the copyright and authority for the interpretation of the products are reserved by mornsun b_xt-w2r2 2013.03.01-a/0 page 1 of 4 b_xt-w2r2 series 0.25w, fixed input, isolated & unregulated single output patent protected rohs part number system B0505XT-W2R2 ratedpower ackagestyle p output voltage input voltage productseries features 1500vdc isolation efficiency up to 80% operating temperature range: -40 ~+105 ultra-low ripple & noise:10&20 mvp-p miniature smd package internal smd construction industry standard pinout applications the b_xt-w2r2 series are designed for application where isolated output is required from a distributed power system. these products apply to where: 1. input voltage variation 10%; 2. 1.5kvdc input and output isolation; 3. low ripple noise is not required. such as: digital circuits, low frequency analog circuits, and igbt power device driving circuits. selection guide input voltage(vdc) output current (ma) input current (ma)(typ.) model nominal (range) output voltage (vdc) max. min. @max. load @no load reflected ripple current (ma,typ.) max. capacitive load( f) efficiency (%, typ.) @max. load approval B0505XT-W2R2 5(4.5-5.5) 5 50 5 70 15 20 80 b1205xt-w2r2 5 50 5 40 80 b1212xt-w2r2 12(10.8-13.2) 12 21 2 40 10 5 220 80 input specifications item test conditions min. typ. max. unit 5vdc input -0.7 -- 9 input surge voltage (1 sec. max.) 12vdc input -0.7 -- 18 vdc input filter capacitance filter output specifications item test conditions min. typ. max. unit output voltage accuracy see tolerance envelope curve line regulation for vin change of 1% -- -- 1.2 5v output -- 12 15 load regulation 10% to 100% load 12v output -- 7 10 % temperature drift 100% load -- -- 0.03 %/ c ripple & noise* 20mhz bandwidth -- 10&20 -- mvp-p short circuit protection continuous, automatic recovery note:* ripple and noise tested with parallel cable method. see detailed operation instructions at dc-dc application notes. common specifications item test conditions min. typ. max. unit isolation voltage input-output, tested for 1 minute and leakage current less than 1 ma 1500 -- -- vdc isolation resistance input-output, test at 500vdc 1000 -- -- m isolation capacitance input-output,100khz/0.1v -- 20 -- pf switching frequency 100%load,nominal input -- nmm 300 khz mtbf mil-hdbk-217f@25 3500 -- -- k hours case material epoxy resin (ul94-v0) weight -- 1.5 -- g
the copyright and authority for the interpretation of the products are reserved by mornsun b_xt-w2r2 2013.03.01-a/0 page 2 of 4 environmental specifications item test conditions min. typ. max. unit storage humidity non condensing -- -- 95 % operating temperature power derating (above100 ) -40 -- 105 storage temperature coefficient -55 -- 125 temp. rise at full load ta=25 c -- 15 -- soldering temperature 1.5mm from case for 10 seconds -- -- 300 c cooling free air convection emc specifications ce cispr22/en55022 class b typical recommended circuit to figure1 emi re cispr22/en55022 class b typical recommended circuit to figure1 ems esd iec/en61000-4-2 contact 8kv perf. criteria b emi recommended circuit emi typical recommended circuit(class b : vin gnd +vo -vo (0v) eut load ldm c1 vin gnd (figure1) recommended external circuit parameters: vin(v) 5 12 c1 4.7 f /50v emi ldm 6.8 h product typical curve tolerance envelope curve +10% +5% 50 100 +2.5% -2.5% -7.5% rated output voltage o u t p u t v o l t a g e ( % ) a c c u r a c y output current percent(%) t y p i c a l l o a d l i n e 70 (nominal input voltage) 0 20 40 60 80 100 120 -40 0 40 80 105 120 o u t p u t p o w e r p e r c e n t ( % ) environment temp.() safe operating area temperature derating graph efficiency vs input voltage curve (full load) 50 55 60 65 70 75 80 85 90 95 100 4.64.74.84.955.15.25.35.45.5 input voltage(v) efficiency(%) B0505XT-W2R2 efficiency vs output load curve (vin=vin-nominal) 0 10 20 30 40 50 60 70 80 90 100 102030405060708090100 total output current (%) efficiency(%) B0505XT-W2R2 efficiency vs input voltage curve (full load) 50 55 60 65 70 75 80 85 90 95 100 11.0 11.4 11.6 11.8 12.0 12.2 12.4 12.6 12.8 13.2 input voltage(v) efficiency(%) b1205xt-w2r2 efficiency vs output load curve (vin=vin-nominal) 0 10 20 30 40 50 60 70 80 90 100 102030405060708090100 total output current (%) efficiency(%) b1205xt-w2r2
the copyright and authority for the interpretation of the products are reserved by mornsun b_xt-w2r2 2013.03.01-a/0 page 3 of 4 recommended reflow soldering profile refer to ipc/jedec j-std-020d standard, our products recommend reflow soldering profile as follows: 0 50 100 150 200 250 time (sec.) t e m p e r a t u r e ( ) peak.temp 245 (max.) 245 217 60 max (>217) sec note: the curve applies only to the hot air reflow soldering outline dimensions, recommended footprint & packaging
the copyright and authority for the interpretation of the products are reserved by mornsun b_xt-w2r2 2013.03.01-a/0 page 4 of 4 test configurations input reflected-ripple current test setup input reflected-ripple current is measured with an inductor lin and capacitor cin to simulate source impedance. dc cin lin dc load oscilloscope current probe lin(4.7 h) cin(220 f, esr < 1.0 at 100 khz) design considerations 1) requirement on output load to ensure this module can operate efficiently and reliably, during operation, the minimum output load could not be less than 10% of the full load . if the actual output power is very small, please connect a resistor with proper resistance at the output end in parallel to increase the load. 2) overload protection under normal operating conditions, the output circuit of these products has no protection against overload. the simplest method is to add a circuit breaker to the circuit. 3) recommended circuit if you want to further decrease the input/output ripple, an capacitor filtering network may be connected to the input and output ends of the dc/dc converter, see (figure 2). it should also be noted that the capacitance of filter capacitor must be pro per. if the capacitance is too big, a startup problem might arise. for every channel of output, provided the safe and reliable operation is ensured, the recommended capacitance of its filter capacitor sees (table 1). vin gnd +vo 0v dc cin dc cout (figure 2) external capacitor table (table 1) vin (vdc) cin ( f) vo (vdc) cout ( f) 5 4.7 5 10 12 2.2 12 2.2 4) output voltage regulation and over-voltage protection circuit the simplest device for output voltage regulation, over-voltage and over-current protection is a linear regulator and an capacitor filtering network with overheat protection that is connected to the input or output end in series (figure 3), the recommended capacitance of its filter capacitor sees (table 1) , linear regulator based on the actual voltage and current to reasonable selection. vin gnd 0v +vo dc dc reg reg (figure 3) 5) it is not recommended to increase the output power capability by connecting two or more converters in parallel. the product is not hot-swappable note: 1. operation under minimum load will not damage the converter; however, they may not meet all specifications. 2. max. capacitive load is tested at nominal input voltage and full load. 3. unless otherwise noted, all specifications are measured at ta=25 c, humidity<75%, nominal input voltage and rated output load. 4. in this datasheet, all test methods are based on our corporate standards. 5. all characteristics are for listed models, and non-standard models may perform differently.please contact our technical support for more detail. 6. please contact our technical support for any specific requirement. 7. specifications of this product are subject to changes 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: 86-20-38601850 fax:86-20-38601272 e-mail: info@mornsun.cn http://www.mornsun-power.com
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