shenzhen sunyuan technology co., ltd. exxxxd/s-1w series dc-dc converter copyright @ shenzhen sunyuan technology co., ltd. edition-szsy-07-01 printed in p.r.c january 2007 page 1 of 4 z rated 1w output z high power density z 7pin sip /14pin dip package z dual output z industrial standard pin-out z no heat sink required z 3kvac isolation z fixed input z unregulated output z pcb mounting electrical specifications all specifications tested typically @ 25c, humidity<75% , nominal input and rated output unless otherwise noted. output specifications items: testing condition min typ max output accuracy: at full load and nominal vin 5% output power: 0.1w 1w 1w line regulation: for vin change of 1% 1.2 load regulation: from 20% to full load 10% 15% ripple and noise: 20mhz bandwidth 150 mv p-p temperature drift: 0.02 %/c minimum load 10% switching frequency 100khz over load protection % of fl at nominal input 120 short circuit protection momentary input specifications items: testing condition min typ max 3.3 vdc nominal input 3-3.6 5 vdc nominal input 4.5-5.5 9 vdc nominal input 8.1-9.9 12vdc nominal input 10.8-13.2 15 vdc nominal input 13.5-16.5 input voltage range 24vdc nominal input 21.6-26.4
shenzhen sunyuan technology co., ltd. exxxxd/s-1w series dc-dc converter copyright @ shenzhen sunyuan technology co., ltd. edition-szsy-07-01 printed in p.r.c january 2007 page 2 of 4 common specifications items min typ. max operating temperature range -40c +85c storage temperature range -55c +125c humidity <90% cooling free air convection isolation voltage (vdc) input to output 1,000 isolation resistance (ohms) 10 9 isolation capacitance (pf) 30 efficiency (%) see product list 72 80 case material non-conductive black plastic potting material epoxy resin ul94-v0 packing material tube dimension (mm / inch) (l*w*h) sip: 19.5*6.00*9.50 (0.76*0.24*0.37) dip: 20.4*10*8.2(0.80*0.39*0.32) weight (g) 2 mtbf (hrs) >1,000,000 product list input voltage (vdc) output part number range nominal max. current (ma) voltage (vdc) efficiency (%, typ.) package capacitor load max (uf) e0505s/d-1w 4.5-5.5 5 5.5 100 5 71 sip/dip 4.7 e0512s/d-1w 4.5-5.5 5 5.5 42 12 80 sip/dip 1 e0515s/d-1w 4.5-5.5 5 5.5 34 15 80 sip/dip 0.47 e1205s/d-1w 10.8-13.2 12 13.2 100 5 80 sip/dip 4.7 e1212s/d-1w 10.8-13.2 12 13.2 42 12 78 sip/dip 1 e2403s/d-1w 21.6-26.4 24 26.4 150 3.3 75 sip/dip 4.7 e2405s/d-1w 21.6-26.4 24 26.4 100 5 74 sip/dip 4.7 e2412s/d-1w 21.6-26.4 24 26.4 42 12 76 sip/dip 1
shenzhen sunyuan technology co., ltd. exxxxd/s-1w series dc-dc converter copyright @ shenzhen sunyuan technology co., ltd. edition-szsy-07-01 printed in p.r.c january 2007 page 3 of 4 connecting dc-dc converters in series galvanic isolation of the output allows multiple converters to be connected in series simply by connecting the positive output of one converter to the negative of another (see figure 1). in this way, non-standard voltage rails can be generated, however, the current output of th e highest output voltage converter should not be exceeded. when converters are connected in series, additional filtering is strongly recommended as the converters switching circuits are not synchronized. as well as a summation of the ripple voltages, the output could also produce relatively large be at frequencies. a capacitor across the output will he lp, as will a series inductor. connecting dc-dc converters in parallel if the available power output from a single converter is inadequate for the application, then mu ltiple converters can be parall eled to produce a higher output power. however, it is not recommended to parallel converters to generate a high er power output, please select our higher power output modules or contact us fo r a customized solution. it should be noted that it is always pref erable to parallel multiple converters of th e same type. for instance, if a 2.5w conve rter is required, then either 2pcs axxxxs-2w should be used or 3 axxxxs-1w , not an axxxxs-2w and an axxxxs-1w . the reason for this is that the output voltages are not sufficiently well matched to guarantee that an axxxxs-2w would supply twice as much as an axxxxs-1w and the situation would occur where there was only 1w being drawn from the axxxxs-2w and 1.5w from axxxxs-1w . even with paralleled converters of the same type, loading will be uneven, however, there is only likely to be around a 10% differen ce in output load when the output voltages are well matched. when connecting converter outputs, it should be remembered that the switching will not be synchronous, hence some form of coupl ing should be employed. one possible solution is to use a diode feed, this is suitable mainly for 12v and 15v output types only where the dio de voltage drop (typically 0.6v) will not significantly af fect the circuit functionality (see figure 2). with 5v and 9v supplies the diode drop is generally too large to consider as a suitable means of connecting paralleled converters. this method also has a beat frequency that will superimpose i tself over the ripple of the two converters, this can be reduced by using an external capacitor at the para lleled output. the preferred method of connec ting converters in parallel is via series inductors on the ou tput (see figure 3). this configuration no t only has a lower loss of voltage than the diode method, but by suitable choice of inductor and an additional external capacitor, the beat frequency can be significantly reduced, as will the ripple from each converter. suitable values are given in the table below (see table 1), thes e typically reduce the beat and ripple frequencies by a factor of 10. isolation one of the main features of the majority of sunyuan component s dc-dc converters is the high ga lvanic isolation capability. this allows several variations on circuit topography by using a single dc-dc converter. the basic input to output isolation can be used to provide either a simple isolated output power source, or to generate differ ent voltage rails and /or dual polarity rails . these configurations are most often fo und in data processing, instrumentation and other noise sensitive circuits where it is n ecessary to isolate the load and noise presented to the local p ower supply rails from that of an entire system. usually loca l supply noise appears as common mode noise at the converter a nd does not pollute the main sys tem power supply rails. the isolated positive output can be conn ected to the input ground rail to generate a negative supply rail if required. s ince the output is isolated from the input the choice of reference for the output side can be relatively arbitrary, for example an additional single rail can be generated above the main supply rail or offset by some other dc value. regulated converters need more consideration than the unregulat ed type for mixing the reference level. essentially the single s upply rail has a regulator in its positive output rail only, hence referring the isol ated ground will only work if all the current return is thr ough the dc-dc and not via other external components, such as diode bi as, resistor feed. have an alternative re turn path can upset the regulation and the performance of the system may not equal that of the converter. in one word, the isol ation features are to generate two completely independent powe r supply but also united perfectly through the modern technology. this has been widely used in the app lication of mixed circuits, a/d, d/a and ot her circuits that are sensitive to noise. filtering all sunyuan isolated dc-dc converters have a fixed characterist ic frequency at which the devi ce operates. this fixed frequency allows filtering that is relatively simple compared to pulse-skipping types. in a pul se-skipping converter a large range of frequencies are encounter ed as the device adjusts the pulse interval for loading conditions.
shenzhen sunyuan technology co., ltd. exxxxd/s-1w series dc-dc converter copyright @ shenzhen sunyuan technology co., ltd. edition-szsy-07-01 printed in p.r.c january 2007 page 4 of 4 nomenclature temperature derating graph 120 100 80 60 40 20 0 -40 0407185120 safe operating area o utput power % operating temp (celsius) typical connection -vin cin dc-dc converter +vo -vo 0v +vin c out2 outline dimension pins description sip connection dip 1 +vin input 14 2 gnd input 1 5 -vo output 10 6 0v common 9 7 +vo output 8 nc 7 shenzhen sunyuan technology co., ltd. 3f, 3bldg, duoli industrial zone, meihua rd. futian district, shenzhen 518049, china tel: +86-755-83100080 fax: +86-755-83116652 email: info@szsunyuan.com www.szsunyuan.com
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