to-220f-7 str-y6400 series power ic for quasi-resonant type switching power su pply with high efficiency, low noise and low standby pow er in full load range general descriptions the str-y6400 series products are power ics for qua si-resonant switching type power supplies, incorporating a power mosfet and a contro ller ic. the product achieves high efficiency and low noise power supply systems acros s the full load range, by the low standby power, the quasi-resonant operation, the bottom-ski p quasi-resonant operation, and the burst-oscillation. the str-l6400 series products are the different pac kage (sip-10) versions. features multi-mode control the operation mode switching with four steps accord ing to load conditions achieves the optimal high ef ficiency and low noise power supply systems across the full load range. ? in standby: auto standby (auto burst-oscillation) ? under low to middle load conditions: 1 or 2 bottom- skip quasi-resonant operation (bottom-skip qr) ? under middle to rating (or heavy) load conditions: quasi-resonant operation (qr) current-mode control bottom-skip function with delay time setting, enabl ing stable switching built-in startup circuit, enabling low power consum ption auto-standby function with burst-oscillation, enabl ing low standby power(input power p in < 100mw at no load) soft-on function, preventing the audible noise from transformer, during the standby operation (burst-o scillation) and the dynamic load change. soft-start function step-drive function, reducing switching noise leading edge blanking function external on/off function built-in avalanche energy guaranteed high-voltage p ower mosfet various protections overcurrent protection (ocp)-------- pulse-by-pulse with ac input compensation function overload protection (olp) ----------- latch shutdown or auto-restart option by changing external compone nts overvoltage protection (ovp) ------- latch shutdown applications switching power supplies for digital consumer equipment; lcd-tvs, bd/dvd players /recorders, etc., home appliance (white goods), oa equipments, industry machines, communication dev ices, others product lineup product no. mosfet v dss (min) (v) r ds(on) (max) ( ) str-y6453 1.8 str-y6456 650 0.73 str-y6473 3.6 str-y6476 850 1.3 free datasheet http:///
sanken electric co.,ltd. warning the contents in this document are subject to change s, for improvement and other purposes, without noti ce. make sure that this is the latest version of the do cument before use. the operation and circuit examples in this document are provided for reference purposes only. sanken a ssumes no liability for violation of industrial pro perty, intellectual property, or other rights of sanken or third parties, that stem from these examp les. the user must take responsibility for considering a nd determining which objects the products in this d ocument are used with. although sanken will continue to improve the qualit y and reliability of its products, semiconductor products, by their nature, have certa in fault and failure rates. the user must take resp onsibility for designing and checking to secure the device and system so that a part failure may not l ead to human injury, fire, damages, or other losses. the contents in this document must not be transcrib ed or copied without sankens written consent. 0 10 20 30 40 50 60 70 80 90 100 0.0 1.0 2.0 3.0 4.0 5.0 po popo po[ [[ [w ww w] ]] ] ? [%] [%] [%] [%] ac120v str-y6476 ac230v str-y6476 ac120v M? ac230v M? 0 10 20 30 40 50 60 70 80 90 100 0 5 10 15 20 25 30 po popo po[ [[ [w ww w] ]] ] ? [%] [%] [%] [%] ac120v str-y6476 ac230v str-y6476 ac120v M? ac230v M? output power p out (w) output power p out (w) efficiency improve- ment efficiency (%) efficiency improve- ment efficiency (%) qr qr qr qr 120vac str-y6476 230vac str-y6476 120vac qr 230vac qr 120vac str-y6476 230vac str-y6476 120vac qr 230vac qr typical application circuit typical operation waveforms & typical electrical ch aracteristics operation mode transitions efficiency comparison of multi mode vs. quasi-reson ant mode c cc co oo on nn nt tt t 1 11 1 3 33 3 2 22 2 6 66 6 7 77 7 4 44 4 5 55 5 s ss st tt tr rr r- -- -y yy y6 66 64 44 40 00 00 00 0 d dd d/ // /s ss st tt ta aa ar rr rt tt tu uu up pp p v vv vc cc cc cc c b bb bd dd d f ff fb bb b a aa ad dd dj jj j o oo oc cc cp pp p s ss s/ // /g gg gn nn nd dd d v vv v o oo ou uu ut tt t g gg gn nn nd dd d v vv va aa ac cc c minimum load maximum load standby 2 bottom-skip 1 bot tom-skip quasi-resonant (burst-oscillation) i d v ds free datasheet http:///
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