201 6 / 3 / 0 3 v. 2 page 1 sp 6019 c synchronous rectifier driver description applications the fundamental of sp601 9 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. sp601 9 c is specially suitable for forward and dc/dc module . ? servers & workstations ? storage area network power supplies ? telecommunication converters ? embedded systems ? industrial & commercial systems using high current processors ? dc/dc power module features ? offers efficiency improvement over schottky diode (depends on drive configuration of the sr). ? drives all power mosfet. ? prediction gate timing control. ? minimum mosfet body diode conduction. ? operating at high switching frequency. ? synchronize to transformer secondary voltage waveform. ? linear setting of timing function. ? tdfn3x3 8lc p ackage d esign pin configuration (tdfn3x3 8lc) part marking
201 6 / 3 / 0 3 v. 2 page 2 sp 6019 c synchronous rectifier driver typical applcation circuit pin description pin symbol description 1 timing discontinuous current filter timing adjustment resistor connection. 2 pred capac itor to store previous cycle timing for sr mosfet. 3 vr voltage regulator. 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 synchronized signal from the v ds o f sr mosfet. 9 gnd ground, exposed pad
201 6 / 3 / 0 3 v. 2 page 3 sp 6019 c synchronous rectifier driver block diagram ordering information part number package part marking sp6019 c tdn8rgb tdfn3x3 - 8lc sp6019 c sp6019 c t d n 8rgb : tape reel ; pb C free ; halogen - free absoulte maximum ratings (ta=25 , unl ess otherwise specified.) the following ratings designate persistent limits beyond which damage to the device may occur . symbol parameter value unit v dd 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 (*) 1.8 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 thermal resistance symbol parameter value unit r ? jc thermal resistance junction C case (*) 8 /w (*) the power dissipation and thermal resistance are evaluated under copper board mounted with free air conditions.
201 6 / 3 / 0 3 v. 2 page 4 sp 6019 c synchronous rectifier driver electrical characteristics (t a =25 , v dd = 12 v, freq. = 5 0 khz, duty cycle=50%, unless otherwise specified.) symbol parameter condi tions min. typ. max. unit supply input i dd supply current v sync = 0 v , vdd o n 3 4 ma vdd supply voltage idd peak < 2a 16 v v dd on e nable voltage 7.8 8. 2 8.6 v v dd hy s teresis e nable voltage 0. 2 5 0. 5 v v ovp over voltage protection 15 .5 16 .5 17.5 v vovp hystersis 0. 3 v sync reference (sync) vshth sync high threshold 3.5 3.9 v vslth sync low threshold 0.9 1.2 v isync sync input current 3 ma voltage regulator reference ( vr ) vr voltage 5.2 5.4 v i vr vr output current 50 ma on ti me duty setup ( pin 6 ) t on - time 26 32 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 25 50 155 ns tpred no load 120 ns tr rise time lo ad = 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 0.5 us (*) tr & tf are measured among 10% and 90% of starting and final voltage.
201 6 / 3 / 0 3 v. 2 page 5 sp 6019 c synchronous rectifier driver performance characteristics (t a =25 , unless otherwise specified.) *fig. 1 : no load ; no sync *fig. 3 : frequency = 100 khz *fi g. 4 ~5 : frequency = 65 khz. *fig. 6 : the falling time of negative edge from 3 . 9v to 0.9v
201 6 / 3 / 0 3 v. 2 page 6 sp 6019 c synchronous rectifier driver tdfn3x3 - 8 lc package outline
201 6 / 3 / 0 3 v. 2 page 7 sp 6019 c synchronous rectifier driver information provided is alleged to be exact and consis tent. 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 patent 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 previo usly 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 c orporation ? 20 1 6 sync power corporation C printed in taiwan C all rights reserved sync power corporation 7 f - 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
|
