the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. krb_p-3w a/2-2012 page 1 of 2 krb_p-3w series 3w,wide input, non-isolated & regulated single output dc-dc converter rohs product program input output voltage (vdc) current (ma) part number nominal range voltage (vdc) max min efficiency (%, typ) package style krb 1203p - 3 w 3.3 900 9 0 8 2 dip KRB1205P-3W 12 9~18 5 600 60 85 dip models listed with strike-through text have been officially discontinued. output specifications item test conditions min typ max units output power see below products program 0.3 3 w voltage accuracy refer to recommended circuit 1 3 load regulation from 10% to 100% load 0.5 0.75 line regulation input voltage from low to high 0.2 0.5 % temperature drift (vout) refer to recommended circuit 0.03 %/ c ripple+noise* 20mhz bandwidth 75 150 mvp-p switching frequency 100% load, nominal input voltage 80 400 khz *t est ripple and noise by parallel cable method. see detailed operation instructions at testing of power converter section, application notes. note: 1. all specifications measured at t a =25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 2. see below recommended circuits for more details. features efficiency to 85% temperature range: -20 c to +71 c ul94-v0 package no heat sink required industry standard pinout mtbf>1,000,000 hours applications the krb_p series are specially designed for applications where a wide range input voltage power supplies are non-isolated from the input power supply in a distributed power supply system on a circuit board. these products apply to: 1) where the voltage of the input power supply is wide range. 2) where the regulation of the output voltage and the output ripple noise are not demanding. 3) where the regulation of the output voltage and the output ripple noise are not demanding. model selection krb1203p-3w product series input voltage output voltage package style rated power 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: 86-20-38601850 fax:86-20-38601272 http://www.mornsun-power.com
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice. krb_p-3w a/2-2012 page 2 of 2 common specifications item test conditions min typ. max units storage humidity 95 % storage temperature -55 125 operating temp. -20 71 lead temperature 1.5mm from case for 10 seconds 300 temp. rise at full load 15 25 c cooling free air convection case material plastic (ul94v-0) mtbf 100 k hours weight 15 g typical charecteristics 0 20 40 60 80 100 120 -20 0 40 71 120 55 o u t p u t p o w e r ( % ) operating temp.() temperature derating graph safe operating graph outline dimensions & footprint details 9 . 6 0 [ 0 . 3 7 8 ] 4 . 1 0 [ 0 . 1 6 1 ] 2.54 [0.100] 22.86 [0.900] 31.80 [1.252] 1 5 . 2 4 [ 0 . 6 0 0 ] 2 0 . 3 0 [ 0 . 7 9 9 ] 0 .50 [0.020] 1 .00 [0.039] 23.50 [0.925] 10.50 [0.413] 1 3 . 0 0 [ 0 . 5 1 2 ] 1 9 . 0 0 [ 0 . 7 4 8 ] 2 23 161514 11 10 9 22 3 2 23 1615 14 11 10 9 22 3 notegrid 2.54*2.54mm . 2,3,16 14 22,23 gnd +vo vin others nc mechanical dimensions recommended footprint tube outline dimensions (front view) (bottom view) note: unit: mminch tolerances:mminch general tolerances:mminch [] 0.10 [ 0.004 ] 0.25 [ 0.010 ] pin diameter footprint details pin function ncnoconnection : shorttubeinnerpackagingdimensions: l*w*h=255*170*80mm; shorttubeouterpackaging dimensions (withsixinnerpackagingboxes): l*w*h=375*280*270mm; long tubeinnerpackagingdimensions: l*w*h=580*200*100mm; long tubeouterpackagingdimensions(withtwoinnerpackagingboxes) l*w*h=600*215*220mm; long tubeouterpackagingdimensions(with threeinnerpackagingboxes) l*w*h=600*215*325mm. note: unitmm[inch] generaltolerance : 0.50mm[ 0.020inch] l=530mm[20.866 inch]packagingquantity:15pcs l=220mm[8.661inch] pcs packagingquantity:6 application note recommended circuit all the krb_p series have been tested according to the follow ing recommended testing circuit before leaving factory. (figure 1). vin gnd +vout gnd + krb series dc-dc + (figure 1) load cin cout if you want to further decrease the input/output ripple, you can increase capacitance properly or choose capacitors with low esr. however, the capacitance should not be too high , recommended parameter sees (table 1). external capacitor table (table 1) cin cout normal temp. cout (-20 cto+71 c) 100uf 100uf (electrolytic capacitor) 47uf (tantalum capacitor) input current when it is used in unregulated power supply, be sure that the fluctuating range of the power. s upply and the rippled voltage do not exceed the module standard. input current of power supply sh ould afford the startup current of this kind of dc/dc module (figure 2) i n p u t c u r r e n t ( a ) input voltage (v) input voltage range ip output load in order to ensure the product operate efficiently and reliably, in addition to a max load (namely full load), a minimum load is specif ied for this kind of dc/dc converter. make sure the specified range of input voltage is not exceeded, the minimum output load no less than 10% full load, if the actual load is less than the specified minimum load, the output ripple may increase sharply. if the actual output power is very small, please add an appropriate resistor as extra loading, or contact our company for other lower output power products. input polarity protection under normal operating conditions, the output circuit of these products has no protection against positive and negative reverse connection . the simplest method is to connect a diode in series at the input end. no parallel connection or plug and play.
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