Laptop Repair Part 1 OCR

m10-47 PQ52 1tJ& 0010-48 :Itlliit~ Figure 10-47 PQ52 circuit Figure 10-48 partial pressure calculation ~r *j1zp7tfJT~=:1-~1tj:: i¥.~IT~¥{hJt7ejTn:f,CflDei:t.'~sJ+UtVS. aHn21a89lyV*siIs§'f.Jt-hfVe\"sAePt~Uhj:r2eJ:e conditions: ~I1J,OO~10~-4P9UJi2JT,7FP' U~2~-I*1J-mPJ37mTIlmlpiXf=;~7+7V1H-218I. (P2805MF), PDO JU+VAD 37tffp,X:J}])§, ~Jt7ni~tI:l6251ACIN. Condition CD:+VH28 comes from PU2(p2805MF),is shown in figure 10-29,this is the boost chip with internal integrated the boost circuit.VA of 19V through PDO to +VAD_l,supplies to PU2,PU2 internal boost produces +VH28.When the boost is successful,the chip open drain output 6251ACIN. - ..,IQ 1 1 ~{tj:®: ACOK#E8 ISL6251l'ro A Conduction ®:ACOK# comes frO .VA ....... .YAO' -..... -.4 -.' -234- Scanned by CamScanner

Figure 10-50 the origin of ACOKH tro.llc.¥JlIfiiJ~[l ACPRN A~5IJ]EjJ1.E)(; Open-drain output signals AC adapter is pUlls low when ACSET is higher than 1.26V; and pulled high when ACSET is the data manual of ISL625I ,the pin definition of ACPRN:Open-drain output ris present. ACPRN pulls low when ACSET is higher than 1.26V; and pulled high 1 lower than 1.26V. *7-~CSET 1.26V, ACPRN fJ.ttiL1r£; 3 ACSET 1r£r 1.26V. ACPRN *ltJiiGJo O*:ar~fl:I:l, +VA ~2ii poo f=~+YAO_l. -a~~rl PDI ~f?i lSL625I OJ OCJN ~P1U35, PR236 *lli~f?i ACSET. ISL625I r~~IJ OCIN j5}A YDO fJl:Wfritrtl:l ~,at~ S.07V (A~ffi), ~D 00 10-51 Mij; 0 o-50+VA produces +YAO_I through PO-,and supplies the power to OCIN of otberpath is to through PR235,PR236 partial pressure to ACSET.ISL625I VDD after receiving OClN,the voltage is 5.07V(the typical value).is V I4.925 5.075 5.225 _ electrical characteristic about VDD output threshold value in Scanned by CamScanner

00 10-49, 00 10-59 9='~~. CSET JJ!4Ju~ 6251A IN {;; ~}lfiJlI1ii~fIJftlli~Jt PU2 O~ PG. tm~ PU2 Jffj~fi.tI:hfl-ffi, 6251ACIN f5J~~WU.!L{~o ) (According to the figure J0-49.figure J0-59.6251 ACIN ignal of ACSET pin connected to the PG of the boost chip PU2 ifPU2 does not succeed in boosting.6251 ACIN will also be pulled low.) ~f!j:@: ACOK_IN it~f1J PQ9 • .(mOO 10-54 JiJT~o ~{Bf!·iHg: ACOKJN /f~j~J:t!!.. PQ9 ~,@f~Jt. W~!.1Z·@f~f~1f!3f1¥.J O/C#o Condition ®:ACOK_IN connects to PQ9,is shown in figure 10-54.To keep ACOK_IN not grOlmded.PQ9 must be cut ofIthen there must have the low level ofO/C#. Figure 10-54 ACOK_IN connection circuit D/C#*§r EC. ~lloo 10--55 J:i)j/J • 1£~~,Sjfwn=~z.iW. M=m;c::JttIJ/f'I{'F, EC ~lf ~1I, ill/f~I{'F, .Ptr~ DIC#/f'~;Ig~Et!.3f; 1£ EC ~JU~If!)§. EC !.1Z\\~~~~¥U~nGMtE (ACIN~~). /f~{mDIC#73f~o ~.Ec~J~E., O/C#~~EC.~o D/C# comes from ECJs shown in figure lo-S5 beforeitbe common point produced,the standby chip is not working,EC has not voltage,and is also not will not be high Jevel;after EC getting the power supply,EC must detect that the adapter . will keep O/C to be 10w.lfEC is not detected the adapter,D/C# wiJI be set high by ii5: !!C ~ U'/O MY1 MY2 IIY3 MY4 IoIY5 MYlI MY7 MYlI MYlI MY10 MY11 MY12 MY1 MY14 ::7 AON -236- Scanned by CamScanner

gtIl't 10-55 the srcen-hOI of D/C# and ACI of EC *-~~IJ 00PR1804-,56PRr81T55)Ft,)£1l\\;f,r,:.!1;~:p:AnCj INAC~gO- KEC# N11il=JuJgP~Q~1;0m~-Bf:~ir1-l5,.re ~~~l\"':VDD_1*ii1estsignaI ofEC is shovm in figure IO-56,ACOK# with low level controls PQIO to ACOK,then through PR84,PR85 partial pressure,produces ACIN to AC 'ISLG251 VDD POlO OOTA124EU....1-F Scanned by CamScanner

!ti ilJ a~ t£.33-;fo atIt ~t ~ :k.. 3Ht e.-, -I!!. ar l-;J.-it$.- ft e.-;f..t Jt tf jt tf f.e. -+t RTC t£. 33-lj t it ~~~, t£.~-.Jt~ar£t£.~, ~t£.atlt~~£~~~I~~#*atlt. ~.~J~~ RTC t£.33-;fo~ t£. atJf, .i-~1*11!lf.-r1,fdn~ r% ;fo#*1l. t£.33-. {.l r;ljt: l-;J.tfj €'l HBU16-1.2 ~ i~1 ~ ~Jf*-tt f~ r% ;fo#~ t£. ~. Chapter 11 Analysis ofWistron OEM laptop circuit The circuit and sequence of Wistron are not too many features,it can also be said that its feature is quite satisfactory.The RTC circuit is similar to those of the Quanta,the battery is usually not chargeable,the power-on sequence is the Intel standard sequence.This chapter is not much introduced the RTC circuit and the power-on sequence,mainly to explain the protective isolation and the standby circuit.Then,as Wistron HBUl6-1.2 an example to analyze the protective isolation and the standby circuit. 11.1 Analysis ofWistron HBU16-l\\.2 mA~1!C~, j\"L1:: AD_JK, 1JoJd Ul £j(J S at .If, ~*IJ UI ~ialj\"L1:: AD+ (1:ElXJdMA~IG. 1L*~ftf~ff~*'JX1Eg¥tB~j*tl$:Eglt-t, EC ;t~~m Insert the adapter,producing AD_JK added to and R 1 produced the low level of 6.3V,controll:J adapter,because EC is no power,AD_OFF is low 1 to discharged the battery,then EC will send the hi Adaptor In to generate DCBATOUT DC'\" l05.106 >12.106 -2:38- Scanned by CamScanner

Figure 11-1 the screenshot or AD+ production circuit ~U2 tro1*-t&'lrrz:~/J\\E@.¥m:U~0;tt8 DCBATOUT, 18.3V, t!OI!fl11-2 Fif/Fe 'A1l~~)(IUced the small current common point DCBATOUT through U2 body diode, 18.3 V,is ~\"ID~' In figure 11-2. D15 h.J1I'Y'~-t-_>>> t A1R1JE_VOll 2SI I llDool\"tV. e1i.ohlo cbarg.r rutlction -1~14P1I NEAR Adaptor In Soft-Start Circuit I -_1O_1lVS Layout T<:1C8 250mil llCIlATOUT 2 R3 DD1R251:lF-4-GP the production ofthe small current common point Jt~IMltll'\" 1m1lJ 11-3 JiJT7Fo es' Cut off,the battery is isolated,is shown in figure 11-3. BT+ AD+ Scanned by CamScanner

RI94 IORlM02·PAD R217 C346 3lI3ICR3F-GP SCIU26V -IGP l-_......!!!!MAX8~73!..!..-I\",OC\"\",'N,---\"\"\"\"\"\"'-l DCIN +---_t------,~---~'Ir_--~MAX873~.:!.!I..!lA~CIN~__...L..j AC-. R216 3VIC>---k=-~~l---<~_.!!!!MAX8~73!..!..1~VD!!!.D_....ll....l VDD o&llKlIR2f.l-GP -::rC351 5CD1U25V3KX-GP ' 7 --\"'ACIi\"\"\"V....IN\"'--_---'''-! ACOK CHG_AGND :>ll.:W KAC llC'J n (( ' ) ' ) - - - - - - l 1 L . l ..,., 00 11-4 DClN ~ AClN rJ!~~OO Figure 11-4 the screenshot ofDClN and ACIN circuit 3 OCIN ff rgj§, U44 M. LOO .lJiilJ4tu I±l 5.4V a9 MAX8731_LOO, :tzll!l 11-5 fJT7J' 0 When OCTN is power on,U44 outputs 5.4V MAX873l_LOO from LOO pin,is shown in figure 11-5. !I 11-6 Jg MAX8731 a9 DeIN ~ LDO a9:ft~P3W:f:l!!Io About the figure ll-6,is the relationship between DeIN and LOO of MAX8731 internal block diagram. . - - _......-=lDO 01.0 cssp 1--2II----l 0011-5 Figure J 1-5 LDO output Figure 11-6 the internal principle diagram ofLOO MAX8731 8<]~Ii¥M9='m DCIN a<J <*f'Jtj(1itE 8~26V, ?zffi~}E-m: 7.4V In the data manual ofMAX8731,the DCJN effective value,is shown in fi~ lockout value is 7.4V(typical value). SUPPLY AND LINEAR REGULATOR DCIN, Input Voltage Range DCIN Undervollage-Lockout Tllp POint Figure 11-7 -240- Scanned by CamScanner

manualofMI\\X8731 8731 LDO t£i1 R204 -1:1 vee JJ!;IJ fJ.t rh, ~n Ifl 11-8 rfT:iF. M~J\\.O7 I LOO supplies the power to vee pt.n tI1rough R204,l.s shown .111 figure 11-8. RlO<l r C358 33R2J·2-GP SC1Ul0V3KX·3GP IG_AGND U4 SI4llUOBDY·T1 l SC1Ul0V3KX·3GP -===- Figure 11-8 the circuit screenshot of LOO supply power to vee , MAX8731 P3tl1Ijb=~ 4.096V ~~f1EItJ.I REF, ~DOO J ]-9 ffl5F • • ])0 er on,4.096V reference voltage REF produced by the MAX873I intel11al,is 1- . ~1.1J!J.(1l.x: AC Detect Output This open-drain output is high impedance when ~RiEF,I2. The ACOK output remains low when the MAX8731 is powered down. istorii'om VCC to ACOK. -pin defitfition:: AC Detect Output. This open-drain output is high 's REF/2. The ACOK output remains low when the MAX873] *=fa 9 up resistor from VCC to ACOK. ~tt, ~ ACIN REF/2 (2.048V) 111, ACOK 7fZ\\TI~ru Jialf of REF in the internal,when ACIN is greater than is shown in figure 11-10. ACII~ ---, Scanned by CamScanner

12. I1114 0R0402 C346 -IGP setU L-_....!!MAXlI~73:!l1 ~DC~IN!-.....zLj DC... ~_ _~ ~_ _~ ~_ _~MAXlI~731WAClN!!<!!!.._-'1N;Ill 3VlO--lr.~~--\\--t-_....!!MAXlI~73ll1..l!!VDO~~1..VjDO -;rSCOlC351 lJ25V3KX.GP ~ _~=V~IN _ _...Jo>..-tACOK CHG~ND -=-1..,., ~:w or. 1=;(\"'JO (( \"'>\"'> Figure I I-I I the screenshot of ACOK output ACAV_IN ACAV_TN E8 MAX8731_LDO 7tEfiJg 3.3V ~~4Z, -~~ Q3 1'=:±'11£~~1¥J AD_IN#~ EC (1i=Jg EC B~~nc.B~:@jf!dffi%), 1mOO 11-13 JiJT5F. ACAV_IN is divided into the voltage by MAX873I_LDO to be 3.3V high level by MAX8731_LDO,through Q3 to produce the low level of AD_IN# to EC(as the adapter test signal of EC),is shown in figure 11-13. J1-JE1H~$IJ U3 B~ 3-4 JJp~iOi, 1E RI83 1t:tt!!.. 1}~mtl¥JiHt'i?:~ii RI82 ~ RI83 mJ£ 7t)J~, 1'=::1:. 6V 1L;t]((']~ffi*~ U2 ~ 4 Jjip (0 ~), U2 ~ S ~Jg 18.3V, 0 ~Jg 6.IV, U2 ~ii~J~:i:n7f, AD+1I1tmt~0~t.i:, ~:±.*Jt!rm:~0~t.i:, 1mOO 11-14 JiJilJ'. The other path controls 3-4 pin conducted of U3.makes RI83 grounded.The small current common point through Rl82 and RI83 to fo ~ure,and produces about 6V voltage to send to 4 pin (0 pole) of U2,the S pole 0 6: JX)le is 6.lV,U2 channel is fully opened,AD+ directly flows to the commo e erge curteot common point,is shown in figure 11-14. Figure 11-12 Figure 11-13 -242- Scanned by CamScanner

- R3 OOt1Q512f'.4.GP ,layoutTrae:e 250mll u, RIM -...0> C1AlE. 'the screenshot of the large current common point production circuit QlJ HBU16-1.2 ~~fJl~R%7tt-JT YIJ~ 11-15 Scanned by CamScanner

VI-Ill VI-Ill R483 END ENTRIPI 51125 ENTRIPI ENTRlP2 VREF 575 51125 TONSEL TONSEL 51125 SKIPSEL - SKIPSEL ~ on CI W W ~ ~ TPS51125RGER·GP VI. GAP-ClOSE-PWR R ~ ------- -------~- .,(, )~~~I~:v~I- :r_~~s:x~ ~C5T7 C578 ..... -::- + 0630 -1 00 11-16 TPS51125 l1!i&8111 Figure 11-16 the screenshot ofTPS 51125 circuit +3VL KBC +3VL Q ' -; - - - -,-, 9 R56S / O~PAO - 0701.1 LIMIT SiGNAl n 1 ....A.~t....-------.....-~~ -244- Scanned by CamScanner

power supply.to supply Ihl: voila 'c to X2.Cf) sIal 0 cillator slan.and send to 2.7 8kHz.i. shown in figurc 11-19. 32.768Khz 12.5pf 10ppm 1a~: 82.30001.691 (KeS) 2D4: 82.30001.861 (EPSON) 1-19 Ee standby clock Be ttCJ~.fft, ~OO 11-20 rfr/ft. standby reset of EC.is shown in figure 11-20. Scanned by CamScanner

Jl ~I: 8_PI:\"--;s-ac ~~Bg~l:::::G:::mijiiU§i~ii~3iI.E~~i:i~i::i;\"SC~l(['- FI:tJ WPCE773l.AllDCJ. III 11-21 EC n~ SPI.~,~xi3l)Jtp Figure 11-21 SPI bus pin of EC .:JIIl KDC .M_ICBC ~ 0120 8PlWPl2C .2 :..- R>I> .... ...... WPG \"'r.?'\"' . 1~ \"\"\" ~N .... COl I• t1Ot2J.1\" r I > COl \\ICC ~ DO HOUlI .... ~= ~ \":;:\" W:z5X18YI8Q.GP .~ a .....soo 2M Flash ROIl <0 ......\", l.t: 72 .25Xl6.AOl 21 II'l.IlQ( «» \",,1lQ( ~~ 2nd: 72 . 25165.AOl 00 11-22 U25 rt!i'6~OO Figure 11-22 the screenshot ofU25 circuit EC .iE1t*]lH~Ff)§, fta.wEi ~.8I~HJLo ~r* EC iJUjlj~1j 93 ~B\"JmI!iCB:talA.f&mH~.f} AD_TN#, ~DOO 11-23 Jiff/Fo After EC reading the program normally,contigured their own pin.Then,EC identifies the adapter insert test signal AD_IN# of 93 pin,is gure 11-23. EC f&~m~f~~-'fZB\"J~ljmnGHA.m7J'-m 1:l1~~3JZB\"J PWR_85_EN, ~[JOO II-24 JiJT/F 0 EC detects that the low level of the an indication signal,then sends automatically the high level ofPWR_S5_EN; Figure 11-23 the adapter test signal ofEe Figure 11-24 E sends PWR_S5_EN PWR 85 EN ~$Ij Q42 ~1I, ~D 51 I25_ENTRlP2 ¥i1flIH:t&, PWR 85 EN controls Q42 co 25.51 I25_ENTRIPI and 51125_ R498 and RS08. -246- Scanned by CamScanner

.3VL RSU 100KR3J·L·GP 51125 ENTRIP 51125 ENTRIP1 CG08 Y R508 1GOKR2F-GP Cl> .£., '~\" ~.z:. Q.., '1 51125 ENTRIP 041 51125 ENTRIP2 ClIIII Y R498 160KR2F·GP CD I, - PWR_SS_EN ~$lJflCJEl!.iU\\H~ t oCtile circuit controlled by PWR_55_EN figure 11- ,+SVALW. Scanned by CamScanner

~U30 z :> '1 51125 VBST2 Q V8ST1 .,., 51125 VBST1 , ORII603-PAD VllST2 DRVHl .\" R471 51125DRVH2 Ul 1n DRVH2 ?n 51125 DRVI·t1 51125 u.2 H u.2 DRVll 1Q 51125 LLI I? DRIIl2 ., 51125 DRV1.2 VOl .,. ,51125 DRVLl ORII603-PAD ., VFBl R4n V02 '1 51125 V02 PGOOD 51125 VOl \" VFB2 ENlRPl .,.. 51125 VFBI 51125 VF82 , 3 1~ ENO GND 51125 ENTRIPI GND 1\" 51125 ENO R ENlRP2 2IlKR2F-GP ?J; ..~ VREF 51125 ENTRIP2 lONSEL 51125 TONSEL 51125 SKlPSEL 1.. SKPSEL VCU< ~ i l!J TPS51125RGER-GP ..l ~ .J 00 11-26 TPS51125 (fj 1 Jj!plO 6 JJt4J-I\\! III Figure 11-26 the screenshot of 1 pin and 6 pin ofTPS51125 Design Current-6A OCP design>8A G46 GAP-Cl _R G50 GAP-Cl _R SV_PWR G49 0fN1UI GAP-Cl _R G51 GAP-Cl _R G46 QAP.Q.~R GAP-ClOSE_R G113 R QAP.Q. 00 11-27 Figure 11-27 +3VALW fn+5VALW ?t§jlJiJt~j1jmtf(J ffi, ~IJ ~ 11-28, ~ 11-29 PJT7.l'. +3VALW and +5VALW supply resPecl bridge.as the South bridge standby vol~e is -248- Scanned by CamScanner

+3VALW -Clsa - --I SCD1U10V21O\\-4GP Figure 11-28 3.3V standby voltage of the South bridge lmA OJO R427 10R2J-2-GP I CH751H~PT VSREF S5 C551 I ~SCD1U1OV2KX\"GP I VllREF so U60F 5B VllREF 86 4\"., VCCRTC All VSREF 41'1 VSREF_SUS 1~29 SV standby voltage of the South bridge , iIllllu-30]Jfff;;. ,is shown in figure 11-30. ~='=--~------:-:-~1 GPI044ITDI GPlO45/E PWM Scanned by CamScanner

RSMRSTII 0 ' - \" \" ' - - - - - - < < <RSMRSTILSB 32 CK_PNRGD >>>CK_PWRGD 16 58 M PNR / / / M PNROK 7 12 Figure 11-32 RSMRST#_SB is sent to the South bridge -250- Scanned by CamScanner

~, ~~f'Uid~IH~t~e,.:r,t~.>Z~1~~~tn,1ti~~.;f~o~kHJ~Lt.t3_~.~~J:.~tt~u#tJf~.;fto tR~TC. tt3&-~£.$­ EM laptop circuit ofthe motherboard designed by Compal is the protective isolation and the wer-on sequence and the RTC circuit is almost the standard sequence.This kinds of Compal protective isolation circuiLThen explain one of the P protective isolation and the standby circuit 1fI• .f;I1*mEt!~. as an example to analyze the protective isolation and PL24 mtz:1:. VIN. 19V, !ZIJOO 12-1 Jifr5f-. il and produces VIN, 19V through PL24.is er interface is shown in 12-2. VIN Scanned by CamScanner

Figure 12-2 Com pal motherboard po\\\\er interface ~ PD2 PR304 fll PR305 afJ*lf*$t\"~ VS, ~~ PQ42f*=f&1ft'::l:: 1, ~ PRJ06 TCP. pj.~j1 PR309 tz:~ N2 ~~1li:im PUI4 ~Et!., PUI4 $J4J:±l 3.3V f8 1112-3 fiffiF. VS through the parallel connection of PD2.PR304 and PR305.and produces j Ij diode changes to be CHGRTCP through PR306.then through PR309 to produce to the pressure regulator.PUl4 outputs 3.3V RTCVREF,is shown in figure VIN Scanned by CamScanner

(II IIJi 111 1 I'I(VRU, L~h. f'1 VIN It!JU ]-17.24V (~IU~ilir;~ ) IN/(I'R l)7IPR,OI)· PR1(J1 I'I:J~i,~\"J,V- f 3.3V). It~{,H;JfiW PI I till)\" II 1\":1 It! '1'1'1:) PI\\ IN .flll\\ IN. ~lIr~112-4 f1j/J ,nh 1 I 1·:1· 'I' thl' ugh PI 297 and PIUO I diving into the voltage,if the r th \\l\\ 17._,IV(llluk' n rough calculation after ignoring the hysteresis IN/ (PI - q7 I PI 0I) '\" PRJO I i higher than 3.3 V),lhe comparator will into th ' vnlt\" 'e by VIN and through PD I steady pressure to produce the IN.is shown in Ii ure 12-4. vs VIN L.--L.A./V'-\"------O RTCVREF 17.525V, L7Ha~ 17.90IV. t!nl~ 12-5 ffriji: • . g edge of the VrN voltage threshold value is -5. _it.:• Bt~l:I!~ B+. ~IJ 00 12-6 Jfriji: 0 (PO 141CiD.Typ....... -f*iiTif I~ ...----vi-n-o.-\",,-.o-to-.----, 8-->L 16.\"6V 11.52SV 11.728V L->B 1'7.430V 1\"7.901V 18.3B4V +)X 00 12-5 YIN ~1!El!lli~~ fI conduction,power supply in f lmA the voltage is about t the data manual of l'Mlllan calculation:if 1357.)....!the Scanned by CamScanner

8+ power supply in advancc B+ production circuit J:I!~, 1! PQ69 ~jjft, 1N~ PR395 fO PR394 ft-II*. ~H~ ~*Ir*Et!J.Ii?tffi, ~O~ 12-7 J5JT7F. ~ B+J:l:!.ll~-f ~*T 3.3V, ~t$X~Hfim~tfJ, El3 VL U1LT:J~E\\! ~ ~tEM=mEt!.~9J?ttJT). evel,rnakes PQ69 conducted,and makes PR395 and istance is 138k..., after parallel cOImection.B.l. lei resistance,is shown in figure 12-7.lfthe istance PR385),the voltage will higher drain outputs,and is pulled up to be a by chip,we will analyze it in the Scanned by CamScanner

YL 2....2..M_ ... B+ vs ,..\", PACIN 44.47 RTCVREF C>-----..::MK..'-vv''''''v-'-''-''_--4 JlT--f-2-----o +5VAJ...W the screenshot ofthe ignition loop circuit 1.35k\",1!'t, ;l!tJtJ.li{i~UiL1E.t~ 15.2Y lJ,\"f, ~£i1 Jt~£J.:5tff f~ Eli 3.3V. ~~. 7 JJt1J~I'±HE.tJtf, T~ AeON, MAINPWON &PqR.\\~IIDi&. Scanned by CamScanner

MAINPWON Y.:J If (lJdliQ:; (i~J''iG ~l)tHt;r~ I }.'X l' G~~'';'6iJ)D. When PACIN i high,+5VALW is produced.PQ7! is conducled,PQ69 is cut on:PR394 i nOt grounded.as long a Bf is nol Ie than 6.6V.then it can make the comparator open drain olltputthc bigh level.ACON and MAINPWON are not pulled Jow(the adapter mode.the ignition has been completed). 00 12-8 JifT5F~JJILI:jgi~~rQ.llll.)§, B+D~~~~U~~11i, lfrj11jCX~+!'ht~ 14.8~ 15.9V, 'l!.YIM~h\\ 6.2-7.3V (~IlY.r:p fAJ 010 D As the figure 12-8 shown,after adding the hysteresis resistance,the detection threshold value of + the adapter mode is 14.8V-I S.9V.the battery mode is 6.2V-7 .3V(select the intermediate value). igure 12-8 the text screenshot of B+ threshold value voltage settings in the adapter and battery ode i=3[.m~, ~o ~~f¥H= l£f\\itlMIt11k Itllill1T,j3Z IE~iJ~ *,IJ 7f 18 ~1lkJJX It D~'tr.fi5L EC - f.R- 1:l:l1a;~-V-i¥J ACOFF, PQ6S ~~l!:, PACIN 7-J~, ACON IGfffi:b~~:M1iL11£, PQ63 gMft~ lfLtro G ~~IL PQ63 ~jffi, :tzoOO 12-9 JlJT5FD About Compal machine,for example.non program controls the correction of the banery and forces to open the battery discharge,EC always outputs the low level of ACOFF,PQ65 is high ACON is not pulled low by the comparator.PQ63 obtains the G pole ~el PQ63 is conductedJs shown in figure 12-9. 3 Scanned by CamScanner

Ugh the body diode of PQ51.through PR354 and PR361 then through .toms partial pressure,produces about 8Y voltage to add to the G pole of oonducted completely,YIN flows to B+.the common point of the large in figure 12-10. Scanned by CamScanner

[f,Ju1 PQ59 illn&.ll:. PQ58 n~ B il'2HJJl YIN tLi$. PQ58 ~illL PQ56 [5]fFill%J.ill, P2 ~£j:t PQ56 (j~ E f&¥ilElnJ C fiL J§j~)JO~1j PQ51, PQ52 8~ G f&· f~Z. QJ1t~:jl~.lL At the same lime.PQ59 is cut off,the B pole of PQ58 is pulled up by YIN,PQ58 is conducted.PQ56 is also conducted,P2 flows to the C pole through the E pole of PQ56.then added to the G pole of PQ51.PQ52.and make it cut off. m~¥I!!.~ ;ffl1i)[ ~ r:f!.lMHIO 00 12-11 J5JT7J': 0 The circuit of the battery isolation PaQnd61dis~jcfhfair,geHiLsfEs,l;h; oPwDnI2in Bf~igiEu;rfel11,2-PIDI.I2 t\\\\l.\\:; ACOFF 1J:!. 00 12-11 toP, 3 PACIN f:J1Ji. ~fE,l;;, P09 ~ll:; =fl1~ PQ57 B~ B :f)H~§*El:!.~.ElrtLf:JfE,l;;~-¥. PQ57 ~.t.l:. YIN ~Ht PR352 -.till PQ53 ~ G f,bZ. PQ53 ~ll:, Et!1lJ!.~~~ 0 In the figure 12-1 I,when PACIN is high,PQ61 is conducted,pulls low the positive pole of POI2,POI2 is cut off;ACOFF is also low.PD9 is cut off;the B pole of the triode PQ57 is pulled down to be the low level by its own resistance,PQ57 is cut off.YIN through PR352 to pull up the G pole ofPQ53,PQ53 is cut off,the battery is isolated. CD tlO:W-: YIN ~Et!, PQ53 B~ G f&~ PR352 rillt~±l!!., PQ53 ~~, ~1lliJ1)(~o If YIN is no power,the G pole of PQ53 will pulled down to the grounded by PR352,PQ53 is the batter discharge. YIN lfEl!, ff!. PACIN ~f~Et!-¥, PQ61 tlGll:, POl2 iE:fl1:tl!i PR357 LtL~~, Q57 -tB~ii!i, YIN ~i1 PR352 fO PR356 *ffi~~ PQ53 B~ G :f&, PQ53 ~iffi, ~ on,but PACIN is low Ievel,PQ61 is cut off,the positive of PO 12 is pulled up to 12 is conducted,PQ57 is also conducted,YIN through PR352 and PR356 to the G pole ofPQ53,PQ53 is conducted,the battery discharge. iiuh::::t------~B~An+ Scanned by CamScanner

Figurc 12·11 the batlcry i 'olation circuit -fACIN lliJg,*Ji{J.:ljZ, 1§ ACOFF tt!.7~1';;h (~FF~Hiu~..rElJ.it!!.5nlf~ufj)cl~ ~~J!~-B:illi. YIN t£u PR352 ;fIl PR356 7}ff~g- PQ53 R~ G :l'Jk, ClN is high level.but ACOFF is also high(when the program control battery),PD9 is conducted,PQ57 will also be conducted.YIN through • to the voltage to the G pole of PQ53.PQ53 is conducted.the battery dian of VA(the adapter mode and the battery mode) S shown in figure 12-12,look at the following analysis. VIN Scanned by CamScanner

510 #li~JHIj 012 lil Q32, 3 11(-r 7f~,Fp, ON/OFFBTN# 7~1lt. ii!H1: 012 111'ft o # M.ffij~j: VS. ~!J 00 12-13 JiffiJ;. -. SION# connects toOl2 and Q32.after pressing the switch.O /OFFBTN- is low.through DI2 pull 510N# low.then produces VS is shown in figure 12-13. M2t7f*ff.J[iiJB1iI~~j: ON/OFF ~ EC, EC 1!}tztJj~rt-'ffI9 EC_O *~jlli 032. ~ 510N#73{l\\; It!.4! 0 '- At the same time of triggering the switch.it will produce 0 IOFF to send to EC.then EC sends high level of EC_0 to conduct Q32.and keep 510 # to be low level. (t3Lff.J1HJlfttE~.9::ff~~1liJ~rnc~~~~-r7:J 17V 1iti, It!.it!!.m~r7:J 10V 1iti < ) (before triggered the boot pin of Compal.the voltage is about 17V in the adapter mode.and the ~e is about IOV in the battery mode.) .:I'IALW _ _ <=1----, Scanned by CamScanner

VL 0012-14 B+~~ PUI6 ~~ Figure 12-14 B+ supplies power to PU 16 jRjttT~Jii, .fI}Jtlli~ EN_LDO, ~llm 12-15 Jifr5F evs .R!J1i@ir 2.4V, .jij.1tlliJiif=1::(fj EN_LDO nr~*T 4 }jl;lJlr~1fi 1.6V)0 diode PD7 to reverse breakdown.then divided into pressure to 9.'18 as VS is higher than 7.5V,it will higher than 2.4V after reverse dividing into pressure can be more than the threshold value Scanned by CamScanner

~ 12-16 PU16 !fu\"'trtl:l LOO *D VREF2 Figure 12-16 PUI6 outputs LOO and VREF2 RT8206 I¥J EN], 2VREF_lSL6237 }[:J3g1JlliV EN20 f~* RT8206 B~i]lm tt13jtf=~+5VALW JE7f~Ef=~+3VALW, t11J~ 12-17 J5f-r3Fo EN] ofRT8206,2VREFJSL6237 is added to EN2.According to the pin REF,sets that produce +5VALW first then to produce +3VALW.is Scanned by CamScanner

is not pulled low by ignition circuit and also not pulled 10\\\\ by H~~.....,l is high level.RT8206 opens PWM I first to control produce being stable,then RT8206 opens PWM2 to produce +3VALWP(32 pin ed,two path of PWM are set respectively fixed output 5V and 3.3V),is the other path is connected to 3A control circuitwhen the C).When reach a certain Scanned by CamScanner

VI. VI. L-+~--------f------1~------------L-=> MAINPWON PU30 temperature chip circuit ~ renamed to be +3VALW through the isolation point,+5VALWP isolation point,is shown in figure 12-20. t-'-----<l +3VIILW two voltages renamed Scanned by CamScanner

*;c~~IfiIli • .Q JS r:~+3V ~fJHJif~H~11LIf!IT (U14 *:iQ(J(J@~jf-lIt UI-l III U-22 Jifrij;. 1eCli;·\"\".3V through the isolation point J5 to supply the standby voltage( @ next to not installed.JS is short connected) to the bridge,is shown in figure J 2-22. VALW TO +3V(PCH AUX Power) Short J5 for PCH VCCSUS3.3 ~v 40mil C393 C392 '--_-----, 10u_t_l0~':tO!10V4Z .~ 12-22 +3V production circuit ~~jj:(J(J VSREF_SUS, ~IJI!l 12-23 jiJfij;. 169 to supply to V5REF_SUS of the bridge.is shown in *8_ 00liS tl:l SPOK, ~D 12-24 p!fiF. SVALWP nonnally,open drain outputs SPOK.is POK Scanned by CamScanner

1'0\" TP06,oK.Tl-EJ SOT23-3 o--- ....,....-1.....-,;;-3-+-ri~-r-I----<>+VSB p B+ S VL lQ, 111l111•.IN02..1% ~§, ~.. 00 12-25 +VSBP f'~ Figure 12-25 the production of +VSBP ~mlt!.ffiiE~J§, ,,~~Jb1m XI il9~, ~IlOO 12-26 JiJTlFo by voltage of EC being normal,the external crystal starts oscillator,is shown in 0z 0z 0z 0z 0z oz ~ (!JelCH'el KB926OFD3 20mil .. ~~~~~~PCIRSTE'CRISGT.PIOO5 SClI/GPIOOE CU<RUNIIIGPIO' 0 Scanned by CamScanner

00 12-28 EC -L<J;!1X BIO n~c;lJJtjJ Figure 12-28 EC reads the pin of BIOS 150mils lJ:)I EC SPICSlIFSELf SPI wp, IH • ,0•.RMerYed lor BIOS 01...... Foolprinl508 12-29 the screenshot ofthe place where U31 is circuit,then EC will wait users to trigger the switch.and w we don't detail. pllotective isolation circuit Scanned by CamScanner

PreCHG PR16 1K t208 5\"'- PRn TP081OK-T1·a SOTZ3-3 YIN 1K_12'08 5% PQ27 - PA7Il P07 B+ 'tL1206_5% lL4148_ll34-2 PAlll .~. '-<-'206_5% 00 12-30 1y!f:tteg B+ Figure 12-30 the power supply in advance B+ J:tr. ACOFF ~ffk. lIta1+5VALWP ill*f'=:±.. PD9 7Crtd~ PQ28 ~ it PR83 f.D PR86 7tffiJf~I1.M~X1ffki:E!.3f. +i:E!.:/frEB~ B+f'=:±.. i:Hj ACOFF ~7fJj. £iJ(.1!f+5VALWP .lE~F:±'J§, lIti:E!.~~:W~*I~o wer supply,ACOFF is low,and +5VALW is not produced,PD9 can 30 will be conducted,to make PR83 and PR86 partial pressure to I current B+ is produced. When the program control the battery 'gh,or after +5VALW producing normally,this circuit will be ~ PRECHG ~ ~~*ltl'ilf~ , I15l LL4148 ~1:t1}iffffl. U148 ffi~ IV). PRECHG t}rl7tffi, ~i~ PU4 tpflttIlJl:~rrF : ~then PRECHG will also be pulled low,because of CHG will be higher than B+ I V(after through partial pressure.is sent to ACSET as follows: to a resistor divider from the AC Scanned by CamScanner

1:1:1 PRECHG ~8gil1-t- 18.09V 0 El:!-t- B+iJ?: PRECHG ~5:tt PD7 rz;j:.rfj . •09Y. ~DOO 12-31 JiJT7Fo open drain output pin,when ACSET is higher than 1.26V,ACPRN is than 1.26V.ACPRN is pulled up.that is to say.the threshold value of ation of partial pressure [1.26/PR47* (PR43+PR47)],it can conclude than 18.09Y.Since B+ is produced by PRECHG through PD7,so the ited to be 17.09V is shown in figure 12-31. YIN ACSET Jmtt 1.26V, ACPRN ~~ t±:J 111 ft!..\"Sf, PR74 7fffif~iU~It.\"Sf, ~a1 ACIN ~ft!. CHG is nonnal,ACSET is higher than off,fACIN obtains the high level through el of ACIN is sent to EC,is shown in Scanned by CamScanner

IClJrt!.fB~ PACIN ~i1 PR63 i~ PQ20B ~iill .. VIN ~~rl PQI2 i*=tJl~1\"\"1:.n~ P2 ~iJ: PR4I tl1 PR50 7t1li~ 8Y ft~:i, PQI2, PQI3 ~:iUl. YIN ~rli¥:!'PIWj;%F~*~¥iii B+, tm ~ 12-33 JifT~o The high level of PACIN through PR63 to make PQ20B conducted.YIN produces P2 through PQI2 body diode then through PR41 and PR50 partial pressure to be about 8Y.PQI2.PQI3 is conducted,YIN crosses the protective isolation to produce the large current B+.is shown in figure 12-33. P013 ~7JU;08 P3 PR41 200IUMO:U )i, i!L1f£ PQ20 B~ G 'if. B f& Jt!.Il>J ~~ft;1i: ffi ' Scanned by CamScanner

s __\",,~•c•o_Dducted.and conducts P2 to the G pole of PQ 12 and PQ 13 directly,two P closed.YIN and B+ are isolated. m/J\".4 t= ACPRN Jgf~ Jtf)§, PQ 10 1itl1:, VS ~£i1 PR36 1!E PQ9 B: , PQ8 mtlt. ENTRIPI 111 ENTRIP2 /F~!l!!. (1£: vs H~-tE~j1JG~t~ ~m~l'~!lH!k:&7f*J§;1-~tz:j::, i8:1'~ LA-S891 P ~1:lflK£U. If , MAINPWON Jgf~, -1£%~.Ll: PQ9)0 MIl in figure 12-34,when ACPRN is low level,PQlO is cut off,YS makes PQ9 6 pulls the G pole of PQ8 low,PQ8 is cut off,ENTRlP I and ENTRIP2 are not uced directly just in the adapter mode,and it needs to trigger the switch in it will be produced,there is no difference with LA-S891 P,not to explain.lf it ,MAlNPWON is low,it will also cut off PQ9) 0 1 *0 ENTRlP2 1i1fl~H:fH~Jl!!., rm~illiJ1Eg~J3. PR27, PR28 1t!l!!., PI -:r5YALWo of RT820S are not grounded directlY,but through the resistance 't can produce +3VALW,+5VALW successfully. ~5( T ENTRIP JJt4J8911=ffl~1~~~,fo*lk~~Egyj[iiJE, ~lJ:tJjljJjl±l!!. JtmN~:tI!!.H111=~flk~~Egmt:i&JEo ~J:tP-J$)A YREGS ':71 JJ.Jt1ml' • 1 and Current Limit setting Input. Connect resistor to GND ous RDS(ON) sense. The GND-PHASEI current-limit lover a O.5Y to 2V range. There is an internal J O~A e logic current limit threshold is default to 200mY Scanned by CamScanner

Figure 12-3-1 the enable signal and the control circuit of the standby voltage • .3 Analysis of Compal LA-6751P protective isolation circuit 8;t~~reft1IDA. ~~tI:l VIN, ~DI!I 12-35 JiJT1Fo VIN First,insert the adapter,output VIN.is shown in figure 12-35. DC0300D6JOO ~'\" ;;l ~, '~\" ~-~~ -gi, 5, ~I Jl~' f-8- ~~:~' f-.~ 00 12-35 VIN (j~1\"~ Figure 12-35 the production orVIN ~Et!.~, ~ZD 00 12-36 Jiff/F 0 VIN Nrl PQ30 I f*=f&~F1 02 Jr-J~j!llr~ G t&~;f§)(11~J:E!.~o tBJlJt~i5?\" l1tJtl,J~H~'~ ~Jr-J ACOFF (BATT OUT ~LJ:E!.j§:t~!&JEj:J,f, JJUJ::f h the common point B+,is shown in figure 12-36.VIN little more than 18V,the conduction of PQ30 I and tively.That is to say,there must have the high AIT_OUT is high level after powering on.is Scanned by CamScanner

B+ P2 65\"':0.020 !IOW:O.OIS eCsSsIpl.l 8251 VOO PR310 <~;J> FSTCHGC:>!F:!<S:!ll°~\"''f-\"'':(..\"''--4 PR]13 10K Oo&Cll% C[US ~ I800P_0402_23V7'1( pc,. PR:111 IOK_l).I.Q1_I\"\" ~i-\"\"\"'-\"\"\"\"'P:-VV--'---~~....Lj D.01U_CWO'.J5V7K , ICM R323 --'\"...... NJP_I <:=J- ~OCU)Crz-' . . ...... 0-\",------\"- IlllM -Z..21UMO:Cl 5'\" V common point production rBllfftro ACPRN ~A, PQ316 ;1-~ ¢)~~ PR338 ~ PR342 7t[n~ ,~·,........low level of ACPRN eat voltage 5.075V) dproduce Scanned by CamScanner

6251 VDD ACIN PACIN PR342 ACPRN r-->-------\"-\\-w,'i\\... P0316 I~ 12-37 PACIN ~D ACTN Bgf\"~ Figure 12-37 the production of PACrN and ACIN ACOFF ~EI:J EC ~tU ~11~~-'f, P-fH£*m*~ff:~iM r:E!.¥tl!.5ffi.*IJJJ~~Bt, EC ;t~J.itili~ tf<J ACOFF. GOFF is the low level sent by EC,only when the system program controls the battery forced C will send the high level ofACOFF. *jif ISL6251 8123 HtIJ, ~1J1!l12-38 JiJT7J'. llHM lSL625I rilJM=fn}}1~~Q, ~ V nt. ACPRN ~~~$jutl:\\1kX;r:E!.-'fo ACSET *1mff YIN f.£tt PRJ06 f!l pin of ISL625,is shown in figure 12-38.According to the data manual • is higher than 1.26Y,ACPRN will output the low level.ACSET comes PR306 and PQ312 partial pressure to obtain. VIN PreCHG ;~;;, !, 'C\"D ..•- ACSEllN Scanned by CamScanner

lanned to Use the mat . . ' . •n • . LIIe 19n1lton loop,but is not used in this machine((@ ot mstalIed),ls shown in figure 12-40. Vl vs ... ~ o 0= \"-. }fflJ', VMB2 ~ft!.¥tJ!~rJ1j~~Jjl;p, 625 IVREF ~*§T 21t1.J.i11£T 9.08V J§, ~jj PR212 to PR215 7tlli afi 2.39V, 7 JJt4J~iHtl11£ El!3f, PQ20 I ~lJ: 0 12-42 VMB2 is the battery interface power e 2.39 output of ISL6251. When the voltage of 15 partial pressure to send to 5 pin of the 6 pin,7 pin outputs the low level.PQ20 1 is Scanned by CamScanner

Figure 12-41 BAn'_OUT control circuit [i:iJ\"tj£Mf~ EC Ltl±lnq1[Lt3f BATT_ LEN#, PQ205 :;ti;;~.1l:, +3VS ~Ji PR211 1+1'!-L BATT_OUT ~~rt!.3fo {g+3VS ~~m SO ;jfC01~1t, JijfL;l.Jl-tf§ Ij- .R~I:E7ffJL~i0T:tnr~ ~*IH~HFIWi~, ::ftEJ!1R7HJT 7. At the same time,it needs the low level of BATT_LEN# sent by EC,then PQ205 will be Cut off.+3VS through PR211 to pull up BATT_OUT to be the high level.But +3V is the power SUpply in the state of the system SO,so this signal can control the protective isolation only in the boot state,not to analyze at here. Scanned by CamScanner

~4~o -*--tl-J- DosXX Dunkel 1.0 (HP_6510b) 7g1J1JiJ}J1j!f-~.:tr.it6f; fli5'i.il!L.l.*-~ Jt&.ft. 7(.1+;;t n\\, EC 1ft:Y *-l:1 tt,ffi J:t ili'l. it ~t T ~ S] tt;i'~ Scanned by CamScanner

® VADP ~}ii R108, RI05 Ej RI04 :5HIi/ix 4.8V j!~ 5 Jj!jJ, {L\\; f 6 ))'I4JB~ 7V, !tta\"'tU W~ft!.If ADP_EN#. VADP through RI08.R I05 and RI04 partial pressure to be 4.8V to send to 5 pin.i less than 7V of6 pin.the comparator outputs the 10\\ level ADP_EN#. ® fa; ~ :;P: (8 ADP_EN# f~ Q7 ~.Ll:, ADP_EN 7~ tJj, ~ ~~ EC, 1EI11t n171:: jill eg , LP_S3#_3R ~fa;, Q545 ~.Ll:, BATCAL#d:IJ.!§:£:/t~[~lli~} R9252 J:.tLf~J?~,tJFI:!/rL. The low level of ADP_EN# makes Q7 cut off,ADP_EN is high,sends to EC.because it's no power at this time.SLP_S3_3R is low,Q545 is cut off,BATCAL# is pulled up to get the high level by e adapter voltage through R9252. ~JIt. Q507 liID1~IJ~im, f'~+ADPBL. Then,Q507 is conducted successfullY,and produces +ADPBL. 13-) 9='. Q514 ~iG:i:~W, rm!lH~~~ U5 (BQ24703) ~tJjB~f(l;;~:;P: ACDRV#, A Q514 ti:jjjij+VADPBL ~ D, S ~z..fEi]B~1*=f~~& D510 fiH cg1m~i:~.~ IE 13-3 PJT7F. 13-1 ifQ514 is conducted completely.it needs the low level of ACDRV# sem by ific process is that,+VADPBL in the left side ofQ514 through the body diode and S pole and D510 supplies the small current to the common point 13-3. Jii~~~+VBATP t:lt~*;fJ1.~~~I:ffi;~h TPS51120 B~ YfN i1= ~/'3~hB~ EN3, EN5 ~S::. t~1JiS TPS51120 B~iJIIlfIJI:EX, VREG3 fll VREG5. VREG5 ~@!~ V5FILT titEg, f\"1 after crossing the jumper wire PAD6.supplied to VIN ortlle 120 as the main power supply,is shown in figure 13- in the air,according to the pin definition of uce automatically VREG3 and YREG5.VREG5 e reference voltage with 2VREF. Scanned by CamScanner

+V3AL • ·.l·.t AC_AHO_CH \\/l ~11 • R3 () 2[D.1UF_1 IV u ON_LM3930RZG_SOP_8P § A SSM3K7002F z (l) - p.. 10 ~ 3 n [311 S ~1 \\/l ~ (l) \"\"'!

+VBATIl ...II ::: &-~J.\"\"'.1f...tJ..u-;r- I ... RIll R111 * t-1 IC381~~25V - - - - ~. 10K 5% 150K_5% %7UF_2SV R575 ~ 1\":- te-.n-......u-..;.:..., R82 lK ,,.~ 100_'% ..=. -1 -~ 32 1~~ .z ~ o-----J 021 >: u~ 1K_5% ...-.. KeYlnNn.. _ RU1Ie r-: ALARM ACSB. _,.. - R30 11 AIRUURTM ~ \"\"\".~ 00K 5%\" ,, 71 ACl'RD -:,-.:.--.:..I - 247D3VREF __ ..••. _ . .lli r=~= I \"~~ RIIo t6 --j-, r .. ~ R8' ~, 13-1 -0 J~ !,':it\"1: 4:!.~it ~ ::::::;\"\\

,VADP r.VADP OIIJ.1DI3D1l2G_80P_IP J'\\1h~'t-.a2~1hI'l CII RlGI 2ZAK_I\" U- .V3A !lUF_:ZSV 1 t ,ua. 2 Roll IOK_1I% 1._11% Rl06 P_1l ....\",.\"''''''... :p..M-H ...... 1.I11U\" ~~ 1 1IR._!OI\"I, RU P_E~ 41K..5llo u- RIO 7 22GK_1I% -I\"'.....~ ------.....--.....-- Scanned by CamScanner

~-tt---H-H---;--Hi-'~~~~ o ~ N r----.--\"'BI~ 01') • Cc./.l f- Scanned by CamScanner

Figure 13-4 1'P 5112n circuit (1lI1lt1135 J,i/J··, IJ 1l!.¥~UI~·1 VBATR l,iJllJillrrt B024703 (I~ 22 )Jt~ VCC ff):J{jl:Eb\" VADPBL M rt!.1111 R27, R26, IU \\ :1\\ l[H) Jl~ , JJII5i t~!iX ;f:* UI (1'J 5 IJtI!, ':ij 2VREF IQ.1I tU~. f\\: VADPBL IUHi,',:j r 10.87V, L~~x(,;* Ul (1107 IJtlI~:;Inrd~l!1j:Jjjilj:yq~*a.jillA.f.&~mH~ '% ADP]R.Es, UJ +V3AL ~i R89 I::AJLPXr::jIU'Il.. ADP PRES ftjirum R9\\ :iE~ BQ24703 iY-J ACDET 1Jl4], it'i-tJt P9$1¥J I.246V 11l(](iL B024703 i;'~J;j~~:illf..IiC-6~jffiA~f(0, ~·6IjtL\\1l£rt!.fO~ AC_DRV#, Q514 8~ ~ It ¥Urt!.~.Il R565 :frJ R575 'l}lliJRu<.J1\\;Vl:!.3fJR~jrH, j-i\\:!.¥mU1i~~·t8+VBATR f'=::t (tt4X*~ifN\\ llJi1J~tI:l1t:ruJFJF-lf~ 'J AC_AND_CHG, :i!~IJ B024703 U~ ENABLE, fF~1t:1:@.1~~M~ 5). As shown in figure 13-5,the small current +VBATR is sent to 22 pin VCC of BQ24703 to be Ole power supply,+VADPBL through the resistance R27,R26.R31 series partial pressure,and added to 5 pin ofthe comparator Ul,to compare with the voltage of2VREF.lfthe voltage of +VADPBL is higherthan lO.87V,the 7 pin of the comparator UI will open drain output and the adapter is inselied the detection signal ADP]RES,is pulled up to be the high level by +V3AL through R89.ADP]RES through the resistance R91 to send to ACDET pin of BQ24703,is higher than the intemal threshold value .246V,BQ24703 is identified to be the state of the adapter inserted,and outputs the low level of _DRV# the G pole of Q514 is conducted after getting the low level through the resistance R565 and ~Pf;Il~'aJ pressure,the large current common point +VBATR is produced(the comparator also outputs signal AC_AND_CHG from 1 pin,sends to ENABLE of BQ24703.as the charging ... -\"-'\" ,1UF Scanned by CamScanner