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psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 1 of 13 table of contents page summary .......................................................................... 1 model selection and key data ......................................... 1 part number description ................................................. 2 functional description ..................................................... 2 electrical input data ......................................................... 3 electrical output data ...................................................... 4 auxiliary functions ........................................................... 6 page electromagnetic compatibility (emc) .............................. 7 immunity to environmental conditions ............................ 8 mechanical data .............................................................. 9 safety and installation instructions ................................ 10 description of options ................................................... 11 accessorie s ................................................................... 12 ec-declaration of conformity ........................................ 13 model selection and key data table 1: type survey output output input input efficiency 2 type options superseded voltage current voltage range voltage designation old type v o nom [v] i o nom [a] v i [v] 1 v i nom [v] h min [%] h typ [%] (phased-out) 5.1 12 7 - 40 20 82 83 psc 5a12-7ir -9, l, p, c, d psr 512-7 5.1 10 8 - 80 40 76 79 psc 5a10-7ir psr 510-7 12 8 15 - 80 40 88 89 psc 128-7ir psr 128-7 15 8 19 - 80 40 90 91 psc 158-7ir psr 158-7 24 8 29 - 80 50 93 94 psc 248-7ir psr 248-7 36 8 42 - 80 60 95 96 psc 368-7ir psr 368-7 1 see: electrical input data: d v io min (min. differential voltage v i ? v o ). 2 efficiency at v i nom and i o nom . summary the psc series of positive switching regulators is designed as power supply modules for electronic systems. their ma- jor advantages include a high level of efficiency that re- mains virtually constant over the entire input voltage range, high reliability, low ripple and excellent dynamic response. modules with input voltages up to 80 v are specially de- signed for secondary switched and battery driven applica- tions. the case design allows operation at nominal load up to 71c without additional cooling. non standard input/output configurations or special custom adaptions are available on request. input voltage up to 80 vdc single output of 5.1 - 36 vdc no input to output isolation ? high efficiency up to 96% wide input voltage range low input to output differential voltage very good dynamic properties input undervoltage lock-out external output voltage adjustment and inhibit two temperature ranges continuous no-load and short-circuit proof no derating safety according to iec/en 60950 151 5.9" 88 3.5" 32 1.3" www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 2 of 13 part number description psc 12 8 -7 l i r p c d positive switching regulator in case c03 .................... psc nominal output voltage in volt (5a for 5.1 v) ......... 5a - 36 nominal output current in ampere ............................ 8 - 12 operational ambient temperature range t a ?25 to 71c ......................................................... -7 ?40 to 71c (option) ............................................ -9 input filter (option) ............................................................ l inhibit input ....................................................................... i control input for output voltage adjustment 1 .................. r potentiometer 1 (option) ................................................... p thyristor crowbar (option) ............................................... c input/output voltage monitor (option) ......................... d/d1 1 feature r excludes option p and vice versa. example: psc 128-7lipc = a positive switching regulator with a 12 v, 8 a output, ambient temperature range of ?25 to 71c, input filter, inhibit input, output adjust potentiometer and thyristor crowbar. control circuit option p go? vo+ gi? vi+ input filter option l g r i d (option) i o v o i i v i option c fuse 1 03018 option d v t v o 1 fuse fitted for option fig. 1 block diagram functional description the switching regulators are designed using the buck con- verter topology. see also: technical information: topolo- gies . the input is not electrically isolated from the output. during the on period of the switching transistor, current is transferred to the output and energy is stored in the output choke in the form of flux. during the off period, this energy forces the current to continue flowing through the output, to the load and back through the freewheeling diode. regula- tion is accomplished by varying the on to off duty ratio of the power switch. these regulators are ideal for a wide range of applications, where input to output isolation is not necessary, or where already provided by an external front end (e.g. a trans- former with rectifier). to optimise customer?s needs, addi- tional options and accessories are available. www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 3 of 13 electrical input data general conditions: t a = 25c, unless t c is specified table 2a: input data input psc 5a12 psc 5a10 psc 128 characteristics conditions min typ max min typ max min typ max unit v i operating input voltage i o = 0 - i o nom 7 40 8 80 15 80 vdc d v io min min. diff. voltage v i ? v o 1 t c min - t c max 1.9 2.9 3 v i o undervoltage lock-out 6.3 7.3 7.3 i i 0 no load input current i o = 0, v i min - v i max 45 40 35 ma i inr p peak value of inrush current v i nom 150 250 250 a t inr r rise time without option l 555 s t inr h time to half-value 40 40 40 i inr p peak value of inrush current v i nom 250 350 350 a t inr r rise time with option l 25 25 25 s t inr h time to half-value 125 125 125 u i rfi input rfi level, en 55011/22 v i nom , i o nom bbb 0.15 - 30 mhz with option l 2 table 2b: input data input psc 158 psc 248 psc 368 characteristics conditions min typ max min typ max min typ max unit v i operating input voltage i o = 0 - i o nom 19 80 29 80 42 80 vdc d v io min min. diff. voltage v i ? v o 1 t c min - t c max 456 1 v i o undervoltage lock-out 7.3 12 19 i i 0 no load input current i o = 0, v i min - v i max 35 35 40 ma i inr p peak value of inrush current v i nom 250 250 250 a t inr r rise time without option l 555 s t inr h time to half-value 40 40 40 i inr p peak value of inrush current v i nom 350 350 350 a t inr r rise time with option l 25 25 25 s t inr h time to half-value 125 125 125 u i rfi input rfi level, en 55011/22 v i nom , i o nom bbb 0.15 - 30 mhz with option l 2 1 the minimum differential voltage d v io min between input and output increases linearly by 0 to 1 v between t a = 46c and 71c ( t c = 70c and 95c) 2 with additional external input capacitor c e = 120 f/100 v (e.g. nichicon pf series, or equivalent). external input circuitry the sum of the lengths of the supply lines to the source or to the nearest capacitor 100 f (a + b) should not exceed 5 m unless option l is fitted. this option is recommended in order to prevent power line oscillations and reduce super- imposed interference voltages. see also: technical infor- mation: application notes . vi+ gi? vo+ go? a b + 04016 fig. 2 switching regulator with long supply lines. www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 4 of 13 electrical output data general conditions: ? t a = 25c, unless t c is specified ? with r or option p, output voltage v o = v o nom at i o nom table 3a: output data output psc 5a12 psc 5a10 psc 128 characteristics conditions min typ max min typ max min typ max unit v o output voltage v i nom , i o nom 5.07 5.13 5.07 5.13 11.93 12.07 v i o output current 1 v i min - v i max 0 12.0 0 10.0 0 8.0 a i ol output current limitation t c min - t c max 12.0 15.6 10.0 13.0 8.0 10.4 response u o output switching freq. v i nom , i o nom 25 30 25 30 50 90 mv pp voltage total iec/en 61204 2 29 34 29 34 54 94 noise bw = 20 mhz d v o u static line regulation v i min - v i max , i o nom 30 45 30 45 50 75 mv d v o l static load regulation v i nom , i o = 0 - i o nom 20 25 20 25 30 35 u o d dynamic voltage deviat. v i nom 130 130 130 t d load recovery time i o nom ? 1 / 3 i o nom 40 50 60 s regulation iec/en 61204 2 a uo temperature coefficient v i min - v i max 1 1 2 mv/k d v o / d t c ( t c min - t c max ) i o = 0 - i o nom 0.02 0.02 0.02 %/k table 3b: output data output psc 158 psc 248 psc 368 characteristics conditions min typ max min typ max min typ max unit v o output voltage v i nom , i o nom 14.91 15.09 23.86 24.14 35.78 36.22 v i o output current 1 v i min - v i max 0 8.0 0 8.0 0 8.0 a i ol output current limitation t c min - t c max 8.0 10.4 8.0 10.4 8.0 10.4 response u o output switching freq. v i nom , i o nom 50 90 55 150 80 190 mv pp voltage total iec/en 61204 2 54 94 60 155 85 195 noise bw = 20 mhz d v o u static line regulation v i min - v i max , i o nom 70 100 150 220 200 270 mv d v o l static load regulation v i nom , i o = 0 - i o nom 30 45 120 160 125 160 u o d dynamic voltage deviat. v i nom 130 150 220 t d load recovery time i o nom ? 1 / 3 i o nom 60 80 100 s regulation iec/en 61204 2 a uo temperature coefficient v i min - v i max 3 5 8 mv/k d v o / d t c ( t c min - t c max ) i o = 0 - i o nom 0.02 0.02 0.02 %/k 1 see also: thermal considerations. 2 see: technical information: measuring and testing . www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 5 of 13 thermal considerations when a switching regulator is located in free, quasi-station- ary air (convection cooling) at a temperature t a = 71c and is operated at its nominal output current i o nom , the case temperature t c will be about 95c after the warm-up phase, measured at the measuring point of case tempera- ture t c (see: mechanical data ). under practical operating conditions, the ambient tempera- ture t a may exceed 71c, provided additional measures (heat sink, fan, etc.) are taken to ensure that the case tem- perature t c does not exceed its maximum value of 95c. example: sufficient forced cooling allows t a max = 85c. a simple check of the case temperature t c ( t c 95c) at full load ensures correct operation of the system. 1.2 1.0 0.8 0.6 0.4 0 0.2 0.4 1.0 1.2 0.2 0.6 0.8 1.4 v o / v o nom i o / i o nom i o no m i o l 05033 fig. 5 overload, short-circuit behaviour v o versus i o . 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 50 60 70 80 90 100 i o / i o nom t a [?c] 0.9 1.0 forced cooling 05031 t a min t c max convection cooling parallel and series connection outputs of equal nominal voltages can be parallel-con- nected. however, the use of a single unit with higher output power, because of its power dissipation, is always a better solution. in parallel-connected operation, one or several outputs may operate continuously at their current limit knee-point which will cause an increase of the heat generation. conse- quently, the max. ambient temperature value should be re- duced by 10 k. outputs can be series-connected with any other module. in series-connection the maximum output current is limited by the lowest current limitation. electrically separated source voltages are needed for each module! short circuit behaviour a constant current limitation circuit holds the output current almost constant whenever an overload or a short circuit is applied to the regulator's output. it acts self-protecting and recovers ? in contrary to the fold back method ? automati- cally after removal of the overload or short circuit condition. fig. 4 output current derating versus temperature output protection a voltage suppressor diode which in worst case conditions fails into a short circuit (or a thyristor crowbar, option c) protects the output against an internally generated over- voltage. such an overvoltage could occur due to a failure of either the control circuit or the switching transistor. the out- put protection is not designed to withstand externally ap- plied overvoltages. the user should ensure that systems with power-one power supplies, in the event of a failure, do not result in an unsafe condition (fail-safe). fig. 3 dynamic load regulation. i o / i o nom 1 v od v od t d t d d v o i d v o i t v o 0 t 10 s 10 s 05010 www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 6 of 13 0 t t 0 inhibit 1 0.1 1 v o / v o nom t r t f 06001 fig. 8 output response as a function of inhibit signal auxiliary functions i inhibit for remote on and off note: with open i-input, output is enabled ( v o = on) the inhibit input allows the switching regulator output to be disabled via a control signal. in systems with several units, this feature can be used, for example, to control the activa- tion sequence of the regulators by a logic signal (ttl, c- mos, etc.). an output voltage overshoot will not occur when switching on or off. vi+ gi? go? i vo+ i inh v inh 06009 fig. 7 definition of i inh and v inh fig. 6 typical inhibit current i inh versus inhibit voltage v inh 4 2 0 ?50 ?40 20 40 ?30 0 ?20 ?10 10 30 50 5 3 1 i inh [ma] v inh [v] v o on v o off v inh = 0.8 v v inh = 2.4 v 06034 table 4: inhibit characteristics characteristics conditions min typ max unit v inh inhibit input voltage to keep v o = on v i min - v i max ?50 +0.8 vdc regulator output voltage - v o = off t c min - t c max +2.4 +50 t r switch-on time after inhibit command v i = v i nom 5ms t f switch-off time after inhibit command r l = v o nom / i o nom 10 i i inh input current when inhibited v i = v i nom 10 ma vo+ r ? + g 4000 ? v ref r 1 r 2 06036 r control for output voltage adjustment note: with open r input, v o v o nom . r excludes option p. (for superseded psr types v o 1.08 v o nom ) the output voltage v o can either be adjusted with an exter- nal voltage ( v ext ) or with an external resistor ( r 1 or r 2 ). the adjustment range is 0 - 108% of v o nom . the minimum differ- ential voltage d v io min between input and output (see: elec- trical input data ) should be maintained. undervoltage lock- out = minimum input voltage. fig. 9 voltage adjustment with v ext between r and g (go-) vo+ r + 4000 ? g v ref v ext ? + 06035 caution: to prevent damage v ext should not exceed 20 v, nor be negative and r 2 should never be less than 47 k ? . a) v o = 0 - 108% v o nom , using v ext between r and g (go?) v o v ext v ext 2.5 v ????? v o v o nom ????? v o nom 2.5 v fig. 10 voltage adjustment with external resistor r 1 or r 2 www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 7 of 13 electromagnetic compatibility (emc) electromagnetic immunity general condition: case not earthed. table 5: immunity type tests phenomenon standard 1 class coupling value waveform source test in per- level mode 2 applied imped. procedure oper. form. 3 1 mhz burst iec iii i/o, i/c, o/c 2500 v p 400 damped 200 ? 2 s per yes a 5 disturbance 60255-22-1 +i/?i, +o/?o 1000 v p 1 mhz waves/s coupling mode voltage surge iec 60571-1 i/c, +i/?i 800 v p 100 s 100 ? yes b 1500 v p 50 s 1 pos. and 1 neg. voltage surge per coupling mode 3000 v p 5 s 4000 v p 1 s 7000 v p 100 ns electrostatic iec/en 3 contact discharge 6000 v p 1/50 ns 330 ? 10 positive and yes a 4 discharge 61000-4-2 to case 10 negative discharges electromagnetic iec/en 2 antenna 3 v/m am 80% 80 - 1000 mhz yes a field 61000-4-3 1 khz electrical fast iec/en 3 i/c, +i/?i 2000 v p bursts of 5/50 ns 50 ? 60 s positive yes a 4 5 transie nts/burst 61000-4-4 4 4000 v p 5 khz rep. rate 60 s negative b 4 5 transients with bursts per 15 ms burst coupling mode duration and a 300 ms period surge iec/en 3 i/c 2000 v p 1.2/50 s 12 ? 5 pos. and 5 neg. yes b 4 5 61000-4-5 +i/?i 1000 v p 2 ? surges per coupling mode conducted iec/en 3 i, o, signal wires 140 db v am 80% 150 ? 0.15 - 80 mhz yes a disturbances 61000-4-6 (10 vac) 1 khz 1 for related and previous standards see: technical information: safety & emc . 2 i = input, o = output, c = case. 3 a = normal operation, no deviation from specifications, b = normal operation, temporary deviation from specs possible. 4 option l neccessary. 5 with option c, manual reset might be necessary. b) v o = 0 - 100% v o nom , using r 1 between r and g (go-): 4000 ? v o v o nom r 1 r 1 ??????????? v o ??????????? v o nom ? v o r 1 + 4000 ? c) v o = v o nom - v o max , using r 2 between r and vo+: v o max = v o nom + 8% 4000 ? v o ( v o nom ? 2.5 v) r 2 ???????????????????????? 2.5 v ( v o ? v o nom ) v o nom 2.5 v r 2 v o ???????????????????????????????? 2.5 v ( r 2 + 4000 ? ) ? v o nom 4000 ? led output voltage indicator a yellow output indicator led shines when the output volt- age is higher than approx. 3 v. www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 8 of 13 immunity to environmental conditions table 6: mechanical stress test method standard t est conditions status ca damp heat iec/din 60068-2-3 temper ature: 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 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 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 60068-2-6 acceleration amplitude: 0.35 mm (10 - 60 hz) unit (sinusoidal) mil-std-810d section 514.3 5 g n = 49 m/s 2 (60 - 2000 hz) operating frequency (1 oct/min): 10 - 2000 hz test duration: 7.5 h (2.5 h each axis) fda random vibration iec 60068-2-35 acceleration spectral density: 0.05 g 2 /hz unit wide band din 40046 part 23 frequency band: 20 - 500 hz operating reproducibility acceleration magnitude: 4.9 g rms high test duration: 3 h (1 h each axis) kb salt mist, cyclic iec/en/din 60068-2-52 concentration: 5% (30c) unit not (sodium chloride duration: 2 h per cycle operating nacl solution) storage: 40c, 93% rel. humidity storage duration: 22 h per cycle number of cycles: 3 table 7: temperature specifications, valid for air pressure of 800 - 1200 hpa (800 - 1200 mbar) temperature standard -7 option -9 characteristics conditions min max min max unit t a ambient temperature operational 1 ?25 71 ?40 71 c t c case temperature ?25 95 ?40 95 t s storage temperature non operational ?40 100 ?55 100 1 see: thermal considerations table 8: mtbf and device hours mtbf g round benign ground fixed ground mobile device hours 1 mtbf acc. to mil-hdbk-217f t c = 40c t c = 40c t c = 70c t c = 50c 660 000 143 000 h 81 000 h 68 000 h 2 800 000 h 1 statistical values, based on an average of 4300 working hours per year and in general field use electromagnetic emission for emission levels refer to: electrical input data . 07018 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 fig. 11 typical disturbance voltage (quasi-peak) at the input ac- cording to en 55011/22 measured at v i nom and i o nom . www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 9 of 13 mechanical data dimensions in mm. tolerances 0.3 mm unless otherwise specified. gi? go? vo+ i vi+ d u o u t gr 7.5 27.5 18.5 11.3 40 7.5 10 7.5 10 (14) 7.5 10 2 4.3 min. 8 5 0.5 144 12.5 1 43 1 (45) 88 1 7 2 151 1 32.2 0.5 2.8 x 0.8 8.1 1 6.35 1 6.3 x 0.8 distance between m4 mounting screws measuring point of case temperature t c yellow led output voltage indicator potentiometer (option p) potentiometer (option d) 0902 3 u o fig. 12 case c03, weight 440 g aluminium, black finish and self cooling european projection standards and approvals all switching regulators are ul recognized according to ul 1950, ul 1012 and en 60950, ul recognized for canada to can/csa c22.2 no. 234-m90. the units have been evaluated for: building in, operational insulation from input to output and input/out- put to case, the use in an overvoltage category ii environment, the use in a pollution degree 2 environment. the switching regulators are subject to manufacturing sur- veillance in accordance with the above mentioned ul and csa and with iso 9001 standards. isolation electric strength test voltage between input interconnected with output against case: 750 vdc, 1 s. this test is performed in the factory as routine test in accordance with en50116, 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. safety and installation instructions installation instruction installation of the switching regulators 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. check for hazardous voltages before altering any connec- tions. connections can be made using fast-on or soldering technique. the input and the output circuit are not separated, i.e. the negative path is internally interconnected! the units should be connected to a secondary circuit. 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. 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 is ip 20. www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 10 of 13 table 9: insulation concept leading to an selv output circuit conditions front end switching r egulator result supply minimum required grade maximum minimum required safety measures to achieve the safety status of voltage of isolation, to be provided dc output stat us of the front end specified safety status of the the switching by the ac-dc front end, voltage output circuit output circuit regulator output including mains supplied from the circuit battery charger front end 1 battery double or reinforced 60 v selv circuit none selv circuit supply, >60 v earthed hazardous voltage input fuse 3 non accessible earthed selv considered secondary circuit 2 case 5 circuit as secon- unearthed hazardous input fuse 3 and unearthed, unearthed selv dary circuit voltage secondary circuit 5 non accessible case 5 circuit hazardous voltage input fuse 3 and earthed output earthed selv secondary circuit circuit 4 and non accessible circuit case 5 mains basic 60 v earthed selv circuit 4 none 250 v ac elv circuit input fuse 3 and earthed output >60 v hazardous voltage circuit 4 and non accessible secondary circuit case 5 double or reinforced 60 v selv circuit none selv circuit >60 v double or reinforced insu- input fuse 3 and unearthed unearthed selv lated unearthed hazardous and non accessible case 5 circuit voltage secondary circuit 5 1 the front end output voltage should match the specified input voltage range of the switching regulator. 2 the conductor to the gi? terminal of the switching regulator has to be connected to earth by the installer according to the rel evant safety standard, e.g. iec/en 60950. 3 the installer shall provide an approved fuse (slow blow type with the lowest current rating suitable for the application, max. 12.5 a) in a non-earthed input conductor directly at the input of the switching regulator. if vo+ is earthed, insert the fuse in the gi- l ine. for ul?s purpose, the fuse needs to be ul-listed. if option c is fitted, a suitable fuse is already built-in in the vi+ line. 4 the earth connection has to be provided by the installer according to the relevant safety standard, e.g. iec/en 60950. 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. safety of operator accessible output circuit if the output circuit of a switching regulator is operator-ac- cessible, 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 switching regulator to be an selv circuit according to iec/en 60950 up to a nominal output voltage of 30 v, or 48 v if option c is fitted. however, it is the sole responsibility of the installer or user to assure the compliance with the relevant and applicable safety regulations. more information is given in: technical information: safety & emc . www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 11 of 13 description of options -9 extended temperature range the operational ambient temperature range is extended to t a = ?40 to 71c. ( t c = ?40 to 95c, t s = ?55 to 100c.) p potentiometer option p excludes r function. the output voltage v o can be adjusted with a screwdriver in the range from 0.92 - 1.08 of the nominal output voltage v o nom . however, the minimum differential voltage d v iomin between input and output voltages as specified in: electrical input data should be maintained. l input filter option l is recommended to reduce superimposed inter- ference voltages and to prevent oscillations, if input lines exceed approx. 5 m in total length. the fundamental wave (approx. 120 khz) of the reduced interference voltage be- tween vi+ and gi? has, with an input line inductance of 5 h, a maximum magnitude of 4 mvac. a reduction can be achieved by insertion of a capacitor across the input (e.g. plastic foil between vi+ and gi?). the input impedance of the switching regulator at 120 khz is about 3.5 ? . the harmonics are small in comparison with the fundamental wave. see also: electrical input data: rfi . c crowbar this option is recommended to protect the load against power supply malfunction, but it is not designed to sink ex- ternal currents. a fixed-value monitoring circuit checks the output voltage v o . when the trigger voltage v o c is reached, the thyristor crowbar triggers and disables the output. it may be deacti- vated by removal of the input voltage. in case of a switching transistor defect, an internal fuse prevents excessive cur- rent. note: as a central overvoltage protection device, the crow- bar is usually connected to the external load via distributed inductance of the lines. for this reason, the overvoltage at the load can temporarily exceed the trigger voltage v oc . de- pending on the application, further decentralized over- voltage protection elements may have to be used addition- ally. with option l, the maximum permissible additionally su- perimposed ripple u i of the input voltage (rectifier mode) at a specified input frequency f i has the following values: units with max input voltage 40 v: u i max = 12 v pp at 100 hz or v pp = 1200 hz/ f i 1v units with max input voltage 80 v: u i max = 22 v pp at 100 hz or v pp = 2200 hz/ f i 1v d save data input undervoltage monitor note: output instead of input undervoltage monitor is available on request (option d1). terminal d and go? are connected to a normally conduct- ing field effect transistor (jfet). the switching characteris- tics of the option d output are shown in fig. definition of v t and v h . a 0.5 w zener diode provides protection against overvoltages. the voltage v t can be externally adjusted with a trim poten- tiometer by means of a screwdriver. the hysteresis v h of v t is <2%. terminal d stays low for a minimum time t low min , in order to prevent any oscillation. v t can be set to a value between v i min and v i max . please note that the jfet be- comes conductive when v d increases above 7 v approx. fig. 13 test circuit with definition of voltage v d and current i d vi + gi ? go ? 8.2 v d v d +5 v 100 pf i d 10 k ? jfet v t 11025 table 10: crowbar trigger levels characteristics conditions 5.1 v 12 v 15 v 24 v 36 v unit min max min max min max min max min max v o c trigger voltage v i min - v i max 5.8 6.8 13.5 16 16.5 19 27 31 40 45.5 v i o = 0 - i o nom t s delay time t c min - t c max 1.5 1.5 1.5 1.5 1.5 s www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 12 of 13 application examples: a) the signal v d can be utilized in battery powered systems to provide a warning in case of low batteries. b) in case of power failure, the signal can serve to initiate data save routines. data table 11: option d data characteristics conditions psc unit min typ max v d low voltage - terminal d at low impedance v i < v t , i d - 2.5 ma 0.8 v v d high voltage - terminal d at high impedance v i > v t + v h , i d > 25 a 4.75 t low min minimum duration v d low 30 ms t d f response time to v d low 1 s i d max maximum current - terminal d 20 ma accessories a variety of electrical and mechanical accessories are available including: ? pcb-tags and isolation pads for easy and safe pcb- mounting. ? ring core chockes for ripple and interference reduction. for more detailed information please refer to: accessories on the power-one homepage. nuclear and medical applications - power-one products are not authorized for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems without the express written 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. fig. 14 definition of v t and v h v d v d high v d low v t v i v h 11026 www.datasheet.co.kr datasheet pdf - http://www..net/
psc series extended data sheet positive switching regulators (industrial) rev. may 12, 2004 page 13 of 13 ec declaration of conformity we power-one ag ackerstrasse 56 ch-8610 uster declare under our sole responsibility that all psx series switching regulators carrying the ce-mark are in conformity with the provisions of the low voltage directive (lvd) 73/23/ eec of the european communities. conformity with the directive is presumed by conformity wih the following harmonized standards: ? en 61204: 1995 (= iec 61204: 1993, modified) low-voltage power supply devices, d.c. output - perfomance characteristics and safety requirements ? en 60950: 1992 + a1: 1993 + a2 (= iec 950 second edition 1991 + a1: 1992 + a2: 1993) safety of information technology equipment the installation instructions given in the corresponding data sheet describe correct installation leading to the presumption of conformity of the end product with the lvd. all psx series switching regulators are components, intended exclusively for inclusion within other equipment by an industrial assembly operation or by professional installers. they must not be operated as stand alone products. hence conformity with the electromagnetic compatibility directive 89/336/eec (emc directive) needs not to be declared. nevertheless, guidance is provided in most product application notes on how conformity of the end product with the indicated emc standards under the responsibility of the installer can be achieved, from which conformity with the emc directive can be presumed. uster, 14 oct. 2003 power-one ag rolf baldauf johann milavec director engineering director projects and ip www.datasheet.co.kr datasheet pdf - http://www..net/

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