and 110imx7 are ce-marked. the circuitry is comprised of integral planar magnetics. all components are automatically assembled and securely soldered onto a single pcb without any wire connections. magnetic feedback ensures maximum reliability and repeatability 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 85 c in free air without using any potting material. for extremely high vibration environments the case has holes for screw mounting. several options, such as open-frame, provide a high level of application-specific engineering and design-in flexibility. table of contents page page description ............................................................................ 1 model selection ..................................................................... 2 functional description .......................................................... 3 electrical input data .............................................................. 4 electrical output data ............................................................ 7 auxiliary functions ................................................................. 9 electromagnetic compatibility (emc) ................................. 11 immunity to environmental conditions ............................... 12 mechanical data .................................................................. 13 safety and installation instructions ..................................... 13 description of options ........................................................ 14 safety-approved to iec 60950-1 and ul/csa 60950-1 2 nd edition. 1 70/110imx7 models 1
bcd20007-g rev ae, 14-may-2012 page 2 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters model selection table 1: model selection output 1 output 2 1 output power input voltage efficiency model options v o1 nom i o1 nom v o2 nom i o2 nom p o nom range ? ? min ? ? typ [ v] [ a ] [ v] [a] 1 [ w ] [ v] [%] [%] 3.3 1.5 - - 5 8.4 ? 36 74 78 20imx7-03-8 z, g 3.3 1.5 - - 5 14 ? 36 75.5 79 24ims7-03-9 z, g 3.3 1.5 - - 5 16.8 2 ? 75 74.7 79 40imx7-03-8 z, g 3.3 1.5 - - 5 36 ? 75 77 79 48ims7-03-9 z, g 3.3 1.5 - - 5 40 ? 121 76 78 70imx7-03-8 z, g 3.3 1.5 - - 5 60 ? 150 2 74.5 78 1 10imx7-03-8 z, g 5.1 1.2 - - 6.1 8.4 ? 36 75.5 78 20imx7-05-8 m, z, g 5.1 1.2 - - 6.1 14 ? 36 77 80 24ims7-05-9 z, g 5.1 1.2 - - 6.1 16.8 2 ? 75 79 81 40imx7-05-8 m , z, g 5.1 1.2 - - 6.1 36 ? 75 78 81 48ims7-05-9 z, g 5.1 1.2 - - 6.1 40 ? 121 75.5 78 70imx7-05-8 m , z, g 5.1 1.2 - - 6.1 60 ? 150 3 76 79 110imx7-05-8 m, z, g 5 0.6 5 0.6 6 8.4 ? 36 77 81 20imx7-05-05-8 m, z, g 5 0.7 5 0.7 7 14 ? 36 79 82 24ims7-05-05-9 z, g 5 0.7 5 0.7 7 16.8 2 ? 75 79.5 82 40imx7-05-05-8 m, z, g 5 0.7 5 0.7 7 36 ? 75 81.5 83 48ims7-05-05-9 z, g 5 0.7 5 0.7 7 40 ? 121 81 82 70imx7-05-05-8 m, z, g 5 0.7 5 0.7 7 60 ? 150 3 78 80 110imx7-05-05-8 m , z, g 12 0.25 12 0.25 6 8.4 ? 36 80.5 83 20imx7-12-12-8 m, z, g 12 0.3 12 0.3 7.2 14 ? 36 81.5 85 24ims7-12-12-9 z, g 12 0.3 12 0.3 7.2 16.8 2 ? 75 82.5 84 40imx7-12-12-8 m, z, g 12 0.3 12 0.3 7.2 36 ? 75 82 84 48ims7-12-12-9 z, g 12 0.3 12 0.3 7.2 40 ? 121 83 85 70imx7-12-12-8 m, z, g 12 0.3 12 0.3 7.2 60 ? 150 3 80 83 110imx7-12-12-8 m , z, g 15 0.2 15 0.2 6 8.4 ? 36 81 83 20imx7-15-15-8 m, z, g 15 0.24 15 0.24 7.2 14 ? 36 81.5 84 24ims7-15-15-9 z, g 15 0.24 15 0.24 7.2 16.8 2 ? 75 81 84 40imx7-15-15-8 m, z, g 15 0.24 15 0.24 7.2 36 ? 75 82 84 48ims7-15-15-9 z, g 15 0.24 15 0.24 7.2 40 ? 121 81.5 83 70imx7-15-15-8 m, z, g 15 0.24 15 0.24 7.2 60 ? 150 3 79 82 110imx7-15-15-8 m, z, g 24 0.13 24 0.13 6.2 8.4 ? 36 79 83 20imx7-24-24-8 m, z, g 24 0.15 24 0.15 7.2 14 ? 36 82 84 24ims7-24-24-9 z, g 24 0.15 24 0.15 7.2 16.8 2 ? 75 82 84 40imx7-24-24-8 m, z, g 24 0.15 24 0.15 7.2 36 ? 75 82 84 48ims7-24-24-9 z, g 24 0.15 24 0.15 7.2 40 ? 121 80 83 70imx7-24-24-8 m , z, g 24 0.15 24 0.15 7.2 60 ? 150 3 81 84 110imx7-24-24-8 m , z, g 1 flexible load distribution on double-outputs possible. if only one output is used, connect both outputs of double-output models in parallel. 2 operation at low input voltage possible, if p o is reduced to approx. 80% of p o nom at v i min = 14.1 v. 3 up to 154 v for 2 s nfnd: not for new designs. preferred for new designs note : use 20imx7 to replace 24ims7 and 40imx7 to replace 48ims7.
bcd20007-g rev ae, 14-may-2012 page 3 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters functional description the imx7/ims7 series dc-dc converters are feedback- controlled flyback converters using current mode pwm (pulse width modulation). in the case of single-output models, the output is directly sensed 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 the output voltages in the range 75 to 105% of v o nom , using either an external resistor or an external voltage source. for double-output models, the output voltage is sensed by a separate transformer winding close to the secondary and fed fig. 2 block diagram of dual-output models fig. 1 block diagram of single-output models back to the primary control circuit. close magnetic coupling is provided by the planar construction, ensuring very good regulation, and allowing for flexible load distribution. the trim input of double-output models is referenced to the primary side, and allows for programming the output voltages in the range of 100 to 105% of v o nom by means of an external resistor, or within 75 to 100% of v o nom , using an external voltage source. current limitation is provided by the primary circuit, thus limiting the total output current ( i o nom for the single- and the sum i o1 nom + i o2 nom for double-output models). the inhibit input i allows remote control of the outputs; pin i must be connected to vi? to activate the converter. part number description input voltage range v i 8.4 ? 36 v .............................................. 20 14 ? 36 v ............................................... 24 16.8 ? 75 v ............................................ 40 36 ? 75 v ............................................... 48 40 ? 121 v ............................................. 70 60 ? 150 v ........................................... 110 series .............................................................. imx7, ims7 output voltage of output 1 ...................... 03, 05, 12, 15, 24 output voltage of output 2 ............................ 05, 12, 15, 24 operating ambient temperature t a ?40 to 85 c ............................................... -8 ?40 to 71 c ............................................... -9 options: surface mount version 1 ........................................... m open frame 1 ..................................................................... z rohs-compliant for all six substances ...... g obsolete option: c-pinout .............................................. c 1 option m and z exclude each other. note: the sequence of options must follow the order above. example: 40imx7-05-05-8zg: dc-dc converter, input voltage range 16.8 ? 75 v, 2 outputs providing each 5 v, 700 ma, temperature range ? 40 to 85 c, open frame, rohs compliant for all six substances. 40 imx7 - 05 - 05 -8 z g pwm 2 2200 pf 1500 v 13 1 2 3 4 11 10 12 14 vi+ i vi? n.c. vo+ vo ? r n.c. 03025a pwm 2 2200 pf 14 1 2 3 4 11 10 12 13 vi+ trim i vi ? vo1+ vo1? vo2+ vo2? n.c. 03042b
bcd20007-g rev ae, 14-may-2012 page 4 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters electrical input data general conditions: ?t a = 25 c, unless t c is specified. ? connector pin i connected with vi?. ? trim or r input not connected. table 2a: input data of imx7 input 20imx7 40imx7 70imx7 110imx7 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 v i nom nominal input voltage i o = 0 ? i o nom 20 40 70 110 v i sur repetitive surge voltage abs. max input (3 s) 50 5 100 150 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 converter operating ?10 +0.8 ?10 +0.8 ?10 +0.8 ?10 +0.8 v converter inhibited 2.4 v i max 2.4 v i max 2.4 v i max 2.4 v i max or open or open or open or open i inh inhibit current converter operating ?0.5 ?0.5 ? 0.5 ? 0.5 ma converter inhibited 1 1 1 1 i i inh input current when the v i min ? v i max 3333 converter is inhibited i inr p inrush peak current v i = v i nom 4 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 ripple current i o = 0 ? i o nom 50 30 20 10 ma pp v i rfi input rfi level conducted en 55022 3 aaaa 1 v i min will not be as stated, if v o is increased above v o nom by use of the r or trim input. if the output voltage is set to a higher value, v i min will be proportionally increased. 2 measured with a resistive and the max. admissible capacitive load. 3 measured with a lead length of 0.1 m, leads twisted. double-output models with both outputs in parallel. 70/110 imx7 models nee d an external capacitor at the input, e.g., 1 f film or ceramic. 4 source impedance according to ets 300132-2, version 4.3, at v i nom . 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. fig. 3 converter start-up and rise time v o nom v o t start up t rise t 04008a
bcd20007-g rev ae, 14-may-2012 page 5 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters table 2b: input data of ims7; general conditions as in table 2a input 24ims7 48ims7 characteristics conditions min typ max min typ max unit v i input voltage range 1 t c min ? t c max 14 36 36 75 v v i nom nominal input voltage i o = 0 ? i o nom 24 48 v i sur repetitive surge voltage abs. max input (3 s) 50 100 t start up converter 2 switch on worst case condition at 0.25 0.5 0.25 0.5 s start-up time inh. release v i min and full load 0.1 0.1 t rise rise time 2 v i nom resistive load 5 5 ms i o nom capacitive load 12 12 i i o no load input current i o = 0, v i min ? v i max 12 24 6 12 ma c i input capacitance (for surge calculation) 0.8 0.5 f v inh inhibit voltage converter operating ?10 +0.8 ?10 +0.8 v converter inhibited 2.4 v i max 2.4 v i max or open or open i inh inhibit current converter operating ?0.5 ?0.5 ma converter inhibited 1 1 i i inh input current when the v i min ? v i max 33 converter is inhibited i inr p inrush peak current v i = v i nom 4 4.0 3.9 a f s switching frequency v i min ? v i max , i o = 0 ? i o nom approx. 330 approx. 330 khz i i rr reflected ripple current i o = 0 ? i o nom 40 30 ma pp v i rfi input rfi level conducted en 55022 3 aa 1 v i min will not be as stated, if v o is increased above v o nom by use of the r or trim input. if the output voltage is set to a higher value, v i min will be proportionally increased. 2 measured with a resistive and the max. admissible capacitive load. 3 measured with a lead length of 0.1 m, leads twisted. double-output models with both outputs in parallel. 70 /110 imx7 models nee d an external capacitor at the input, e.g. 1 f film or ceramic. 4 source impedance according to ets 300132-2, version 4.3, at v i nom
bcd20007-g rev ae, 14-may-2012 page 6 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters input transient voltage protection in many applications transient voltages on the input of the converter may occur and are possibly caused by short circuits between vi+ and vi?, where the network inductance may cause high energy pulses. in order to protect the converters, transient suppressors are fitted to the input; see table below: table 3: built-in transient voltage suppressor model breakdown peak power peak pulse voltage at 1 ms current v br nom p p i pp 20imx7 1 overvoltage lockout at approx. 38 v 24ims7 2 53 v 600 w 7.7 a 40imx7 2 100 v 1500 w 11 a 48ims7 2 100 v 600 w 4.1 a 70imx7 2 144 v 600 w 2.9 a 110imx7 2 167 v 600 w 2.5 a 1 the built-in overvoltage trigger shuts down the converter at approx. 38 v protecting the input up to 50 v. 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, an external limiting network such as the circuit recommended for iec/en 61000-4-5, level 2 compliance, is necessary. to achieve iec/en 61000-4-5, level 2 compliance, an additional inductor and capacitor should be provided externally as shown in the figure below. the components should have similar characteristics as listed in table 4. input fuse and reverse polarity protection the suppressor diode on the input also provides for reverse polarity protection by conducting current in the reverse direction, thus protecting the converter. an external fuse is required to limit this current. we recommend for: ? 20imx7 and 24ims7 a fast 2 a (f2a) fuse ? 40imx7 and 48ims7 a fast 1 a (f1a) fuse ? 70imx7 a fast 0.63 a (f.63a) fuse ? 110imx7 a fast 0.63 a (f.63a) fuse. 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. fig. 5 typical inrush current at v i nom , p o nom measured according to ets 300132-2 (40imx7). 0 1 2 3 a 0 20 40 60 80 s 04030a 4 table 4: components for external circuitry to comply with iec/en 61000-4-5 model l c d 20imx7 330 h, 1 a, 0.115 ? 68 f, 63 v 1.5ke39a 24ims7 330 h, 0.6 a, 0.42 ? 68 f, 63 v n.a. 40imx7 330 h, 0.6 a, 0.42 ? 68 f, 100 v n.a. 48ims7 330 h, 0.6 a, 0.42 ? 68 f, 100 v n.a. 70imx7 1000 h, 0.6 a, 0.42 ? 68 f, 100 v n.a. 110imx7 330 h, 0.2 a 200 f, 200 v n.a. note: suppressor diode d is only necessary for 20imx7 models. to withstand 150 v transients according to 19 pfl 1, applicable for 40 imx7 models, the same external circuitry with similar components as for iec/en 61000-4-5, level 2 compliance can be used. fig. 4 example for external circuitry to comply with iec/en 61000-4-5, level 2 (transzorb d only for 20imx7). vi+ vi? 07064 c l d + i
bcd20007-g rev ae, 14-may-2012 page 7 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters electrical output data general conditions: ?t a = 25 c, unless t c is specified. ? pin i connected with vi ?; trim or r input left open-circuit. table 5a: output data for single-output models output v o nom 3.3 v 5.1 v unit characteristics conditions min typ max min typ max v o output voltage setting v i nom 3.28 3.32 5.07 5.13 v i o nom output current (nom.) v i min ? v i max 1.5 1.2 a i o l current limit 2 v i nom 1.78 2.7 1.56 2.0 ? v o line and load regulation v i min ? v i max 1 1 % i o = (0.05 ? 1) i o nom v o output voltage noise v i min ? v i max 5 70 70 mv pp other models i o = i o nom 6 20 40 20 40 110imx7 40 50 40 50 v o clp output overvoltage limit 7 minimum load 1% 115 130 115 130 % c o ext admissible capacitiv e load 2500 2000 f v o d dynamic volt age deviat. v i nom 250 250 mv t d load recovery time i o nom ? 1 / 2 i o nom 11m s regulation vo temperature coefficient v i min ? v i max 0.02 0.02 %/k ? v o / ? t c ( t c min to t c max ) i o = (0.05 ? 1) i o nom table 5b: output data for double-output models output v o nom 2 5 v 2 12 v 2 15 v 2 24 v unit characteristics conditions min typ max min typ max min typ max min typ max v o1 output voltage imx7 v i nom 4.96 5.04 11.90 12.10 14.88 15.12 23.81 24.19 v v o2 setting 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 v o1 ims7 v i nom 4.92 5.08 11.82 12.18 14.78 15.22 23.64 24.36 v o2 i o1 = i o2 = 0.5 i o nom 4.92 5.08 11.82 12.18 14.78 15.22 23.64 24.36 i o nom output current 20imx7 v i min ? v i max 2 0.6 2 0.25 2 0.2 2 0.13 a (nom.) 1 other models 2 0.7 2 0.3 2 0.24 2 0.15 i o l current 20imx7 v i nom 1.8 2.1 0.7 0.9 0.5 0.7 0.35 0.45 limit 2 3 other models 1.8 2.0 0.8 1.0 0.55 0.9 0.38 0.5 ? v o1 line regulation v i min ? v i max , i o nom 1 1 1 1 % ? v o l load regulation 4 v i nom , (0.1 ? 1) i o nom 3 3 3 3 v o1, 2 output voltage noise v i min ? v i ma 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 capacitive load 3 2000 300 200 100 f v o d dynamic volt age deviat. v i nom 150 330 350 600 mv t d load recovery time i o nom ? 1 / 2 i o nom 11 1 1m s regulation vo temperature coefficient v i min ? v i max 0.02 0.02 0.02 0.02 %/k of output voltage (0.05 ? 1) i o nom 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. i o l is defined when v o dropped to 85 to 94%. 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.
bcd20007-g rev ae, 14-may-2012 page 8 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters thermal considerations if the 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 (see mechanical data) will approach 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, such as 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, t a may be higher or lower. caution: the case temperature t c measured at the measuring point of case temperature (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. fig. 8a v o versus i o (typ.) of single-output models with v o = 5.1 v fig. 8b v o versus i o (typ.) of double-output models (2 12 v) with both outputs in parallel 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 overvoltage 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 overvoltage, 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 or parallel the outputs of single- or double-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. both outputs of double-output models can be connected in parallel without any precautions. several converters (single- or double-output models) with equal output voltage can be put 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. fig. 7 overload switch-off (hiccup mode). 5.5 5.0 4.5 4.0 3.5 3.0 0 0.4 0.8 1.2 1.6 i o [a] v o [v] 05087a 1.0 0.8 0.6 0.4 0 0.2 20 40 60 80 100 c p o / p o max jm017 t a 0.5 m/s = 100 lfm natural cooling 70 100 v o [%] t 05041b 0.3 s overload short-circuit condition switch-off 0 fig. 6 maximum allowed output power versus ambient temperature 7 8 9 10 11 12 13 v o [v] 0.2 0.4 0.6 0.8 i o total [a] 0 05086b
bcd20007-g rev ae, 14-may-2012 page 9 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters fig. 10 flexible load distribution on double-outputs models (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 typical performance curves fig. 9 cross load regulation (typ.) of double-output models (2 12 v). the cross-load effect is negligible. 11 11.5 12 12.5 13 13.5 v o1 [v] 0.10 0.15 0.20 0.25 0.3 i o1 [a] 0.05 05088a i o2 = 0.3 a i o2 = 0.03 a fig. 11 efficiency versus input voltage and load. typical values (40imx7-12-12-8). 40 50 60 70 80 90 05052a 25 50 75 100 % p o p o nom v i nom v i max v i min [%] 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 converter 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 to 0.8 v converter inhibited or inhibit pin i left open: 2.4 v to v i max (20/40imx7, 24/48ims7) 2.4 v to 75 v (70/110imx7) adjustable output voltage as a standard feature, all imx7 and ims7 converters offer adjustable output voltage(s) by using a control pin. if this pin is left open-circuit, the output voltage is set to v o nom . the output voltage is adjustable in the range of 75 to 105% of v o nom .the circuit works for single- and double-output models in a different way. for output voltages v o > v o nom , the minimum input voltage v i min (see electrical input data ) increases proportionally to v o / v o nom .
bcd20007-g rev ae, 14-may-2012 page 10 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters fig. 12 output voltage adjust for single-output models single-output models with r-input: the r-input (pin 13) is referenced to the secondary side of the converter. adjustment of the output voltage is possible by means of either an external resistor or a voltage source. trim vo1+ vo2? + v ext ? vi+ vi? r ext vo1? vo2+ 06089a control circuit v ref 2.5 v fig. 13 output voltage adjust for double-output models double-output models with trim input: the trim input (pin 4) of double-output models is referenced to the primary side. the figure 15 shows the circuitry. adjustment of the output voltage is possible in the range of 100 to 105% of v o nom using an external resistor, or in the range of 75 to 105% of v o nom using an external voltage source. a) adjustment by means of an external resistor r ext . programming of the output voltage by means of an external resistor r ext1 is possible within a limited range of b) adjustment by means of an external voltage source v ext . for external output voltages in the range of 75 to 105% of v o nom a voltage source v ext (0 to 20 v) is required, connected to the trim-input (pin 4) and vi?. the table below indicates typical v o versus v ext values under nominal conditions ( v i nom , i o = 0.5 i o nom ), with paralleled outputs or equal load conditions on each output. direct paralleling of the trim-inputs of converters connected in parallel is feasible. 100 to 105% v o nom . r ext should be connected between pin 4 and vi ?. the following table indicates suitable resistor values for typical output voltages under nominal conditions ( v i nom , i o = 0.5 i o nom ), with paralleled outputs or equal load conditions on each output. caution: connection of r ext to vi+ may damage the converter. r vo+ vo? + v ex t ? 4 k? v ref = 2.5 v control logic r ext1 r ext 2 06029e vi? vi+ + a) adjustment by means of an external resistor: depending upon the value of the required output voltage, a resistor r ext1 or r ext2 shall be connected as shown in the figure below: either: r ext1 between the r pin and vo? to achieve an output voltage adjustment range of v o = 75 to 100% of v o nom (85 to 100% for 3.3 v outputs): v o r ext1 4 k ? ????????? v o nom ? v o or: r ext2 between the r pin and vo+ to achieve an output voltage range of approximately v o = 100 to 105 % of v o nom : ( v o ? 2.5 v) r ext2 4 k ? ?????????????????? 2.5 v ( v o / v o nom ? 1) b) adjustment by means of an external voltage v ext between vo? and r pin. the control voltage is 1.96 to 2.62 v and allows for adjustment in the range of 75 to 105% of v o nom . v o 2.5 v v ext ???????? v o nom caution: applying an external voltage >2.75 v may damage the converter. note: attempting to adjust the output below this range will cause the converter to shut down (hiccup mode). table 6: r ext for v o > v o nom approximate values (v i nom , i o1 = i o2 = 0.5 i o1/2 nom ) v o [% v o nom ] r ext [k ?? ?? ? ] 105 to 108 (107 typically) 0 105 1.5 104 5.6 103 12 102 27 101 68 100 note: applying a control voltage greater than 20 v will set the converter into a hiccup mode. table 7: v ext for v o = 75 to 105% v o nom ; typical values (v i nom , i o1 = i o2 = 0.5 i o1/2 nom ) v o [% v o nom ] v ext [v] 105 0 102 1.6 95 4.5 85 9 75 13
bcd20007-g rev ae, 14-may-2012 page 11 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters electromagnetic emissions 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 effective protection against high input transient voltages, fig. 14a 20imx7-15-15-8: typical conducted emissions (peak) at the input at v i nom and i o nom according to en 55011/22. output leads 0.1 m, twisted. external input capacitor (1 f ceramic + 100 f electrolytic cap) electromagnetic immunity table 8: immunity type tests phenomenon standard class coupling value waveform source test in perf- level mode 1 applied imped. procedure oper. crit. 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 5 discharges electromagnetic iec/en 3 6 antenna 10 v/m am 80% n.a. 80 ? 1000 mhz yes a field 2 3 3 v/m 3 1 khz env 50204 3 antenna 10 v/m pm, 50% duty n.a. 900 mhz yes a 2 3 3 v/m 3 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 3 3 2000 v p 3 5 khz repet. rate, 60 s negative transients with transients per 15 ms burst coupling mode duration, and 300 ms period surges iec/en 3 4 +i/?i 2000 v p 1.2/50 s 2 ? 5 pos. and 5 neg. yes b 61000-4-5 2 3 4 1000 v p 3 surges rf conducted iec/en 3 +i/?i 10 vac am modul. 80% 50 ? 0.15 to 80 mhz yes a immunity 61000-4-6 2 3 3 vac 1 khz 150 ? 1 i = input, o = output 2 performance criterion: a = normal operation, no deviation from specifications, b = temporary deviation from specs possible 3 valid for 24ims7 and 48ims7 4 external components required 5 r or trim pin open, i pin connected with vi? 6 corresponds to the railway standard en 50121-3-2:2000, table 9.1 pmm 8000 plus date: 5.9.07 time: 08:00 40imx7d24-con-p dbv 80 60 20 40 0 0.2 0.5 1 2 5 10 20 mhz en 55022 a 40imx7-24-24-8 peak name: 40_7_24 20imx7-15-15-8 peak pmm 8000 plus name: 20_7_15 date: 5.9.07 time: 08:18 20imx7d15-con-p dbv 80 60 20 40 0 0.2 0.5 1 2 5 10 20 mhz en 55022 a fig. 14b 40imx7-24-24-8: typical conducted emissions (peak) at the input at v i nom and i o nom according to en 55011/22. output leads 0.1 m, twisted. external input capacitor (1 f ceramic + 47 f electrolytic cap)
bcd20007-g rev ae, 14-may-2012 page 12 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters pmm 8000 plus date: 5.9.07 time: 08:00 110imx7-05-con-p dbv 80 60 20 40 0 110imx7-05-8 peak name: 110_7_05 0.2 0.5 1 2 5 10 20 mhz en 55022 a immunity to environmental conditions table 9: mechanical and climatic stress test method standard t est conditions status cab 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% (3 0 c) converter (sodium chloride du ration: 2 h per cycle not nacl solution) s torage: 40 c, 93% rel. humidity operating storage duration: 22 h per cycle number of cycles: 3 table 10: temperature specifications, valid for air pressure of 800 to 1200 hpa (800 to 1200 mbar) temperature -9 -8 unit characteristics conditions min max min max t a ambient temperature operational 1 ?40 71 ?40 85 c t c case temperature ?40 95 ?40 105 t s storage temperature non operational ?55 100 ?55 105 1 see thermal considerations temperatures 1 covers also en 50155/en 61373 category 1, class b, body mounted (= chassis of coach) fig. 15 48ims7-15-15-8: typical conducted emissions (peak) at the input at v i nom and i o nom according to en 55011/22. output leads 0.1 m, twisted. external input capacitor (1 f ceramic + 47 f electrolytic cap). pmm 8000 plus date: 5.9.07 time: 09:10 dbv 80 60 20 40 0 48ims7-15-15-8 peak name: 48_7_15 0.2 0.5 1 2 5 10 20 mhz en 55022 a fig. 14c 110imx7-05-8: typical conducted emissions (peak) at the input at v i nom and i o nom according to en 55011/22. output leads 0.1 m, twisted. external input capacitor (0.15 f ceramic + 4.7 f electrolytic cap).
bcd20007-g rev ae, 14-may-2012 page 13 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters 50.8 (2") 3.81(0.15") 3.81(0.15") 3.81(0.15") 5 3.81 (0.15") 20.3 (0.8") 3 5.08 (0.2") pt 2.2 self tapping screws 1 4 10 14 0.8 1.2 (0.03 0.05") pins ? 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") s09030b measuring point of case temperature t c mechanical data dimensions in mm (inches). tolerances 0.3 mm, unless otherwise noted. weight: <20 g fig. 16 case imx7/ims7 with standard pinout european projection failure rates safety and installation instructions pin allocation fig. 19 footprint bottom view 1 4 10 14 10011 2 3 11 12 13 table 12: pin allocation pin single output double output 1 vi+ vi+ 2 vi? vi? 3i i 4 n.c. trim 10 vo? vo1? 11 vo+ vo1+ 12 vo? vo2? 13 r vo2+ 14 n.c. n.c. fig. 18 open-frame model (option z) fig. 17 smd pins (option m) table 11: mtbf and device hours model standard groun d benign ground fixed ground mobile unit t c = 40 c t c = 40 c t c = 70 c t c = 50 c 24ims7-05-9 mil-hdbk-217f 634 000 321 000 188 000 271 000 h 40imx7-12-12-8 mil-hdbk-217f 851 000 395 000 253 000 342 000 bellcore 3 019 000 1 510 000 809 000 409 000 40imx7-05-05-8 bellcore 3 320 000 1 660 000 871 000 447 000 43.2 (1.7") s90002b 48 (1.9") 1.27 (0.05") 23 (0.9") 5 x 3.81 (0.15") 8.25 (0.32") 3 x 5.08 (0.2") 1 4 10 14 3.5 0.1 (0.14") 1.2 (0.5") bottom view t c z core 50.8 3.81 3.81 3.81 3.81 3.81 5.08 5.08 5.08 3.81 1 4 10 14 0.8 1.2 pins 25.4 4.2 0.8 11.0 42.4 09031a measuring point case temper. t c bottom view
bcd20007-g rev ae, 14-may-2012 page 14 of 14 www.power-one.com ? imx7, ims7 series data sheet 7-watt dc-dc converters standards and approvals the converters are approved according to ul/csa 60950-1 and iec 60950 -1 2 nd edition. the converters have been evaluated for: building-in basic insulation input to output, based on their maximum 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 20imx7, 24ims7, 40imx7, 48ims7 - 2000 v for 70imx7 - 2500 v for 110imx7. the converters are subject to manufacturing surveillance in accordance with the above mentioned standards. railway applications to comply with railway standards, all components are coated 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 wr itten consent of the respective divisional president of power-one, inc. technical revisions - the appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. specifications are subject to change without notice. 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 liquids iin order to avoid possible damage, any penetration of cleaning fluids should be prevented, since the power supplies are not hermetical sealed. however, open-frame models (option z) leave the factory unlacquered; they may be lacquered by the customer, for instance together with the mother board. cleaning agents are not permitted ? except washing at room temperature with isopropyl alcohol. if necessary, the mother board must be cleaned, before fitting the open-frame converter. note: cleaning liquids may damage the adhesive joints of the ferrite cores. isolation the electric strength test is performed in the factory as a 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. installation instruction installation of the 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 conditions. to prevent excessive current flowing through the input lines in case of a short-circuit, an external fuse specified in section input fuse and reverse polarity protection should be installed in the non-earthed input supply line. description of options option m: smd pins this option allows surface mounting of the converters. option z: open frame for applications, where the protection by a housing is not table 12: electric strength test voltages characteristic i nput to output o/o 1 unit 20/40imx 70imx 110imx 24/48ims factory test >1 s 1.2 1.5 2.0 0.1 kvac equivalent dc volt. 1.5 2.0 2.5 0.15 kvdc coupling 1.2 1.2 1.2 - nf capacitance insulation resist. >100 >100 >100 - m ? at 500 vdc 1 between the outputs of double-output models necessary or in the case that the motherboard should be lacquered after fitting the converter; see cleaning liquids. option g: rohs-6 converters with a type designation ending by g are rohs- compliant for all six substances.

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