sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 1 description applications the fundamental of sp6018 c synchronous rectifier (sr) driver ic is based on our u.s. patented methods that utilize the principle of prediction logic circuit. the ic deliberates previous cycle timing to control the sr in present cycle by predictive algorithm that makes adjustments to the turn - off time, in order to achieve maximum efficiency and avoid cross - conduction at the same time. specially, sp6018 c is designed for resonance. it also maintains the mosfets body diode conduct ion at minimum level. the sp6018 c is capable to adapt in almost all existing resonance converters with few adjustments considered necessary. ? servers & workstations ? storage area network power supplies ? telecommunication converters ? embedded systems ? industria l & commercial systems using high current processors features pin configuration (sop - 8) ? offers efficiency improvement over schottky diode (depends on drive configuration of the sr). ? drives all logic level power mosfet. ? prediction gate timing cont rol. ? minimum mosfet body diode conduction. ? operating frequency up to 400 khz. ? synchronize to transformer secondary voltage waveform. part marking
sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 2 typical applcation circuit pin description pin symbol description 1 timing discontinuous current filter timing adjustment re sistor connection. 2 pred capacitor to store previous cycle timing for sr mosfet. 3 vr v oltage reg u lato r . 4 adj trigger point adjustment for dynamic state. 5 gnd ground connection. 6 mosg - c catch mosfet gate drive. 7 vdd dc supply voltage. 8 sync sy nchronized signal from the v ds of sr mosfet.
sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 3 block diagram ordering information part number package part marking sp6018 c s8rgb sop - 8 sp6018 c sp6018 c s8tgb sop - 8 sp6018 c sp6018 c s8rgb : 7 tape reel ; pb C free ; halogen - free sp6018 c s8tgb : tube ; pb C free ; halogen - free absoulte maximum ratings (ta=25 , unless otherwise specified.) the following ratings designate persistent limits beyond which damage to the devic e may occur . symbol parameter value unit v dd dc supp l y v oltage 16 v i out peak source current (pulsed) 1 . 5 a peak sink current (pulsed) 1 . 5 a p d power dissipation @ t a =85 (*) 0.25 w t j operating junction temperature range - 25 to1 0 5 t stg storage te mperature range - 40 to 150 t lead lead soldering temperature for 5 sec. 260
sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 4 thermal resistance symbol parameter value unit r ? jc thermal resistance junction C case (*) 45 /w (*) the power dissipation and thermal resistance are evaluated under copp er board mounted with free air conditions. electrical characteristics (t a =25 , v d d =12 v , freq. =50 khz, duty cycle=50%, unless otherwise specified.) symbol parameter conditions min. typ. max. unit supply input i dd supply current no load 4 7 .5 ma v syn c =0 v , n o l o ad 5 8 .5 ma vdd supply voltage idd peak < 1.5 a 16 v vdd on enable voltage 9. 2 10.0 10.5 v sync reference (sync) vshth sync high threshold 3.5 3.9 v vslth sync low threshold 0.9 1.2 v vsync sync clamp voltage isync=3ma 5 7 v isync sync input current 3 ma voltage regulator reference (vr) i vr vr output current 20 ma on time duty setup ( pin 6 ) t on - time 19 20 us mosfet gate driver (mosg - c) voh output high voltage io = - 200ma 10.5 11.0 v vol output low voltage io = 20 0ma 0.5 0.8 v td propagation delay no load 50 80 ns tpred no load 120 ns tr rise time load = 1nf (*) 10 25 ns tf fall time load = 1nf (*) 10 25 ns dynamic protect dt dynamic variable pin 4 open 600 ns ton - min mosg - c on time pwm adjusts time > dt 1 us (*) tr & tf are measured among 10% and 90% of starting and final voltage.
sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 5 performance characteristics (t a =25 , unless otherwise specified.) *fig. 1 : no load ; no sync *fig. 4~5 : frequency = 65 khz.
sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 6 sop - 8 package outline
sp6 018 c synchronous rectifier driver 201 5 /0 4 /1 0 ver. 1 page 7 information provided is alleged to be exact and consistent . sync power corporation presumes no responsibility for the penalties of use of such information or for any violation of patents or other rights of third parties, which may result from its use. no license is granted by allegation or otherwise under any pat ent or patent rights of sync power corporation. conditions mentioned in this publication are subject to change without notice. this publication surpasses and replaces all information previously supplied. sync power corporation products are not authorized f or use as critical components in life support devices or systems without express written approval of sync power corporation. ? the sync power logo is a registered trademark of sync power corporation ? 20 15 sync power corporation C printed in taiwan C all ri ghts reserved sync power corporation 7f - 2, no.3 - 1, park street nankang district (nksp), taipei, taiwan, 115, r.o.c phone: 886 - 2 - 2655 - 8178 fax: 886 - 2 - 2655 - 8468 http://www.syncpower.com
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