2013/12/12 v.1 page 1 sp6018e synchronous rectifier driver description applications the fundamental of sp6018e synchronous rectifier (sr) driver ic is based on our u.s. patented methods that ut ilize 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, sp6018e is designed for resonance. it also maintains the mosfet?s body diode conduction at minimum level. the sp6018e is capable to adapt in almost all existing resonance converters with few adjustments considered necessary. ? switching mode power supply ? storage area network power supplies ? telecommunication converters ? embedded systems ? industrial & commercial systems using high current processors ? power converters to meet lot 6 requirement features pin configuration (sop-8) ? offers efficiency improvement over schottky diode (depends on drive configuration of the sr). ? low standby power to meet doe lot 6 requirement. ? prediction gate timing control. ? minimum mosfet body diode conduction. ? operating frequency up to 400 khz. ? synchronize to transformer secondary voltage waveform. ? internal over voltage protection part marking
2013/12/12 v.1 page 2 sp6018e synchronous rectifier driver typical applcation circuit pin description pin symbol description 1 timing discontinuous current filter timi ng adjustment resistor connection. 2 pred capacitor to store previous cycle timing for sr mosfet. 3 vr voltage regulator. 4 adj trigger point adjust ment for dynamic state. 5 gnd ground connection. 6 mosg-c catch mosfet gate drive. 7 vdd dc supply voltage. 8 sync synchronized signal from the v ds of sr mosfet.
2013/12/12 v.1 page 3 sp6018e synchronous rectifier driver block diagram ordering information part number package part marking SP6018ES8RGB sop-8 sp6018e sp6018es8tgb sop-8 sp6018e SP6018ES8RGB : tape reel ; pb ? free ; halogen - free sp6018es8tgb : tube ; pb ? free ; halogen - free absoulte maximum ratings (ta=25 , unless otherwise specified.) the following ratings designate persistent limits beyond which damage to the device may occur . symbol parameter value unit v d d dc supply voltage 16 v i out peak source current (pulsed) 2.0 a peak sink current (pulsed) 2.0 a p d power dissipation @ t a =85 (*) 0.25 w t j operating junction temperature range -40 to125 t stg storage temperature range -40 to 150 t lead lead soldering temperature for 5 sec. 260
2013/12/12 v.1 page 4 sp6018e synchronous rectifier driver thermal resistance symbol parameter value unit r ? jc thermal resistance junction ? case (*) 45 /w (*) the power dissipation and thermal resistance are evalua ted under copper board mounted with free air conditions. electrical characteristics (t a =25 , v dd =12v, freq. =50 khz, duty cycle=50%, unless otherwise specified.) symbol parameter conditions min. typ. max. unit supply input i dd supply current sleep mode 0.15 ma v sync =0v, vdd on 3 4 ma vdd supply voltage idd peak < 2a 16 v vdd on enable voltage 9 10 11 v vdd hysteresis hysteresis voltage of supply voltage 0.7 v vovp over voltage protection 15 16 v vovp hysteresis hysteresis voltage of ovp 1.2 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 10 16 v isync sync input current 3 ma voltage regulator reference (vr) v r reference voltage 5.2 5.4 v 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 = 200ma 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% an d 90% of starting and final voltage.
2013/12/12 v.1 page 5 sp6018e synchronous rectifier driver performance characteristics (t a =25 , unless otherwise specified.) figure 1: supply current vs supply voltage 0 2 4 6 8 10 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 vdd(v) idd(ma) figure 2: vr voltage vs supply voltage 0 1 2 3 4 5 6 7 8 12345678910111213141516 vdd(v) vr(v) figure 3: tpred vs cpred 100 200 300 400 500 600 700 800 900 1000 1100 1200 0 20406080100 cpred(pf) tpred(ns) figure 4: dynamic time vs c adj (pf) 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 0 20 40 60 80 100 120 140 160 c adj (pf) tfull time (ns) figure 5: output fall time vs load capacitor 0 10 20 30 40 50 60 70 80 90 100 0 1000 2000 3000 4000 5000 6000 7000 8000 c load(pf) tfull time (ns) figure 6: output rise time vs load capacitor 0 10 20 30 40 50 60 70 80 90 0 1000 2000 3000 4000 5000 6000 7000 8000 c load(pf) trise time (ns) *fig. 1 : no load ; no sync *fig. 3 : frequency = 100 khz *fig. 4~5 : frequency = 65 khz.
2013/12/12 v.1 page 6 sp6018e synchronous rectifier driver sop- 8 package outline
2013/12/12 v.1 page 7 sp6018e synchronous rectifier driver 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 pa tents or other rights of third parties, which may result from it s use. no license is granted by allegation or otherwise under any pate nt or patent rights of sync power corporation. conditions mentioned in this publication ar e subject to change without notice. this p ublication surpasses and replaces all information previously supplied. sync power corporation products are not authorized for 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 ?2013 sync power corporation ? printed in taiwan ? all rights 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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