refer to applications notes pa-1 rev.: 0/2015 www.recom-international.com dc/dc converter 3 y e a r w a r r a n t y 3 specifcations (measured at t a = 25c, full load, nominal input voltage and after warm-up) basic characteristics parameter condition min. typ. max. input voltage range 6.5vdc 24vdc 32vdc output current (2) 6ma 500ma quiescent current 0% load 5ma 7ma switching frequency 280khz 330khz 380khz effciency see selection guide internal power dissipation 0.4w output ripple and noise 20mhz bw limited 50mvp-p 75mvp-p description the r-78w series offers wired 0.5a switching regulators which are ideally suited to offer a stable voltage supply without the need for a pcb for applications like high power led lighting, battery powered systems, cooling systems, or fans. due to the high effciencies of up to 96% there is no need for a heat sink. the compact modules feature fully protected outputs and draw only 1ma under no load conditions. features switching regulator ? effciency up to 96%, no need for heatsinks! ? build-in diode protection circuit ? low profe (lxwxh= 11.5 x 8.5 x 17.5mm) ? continuous short circuit protection ? rohs compliant ? iec/en-60950 certifed 0.5 amp sip3 single output r-78w-0.5 selection guide part input output output effciency max. capacitive number voltage range voltage current @ min. vin load (1) (vdc) (vdc) (ma) (%) ( f) r-78w3.3-0.5 6.5 - 32 3.3 500 88 220 r-78w5.0-0.5 6.5 - 32 5.0 500 93 220 r-78w9.0-0.5 11 - 32 9.0 500 95 220 r-78w12-0.5 15 - 32 12.0 500 96 220 notes: note2: operation under no load will not damage the device, however they may not meet all specifcations. a minimum load of 6ma is recommended. notes: note1: 6800f with <1sec start-up time regulations parameter condition type value output voltage accuracy all models 2% typ. / 3% max. line voltage regulation low line to high line, full load 3.3v, 5v 9v, 12v 0.2% typ. / 0.4% max. 0.1% typ. / 0.2% max. load voltage regulation 10% to 100% load 3.3v, 5v 9v, 12v 0.4% typ. / 0.6% max. 0.25% typ. / 0.4% max. transient response 50% - 100% load, io/t 25ma/s 10% - 100% load, io/t 25ma/s all models 75mv typ. 100mv max. iec-60950-1 certifed en-60950-1 certifed
protections parameter type value short circuit protection (scp) continuous, automatic recovery pa-2 rev.: 0/2015 www.recom-international.com dc/dc converter environmental parameter condition value operating temperature range with derating -40c to +85c maximum case temperature +100c storage temperature range -55c to +125c temperature coeffcient -40c to +85c ambient 0.015%/c thermal impedance surface of case 70c/w typ. humidity non-condensing 95%, rh max. mtbf 9368 x 10 3 hours -40 60 70 71 80 85 90 100 50 40 30 20 10 0 -20 0 20 40 60 80 100 ambient temperature (c) output power (%) controlled ic +v in -v in +v out -v out derating graph reverse current protection: specifcations (measured at t a = 25c, full load, nominal input voltage and after warm-up) r-78w-0.5 series safety and certifications certifcate type report / file number standard iec general safety spclvd1407030-1 iec-60950-1, 2nd edition en general safety spclvd1407030-1 en-60950-1, 3rd edition an internal blocking diode can prevent reverse current fow backwards into the output, as this can damage the converter when it is powered down.
pa-3 rev.: 0/2015 www.recom-international.com dc/dc converter dimensions and physical characteristics parameter type value material case potting non-conductive black plastic ul94v-0, epoxy dimensions (lxwxh) 17.5 x 11.5 x 8.5mm weight 4.8g typ. packaging dimensions (lxwxh) cardboard box 140 x 130 x 65mm packaging quantity (3) cardboard box 25pcs. specifcations (measured at t a = 25c, full load, nominal input voltage and after warm-up) r-78w-0.5 series bottom view front 3 2 1 105.0 5 10.0 2 8.5 11.5 17.5 0.51 r-78w -xx0.5 xxxx mechanical dimensions (mm) the product information and specifcations are subject to change without prior notice. recom products are not authorized for use in safety-critical applications (such as life support) without recoms explicit written consent. a safety-critical application is defned as an application where a failure of a recom product may reasonably be expected to endanger or cause loss of life, infict bodily harm or damage property. the buyer shall indemnify and hold harmless recom, its affliated companies and its representatives against any damage claims in connection with the unauthorized use of recom products in such safety-critical applications. notes: note3: 5 bubble packs each containing 5pcs in a cardboard box. wired connections wired color type single 1, red ul-1430, awg#22 +vin 2, black ul-1430, awg#22 gnd 3, brown ul-1430, awg#22 +vout tolerance: 0.5mm
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