features wide-range mains operation oon-chipo 700v bvdss power mos 65khz internal oscillator 2.5v 2% internal reference standby mode for high efficiency at light load overcurrent and latched overvol- tage protection non dissipative built-in start-up cir- cuit on-chip soft start and thermal shutdown main applications wall plug power supply up to 15w ac-dc adaptors auxiliary power supply: - monitors (blue angel) - desktops/servers - fax, tv, laser printers - home appliances/lighting line card, dc-dc converters description the L6590 is a monolithic switching regulator de- signed in bcd off-line technology, able to op- erate with wide range input voltage and delivering an output power up to 13w. the internal switch. is implemented by a lateral high voltage power mosfet with an rdson of 13 w and a bvdss of 700v. the internal fixed oscillator frequency, non dissipative start up and the internal soft start sys- tem allow to minimize the components count. a 2.5v+/-2% internal reference in addition to a high gain error amplifier make the device suitable for low cost applications with primary control. internal protections like cycle by cycle current lim- iting, output overvoltage protection and thermal shutdown generate a 'robust' design solution. the device automatically reduces the frequency from 65khz to 22khz under light load conditions improving the efficiency. this is preliminary information on a new product now in development. details are subject to change without notice. may 1999 ? ac line 85v ac to 265v ac pwm L6590 d98in857 p o =15w supply & uvlo v ref over voltage osc 100khz 2.5v over current v ref + - + - + - drain v cc vfb vcomp gnd typical application circuit minidip so16w L6590 fully integrated power supply fips ? product preview 1/8
absolute maximum ratings symbol parameter value unit v ds drain source voltage 700 v i d drain current 0.7 a v cc supply voltage 18 v error amplifier output sink current 3 ma p tot power dissipation at t amb <50 c (minidip) 1 w t j junction operating temperature range -40 to 150 c t stg storage temperature -40 to 150 c thermal data symbol parameter minidip so16w unit r th j-amb thermal resistance junction to ambient free air 60 - c/w r th j-amb thermal resistance junction to ambient (*) 35 to 60 35 to 60 c/w (*) value depending from pcb copper areas and thikness. pins connection (top views) drain n.c. v cc vcomp 1 3 2 4 vfb gnd gnd gnd 8 7 6 5 d98in854a drain n.c. n.c. v cc enable vfb vcomp 1 3 2 4 5 6 7 pgnd pgnd pgnd pgnd pgnd pgnd pgnd 16 15 14 13 12 10 11 d98in855a sgnd 8 pgnd 9 minidip so16w electrical characteristics (t j = 0 to 105 c, v cc = 10v) power section symbol parameter test condition min. typ. max. unit bv dss drain source voltage i d = 500 m a 700 v i dss off state drain current v ds = 560v 500 m a r dson drain source on state resistance i d = 25ma; tj = 25 c1317 w tj = 125 c2635 w L6590 2/8
symbol parameter test condition min. typ. max. unit error amp section v fb input voltage tj = 25 c 2.45 2.5 2.55 v tj = 125 c 2.43 2.5 2.57 v i b input bias current -0.3 -1 m a avol 60 db b unity gain bandwidth 0.7 1 mhz svr supply voltage rejection 70 db i source output source current vcomp = 3.5v 0.5 1 ma v oh v out high i source = 0.5ma v fb = 2v 3.8 4.5 v v ol v out low i sink = 1ma v fb = 3v 1.0 v oscillator section f osc oscillator frequency tj = 25 c 586572khz 56 65 74 khz dmin min. duty cycle vcomp = 1v 0 % dmax max. duty cycle 66 70 74 % device operation section i op operating supply current 6 8 ma i psc peak start up current v cc = 0v 5 10 15 ma v z zener voltage 17 17.5 18 v v ddon start threshold voltage 14 14.5 15 v v ddoff min operating voltage after turn on 7 7.5 8 v soft start v ccss soft start threshold voltage 12 12.5 13 v circuit protections i lim pulse by pulse current limit di/dt = 0.2a/ m s 500 625 700 ma ovp over voltage protection 15 15.5 16 v t m internal masking time 120 ns stand by section i pksb current threshold for stand-by operation transition from 65khz to 22khz 70 ma f stb stand by frequency tj = 25 c 192327khz i pknor current threshold for normal operation transition from 22khz to 65khz 170 ma stand by current f sw = fstand-by 5 7.5 ma pn/off/brown -out v th on threshold voltage (device on) 2.425 2.5 2.575 v i hyst source current v pin =3v 305070 m a i off supply current in off condition v pin = 2v 0.5 ma i p source current v pin =2v 5 ma v cl on/off clamp pull-up voltage i sink = 0.5ma 5 5.5 6 v thermal shutdown (*) thermal shutdown 150 165 c hysteresis 40 c (*) parameter not tested in production. electrical characteristics (continued) L6590 3/8
application examples figure 1. ac-dc adaptor, auxiliary p.s. (isolated bias winding feedback) figure 2. high performance ac-dc converter. (secondary referenced optcoupler feedback) figure 3. high voltage dc-dc converter. ac line 85v ac to 265v ac L6590 d98in850 drain v cc vfb comp gnd wide range mains fully isolated solution minimum components count ac line 85v ac to 265v ac L6590 d98in851 drain v cc vfb comp gnd wide range mains fully isolated solution excellent output preci- sion and regulation not isolation minimum parts count excellent output precision step down or step up topologies L6590 d98in852 drain v cc vfb comp gnd L6590 4/8
application example (continued) figure 4. line card application. (isolated bias winding feedback) L6590 d98in853 drain v cc vfb comp gnd 0 -48v +5v -5v minimum components count fully isolated solution L6590 5/8
dim. mm inch min. typ. max. min. typ. max. a 2.35 2.65 0.093 0.104 a1 0.1 0.3 0.004 0.012 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.009 0.013 d 10.1 10.5 0.398 0.413 e 7.4 7.6 0.291 0.299 e 1.27 0.050 h 10 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 l 0.4 1.27 0.016 0.050 k0 (min.)8 (max.) hx 45 a e b d e a1 h l c k 16 1 8 9 so16 wide outline and mechanical data L6590 6/8
minidip dim. mm inch min. typ. max. min. typ. max. a 3.32 0.131 a1 0.51 0.020 b 1.15 1.65 0.045 0.065 b 0.356 0.55 0.014 0.022 b1 0.204 0.304 0.008 0.012 d 10.92 0.430 e 7.95 9.75 0.313 0.384 e 2.54 0.100 e3 7.62 0.300 e4 7.62 0.300 f 6.6 0.260 i 5.08 0.200 l 3.18 3.81 0.125 0.150 z 1.52 0.060 outline and mechanical data L6590 7/8
information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specification mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. the st logo is a registered trademark of stmicroelectronics ? 1999 stmicroelectronics printed in italy all rights reserved stmicroelectronics group of companies australia - brazil - china - finland - france - germany - hong kong - india - italy - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - u.s.a. http://www.st.com L6590 8/8
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