68 features ? compact full-mold package (equivalent to to220) ? high efficiency: 80 to 88% ? requires only 4 external components ? phase correction and output voltage adjustment performed internally ? built-in reference oscillator (60khz) ? built-in overcurrent and thermal protection circuits applications ? power supplies for telecommunication equipment ? onboard local power supplies lineup full-mold, separate excitation switching type unit v a c c si-8000e series si-8000e series symbol v in p d1 p d2 t j t stg r th(j-c) r th(j-a) unit v w w c c c/w c/w recommended operating conditions absolute maximum ratings ratings 43 14(with infinite heatsink) 1.5(without heatsink, stand-alone operation) +125 C 40 to +125 7.0 66.7 parameter dc input voltage power dissipation junction temperature storage temperature thermal resistance(junction to case) thermal resistance(junction to ambient air) part number si-8050e si-8090e si-8120e v o (v) 5.0 9.0 12.0 i o (a) 0.6 parameter dc input voltage range output current range operating junction temperature range operating temperature range symbol v in i o t jop t op ratings si-8050e si-8090e si-8120e 7 to 40 11 to 40 14 to 40 0 to 0.6 C 30 to +125 C 30 to +125
69 parameter output voltage efficiency switching frequency line regulation load regulation temperature coefficient of output voltage ripple rejection overcurrent protection starting current si-8000e series forming no. 1101 external dimensions symbol v o conditions conditions f conditions ? v oline conditions ? v oload conditions ? v o / ? t a r rej conditions i s1 conditions unit v % kh z mv mv mv/ c db a ratings si-8050e si-8090e si-8120e min. typ. max. min. typ. max. min. typ. max. 4.80 5.00 5.20 8.64 9.00 9.36 11.52 12.00 12.48 v in =20v, i o =0.3a v in =21v, i o =0.3a v in =24v, i o =0.3a 80 86 88 v in =20v, i o =0.3a v in =21v, i o =0.3a v in =24v, i o =0.3a 60 60 60 v in =20v, i o =0.3a v in =21v, i o =0.3a v in =24v, i o =0.3a 80 100 90 120 100 130 v in =10 to 30v, i o =0.3a v in =14 to 30v, i o =0.3a v in =17 to 30v, i o =0.3a 30 40 50 80 70 95 v in =20v, i o =0.1 to 0.4a v in =21v, i o =0.1 to 0.4a v in =24v, i o =0.1 to 0.4a 0.5 1.0 1.5 45 45 45 f=100 to 120h z f=100 to 120h z f=100 to 120h z 0.61 0.61 0.61 v in =10v v in =14v v in =17v electrical characteristics (t a =25 c) a. part number b. lot number pin arrangement q v in w sw out e gnd r v os t n.c plastic mold package type flammability: ul94v-0 weight: approx. 2.3g (unit: mm) 10.0 0.2 4.2 0.2 0.95 0.15 8.2 0.7 2.6 0.1 3.9 0.7 (4.3) (4.6) (8.0) (17.9) (2.0) 0.85 +0.2 C 0.1 0.45 +0.2 C 0.1 3.2 0.2 4.0 0.2 7.9 0.2 5.0 0.6 16.9 0.3 0.5 12345 p1.7 0.7 4=6.8 0.7 2.8 0.2 a b
70 block diagram standard external circuit t a -p d characteristics sw out v os v in 3 gnd 5 n.c 4 2 1 osc reg. ocp comp. reset drive tsd amp. v ref v in c 1 d 1 l 1 5v : 200 h 9v , 12v: 300 h 100 f v in v o ak06 gnd nc gnd gnd si-8000e sw out v os 1 2 3 + c2 330 f + 5 4 (sanken) 15 10 5 0 C 30 02550 ambient operating temperature t a ( c) power dissipation p d (w) 75 100 125 200 200 2mm (2.3 c/w) 100 100 2mm (5.2 c/w) 75 75 2mm (7.6 c/w) infinite heatsink without heatsink with silicon grease heatsink: aluminum si-8000e series selecting external components 1. inductor l 1 1) it must be suited for switching regulators. do not use inductors such as noise filters, because they generate excessive heat. 2) it must have the appropriate inductance value. if the inductance is too small (150 h or lower), abnormal oscillation may occur causing operation problems in the overcurrent protection circuit within the rated current range. 3) the rated current must be satisfied. if the rated current is exceeded, magnetic saturation leads to overcurrent. 2. capacitors c 1 and c 2 1) they must satisfy the breakdown voltage and allowable ripple current. exceeding the ratings of these capacitors or using them without derating shortens their service lives and may also cause abnorm al oscillation of the ic. 2) c 2 should a low-impedance type capacitor. a low-impedance type capacitor is recommended for c 2 to ensure reduced ripple voltage and stable switching operation. 3. diode d 1 the sanken ak06 diode is recommended for d 1 . if you intended to use an equivalent diode, be sure to use a schottky barrier diode and make sure that the reverse voltage applied to terminal 2 of the ic does not exceed the value ( C 1v) given in the absolute maximum ratings. if you use a fast recovery diode or any other diode, supplying a reverse voltage generated from the recovery or on voltage of the diode ma y damage the ic. application variable output voltage output voltage can be adjusted in the same way as si-8000s in page 77. the efficiency depends on the input voltage and the out- put current. thus, obtain the value from the efficiency graph on page 71 and substitute the percentage in the formula above. v o : output voltage v in : input voltage i o : output current x : efficiency (%) v f : diode forward voltage 0.4v(ak06) thermal design for d 1 must be considered separately. p d =v o ? i o 100 C 1 C v f ? i o 1 C v o ? v in
71 typical characteristics efficiency characteristics(si-8050e) output voltage(si-8050e) load regulation(si-8050e) overcurrent protection characteristics(si-8050e) temperature characteristics(si-8050e) thermal protection characteristics(si-8050e) 100 90 80 70 60 50 40 0 0 0.1 0.2 0.3 0.4 0.5 (t a =25 c) 0.6 output current i o (a) efficiency (%) v in =7v 10v 20v 30v 40v 5.2 5.1 5.0 4.9 4.8 0 0.1 0.2 0.3 0.4 0.5 0.6 output current i o (v) output voltage v o (v) 20v 10v 7v (t a =25 c) v in =40v 100 90 80 70 60 50 40 0 5.3 5.2 5.1 5.0 4.9 4.8 4.7 0 0 0 50 100 v o f 150 ambient temperature t a ( c) f (khz) output voltage v o (v) (v in =20v, i o =0.3a) (%) efficiency frequency 6 5 4 3 2 1 0 0 0.5 1.0 1.5 2.0 output current i o (v) output voltage v o (v) 20v (t a =25 c) v in =7v 40v si-8000e series note on thermal protection: the thermal protection circuit is intended for protection against heat during instantaneous short-circuiting. its operation is not guaran- teed for continuous heating condition such as short-circuiting over extended periods of time. 6 5 4 3 2 1 0 0246810 input voltage v in (v) output voltage v o (v) 0.3a 0.6a (t a =25 c) 0.1a i o = 0a 0 6 5 4 3 2 1 0 50 100 case temperature t c ( c) 150 200 v in =20v, i o =20ma output voltage v o (v)
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