BL2514A USB dedicated charging port (DCP) controller BL2514A DESCRIPTION The BL 2514A is USB dedica ted c ha rging p ort (DCP) c on trollers . Applic ati ons incl ude ve hicle po we r ch arg e r, wall a dap te rs with USB DCP and o th er USB cha rge rs . The BL2514A con trolle r h as th e au to -de tec t fe atu re tha t moni to rs th e D+ a nd D– line vol tages of the USB c onnec to r, pro viding the corre ct elec trical s ignature s on the DP and D M pins fo r the c orrec t de te cti ons of c ompliant po rtable d e vices to fas t cha rge . These po rtable de vic es i nclude smart pho nes , 5-V table ts and pers onal media pla ye rs . The BL 2514A su ppo rt fi ve of the mos t com mon p ro tocol s: Divide r 3 (DCP Appl ying 2 .7V o n D+ Line a nd 2 .7V o n D– Line ) USB Batte ry Cha rgin g Spe cifica tion , Re vi sion 1 .2 (BC1 .2 ) Chinese Telecommun icatio ns Indu stry S ta ndard YD /T 1591 -2 00 9 1.2V on b o th D+ and D– lines FE ATURES In ac co rdanc e wi th U SB Ba ttery Ch arging Specifica tion , Re visio n 1 .2 (BC1 .2), suppo rt USB DCP D+ line s horte d to D - lin e. In ac co rdanc e wi th C hinese Tele communication s Indus try S tand ard YD/T 1591-2009 , su ppo rt S hort mode . ( s uppo rt D+ lin e sho rted to D- line) Support DCP appl yin g 2 .7 V on D + Line a nd 2 .7 V o n D– Li ne Support DCP appl yin g 1 .2V to the D + Line and 1.2V to th e D– L ine Automa tic s wi tching D+ Li ne and D - Line f or con nec ted d e vice s . Single USB po rt con troller. Ope ra tion vol ta ge ran ge f rom 4 .5V to 5 .5V APPLICATIONS USB ca r cha rge r AC-DC adap te r wi th USB port Othe r USB ch arg er www.belling.com.cn 1 V1.0 BL2514A BLOCK DI AGRAM PIN CONFIGURATI ON PIN DESCRIPTION No. Nam e Type 1 DP1 I/O 2 GND G 3 NC No Conne ct 4 NC 5 IN P 6 DM1 I/O No Conne ct Powe r suppl y. Co nne ct a c eramic c apaci to r wi th a value of 0.1 -µF o r grea te r f ro m th e IN pin to GND as close to the d e vic e as possibl e . Connec ted to the D+ or D– line of USB c on nec tor, p ro vi de the correc t voltage with a ttach ed po rtable eq ui pment for DCP dete c tion . www.belling.com.cn desc rip tion Connec ted to the D+ or D– line of USB c on nec tor, p ro vi de the correc t voltage with a ttach ed po rtable eq ui pment for DCP dete c tion . Gro und co nnec tio n 2 V1.0 BL2514A ABS OLUTE M AXIM UM R AT INGS * Over re commended ju nc tion tempe ra tu re ra nge , vol tages a re refe renc ed to GND (unle ss o therwise n oted) Charac te ristic Cond ition s Min . Max. -0. 3 7 -0. 3 5.8 -0. 3 5.8 Continuou s ou tpu t sou rce curre n t Opera ting ju nc tion te mpera tu re IN DP 1 outp u t voltage , D M1 o u tpu t voltage DP 1 inpu t vo lta ge, DM1 inpu t voltage DP 1 inpu t vo lta ge, DM1 inpu t voltage DP 1 outp u t voltage , D M1 o u tpu t voltage TJ Sto ra ge te mpe ra tu re ra nge Tstg Voltag e ra nge Continuou s ou tpu t sin k cu rren t ESD (h u man bod y mod e) Unit V 35 mA 35 mA -40 125 ℃ -65 150 ℃ 8000 V * S t r e s s e s b e y o n d t h o s e l i s t e d u n d e r A b s o l u t e M a xi m u m R a t i n g s m a y c a u s e p e r m a n e n t d a m a g e to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. THERMAL INFORMATION Thermal metrc Symbol DBV θJA 179.9 θJCtop 117.5 Junc tion -to -boa rd the rmal resi stance θJB 41.9 Junc tion -to -top cha ra cte ri za ti on pa rameter ψJT 17.2 Junc tion -to -boa rd ch arac te ri zati on pa ramete r ψJB 41.5 Junc tion -to -cas e (b ottom) the rmal re sis tan ce θJCbot N/A Junc tion -to -ambien t thermal re sis tan ce Junc tion -to -cas e (top ) thermal resis ta nce Unit ℃ /W RECOMM ENDED OPER AT IN G C ONDIT IONS Voltag es a re ref ere nc ed to GND (unle ss o therwise n oted), p osi ti ve cu rre nt are in to pins . Charac te ris tic Symbol Min. Max . Unit VIN 4.5 5.5 V DP1 da ta line in pu t v oltag e VDP1 0 5.5 V DM1 d ata line inpu t voltag e VDM1 0 5.5 V Continu ous sink or so urce curren t IDP1 ±10 mA Continu ous sink or so urce curren t IDM1 ±10 mA 125 ℃ Inpu t vol tage of IN Ope ra ting jun cti on te mpera ture www.belling.com.cn TJ 3 -40 V1.0 BL2514A ELECTRICAL CHARACTERISTICS Condition s a re –40 °C ≤ (T J = T A ) ≤ 125 °C, 4.5V ≤ V I N ≤ 5 .5V. Po siti ve cu rre n t are i nto pins . T ypical values are a t 25 °C. All vol ta ges are wi th resp ec t to GND (unle ss othe rwise n oted ). Charac te ristic S ymb o l Undervo lta ge L oc ko ut IN rising UV LO thresh old VUVLO voltage H yste re sis Supp ly Cu rre nt IN supp ly c urre nt I IN BC 1.2 DCP M ode (Sh o rt Mod e) RDPM_SHOR DP 1 and DM1 sho rting re sista nce T1 RDCHG_SHO Resistanc e b e tween DP 1/DM1 a nd GND RT1 Voltag e th re sh o ld on D P 1 VDPL_ TH_ D unde r wh ich the de vice E T AC H 1 goe s b ack to d ivide r mode VDPL_ TH_ D H yste re sis E T AC H _ H Y S Conditions Min . T yp. Max Unit 3.89 4.15 4.38 V 100 4.5 V ≤ V IN 155 231 µA 157 200 Ω 350 656 1150 kΩ 310 330 350 mV ≤ 5.5 V V D P 1 =0. 8V, I D M 1 = 1 mA V D P 1 =0.8 V mV 50 mV 1 Div ide r M ode DP 1 outp u t voltage DM1 ou tpu t vo ltag e DP 1 outp u t imped an ce DM1 ou tpu t impe dan ce 1.2 V/1. 2V Mod e DP 1 outp u t voltage DM1 ou tpu t vo ltag e DP 1 outp u t imped an ce DM1 ou tpu t impe dan ce VDP1_2.7V VDM1_2.7V RDP1_PAD1 RDM1_PAD1 V IN =5V V IN =5V I D P 1 = -5µA I D M 1 = -5µA 2.56 2.56 23.9 23.9 2.7 2.7 30 30 2.87 2.87 36.1 36.1 V V kΩ kΩ VDP1 VDM1 V IN =5V V IN =5V I D P 1 = -5µA I D M 1 = -5µA 1.11 1.11 79.9 79.9 1.2 1.2 102 102 1.29 1.29 130. 1 130. 1 V V kΩ kΩ RDP1_PAD1 RDM1_PAD1 * S pecified b y design . No t pro duc tion te ste d. APPLICATION SUMMARY OVERVIEW The follo win g o ve rvie w ref ere nces vari ous indus try s tanda rd s . It is al wa ys recommended to co n sult the la tes t s tand a rd to ens ure th e mos t recen t a nd acc ura te informati on . Recharg eable po rtabl e eq uipment req uire s an e xternal po we r so urce to c ha rge i ts batte ries . USB po rts are co n venie n t l oca ti ons for c ha rging be ca use of an a vail able 5-V po we r sou rce . Un ive rs all y ac cep ted s tandards a re requi red to en sure hos t an d www.belling.com.cn 4 V1.0 BL2514A client-si de de vi ces meet the p ower manag ement requi remen ts . Tradi tionall y, USB hos t ports followi ng the USB 2 .0 Specific a tion mus t p ro vide at l eas t 500 mA to down stre am clien t-si de d e vice s . B ecau se multiple USB de vices ca n be a ttache d to a single USB po rt th rou gh a bus -po we red hu b, i t is the respo nsibil ity of the clie n t-side de vice to ne go tia te th e po we r allo tmen t fro m th e hos t to guara n tee the to tal c urren t d raw does no t exceed 5 00 mA. In ge neral , ea ch USB de vice ca n sub seque ntl y requ es t more c urren t, which is g ran te d in s tep s of 100 mA up 5 00 mA to tal . The hos t ma y g ran t o r de ny th e re ques t ba sed on th e a vailabl e curren t. Addition all y, the su cc ess of the USB tec hn olog y mak es the micro-USB conne c tor a popula r choic e f or wa ll ada pter c ables . Thi s allo ws a portable d evi ce to cha rge f rom both a wall ad ap te r a nd USB po rt wi th onl y one conne c tor. One common diffic ulty ha s re sul ted from this. As USB cha rging has g ained pop ulari ty, the 5 00-mA minimum defined b y the USB 2 .0 Spe cifica tion o r 90 0 mA d efined in the USB 3.0 Specifica tio n, ha s become ins ufficien t fo r man y ha nds ets , tabl ets and pers onal media pla ye rs (PMP) whic h ha ve a hig her ra ted cha rgi ng curren t. W all adap te rs and c ar c ha rge rs ca n pro vide mu ch mo re cu r ren t than 500 mA o r 900 mA to fast c harge po rtable de vices . Se veral ne w s tan dards ha ve been in troduc ed defining pro toc ol hand shak ing methods tha t allo w h ost a nd clien t de vice s to a ck nowled ge and dra w addi tion al cu rre nt be yond the 5 00 mA (defined in the USB 2 .0 Spe cifica tion ) o r 900 mA (defined in th e USB 3 .0 Specifica ti on) minim um while us ing a single micro-USB inpu t co nn ector. The BL 2514A su ppo rt fou r of the mos t common p ro tocol s: USB Batte ry Cha rgin g Spe cifica tion , Re vi sion 1 .2 (BC1 .2 ) Chinese Telecommun icatio ns Indu stry S ta ndard YD /T 1591 -2 00 9 Divide r mode 1.2 Von b o th D+ and D– lines YD/T 1591 -200 9 i s a subse t of the BC1 .2 s pecifica tion s uppo rte d b y th e vas t majo rity of de vices tha t imple ment USB ch arging . Divide r and 1.2-V c ha rging s chemes a re suppo rted in de vices from s pecific ye t p op ular de vice mak ers . B C1.2 ha s th re e differen t po rt type s, li ste d as follo ws . Stand ard d owns tream po rt (SDP ) Charging d owns tream po rt (CDP) Dedicated cha rgin g p ort (DCP) www.belling.com.cn 5 V1.0 BL2514A The BC1 .2 Spe cifica ti on d efines a c harging po rt as a do wn s tre a m facing USB p ort tha t p ro vi des po we r f or cha rgin g po rtable equipment . Table1 sho ws diffe re nt po rt ope ra ting mod es acco rdin g to th e B C1.2 Specifi ca tion . Table1 . Ope ra tin g Mo des Table Port T yp t Supports USB2 .0 Communication SDP(USB2.0 ) SDP(USB3.0 ) CDP DCP Yes Yes Yes No Maximum Allo wable Curre n t Drawn b y Po rtable Equipment(A) 0.5 0.9 1.5 1.5 The BC1 .2 Spe cifica ti on d efines the p ro to c ol ne cess ary to allo w po rtable e quipmen t to de te rmine wha t typ e of po rt i t i s con nec ted to s o tha t it can al lot i ts maximum allowabl e cu rren t dra wn . The han d-shak in g p roc ess is two s tep s. Du ring s tep o ne , the p rimary de tec tion , the po rtable e quipment o utpu ts a nominal 0 .6 Vou tp ut o n its D+ lin e and reads th e vol ta ge inpu t on i ts D– line . The po rtabl e de vice co nclude s it is c onnec ted to a SDP if the vol tag e i s les s tha n the nominal da ta de te c t vol tage of 0.3 V . The po rtabl e d evi ce con clude s tha t it is co nnec ted to a C hargin g P ort if the D– vol tage is g rea te r tha n the n ominal d ata de tec t voltage of 0 .3V a nd le ss than 0 .8 V . The secon d s tep , the second ary de tec tion , is n eces sary for p ortable equipmen t to dete rmine be tween a CDP and a DCP. The portable de vice ou tpu ts a nominal 0 .6 V outp u t on its D– li ne and re ads the vol tage inpu t o n i ts D + line . The p orta ble de vi ce conclud es i t i s conn e cte d to a CDP if th e d ata line being remain s is le ss than the nominal da ta de tec t voltag e of 0.3 V. Th e portable de vice concl udes i t i s conn ec ted to a DCP if the da ta li ne b eing read is g rea te r than the nominal data de tec t vol ta ge of 0 .3 V and le ss tha n 0 .8 V . Dedica ted Charg ing Port (DCP) A dedi ca ted ch argi ng po rt (DCP) i s a do wn stream po rt on a de vi ce th at ou tpu ts powe r th rough a USB co nnec to r, bu t is no t ca pable of enume ra ti ng a downs tream de vice , which g ene ral ly allo ws porta ble de vi ces to fas t ch arg e a t thei r maximum ra ted cu rren t. A USB charger i s a de vic e with a DCP, s uch as a wall adap ter o r ca r powe r ada pter. A DCP is iden tifie d b y the elec tric al cha rac te ris tics of i ts da ta lines . The follo win g DCP id entific ati on ci rcui ts a re u suall y u sed to meet the ha ndsh ak ing dete c tions of diffe ren t po rtable de vice s. Short the D+ L ine to the D– L ine The USB BC1.2 S pec ificatio n and the Chin ese Telecom munica ti ons Indus try Stand ard YD /T 1591 -2009 define tha t the D+ a nd D– da ta lines should be s ho rted www.belling.com.cn 6 V1.0 BL2514A toge ther wi th a maxi mum serie s imped anc e of 20 0 Ω . Thi s is sh own in Figu re1 . Fig 1 . DC P Sho rt Mod e Divider 3 (DCP App lying 2 .7 V on D+ L in e and 2 .7 V on D– L ine) There is o ne cha rgin g s cheme for di vide r DCP. The Di vid er 3 c hargin g scheme is used for 12-W adapte rs , and a pplies 2 .7V on D + and D- lin es . Fi g 2. Di vid e r 3 DCP The BL 2514A is USB dedica ted c ha rging p ort (DCP) c on trollers . Applic ati ons incl ude ve hicle po we r ch arg e r, wall a dap te rs with USB DCP and o th er USB cha rge rs . The BL2514A con trolle rs has the au to -de te ct f eatu re tha t moni to rs the D + and D– line vol tages of the USB c onnec to r, pro viding the corre ct elec trical s ignature s on the DP and D M pins fo r the c orrec t de te cti ons of c ompliant po rtable d e vices to fas t cha rge . These po rtable de vic es i nclude smart pho nes , 5-V table ts and pers onal media pla ye rs . DCP Au to-De tec t The BL 2514A in teg ra te an au to-de tec t fea ture to su ppo rt di vide r mode , sho rt mode and 1 .2V / 1 .2Vmode s. If a di vid er de vice i s a tta ched , 2 .7V is a pplied to the DP pin and 2 .7V i s applie d to the DM pi n. www.belling.com.cn 7 V1.0 BL2514A F ig 3 . DCP Au to -De tec t Func tio nal Diagram Undervo ltag e Locko ut (UVLO) The u nde rvol tag e l oc k out (UVL O) ci rc uit di sables DP1and DM1 outp u t vol tage u ntil the inp u t vol tage rea ches the UVLO tu rn -o n th resh old . Built-in h ysteresis p re ven ts unwan ted oscill ati ons due to in pu t vol tage drop f rom la rge curre nt su rge s . The BL 2514A onl y provi de the co rrec t ele c trical sign a tures on the d a ta line of USB charger p ort and do no t p ro vid e a ny power fo r the VBUS. Divide M ode Sele ction o f 12 -W Charge r The BL 2514A p ro vid e one type of con nec ti ons be tween the DP pin a nd the DM pin and be tween the D+ data lin e and the D– data lin e of the USB connec to r fo r a 12 -W USB cha rge r Table2 Cha rg ing S cheme fo r 12 -W USB Charg ers USB Charg er Containin g Charging Schemes Typ e 12-W Divide r 3 2.7V on b o th D+ and D- Li nes BC1.2DCP www.belling.com.cn 8 V1.0 BL2514A Fig 4 . 12 -w USB Cha rge Ap plica tion La you t Guid e lin es Place th e BL2514A n ear the USB ou tpu t c onnec to r and pla ce th e 0 .1 -µF b ypass capaci to r nea r the IN pin . AP PLIC AT ION C IRCUIT www.belling.com.cn 9 V1.0 BL2514A CH AR ACTER IST ICS CURVES www.belling.com.cn 10 V1.0 BL2514A OUTLINE DRAWING Un it: mm SOT-23 -6 www.belling.com.cn 11 V1.0