www.micropowerdirect.com micropower direct 292 page street suite d stoughton, ma 02072 usa t: (781) 344-8226 f: (781) 344-8481 e: sales@micropowerdirect.com w: www.micropowerdirect.com key features: ? 75w output power ? meets en 50155 ? en 60950 approved ? en 50121-3-2 compliant ? wide input range ? 3,000 vac rms isolation ? reinforced insulation ? 92% ef ciency ? meets en 61373 ? remote on/off mr75-xxsrw compact, 75w wide input railway dc/dc con vert er input parameter conditions min. typ. max. units input voltage range 72 vdc input 43.0 72.0 101.0 vdc 110 vdc input 66.0 110.0 160.0 input start voltage 72 vdc input 43.0 vdc 110 vdc input 66.0 under voltage shutdown 72 vdc input 40.0 vdc 110 vdc input 63.0 input filter pi () filter output parameter conditions min. typ. max. units output voltage accuracy ?.0 % line regulation v in = min to max ?.2 % load regulation i out = 0% to 100% ?.3 % ripple & noise (20 mhz) see note 1 150 mv pk-pk transient response time, see note 2 25% load change 250 s temperature coef cient ?.02 %/? output over load protection see note 3 150 %i out output short circuit continuous (hiccup mode) general parameter conditions min. typ. max. units isolation voltage, reinforced insulation input/output 3,000 vac rms input/output to case 1,500 vdc isolation resistance 500 vdc 1,000 m? isolation capacitance 100 khz/1v 3,000 pf switching frequency 320 khz environmental parameter conditions min. typ. max. units operating temperature range ambient, see note 4 -40 +25 +61 ? thermal impedance, without heat sink natural convection 7.5 ?/w 100 lfm 6.1 200 lfm 5.3 400 lfm 3.9 thermal impedance, with heat sink natural convection 6.8 ?/w 100 lfm 4.1 200 lfm 3.3 400 lfm 2.2 operating temperature range base plate -40 +105 ? thermal shutdown base plate +110 ? cooling see derating curves (page 3) humidity rh, non-condensing 95 % physical case size 2.28 x 1.45 x 0.78 inches (57.90 x 36.8 x 20.00 mm) case material black anodized aluminum case with aluminum plate/heat sink weight 2.6 oz (74.0g) remote on/off parameter conditions min. typ. max. units unit on 3.5 vdc - 12.0 vdc or open circuit unit off 0 vdc - 1.2 vdc or short circuit control input current, on v ctrl = 5v 0.5 ma control input current, off v ctrl = 0v -0.5 ma control common referenced to -v in (pin 3) standby input current 2.5 ma reliability speci? cations parameter conditions min. typ. max. units mtbf mil hdbk 217f, 25?, gnd benign 143.8 khrs absolute maximum ratings, see note 5 parameter conditions min. typ. max. units input voltage surge (100 ms) 77 vdc input -0.7 165.0 vdc 110 vdc input -0.7 250.0 lead temperature 1.5 mm from case for 10 sec 260 ? electrical speci? cations speci cations typical @ +25?, nominal input voltage & rated output current, unless otherwise noted. speci cations subject to change without notice. series
292 page street ste d stoughton, ma 02072 tel: (781) 344-8226 fax: (781) 344-8481 e-mail: sales@micropowerdirect.com www.micropowerdirect.com model selection guide notes: 1. output noise is measured with a 10 f tantalum capacitor and a 1.0 f ceramic capacitor connected in parallel across the output. ripple & noise is 150 mv typical for 24 vdc output models. 2. transient recovery is measured to within a 1% error band for a load step change of 75% to 100%. 3. output overload protection is provided by a ?iccup mode circuit 4. the ambient temperature range is the maximum possible for a converter with a heatsink mounted. natural convection is 20 lfm, not ?till air? see the power derating curves on page 3 for the operating temperature limits for speci c models. model number input output re? ected ripple current (ma typ) over voltage protection (vdc) capacitive load (f, max) ef? ciency (%, typ) fuse rating slow-blow (ma) voltage (vdc) current (ma) voltage (vdc) current (a) nominal range full-load no-load mr75-72s05rw 72 43 - 101 1,170 50 5.0 15.000 35 6.2 25,500 89 3,200 mr75-72s12rw 72 43 - 101 1,132 45 12.0 6.250 35 15 4,400 92 3,200 mr75-72s15rw 72 43 - 101 1,132 45 15.0 5.000 35 18 2,800 92 3,200 mr75-72s24rw 72 43 - 101 1,145 55 24.0 3.125 35 27 1,100 91 3,200 mr75-110s05rw 110 66 - 160 766 40 5.0 15.000 35 6.2 25,500 89 2,100 MR75-110S12RW 110 66 - 160 749 35 12.0 6.250 35 15 4,400 91 2,100 mr75-110s15rw 110 66 - 160 749 35 15.0 5.000 35 18 2,800 91 2,100 mr75-110s24rw 110 66 - 160 758 50 24.0 3.125 35 27 1,100 90 2,100 typical connection emc speci? cations notes: 1. to meet en 55011 class a, and en 50121-3-2, an external input lter is required. see the connection diagram below for a typical circuit. 2. to meet en 61000-4-4 and en 61000-4-5, a capacitor should be connected across the input pins. see the con- nection diagram below for a typical example. 5. exceeding absolute maximum ratings may damage the module. these are not continuous operating ratings. 7. operation at no-load will not damage these units, but they may not meet all speci cations. 8. if the remote sense outputs are not used, the +sense (pin 7) should be connected to +v out (pin 8) and the -sense (pin 5) should be connected to -v out (pin 4). 9. it is recommended that a fuse be used on the input of a power supply for protection. for the correct rating, see the model selection table above. parameter standard level radiated emissions see note 1 en 50121 class a conducted emissions see note 1 en 55011 class a esd en 61000-4-2 criteria a; ? kv air, ? kv contact rs en 61000-4-3 criteria a; 10v/m eft see note 2 en 61000-4-4 criteria a; ? kv surge see note 2 en 61000-4-5 criteria a; ? kv cs en 61000-4-6 criteria a; 10 v/m environmental standards parameter standard vibration & shock en 61373 cooling test en 60068-2-1 dry heat en 60068-2-2 damp heat en 60068-2-30 for applications that require meeting emc/emi standards, the diagram above illustrates a typical connection of the mr75-xxxsxxrw series. the units do not require external components to operate as speci ed. some notes on this diagram (starting with the input circuit) are: 1. it is recommended that an external slow blow fuse be used. the recom- mended fuse rating is shown in the table at right. 2. to meet en 55011 class a & en 50121-3-2, an external input lter is required. in the diagram this lter consists of c 1 and l 1 . the recom- mended component values are shown in the table at right. 3. to meet en 61000-4-4 and en 61000-4-5, a capacitor should be connected across the input pins. in the connection diagram above, the value of c 1 should be changed to 470 f/200v. 4. recommended values for components are: component 72 v in 110 v in fuse 3,200 ma 2,100 ma c 1 68 f/200v 68 f/200v l 1 450 h 450 h c 3 2,200 pf/3 kv 2,200 pf/3 kv c 4 2,200 pf/3 kv 2,200 pf/3 kv c 5 2,200 pf/3 kv 2,200 pf/3 kv c 6 2,200 pf/3 kv 2,200 pf/3 kv c 7 4.7 f 4.7 f 5. the circuit consisting of r 1 , q 1 and c 2 illustrates a simple open collector connection for the remote on/off control. the resistor (r 1 ) limits the current on the control line and the capacitor (c 2 ) bypasses noise spikes, helping to prevent phantom triggering of the control. if the control pin is not being used, it should be left open. 7. the resister r 2 is connected as an output adjust. the output adjustment capability is explained further on page 3. 8. the output sense pins (pin 7 and pin 5) may be used to compensate for the losses incurred over long leads to an output load. if not used for load compensation or output adjustment, the sense pins should be connected directly to the appropriate output pins, pin 7 to pin 8 and pin 5 to pin 4. 9. the output ltering capacitor (c 7 ) is a low esr (<1 ) electrolytic capacitor. care must be taken in choosing this capacitor not to exceed the capacitive load speci cation for the unit.
micropower direct 292 page street ste d stoughton, ma 02072 tel: (781) 344-8226 fax: (781) 344-8481 e-mail: sales@micropowerdirect.com www.micropowerdirect.com micropower direct 292 page street ste d stoughton, ma 02072 tel: (781) 344-8226 fax: (781) 344-8481 e-mail: sales@micropowerdirect.com w ww.m i cropower di rect.com www.micropowerdirect.com mr75-110s24rw with heatsink mr75-110s24rw without heatsink mr75-72s24rw , MR75-110S12RW & mr75-110s15rw with heatsink mr75-72s24rw , MR75-110S12RW & mr75-110s15rw without heatsink mr75-72s12rw & mr75-72s15rw with heatsink mr75-72s12rw & mr75-72s15rw without heatsink derating curves mr75-72s05rw & mr75-110s05rw with heatsink mr75-72s05rw & mr75-110s05rw without heatsink
micropower direct we power your success - for less! 292 page street ste d stoughton, ma 02072 tel: (781) 344-8226 fax: (781) 344-8481 e-mail: sales@micropowerdirect.com www.micropowerdirect.com mechanical dimensions - with optional heatsink mechanical notes: all dimensions are typical in inch es (mm) tolerance x.xx = ?.02 (?.50) w ww.m i cropower di rect.co m www.micropowerdirect.com micropower direct w e p o w e r y o u r s u c c e s s - f o r l e s s ! we power your success - for less! 292 page street ste d stoughton, ma 02072 tel: (781) 344-8226 fax: (781) 344-8481 e-mail: sales@micropowerdirect.com pin description 1+v in 2 remote on/off 3-v in 4-v out 5 -sense 6 trim 7 +sense 8+v out pin connections mechanical dimensions pin d escr ip t i o n 1 +v in 2 remote on 3 - v in 4 - v o u t 5 - s ens e 6 t r i m 7 +se nse 8 + v out pin c onnect i for the heatsink option, add suf x ??to the model number (i.e. mr75- 110s12rw-h ) output voltage adjustment a simple external circuit may be used to adjust the converter output. the range of adjustment is ?0%. to adjust the output down, connect a 5%, 3w resistor from the plus sense pin (7) to the v out trim pin (6). to adjust the output up, connect a 5%, 3w resistor from the minus sense pin (5) to the v out trim pin. for up/ down trimming, connect a 10 k potentiometer from the plus to the minus sense pins. connect the wiper arm to the v out trim pin. for a table of trim resistor values, contact the factory.
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