the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice LH25-10B37 a/0-2012 page 1 of 4 LH25-10B37 ----- is a compact size power converter offered by mornsun. it features universal input voltage, taking both dc and ac input voltage, low power consumption, high efficiency, high reliability, safer isolation. it offers good emc performance, and widely used in industrial, office and civil applications. for harsh emc environment, this series of products must use the refered application circuit. rohs product features 1.universal input :85 ~ 264vac,50/60hz 2.regulated output, low ripple and noise 3.efficiency up to 85% 4.over-current, short circuit and over-temperature protection 5.plastic case, meets ul94v-0 part number system LH25-10B37 output voltage output style input voltage isolation voltage rated power package style product series selection guide approval model package power output (vo/io) ripple and noise(typ) efficiency (%)(typ.) LH25-10B37 70x48x23.5mm 25w 37v/670ma 50mv 85 input specifications input voltage range 85 264vac, 120 370vdc input frequency 47 63hz input current 110vac 420ma, typ 230vac 230ma, typ inrush current 110vac 16a, typ 230vac 30a, typ leakage current 0.3ma rms typ./230vac/50hz recommended external input fuse 3.15a/250v slow-blow output specifications voltage set accuracy 2% input variation 0.5% load variation (10-100%) 1% minimum load 0% ripple & noise(p-p) 20mhz bandwidth 50mv (typ) 100mv (max) short circuit protection continuous, and auto resume over current protection 110% io output over-voltage protection 43vdc common specifications temperature specifications operating temperature power derating (55 70 ) (-40 -10 ) storage temperature case temperature -40 +70 3.75% / 2% / -40 +105 +90 m ax hold-up time (vin=230vac) 80ms(typ) humidity 95%(max) temperature coefficient 0.02%/ switching frequency 65khz(typ.)
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice LH25-10B37 a/0-2012 page 2 of 4 i/o-isolation voltage 3000vac/1min ce cispr22/en55022, class b( without external circuit ) emi re cispr22/en55022, class b( without external circuit ) esd iec/en 61000-4-2 contact 6kv / air 8kv perf. criteria b rs iec/en 61000-4-3 10v/m perf. criteria a iec/en 61000-4-4 2kv( without external circuit ) perf. criteria b eft iec/en 61000-4-4 4kv (with typical applications figure 3) perf. criteria b iec/en 61000-4-5 1kv/ 2kv( without external circuit ) perf. criteria b emc ems surge iec/en 61000-4-5 2kv/ 4kv (with typical applications figure 3) perf. criteria b safety standards iec60950,en60950,ul60950 safety class class case material ul94v-0 install pcb mtbf >300,000h @25 weight 120g note: 1. ripple and noise are measured by the method of parallel lines; 2. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified; 3. all characteristics are for listed model only, non-standard models may perform differently, please contact our technical person for more detail. parallel lines measure ac-dc +vo -vo fuse l n 25.4mm 25.4mm c1 c2 12.7mm copper sheet connect oscillograph probe load l n c1: 1 f (ceramic capacitor) c2: 10 f (electrolytic capacitor) input voltage vs load temperature vs load 100 240 85 264 20 40 100 60 80 75 load(%) input voltage(vac) *note: when input dc, vdc=1.414 * vac-20 . -40 -10 55 70 100 80 60 40 20 43.75 temperature ( ) load % trim application & trim calculation application circuit for trim (part in broken line is the interior of models) 0v r 2 r 1 r 3 v ref r t trim +vot 0v r 2 r 1 r 3 v ref r t trim +vot trim up trim down formula for resistance of trim up: a= vref vot-vref r 1 r= t ar 2 r-a 2 -r 3 down: a= vref vot-vref r 2 r= t ar 1 r-a 1 -r 3 note: value for r1, r2, r3, and vref refer to the following table. r t : resistance of trim a: user-defined parameter, no actual meanings. vo(v) resistance 37 r1(k ) 33 r2(k ) 2.4 r3(k ) 1 vref(v) 2.5 vot(v) output voltage of trim, variation 10%
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice LH25-10B37 a/0-2012 page 3 of 4 typical applications l +vo -vo l n n c2 c1 tvs1rl ntc fuse (figure 1) l n +vo -vo ac-dc l n +vo -vo (figure 2) note: this application is not supported for this series. can use mornsun s fc-l01d fuse output n l n l lcm mov1 r2 r1 r3 cx cy3 cy4 acdc cy1 cy2 figure 3: recommended circuit for application require higher emc standard (external circuit output same as above) figure 4: emc application circuit pcb layout safety and recommend wiring: linewidth a 3mm,b 6mm,c 9mm external capacitors typical value(unit: f) model c1 c2 ntc tvs1 LH25-10B37 1 68 5d-9 smbj43a note: 1. output filtering capacitors c2 is electrolytic capacitors, it is recommended to use high frequency and low impedance electrolytic capacitors. fo r capacitance and current of capacitor please refer to manufacture s datasheet. voltage derating of capacitor should be 80% or above. c1 is use to filter high frequency noise suggest choose 1 f. tvs is recommended component to protect post-circuits (if converter fails). external input ntc is recommended to use 5d-9. 2. for standard emc requirement, please refer to figure 1, if higher emc requirement, please refer to figure 3. mov: varistor, model: 561kd14, it is used to protect the device under surge; r1 r2 2 /3w winding resistor r3 1m /2w cy1 cy2 cy3 cy4 102m/400vac cx 224k/275vac lcm 10mh-30mh fc-l01d mornsun s 2kv/4kv surge protector. 3. fuse recommended to use 3.15a/250v. outline dimensions & recommended footprint 4 8 . 0 0 [ 1 . 8 9 0 ] 4 0 . 0 0 [ 1 . 5 7 4 ] 70.00 [2.756] 62.00 [2.440] 2 3 . 5 0 [ 0 . 9 2 5 ] 6 . 0 0 [ 0 . 2 3 6 ] 2 3 . 0 0 [ 0 . 9 0 6 ] 5 4 1 2 3 trim 3 5 4 1 2 trim 1.00[0.039] 1.50[0.059] 1 2 3 4 5 ac(n) ac(l) -vo +vo pin function trim trim 5 . 7 5 [ 0 . 2 2 6 ] note: unit:mm[inch] pin tolerances: 0.10mm[ 0.004inch] general tolerances: 0.50mm[ 0.020inch] diameter (frontview ) (bottom view ) note: grid2.54*2.54mm. footprint details
the copyright and authority for the interpretation of the products are reserved by mornsun specifications subject to change without notice LH25-10B37 a/0-2012 page 4 of 4 package diagram inner packaging box dimensions: l*w*h=355*192*93mm packaging quantity: 20pcs outer packaging box dimensions: l*w*h=405*380*305mm packaging quantity: 120pcs 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
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