the copyright and authority for the interpretation of the products are reserved by mornsun k78a1-1500 a/0-2012 page 1 of 4 k78a1-1500(l) series wide input non-isolated & regulated single output rohs part number system output current outputvoltage product series k78a1-1500 features efficiency up to 78% operating temperature range: -40 c ~ +85 c pin-out compatible with lm78xx linears short circuit protection, thermal shutdown low ripple and noise sip package, meet ul94-v0 low temperature rise industry standard pinout applications k78a1-1500(l) series high efficiency switching regulators are ideally suited to replace 78xx linear regulators and are pin compatible. selection guide input voltage(vdc) efficiency (%,max) part number nominal range ouput voltage (vdc) ouput current (ma) vin(min) vin (max) k78a1-1500(l) 12 4.75-14 1.2 1500 78 75 note: add suffix l for 90 bend pins, for example: K78A1-1500L. input specifications item test conditions min. typ. max. unit no-load input power input voltage range -- 0.096 0.112 w reverse polarity input forbidden input filter capacitance filter 4.7 f output specifications item test conditions min. typ. max. unit output voltage accuracy 100% load input voltage range -- 2 3 line regulation input voltage range -- 0.5 1.0 load regulation from 10% to 100% full load -- 0.5 1.0 % dynamic load stability 10%<->100% load -- -- 350 mv switching frequency 100% load, input voltage range 300 340 380 khz output current limit -- 5000 -- static current vin=min to max at 0% load 5 8 ma temperature drift -40 +85 -- -- 0.02 %/ c ripple & noise* 20mhz bandwidth (refer to figure 2) -- 25 35 mvp-p over temperature protection ic inside -- 150 -- short circuit protection continuous, automatic recovery max. capacitive load -- -- 1000 f note:* ripple and noise tested by parallel cable method. see detailed operation instructions at testing of power converter section, application notes. common specifications item test conditions min. typ. max. unit mtbf mil-hdbk-217f@25 2000 -- -- k hours
the copyright and authority for the interpretation of the products are reserved by mornsun k78a1-1500 a/0-2012 page 2 of 4 case material plastic (ul94-v0) weight -- 4.0 -- g environmental specifications item test conditions min. typ. max. unit storage humidity non condensing -- -- 95 % operating temperature power derating (above 71 ) -40 -- 85 storage temperature -55 -- 125 the max. case temperature operating temperature curve range -- -- 100 lead temperature 1.5mm from case for 10 seconds -- -- 300 c cooling free air convection typical application circuit k78a1-1500(l) 1 2 3 +vin gnd +vout c2 c1 (figure 1) positive output parallelling application circuit external capacitor table part number c1 (ceramic capacitor) c2 (ceramic capacitor) k78a1-1500(l) 10 f/25v 22 f/6.3v note 1. in order to the circuit work in the best status, c1 and c2 must be added in the circuit, and they should be placed as near as the products' footprints. 2. the capacitance of c1,c2 sees external capacitor table, it can be increased properly if required, and tantalum or low esr electrolytic capacitors may also suffice. 3. cannot use in parallel and hot swap. test configurations (ta=25 c) 1.efficiency and output voltage ripple test scope ceramic 3 +vin gnd +vout c2 c1 25.4mm 1 2 . 5 4 m m dc/dc converter 2 25.4mm 12.7mm 1f 10f tantalum copper strip copper strip l o a d (figure 2) 2.start-up and load transient response test 3 +vin gnd +vout c2 c1 50.8 mm 1 2 . 5 4 m m dc/dc converter 2 scope copper strip l o a d copper strip (figure 3)
the copyright and authority for the interpretation of the products are reserved by mornsun k78a1-1500 a/0-2012 page 3 of 4 output ripple reduction 3 +vin gnd vout 1 dc/dc converter c1 22f 2 c2 l o a d l to reduce output ripple, it is recommended to add a lc filter in output port. l: recommended parameter 10 h ~ 47 h. (figure 4) typical derating curve operatingtemperature ( ) c typical character curve efficiency vs input voltage curve (full load) 50 55 60 65 70 75 80 85 90 4.756 7 8 9 10 11 12 13 14 input voltage(v) efficiency(%) k78a1-1500(l) ripple vs input voltage curve (full load) 0 2 4 6 8 10 12 14 16 4.756 7 8 9 10 11 12 13 14 input voltage (v) ripple(mv) k78a1-1500(l) efficiency vs output load curve (vin=vin-nominal) 50 55 60 65 70 75 80 85 90 10 2030 40 5060 70 8090100 total output current (%) efficiency(%) k78a1-1500(l) ripple vs output load curve (vin=vin-nominal) 0 2 4 6 8 10 12 14 16 10 20 30 40 50 60 70 80 90100 total output current (%) ripple(mv) k78a1-1500(l)
the copyright and authority for the interpretation of the products are reserved by mornsun k78a1-1500 a/0-2012 page 4 of 4 outline dimensions, recommended footprint & packaging 1 3 2 +vin gnd +vout footprint details l=530mm[20.866inch] devices per tube quantity: 44pcs l=220mm[8.661inch] devices per tube quantity: 17pcs short tube inner packaging dimensions: l*w*h=255*170*80mm short tube outer packaging dimensions(with six inner packaging boxes): l*w*h=375*280*270mm long tube inner packaging dimensions: l*w*h=580*200*100mm long tube outer packaging dimensions(with two inner packaging boxes): l*w*h=600*215*220mm long tube outer packaging dimensions(with three inner packaging boxes): l*w*h=600*215*325mm pin function 11.60 [0.457] 2 7 . 1 0 [ 1 . 0 6 7 ] 2 0 . 6 0 [ 0 . 8 1 1 ] 6.60 [0.260] 11.40 [0.449] 2 3 . 4 0 [ 0 . 9 2 1 ] 2 0 . 4 0 [ 0 . 8 0 3 ] 11.00 [0.433] 16.00 [0.630] 4 . 2 0 [ 0 . 2 0 5 ] mechanical dimensions recommended footprint tube outline dimensions (bottom view) 5.08 [0.200] 4.10 [0.161] 17.50 [0.689] 0 . 5 0 [ 0 . 0 2 0 ] 9 . 0 0 [ 0 . 3 5 4 ] 11.50 [0.453] 0 . 3 0 [ 0 . 0 1 2 ] 0.50 [0.020] 2 . 1 5 [ 0 . 0 8 5 ] 123 9.00 [0.354] 1 1 . 5 0 [ 0 . 4 5 3 ] 5 . 0 8 [ 0 . 2 0 0 ] 1 7 . 5 0 [ 0 . 6 8 9 ] 0 . 3 0 [ 0 . 0 1 2 ] 1 9 . 0 0 [ 0 . 7 4 8 ] 0 . 5 0 [ 0 . 0 2 0 ] 4.10 [0.161] 1 2 3 1 .00 [0.039] 123 note: grid:2.54*2.54mm. k78xx 3 2 1 1 .00 [0.039] k78xx-l (bottom view) (front view) (front view) note: unit:mm[inch] pin section tolerances: 0.10mm[ 0.004inch] general tolerances: 0.25mm[ 0.010inch] note: unit:mm[inch] general tolerances: 0.50mm[ 0.020inch] k78xx k78xx-l k78xx k78xx-l note: 1. max. capacitive load tested at input voltage range and full load. 2. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 3. in this datasheet, all the test methods of indications are based on our corporate standards. 4. all characteristics are for listed model, non-standard models may perform differently, please contact our technical person for more detail. 5. contact us for your specific requirement. 6. specifications subject to change without prior notice. mornsun science & technology co.,ltd. address: no. 5, kehui st. 1, kehui development center, science ave., guangzhou science city, luogang district, guangzhou,p.r.china. tel: 86-20-28203030 fax:86-20-38601272 http://www.mornsun-power.com
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