hybrid ic VLA312-2425 isolated type dc-dc converter description the VLA312-2425 is an isolated dc-dc converter designed to control the industrial equipment. it can input the rectified ac480v (dc850vmax) directly and convert to low voltage. total output power is 25w. features ?input ------------ 475v to 850v dc ?output----------- +24v, 1.05a (25.2w) ?electrical isolation (between input and output) ------------- 2500vrms 1 minute ?over current protection (auto resumption) ?over voltage protection applications on-board pre-regulator for industrial control equipment block diagram main control current sensing control power gate power high side drive low side drive +v in +vo -vo fg -v in rectifier
hybrid ic VLA312-2425 isolated type dc-dc converter 2 maximum ratings (unless otherwise noted, ta=25c) symbol parameter conditions ratings unit v in input voltage - 850 v i o output current - 1.05 a topr operating temperature no condensation (*1) -10 ~ +55 c tstg storage temperature no condensation -20 ~ +75 c viso electrical isolation between input and output sine wave voltage, 60hz, 1min 2500 vrms (*1) please refer to de-rating characteristics. electrical characteristics (unless otherwise noted, v in =680v, ta=25 c) symbol parameter test conditions limits unit min. typ. max. v in input voltage recommended range 475 680 850 v vo output voltage io=0.1 ~ 1.05a 22.8 24.0 25.2 v reg -i input regulation io=1.05a, v in =475~850v - - 100 mv reg -l load regulation io=0.1 ~ 1.05a - - 150 mv vp-p ripple voltage io=1.05a (*2) - - 240 mv efficiency io=1.05a - 77 - % (*2) not contain the spike noise. test circuit diagram l oad a v v in vo io vla312 - 2425 +v o - v o +v in - v in
hybrid ic VLA312-2425 isolated type dc-dc converter 3 typical characteristics 0 10 20 30 40 50 60 70 80 90 100 0.0 0.2 0.4 0.6 0.8 1.0 1.2 efficiency (%) output current io (a) efficiency - output current characteristics vin=600v vin=680v 0 3 6 9 12 15 18 21 24 27 30 0 100 200 300 400 500 600 700 800 900 output voltage vo (v) input voltage v in (v) output voltage - input voltage characteristics rl=22.9ohm (io=1.05a) 0 10 20 30 40 50 60 70 80 90 100 400 500 600 700 800 900 efficiency (%) input voltage v in (v) efficiency - input voltage characteristics io=1.05a 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0 100 200 300 400 500 600 700 800 900 input current i in (a) input voltage v in (v) input current - input voltage characteristics rl=22.9ohm (io=1.05a) 0 3 6 9 12 15 18 21 24 27 30 0 0.5 1 1.5 2 2.5 output voltage vo (v) output current io (a) output voltage - output current characteristics vin=600v vin=680v 0 20 40 60 80 100 120 -10 0 10 20 30 40 50 60 70 80 output current de-rating (%) ambient temperature ( ? ) de-rating characteristics
hybrid ic VLA312-2425 isolated type dc-dc converter 4 for safety using ? ? great detail and careful attention are given to the production activity of hics, such as the development, the quality of produc tion, and in it?s reliability. however the reliability of hics depends not only on their own factors but also in their conditi on of usage. when handling hics, please note the following cautions. cautions packing carrying storage extended storage maximum ratings polarity ? the materials used in packing hics can on ly withstand normal external conditions. when exposed to outside shocks, rain and ce rtain environmental contaminators, the packing materials will deteriorates. please take care in handling. ? 1) don?t stack boxes too high. avoid placing heavy materials on boxes. 2) boxes must be positioned correctly during transportation to avoid breakage. 3) don't throw or drop boxes. 4) keep boxes dry. avoid rain or snow. 5) minimal vibration and shock during transportation is desirable. when storing hics, please observe the following no tices or possible deterioration of their electrical characteristics, risk of solderability, and external damage may occur. 1) devices must be stored where fluctuation of te mperature and humidity is minimal, and must not be exposed to direct sunlight. store at the normal temperature of 5 to 30 degrees celsius with humidity at 40 to 60%. 2) avoid locations where corrosive gasses are generated or where much dust accumulates. 3) storage cases must be static proof. 4) avoid putting weight on boxes. when extended storage is necessary, hics must be kept non-processed. when using hics which have been stored for more than one year or unde r severe conditions, be sure to check that the exterior is free from flaw and other damages. to prevent any electrical damages, use hics wi thin the maximum ratings. the temperature, current, voltage, etc. must not exceed these conditions. to protect hics from destruction and deterioration due to wrong insertion, make sure of polarity in inserting leads into the board holes, conforming to the external view for the terminal arrangement. cn1 cn2 parts no. b2p3-vh, jst b2p-vh, jst polarity (pin1) -v in +v o polarity (pin2) --- -v o polarity (pin3) +v in --- outline dimension connector 90mm 55mm 35mm 5mm cn1 cn2
hybrid ic VLA312-2425 isolated type dc-dc converter 5 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? marketing division, marketing planning department 6-41 tsukuba, isahaya, nagasaki, 854-0065 japan december. 2008 keep safety first in your circuit designs! ? ?~ isahaya electronics corporation puts the maximum effort in to making semiconductor products better and more reliable, but there is always the possibility that trouble may o ccur with them. trouble with semi conductors may lead to personal injury, fire or property damage. remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (1)placement of substitu tive, auxiliary circuits, (2)use of non-flammable material or (3)prevention agains t any malfunction or mishap. notes regarding these materials ? ?~ these materials are intended as a reference to our customers in the selection of the isahaya products best suited to the customer's application; they don't convey any licens e under any intellectual property rights, or any other rights, belong ing to isahaya electronics corporation or a third party. ~ isahaya electronics corporation assumes no responsibility for any damage, or infringement of any third party's rights, originating in the use of any product data, diagrams, c harts or circuit application exampl es contained in these materials . ~ all information contained in these materi als, including product data, diagrams and c harts, represent information on products at the time of publication of these materials, and ar e subject to change by isahaya el ectronics corporation without notic e due to product improvements or other reasons. it is therefore recommended that customer s contact isahaya electronics corporation or an authorized isahaya products distribut or for the latest product information before purchasing a product listed herein. ~ isahaya electronics corporation products are not designed or manufactured for use in a device or system that is used under circumstances in which human life is potentially at stake. please contact isahaya electronics corporation or an authorized isahaya products distributor when consideri ng the use of a product contained herein for any specific purposes, such as apparatus or systems for transportation, vehicular, medical, aerospace, nuclear, or undersea repeater use. ? ?~ the prior written approval of isahaya electronics corporation is nec essary to reprint or reproduce in whole or in part these materials. ? ?~ if these products or technologies are subject to the japanese export control restrictions, they must be exported under a license from the japanese gov ernment and cannot be imported into a count ry other than the approved destination. any diversion or re-export contrary to the export control laws and regulations of japan and/or the country of destination is prohibited. ? ?~ please contact isahaya electronics corporation or an authoriz ed isahaya products distributor for further details on these materials or the products contained therein. ? ?
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