shen zhen strong link electronics l y 9523/l y 9525/l y 9526/l y 9527/l y 9528 maike electronic (hk) co,.ltd. ly-doc9 5 2 x rev:2.1 feb..2011 www . maike-tech.com 1/7 current mode pwm controller with integrated high voltage power mosfet LY9523/ly9525/ly9526/ly9527/ly9528 gene r al description l y 952 3/l y 952 5/l y 95 26/l y 95 27 /l y9528 combines a dedicate d curre nt mode pw m controller with integr ated hig h voltag e po wer mosfet. vcc low startup cur r ent and lo w ope ratin g current contribute to a reliable power on startup design with LY9523/ly9525/ly9526/ly9527/ ly95 28 . the ic operates in extend ed ?burst mod e ? to minimize switching loss. low er standb y po we r and hi gh er conve r sion efficiency is thus achieved. dip8-300-2.54 l y 952 3/l y 952 5/l y 95 26/l y 95 27 /l y9528 o perat es in the fixed p w m freque ncy ,the frequ ency is 65khz. excellent emi perfor m ance is achieve d wi th prop riet ary fre q u e n cy huffling echnique. soft start with 4ms,l y 9523/l y 9 525/l y 9 5 2 6 /l y952 7/ l y 952 8 offers complete protection cover age with autom atic self-reco ver y fea t ure includ ing vcc over volta ge clamp and unde r volt age lockou t (uvlo), ove r volta ge pr otection(o l p),o ver cur r en t protection (ocp).l y 9 523/l y 9 5 2 5 /l y952 6/ l y 952 7/l y 952 8 is offered i n dip-8 package. feat u r e s z integrate d high volta ge po wer mosfet z low vcc startup current(5 a) z ?no y-cap?system design in sub 20w range z frequency shuffling for emi z over current protection(ocp),over voltage protection(ovp) z uvlo and auto self- recovery z soft start with 4ms z burst mode z cycle- by- c ycle ove r-curr ent limiting z otp maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. http://
shen zhen strong link electronics l y 9523/l y 9525/l y 9526/l y 9527/l y 9528 applications z dvd/dvb/set-top b o x power supplies z offline ac/dc flyb a ck conve r ter z battery charger z open-frame smps block diagram d1 q1 q2 d2 r2 r3 r1 internal uvlo vcc clamp frequency osc green burst mode olp del a y 68m s - + vth - + slope compensation s r q q dri v er ___ pw m leb soft ocp start vcc fb vcc_g sense gnd 5v bias jitter compensation mode q3 drain otp pin connection maike electronic (hk) co,.ltd. ly-doc9 5 2 x rev:2.1 feb..2011 www.maike-tech.com 2/7 maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd.
shen zhen strong link electronics l y 9523/l y 9525/l y 9526/l y 9527/l y 9528 maike electronic (hk) co,.ltd. ly-doc9 5 2 x rev:2.1 feb..2011 www.maike-tech.com 3/7 pin descriptions pin no. pin name descriptions 1 gnd ground 2 vcc-g power supply speciall y for internal gate driver 3 vcc power supply pin 4 fb feedback input pin 5 sense current s ense input pin 6 7 8 drain the drain pin is designed to connect directly to th e primary lead of the transforme r and is capable of switching a ma ximu m of 650v output power tabl e 190v 260v 85v 26 5v name adapting opening adapting opening LY9523 6w 8w 5w 7w ly9525 10w 14w 8w 12w ly9526 20w 24w 15w 20w ly9527 22w 28w 20w 24w ly9528 24w 30w 24w 28w absolute maxi mum ratings (t a=25 ) characteristics symbol value unit drain input voltage v drain 650 v vcc-g voltage v gs 20 v LY9523 i d 0.80 a ly9525 i d 1.0 a ly9526 i d 2.0 a ly9527 i d 3.0 a vcc zener clamp continuous current ly9528 i d 4.0 a power supply v o lt age v vcc 25 v v fb maximum input voltage -0.3 ~ 7.0 v maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd. maike electronic (hongkong)co,.ltd.
|
