board mountable dc-dc converters imr 6 series edition 5/5.2000 1/6 table of contents page summary .......................................................................... 1 type survey and key data .............................................. 1 type key .......................................................................... 2 functional description ...................................................... 2 electrical input data ......................................................... 2 page electrical output data ...................................................... 3 electromagnetic compatibility (emc) .............................. 4 immunity to environmental conditions ............................. 4 mechanical data .............................................................. 4 safety and installation instructions .................................. 5 51 2.0" 51 2.0" 12 0.47" 6 watt dc-dc converters imr 6-series input voltage range up to 3 :1 input filter high efficiency up to 75% outputs short-circuit proof no derating 2 2" plastic case low cost with standard battery voltages. the imr 6 converters fea- ture good efficiency and good dynamic response to load changes and at start-up. the imr 6 modules are short-cir- cuit and no-load proof. summary the imr 6 series of dc-dc converters have been devel- oped for powering commercial type of electronic circuits, e.g. telephone systems components, industrial controllers and small appliances. they are suitable for applications type survey and key data table 1: type survey output output power efficiency 1 input voltage range option u o nom i o nom t a = 71 c h min u i min ... u i max u i min ... u i max u i min ... u i max u i min ... u i max [v] [ma] p o nom [w] [%] 9...18 v dc 18...36 v dc 20...60 v dc 36...72 v dc 3.3 1500 5 63 12 imr 6-03-2 24 imr 6-03-2 40 imr 6-03-2 48 imr 6-03-2 -7 5 1000 5 63 12 imr 6-05-2 24 imr 6-05-2 40 imr 6-05-2 48 imr 6-05-2 12 500 6 68 12 imr 6-12-2 24 imr 6-12-2 40 imr 6-12-2 48 imr 6-12-2 15 400 6 68 12 imr 6-15-2 24 imr 6-15-2 40 imr 6-15-2 48 imr 6-15-2 5 500 5 67 12 imr 6-0505-2 24 imr 6-0505-2 40 imr 6-0505-2 48 imr 6-0505-2 12 250 6 70 12 imr 6-1212-2 24 imr 6-1212-2 40 imr 6-1212-2 48 imr 6-1212-2 15 200 6 70 12 imr 6-1515-2 24 imr 6-1515-2 40 imr 6-1515-2 48 imr 6-1515-2 1 effiency at u i nom and i o nom input voltage range up to 72 v dc 1 output up to 30 v dc 500 v dc i/o electric strengh test voltage
board mountable dc-dc converters imr 6 series edition 5/5.2000 2/6 table 2b: input data input 40 imr 6 48 imr 6 characteristics conditions min typ max min typ max unit u i input voltage range t a min ... t a max 20 60 36 72 v dc u i nom nominal input voltage i o = 0... i o nom 36 48 u i input voltage without 0 75 0 75 damage i i 0 no load input current u i nom , i o = 0 26 26 ma i i l input current limitation u i nom , full load 1.25 p i nom 1.25 p i nom w response u i rev reverse input voltage u i = negative or shunt diode shunt diode protection reverse polarity use external fuse use external fuse type key type key 24 imr 6 - 12 12 -2 nominal input voltage in volt ................................... 12...48 series .......................................................................... imr nominal output power in watt ........................................... 6 nominal output voltage for output 1 in volt .............. 05...15 nominal output voltage for output 2 in volt .............. 05...15 operational ambient temperature range t a ?0...50 c .................................................. -2 ?5...71 c .................................................. -7 vi+ vo vi vo+ control shunt diode, filter com 03035 ref. vi+ vo vi vo+ ref. control shunt diode, filter 03034 fig. 2: dual output converter block diagram fig. 1: single output converter block diagram functional description electrical input data general condition: t a = 25 c unless otherwise specified table 2a: input data input 12 imr 6 24 imr 6 characteristics conditions min typ max min typ max unit u i input voltage range t a min ... t a max 9181836v dc u i nom nominal input voltage i o = 0... i o nom 12 24 u i input voltage without 0 22 0 40 damage i i 0 no load input current u i nom , i o = 0 22 26 ma i i l input current limitation u i nom , full load 1.25 p i nom 1.25 p i nom w response u i rev reverse input voltage u i = negative or shunt diode shunt diode protection reverse polarity use external fuse use external fuse
board mountable dc-dc converters imr 6 series edition 5/5.2000 3/6 electrical output data general condition: t a = 25 c unless otherwise specified table 3a: output data for single output types output .. imr 6-03 .. imr 6-05 .. imr 6-12 .. imr 6-15 characteristics conditions min typ max min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 3.24 3.36 4.90 5.10 11.76 12.24 14.70 15.30 v i o nom nominal output current u i min ... u i max 1500 1000 500 400 ma u o output voltage noise u i nom 100 150 100 150 100 150 100 150 mv pp (0...1) i o nom (bw = 20 mhz) d u o u static line regulation u i min ... u i max 1 1 1 1% i o nom d u o i static load regulation u i nom 2 2 2 2 (0.2...1) i o nom a uo temperature coefficient u i nom 0.02 0.02 0.02 0.02 %/k f s switching frequency i o nom 50 50 50 50 khz table 3b: output data for dual output types output .. imr 6-0505 .. imr 6-1212 .. imr 6-1515 characteristics conditions min typ max min typ max min typ max unit u o output voltage u i nom , i o nom 4.90 5.10 11.76 12.24 14.70 15.30 v i o nom nominal output current u i min ... u i max 500 250 200 ma u o output voltage noise u i nom 100 150 100 150 100 150 mv pp (0.2...1) i o nom (bw = 20 mhz) d u o u static line regulation u i min ... u i max 1 1 1% i o nom d u o i static load regulation u i nom 5 5 5 (0.2...1) i o nom a uo temperature coefficient u i nom 0.02 0.02 0.02 %/k f s switching frequency i o nom 50 50 50 khz connection in parallel the outputs of several units can be connected in parallel. however, the use of a single unit with a higher power rating is a better choice because of uneven power distribution among the outputs connected in parallel. it is recom- mended to select converters to be connected in parallel with very small output voltage differences at full load (i.e. < 1%). a decoupling diode is not required but recom- mended. protection scheme the imr series is continuously short circuit protected by means of input power limitation. the unit will not be dam- aged if started up into a short circuit. after removal of the short circuit, it will resume normal operation. the imr series is also no-load proof, meaning that the regulation is still effective with no load and the output volt- age does not rise. however, due to component tolerances, oscillation could occur and ripple and noise can be outside of specified values. if the converter is used in senitive elec- tronic circuits with no-load conditions, it is recommended to pre-load the outputs with at least 20% of the specified nomi- nal load. thermal considerations if a converter is operated, the relationship between the am- bient temperature t a and the case temperature t c depends heavily on the conditions of operation and integration into a system. the thermal conditions are influenced by input volt- age, output current, airflow, temperature of surrounding components and surfaces and the properties of the printed circuit board. the specified maximum ambient temperature t a max is therefore only an indicative value and under practi- cal 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 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 the outputs of one or more units can be connected in se- ries. no suppressor diodes are required. power-one how- ever recommends to protect each individual output with a zener diode or preferably a suppressor diode, to avoid re- verse polarity that may occur if the output voltages do not rise simultaneously.
board mountable dc-dc converters imr 6 series edition 5/5.2000 4/6 12 min. 5 1 50.8 20.32 15.24 15.24 vo+ 50.8 5.08 22.86 10.2 10.2 vi vi+ vo 09035 measuring point of case temperature t c com fig. 5 case 2" 2" weight: 50 g mechanical data dimensions in mm. tolerances 0.3 mm unless otherwise specified. european projection immunity to environmental conditions table 5: temperature specifications, valid for air pressure of 800...1200 hpa (800...1200 mbar) temperature standard -2 option -7 characteristics conditions min max min max unit t a ambient temperature u i nom 10 50 25 71 c t c case temperature i o = 0... i o nom 10 80 25 80 t s storage temperature non operational 25 85 40 100 electromagnetic compatibility (emc) filter recommendations for compliance with cispr 22/en 55022, class b electromagnetic emission requirements according to en 55022, class b can be easely achieved by adding an exter- nal input filter consisting of additional capacitors and a choke. the filter components should be placed as close as possi- ble to the input of the converter. table 4: input filter components input voltage c 1 c 2 type l 1 type c i type 12, 24, 40, 48 v dc 2.2 f 2.2 f siemens 2.2 mh siemens 2.2 f siemens 100 v 100 v b 32522- b 82722- 100 v b 32522- c1225-k a2202-n1 c1225-k c 1 c 2 l 1 vi+ vi c i 07028 fig. 3 input filter arrangement for 12, 24 and 40 v dc types table 6: mtbf mtbf ground benign ground fixed ground mobile mtbf according to mil-hdbk-217f, n2 40 c40 c50 c 3'332'000 h 647'200 h 244'600 h
board mountable dc-dc converters imr 6 series edition 5/5.2000 5/6 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. 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. standards and approvals the units have been evaluated for: building in operational insulation input to output 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. 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. 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 f3.15a for 12 imr 6 types, f1.6a for 24 imr 6, f0.8a for 40 imr 6 and 48 imr 6 types. cleaning agents in order to avoid possible damage, any penetration of cleaning fluids is to be prevented, since the power supplies are not hermetically sealed. protection degree the protection degree of the dc-dc converters is ip 40. table 7: electric strength test voltages, clearance and creepage distances characteristic input to output unit electric strength 350 v rms test voltage 1 s 500 v dc coupling capacitance 320 pf isulation resistance >1000 m ? at 500 v dc
board mountable dc-dc converters imr 6 series edition 5/5.2000 6/6 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 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 30 v. however, it is the sole responsibility of the installer to as- sure the compliance with the relevant and applicable safety regulations. more information is given in: technical infor- mation: safety . table 8: 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 diodes 4 , and earthed circuit secondary circuit output circuit 2 double or reinforced 60 v selv circuit operational insulation, pro- selv circuit vided by the dc-dc converter >60 v tnv-2 circuit earthed output circuit 2 earthed selv double or reinforced insu- input fuse 3 and output selv circuit lated unearthed hazardous suppressor diodes 4 voltage secondary circuit 5 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 conductor 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 double or reinforced insulation according to the relevant safety standard, based on the maxim um output voltage from the front end. ac-dc front end dc-dc con- verter mains fuse battery earth connection suppressor diode selv earth connection + ~ ~ 10004 fig. 6 schematic safety concept. use fuse, suppressor diode and earth connection as per table: safety concept leading to an selv output circuit .
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