board mountable dc-dc converters imp 3 series edition 4/04.2001 1/6 3 watt dc-dc converters imp 3 series ixp 3 series input voltage range up to 4:1 high efficiency up to 75% short-circuit proof no derating dil 24 plastic package low cost type survey and key data table 1: type survey output 1 output 2 output power input voltage effic. 1 type designation type designation options 2 u o nom i o nom u o nom i o nom t a = 71 c u i min i/o electric strength i/o electric strength [v] [ma] [v] [ma] p o max [w] [v dc] [%] test 1500 v dc test 3500 v dc 5 500 - - 2.5 9...36 67 24 imp 3-05-7 24 ixp 3-05-7 s 5 500 - - 2.5 18...72 68 48 imp 3-05-7 48 ixp 3-05-7 s 12 250 - - 3 9...36 68 24 imp 3-12-7 24 ixp 3-12-7 s 12 250 - - 3 18...72 73 48 imp 3-12-7 48 ixp 3-12-7 s 15 200 - - 3 9...36 68 24 imp 3-15-7 24 ixp 3-15-7 s 15 200 - - 3 18...72 73 48 imp 3-15-7 48 ixp 3-15-7 s 5 250 5 250 2.5 9...36 66 24 imp 3-05-05-7 24 ixp 3-05-05-7 - 5 250 5 250 2.5 18...72 72 48 imp 3-05-05-7 48 ixp 3-05-05-7 - +5 250 ? 250 2.5 9...36 66 24 imp 3-0505-7 24 ixp 3-0505-7 s +5 250 ? 250 2.5 18...72 72 48 imp 3-0505-7 48 ixp 3-0505-7 s 12 125 12 125 3 9...36 68 24 imp 3-12-12-7 24 ixp 3-12-12-7 - 12 125 12 125 3 18...72 72 48 imp 3-12-12-7 48 ixp 3-12-12-7 - +12 125 ?2 125 3 9...36 68 24 imp 3-1212-7 24 ixp 3-1212-7 s +12 125 ?2 125 3 18...72 72 48 imp 3-1212-7 48 ixp 3-1212-7 s 15 100 15 100 3 9...36 68 24 imp 3-15-15-7 24 ixp 3-15-15-7 - 15 100 15 100 3 18...72 75 48 imp 3-15-15-7 48 ixp 3-15-15-7 - +15 100 ?5 100 3 9...36 68 24 imp 3-1515-7 24 ixp 3-1515-7 s +15 100 ?5 100 3 18...72 75 48 imp 3-1515-7 48 ixp 3-1515-7 s 1 efficiency at u i nom and i o nom . 2 option: standard pin-out (industrial) summary the imp 3 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, featuring short-circuit protection and input to output isolation. with a good efficiency as well as good dynamic response to load changes and at start-up, the imp 3 series is the best solution for applications where high reliability and high performance for a low price is re- quired. table of contents page summary .......................................................................... 1 type survey and key data .............................................. 1 type key .......................................................................... 2 functional description ...................................................... 2 electrical input data ......................................................... 3 electrical output data ...................................................... 3 page auxiliary function ............................................................. 4 electromagnetic compatibility (emc) .............................. 5 immunity to environmental conditions ............................. 5 mechanical data .............................................................. 5 safety and installation instructions .................................. 6 20 0.79" 32 1.26" 12 0.47" input voltage range up to 72 v dc 1 or 2 outputs up to 30 v dc 1500 v dc i/o electric strength test voltage
board mountable dc-dc converters imp 3 series edition 4/04.2001 2/6 type key type key 24 imp 3 - 12 12 -7 s nominal input voltage in volt .................................... 24, 48 serie ..................................................................... imp, ixp nominal output power in watt ........................................... 3 nominal output voltage for output 1 in volt .............. 05...15 nominal output voltage for output 2 in volt .............. 05...15 operating ambient temperature range t a 25...71 c .................................................. -7 option: industry standard pinout .............................. s fig. 1 single output converter block diagram with alternative pinout fig. 2 dual output converter block diagram with alternative pinout vo+ ref. control 1 2 23 13 24 12 20 vo vi vi+ sd 03029 com vo+ ref. control 1 2 23 15 11 24 10 13 20 vo vi vi+ sd 03030 go2 vo2 ref. control 1 2 23 13 12 24 16 9 20 go1 vi vi+ sd vo1 03031 functional description fig. 3 double output converter block diagram vo+ ref. control 22 23 2 14 3 16 vo vi vi+ 03032 fig. 4 single output converter block diagram with industry stand- ard pinout (option s) com vo+ ref. control 22 23 2 14 16 3 9 11 vo vi vi+ 03033 fig. 5 dual output converter block diagram with industry stand- ard pinout (option s)
board mountable dc-dc converters imp 3 series edition 4/04.2001 3/6 electrical input data general condition: t a = 25 c unless otherwise specified table 2: input data input 24 imp/ixp 3 48 imp/ixp 3 characteristics conditions min typ max min typ max unit u i operating input voltage t a min ... t a max , i o = 0... i o nom 9361872v dc u i nom nominal input voltage 24 48 u i abs input voltage without 0 40 0 75 damage i i 0 no load input current u i nom , i o = 0 12 8 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 u sd shut down voltage operating open or 8...10 open or 8...10 v dc not operating 0.3...2 0.3...2 i sd shut down current operating 1...5 1...5 a not operating 25... 45 25... 45 electrical output data general condition: t a = 25 c unless otherwise specified table 3a: output data for single output types output .. imp/ixp 3-05 .. imp/ixp 3-12 .. imp/ixp 3-15 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 5.10 11.76 12 12.24 14.70 15 15.30 v i o nom nominal output current: 500 250 200 ma 24 imp 3 u i = 9...11 v dc 400 200 150 48 imp 3 u i = 18...21 v dc 400 200 150 u o output voltage noise u i nom 100 100 100 mv pp (bw = 20 mhz) (0.2...1) i o nom d u o u static line regulation u i min ... u i max , i o nom 1 1 1% d u o i static load regulation u i nom , (0...1) i o nom 2 2 2 a uo temperature coefficient u i nom , i o nom 0.02 0.02 0.02 %/k f s switching frequency 50 50 50 khz table 3b: output data for dual output types output .. imp/ixp 3-0505 .. imp/ixp 3-1212 .. imp/ixp 3-1515 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 5.10 11.76 12 12.24 14.70 15 15.30 v i o nom nominal output current: 250 125 100 ma 24 imp 3 u i = 9...11 v dc 200 100 80 48 imp 3 u i = 18...21 v dc 200 100 80 u o output voltage noise 1 u i min ... u i max 150 300 150 300 150 300 mv pp (bw = 20 mhz) (0.2...1) i o nom d u o u static line regulation u i min ... u i max , i o nom 1 1 1% d u o i static load regulation u i nom 3 3 3 (0.2...1) i o nom a uo temperature coefficient u i nom , i o nom 0.02 0.02 0.02 %/k f s switching frequency 50 50 50 khz 1 output voltage noise with option s (standard pin-out) = 300 mv pp
board mountable dc-dc converters imp 3 series edition 4/04.2001 4/6 table 3c: output data for double output types output .. imp/ixp 3-05-05 .. imp/ixp 3-12-12 .. imp/ixp 3-15-15 characteristics conditions min typ max min typ max min typ max unit u o nom output voltage u i nom , i o nom 2 52 12 2 15 v u o 2 4.90 2 5.10 2 11.76 2 12.24 2 14.70 2 15.30 i o nom nominal output current: 2 250 2 125 2 100 ma 24 imp 3 u i = 9...11 v dc 2 200 2 100 2 80 48 imp 3 u i = 18...21 v dc 2 200 2 100 2 80 u o output voltage noise u i min ... u i max 150 150 150 mv pp (bw = 20 mhz) (0.2...1) i o nom d u o u static line regulation u i min ... u i max , i o nom 1 1 1% d u o i static load regulation u i nom , (0.2...1) i o nom 3 3 3 a uo temperature coefficient u i nom , i o nom 0.02 0.02 0.02 %/k f s switching frequency 50 50 50 khz connection in parallel connecting the outputs of two or more converters in paral- lel is not recommended due to uneven power distribution among the outputs. protection scheme the imp 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 imp 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. auxiliary function sd-input the output voltage is turned on if the pin 20 is open or a voltage of 8...10 v dc is applied. if the voltage at pin 20 is between 0.3 and 2 v dc, the output voltage is turned off. the maximum voltage without damage is limited to 20 v and the maximum allowed current is limited to 3 ma. 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 imp 3 series edition 4/04.2001 5/6 fig. 6 input filter arrangement c 1 c 2 l 1 vi+ vi c i 07025 table 4: input filter components input voltage c 1 c 2 type l 1 type c i type 24, 48 v dc 2.2 f 1 2.2 f 1 siemens 2.2 mh siemens 4.7 f al-chip 100 v 100 v b 32522 b 82722 100 v (low esr) c1225-k a2202-n1 1 only valid for input voltages up to 60 v dc. 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 three additional capacitors and one common mode ring core choke. the filter components should be placed as close as possi- ble to the input of the converter. immunity to environmental conditions thermal considerations table 5: temperature specifications, valid for air pressure of 800...1200 hpa (800...1200 mbar) temperature standard -7 characteristics conditions min max unit t a ambient temperature u i nom. 25 71 c t c case temperature i o = 0 ... i o nom. 25 90 t s storage temperature non operational 40 100 table 6: mtbf values at specified case temperature ground benign ground fixed ground mobile 40 c40 c70 c50 c mtbf according to mil-hdbk-217f, n2 3'759'000 h 715'000 h 275'000 h 289'000 h mechanical data dimensions in mm. tolerances 0.3 mm unless otherwise specified. european projection fig. 7 case: dil 24 weight: 16 g 15.24 min. 22.3 2.54 min. 33.8 31.8 1 0.5 min. 3 20.3 12 mounting space required 09034 measuring point of case temperature t c
board mountable dc-dc converters imp 3 series edition 4/04.2001 6/6 table 8: pin allocation alternative pinout pin single output dual output double output 1 vi+ vi+ vi+ 2 vi+ vi+ vi+ 9 go1 10 com 11 com 12 vo vo1 13 vo+ vo vo2 15 vo+ 16 go2 20 sd sd sd 23 vi vi vi 24 vi vi vi table 9: pin allocation industry standard pinout (option s) pin single output dual output 2vi vi 3vi vi 9 n.c. com 10 11 n.c. vo 14 vo+ vo+ 15 n.c. 16 vo com 22 vi+ vi+ 23 vi+ vi+ 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. 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 f1a for 24 imp 3 and 24 ixp 3 types and f0.5a for 48 imp 3 and 48 ixp 3 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. 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 (imp 3) or 4000 v (ixp 3). protection degree the protection degree of the dc-dc converters is ip 40. 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 7: electric strength test voltages, clearance and creepage distances characteristic input to output output to unit imp 3 ixp 3 output electric strength 1.1 2.5 0.35 kv rms test voltage 1 s 1.5 3.5 0.5 kv dc coupling capacitance 40 40 30 pf insulation resistance >1000 >1000 >100 m ? at 500 v dc
board mountable dc-dc converters imp 3 series edition 4/04.2001 7/6 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 . ac-dc front end dc-dc con- verter mains fuse battery earth connection suppressor diode selv earth connection + ~ ~ 10004 fig. 8 schematic safety concept. use fuse, suppressor diode and earth connection as per table: safety concept leading to an selv output circuit . table 10: 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 tnv-3 circuit circuit (only with ixp units) 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.
|
