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| data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev . 1 - 3 1 of 23 www.diodes.com october 2014 ? diodes incorporated not recommended for new design general description the AUR9807 is a single - cell li - ion charger ic with system power management feature. it charges the battery and power the system simultaneously. the maximum charging current (up to 1.5a) is set by external resistor for fast char ging. the output voltage for the system is regulated to a nominal value (three different versions available: 4.4v, 5v or 6v); the actual value of the output voltage depends on the input voltage from the adapter, the charging current and the system loading. with the decrease of the input voltage or the increase of the system loading current, the output voltage drops. when the output voltage drops to a predetermined value (v apm - reg ), the active power management function is activated and tries to maintain the output voltage at v apm - reg ; the AUR9807 will suffice the system loading with first priority and reduce the charging current temporarily, i.e. under heavy load condition, the AUR9807 charges the battery with the remaining available current to keep the outpu t voltage at v apm . in this manner, the charge and discharge cycle of the battery can be reduced. it is possible that the AUR9807 fails to maintain the output voltage at v apm - reg ; for example, when the system loading current exceeds the capability of the c urrent - limiting ac adapter. in this scenario, the output voltage drops to the battery voltage, and the system is allowed to draw current from the battery. the AUR9807 is available in q fn - 4.53.5 - 20 package. features ? q fn package ? active powe r management (apm) for simultaneously powering the system and charging the battery ? total current supported up to 2 amperes (system loading having higher priority on the budget) ? automatic power source selection (ac adapter or battery) ? 40m power path for the battery to supply the system power efficiently ? junction temperature detection and thermal regulation during charging process ? external led indicating charger and power good status as w ell as fault condition ? thermal, short - circuit, a nd reverse current protection ? short - circuit protection in the low power consumption sleep mode ? sysoff function to cut off the path b etween the system and the battery ? buil t - in over voltage protection up to 18v applications ? battery - powered devices or equipment ? mobile phones, digital cameras and mp3 players ? radios, o ther hand - held games and instruments ? solar power system figure 1 . package t ype of a ur9807 q fn - 4.53.5 - 20
data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 2 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design pin configuration d package ( q fn - 4.53.5 - 20 ) figure 2 . pin configuration of a ur9807 (top view) e x p o s e d p a d 1 2 3 4 5 1 0 9 8 6 1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1 2 0 p i n 1 m a r k 7 v r e f s t a t 1 s t a t 2 i n b a t b a t i s e t 2 m o d e c e i s e t 1 s y s o f f t s a p m t m r o u t / p g g n d g n d o u t o u t data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 3 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design pin description pin number i/o pin name function 1 o vref internal reference; vref output capacitor not required, but one with a value of 0.1f is recommended. 2 o stat1 charge status flag 1 (open - drain) 3 o stat2 charge status flag 2 (open - drain) 4 i in chip input vo ltage 5 , 6 i/o bat battery connection; charging or discharging all through this pin 7 i iset2 usb mode total current selection (high=450ma, low= 90ma) and ac mode charge current selection (high=full current, low=half current) 8 i mode set AUR9807 in ac (high) or usb(low) mode 9 i ce chip enable (active high) 10 i/o iset1 set the maximum charging current 11 i sysoff cut off the power path between the battery and the output pin 12 i/o ts battery temperature sensing 13 i apm active power management set point no need for capacitors 14 i/o tmr timer program by external resistor connected to this pin. tying tmr and vref together to disable the safety timer 15 , 16 , 17 o out system output 18 o /pg power - good status flag (open - drain) 19 , 20 i gnd chi p ground data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 4 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design functional block diagram figure 3 . functional block diagram of AUR9807 c h a r g e c o n t r o l t i m e r a n d d i s p l a y l o g i c a c c h a r g e e n a b l e b a t c h a r g e e n a b l e 5 0 0 m a / 1 0 0 m a f a s t p r e c h a r g e v o u t i s e t 2 / p g s t a t 1 s t a t 2 1 c - 5 0 0 m a c / s - 1 0 0 m a v i n v b a t s l e e p v t e r m v i ( i s e t 1 ) t e r m a t i o n v l o w v v b a t p r e c h a r g e v r c h v b a t r e c h a r g e c e m o d e 1 v p o w e r s o u r c e s e l e c t i o n t s v l t f t h e r m a l s h u t d o w n v h t f a p m 1 v i n q 1 o u t q 2 v r e f 3 . 3 v s h o r t - c i r c u i t r e c o v e r y b a t i s e t 1 v o u t v s e t 1 0 0 m a 5 0 0 m a p o w e r s o u r c e s e l e c t i o n v i s e n s e t m r o s c i l l a t o r v o u t ( r e g ) i s e n s e g n d u v l o f a u l t r e c o v e r y v b a t b a t s h o r t - c i r c u i t r e c o v e r y t j ( r e g ) t j v a p m v s e t v s e t v i ( i s e t 1 ) v b a t ( r e g ) v b a t i a m p v i ( i s e t 1 ) s y s o f f v o u t v b a t i t s 1 2 3 4 5 , 6 7 8 9 1 0 1 1 1 2 1 3 1 4 1 5 , 1 6 , 1 7 1 8 1 9 , 2 0 data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 5 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design g: green ordering information AUR9807 c ircuit type package temperatur e range output voltage part number marking id packing type qfn - 4.5x3.5 - 20 - 40 to 85 ? c 4.4v , cv mode AUR9807vfgd a9807vfg tape & reel 4.4v , done AUR9807dfgd a9807dfg tape & reel 5 v , cv mode AUR9807vigd a9807vig tape & reel 5 v , done AUR9807digd a9807dig tape & reel 6 v , cv mode AUR9807vsgd a9807vsg tape & reel 6 v , done aur980 7dsgd a9807dsg tape & reel bcd semiconductor's pb - free products, as designated with " g " in the part number, are rohs compliant and green. d : qfn - 4.5x3.5 - 20 output voltage vf : 4.4v, cv mode df: 4.4v, done vi : 5v, cv mode di : 5v, done vs: 6v, cv mode d s : 6v, done cv mode: after charge done, charger will stay in constant voltage mode until time out. done: after charge done, charger will shut down until the battery voltage drops below the battery recharge threshold. data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 6 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design absolute maximum ratings (note 1) parameter symbol value unit supply input voltage v in - 0.3 to 18 v in put voltage v b at , v ce , v apm , v /pg , v mode , v out , v iset1 , v iset2 , v stat1 , v stat2 , v ts - 0.3 to 7 v v ref - 0.3 to v out + 0.3 v v tmr - 0.3 to v out + 0.3 v input c urrent i in 3.5 a output c urrent i out 4 a i bat - 4 to 1.5 a output s ource c urrent (in r egulatio n at 3.3v v ref ) i ref 30 ma output s ink c urrent i /pg , i stat1 , i stat2 15 ma thermal resistance (junction to ambient) ? ja 52 c/w storage t emperature t stg - 65 to 150 c junction t emperature t j - 40 to 150 c lead t emperature (soldering, 10 s econds) 300 c esd ( human body mode l) v hbm 2000 v esd ( machine mode l) v mm 200 v note 1: stresses greater than those listed u nder absolute maximum ratings may cause permanent damage 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 ratings for extended periods may affect device reliability. recommended operating conditions parameter symbol min max unit supply v oltage AUR9807dsgd, AUR9807vsgd v in 4.35 6.3 v AUR9807dfgd, AUR9807vfgd, AUR9807digd, a ur9807vigd 4.35 5.5 v input c urrent i in 2 a operating j unction t emperature r ange t op - 40 125 c data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 7 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design electrical characteristics t a =25 o c , v in is within the recommended range, unless otherwise specified. parameter symbol test condition min typ max unit active s upply c urrent i in(sply) v in >4.35v 1.1 2 ma sleep m ode current into bat p in i bat(slp) v in < v bat , 2.6v< v bat < v bat(reg) no load at out pin 2.5 5 a in(stdby) v in < 6v, total current flow into in pin with ce pin low; no load 200 a bat(stdby) total current flow into bat pin with input source present and ce pin low 45 65 a bat(term) current flows into bat pin after the termination of the charging process 1 5 a q1,q2 drop - out voltage in to out d ropout v oltage v do(in - out) mode= high , i in = 1a 300 475 mv bat to out d ropout v oltage v do(bat - out) v bat > 4v , i bat = 1a 40 10 0 mv voltage regulation regulation v out 9807vf 9807df v out(reg) v in >4.4v+ v do(in - out) 4.4 4.5 v regulation v out 9807vi 9807di v out(reg) v in >5v+ v do(in - out) 4.9 5.1 v regulation v out 9807vs 9807ds v out(reg) v in >6v+ v do(in - out) 6 6.3 v apm regulation apm s et p oint v apm - set v apm - set < v out 2.6 3.8 v apm c urrent s ource i apm - set input present 95 100 105 a apm - reg = v apm - set x sf 1.139 1.15 1.162 battery supplement mode run b attery s upplement m ode v bsup1 v bat > 2v v out < v bat C bsup2 v bat > 2v v out > v bat C charging - precharge precharge to f ast - charge t ransition v oltage v lowv voltage on bat 2.9 3 3.1 v precharge c urrent r ange i prechg 10 150 ma data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 8 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design electrical characteristics (continued) t a =25 o c , v in is within the recommended range, unless otherwise specified. parameter symbol test condi tion min typ max unit precharge s et v oltage v prechg 225 250 275 mv de - glitch t ime b etween f ast c harge and p recharge t ransition t dglf t fall = 100ns, 10mv overdrive, v bat decreasing below threshold 22.5 ms charging - current regulation fast c harge c urren t r ange i chg v bat > v lowv , m ode =high 100 1000 1500 ma bat to out p ull - up r pbat v bat < 1v 1000 battery c harge c urrent s et v oltage (1) v set voltage on iset1 2.4 2.5 2.6 v charge c urrent s et f actor k set 100 ma< i chg < 1.5a 375 425 450 10 ma< i chg < 100ma 300 45 0 600 usb mode input current limit usb i nput c urrent r ange i usb iset2= high 400 500 ma iset2= low 80 90 100 charging voltage regulation battery - charge - voltage v bat(reg) 4.2 v battery c harge v oltage regulation a ccuracy t a = 25c - 0.5 0.5 % - 1 1 % charge termination detection charge d one d etection c urrent i term v bat >v rch , i term =(k set x v term )/ r set 10 150 ma charge d one s et v oltage, m easured on iset1 v term v bat > v rch , m ode = high 230 250 270 mv v bat > v rch , m ode = low 95 100 130 temperature sense comparators high v oltage, l ow t emperature t hreshold v ltf temp fault at v ts > v ltf 2.5 v low v oltage , h igh t emperature t hreshold v htf temp fault at v ts < v htf 0.5 v current s ource for t emperature s ense i ts 95 100 105 a battery recharge thresho ld recharge t hreshold v oltage v rch v bat(re g) - 0.125 v bat(re g) - 0.1 v bat(re g) - 0.075 v (1) for half - charge rate, v set is 1.25v. data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 9 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design electrical characteristics (continued) t a =25 o c , v in is within the recommended range, unless otherwise specified. paramete r symbol test condition min typ max unit stat1, stat2, and / pg low - level o utput s aturation v oltage v ol i ol = 5ma, requiri ng an external pull - up resistor > 1 k 0.25 v input l eakage c urrent i lkg 1 5 a iset2, ce ce p in hold - off t ime t ce - hldof f ce fall low only 4 6 ms low - level i nput v oltage v il 0 1.1 v high - level i nput v oltage v ih 1.5 ce p in low - level i nput c urrent i il 1 - 1 a ce p in high - le vel i nput c urrent i ih 1 1 iset2 p in low - level i nput c urrent i il 2 v iset2 = 0.4 v - 20 iset2 p in high - level i nput c urrent i ih 2 v iset2 = v in 40 mode m ode pin low - level i nput v oltage v il falling hilow; 280k?10% applied when low 0.975 1 1.025 v m od e pin high - level i nput v oltage v ih input r mode sets external hysteresis v il + 0.01 v il + 0.024 v m ode pin low - level i nput c urrent i il - 1 a timers timer s et f actor k tmr t chg = k tmr x r tmr 0.313 0.36 0.414 s/? external r esistor l imits r tmr 30 100 k? precharge t imer t prechg 0.115 x t chg 0.125 x t chg 0.135 x t chg s timer f ault r ecovery p ull - up from out to bat r fault 1 k? time o ut e xtension f actor1 k ext1 the actual charge current less than 50% of maximum fast charge current 2 time o ut e xtensi on f actor2 k ext2 the actual charge current less than 25% of maximum fast charge current 4 data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 10 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design electrical characteristics (continued) t a =25 o c , v in is within the recommended range, unless otherwise specified. parameter symbol test condition min typ max unit charger sleep thresholds sleep - mode e ntry t hreshold v slpent v bat +0.125 mv sleep - mode e xit t hreshold v slpexit v bat +0.195 de - glitch time de - glitch t ime for c harge d one d etection, t emperature f ault, r echarge and s leep m ode d etection t deg 18.75 ms start - up control boot - up boot - up t ime t boot - up on the first application of input low 120 150 180 ms switching power source timing switching p ower s ource from i nput to b attery t sw - bat when input applied. measure from: [ /pg: lo hi to i in > 5 ma ] 50 s thermal shutdown regulation temperature t rip t shtdwn t j (q1 and q3 only) 150 c thermal h ysteresis t j (q1 and q3 only) 25 temperature r egulation l imit t j(reg) t j (q2) 110 130 uvlo under - voltage l ockout v uvlo decreasing v in 2.45 2.5 2.65 v input p ower d etection t hreshold v in(dt) input power detected when v in > v bat + v in(dt) v bat = 3.6v v in : 3.5v 4v 55 80 130 mv hysteresis 27 mv vref output output r egulation v oltage v ref active only if adp or usb is present 3.3 v regulatio n a ccuracy - 5 +5 % output c urrent i ref 20 ma on r esistance r ds(on) out to vref 50 ? output c apacitance c out 1 f data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 11 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design electrical characteristics (continued) t a =25 o c , v in is within the recommended range, unless otherwise specified. short circu it protection short - circuit r ecovery b etween bat to out i osh1 pull - up source from bat to out for short - circuit recovery v out < v bat C 200 mv 10 ma in to out s hort - circuit p rotection r shac v out < 1v 500 output s hort - circuit d etection t hreshold, p ower - on v out(sc1) v in > v uvlo and v in > v bat + v in(dt) 0.9 1 1.1 v output s hort - circuit d etection t hreshold, s upplement mode (v bat C v out )> v out(sc2) i ndicates s hort - circuit v out(sc2) v bat > 2.5v 160 200 240 mv deglitch t ime, s upplement m ode s hort c ircuit t dgl(sc2) 512 s maximum s hort - current for v bat > v out i short ( 2 ) v bat > 2.5v 9 a ( 2 ) f or short current> i short , short - protection may not work due to avalanche breakdown phenomenon. typical performance characteristics figure 4. output voltage vs. output current figure 5. output voltage vs. charge current data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 12 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design typical performance characteristics (continued) figure 6. charge current vs. input voltage figure 7 . power on figure 8 . sysoff floating figure 9 . mode p in p ull l ow v in 2 v /div v in 2 v /div v out 2 v /div i chg 0.5a /div v out 2 v /div i chg 1a /div v sysoff 2 v /div time 20 m s/div time 1 m s/div v out 2 v /div v in 2 v /div i chg 0.5 a /div v mode 2 v /div time 200 ? s/div data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 13 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design typical performance characteristics (continued) figure 10 . iset2 p in p ull h igh figure 1 1 . iset2 p in p ull l ow figure 1 2 . mode p in p ull h igh v out 2 v /div v in 2 v /div i chg 0.5a /div v iset2 2 v /div v out 2 v /div v in 2 v /div i chg 0.5a /div v iset2 2 v /div v out 2 v / div v in 2 v /div i chg 0.5a /div v mode 2 v /div time 40 ? s/div time 40 ? s/div time 400 ? s/div data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 14 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design p ower f low the AUR9807 selects the power source automatically. in the absence of the input source (ac adapter or usb), the battery is chosen to power the system. under this c ircumstance, the AUR9807 consumes less than 5 ampere; the power path resistance from the battery to the system is only 40m ( 3 ) ; all these guarantee a high efficiency and elongate the battery discharge time. with this st ringent sleep current budget (< 5a) , the AUR9807 is still able to detect an output short condition and cuts off the power path between the battery and the system under short condition. with the input power present, the mode pin sets the AUR9807 in adapter mode or usb mode. in adapter mode, the AUR9807 does not limit the total current directly , current limiting phenomenon occurs through adaptive power management in response to the output voltage drop. the resistor connected to iset1 pin sets the maximum charging current. this maximum chargin g current can be halved by pulling down the iset2 pin. in usb mode, the AUR9807 will limit the total current within 450ma (iset2=high) or 90ma (iset2=low). t he maximum charging current is still set by the resistor connected to iset1 pin; however, because o f this current limiting feature, the actual charging current is usually less than 450ma (or 90ma). (3) q2 design value is 40m?. power source selection and charge current setting mode pin level ac adapter loading power source charge current setting low yes usb iset1, limitation depends on iset2 setting no battery n/a high yes ac adapter iset1, half c harging rate by setting iset2 to low no battery n/a a u r 9 8 0 7 q 1 q 2 i n o u t b a t v d c a c a d a p t e r ( o r u s b ) o u t r e f + - 4 0 m a u r 9 8 0 7 q 1 q 2 i n o u t b a t s y s t e m v d c a c a d a p t e r ( o r u s b ) o u t r e f + - 4 0 m data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 15 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design charge function descriptions charge flow maximum charging current setting pre - charge and charge done current setting mode=high iset2=high mode=high iset2=low mode=low iset2=high/l ow t i m e v b a t = 3 v v b a t = 4 . 2 v c o n s t a n t c u r r e n t p h a s e c o n s t a n t v o l t a g e p h a s e c h a r g e c u r r e n t = 0 . 1 x i c h g c h a r g e d o n e t i m e r t i m e o u t v b a t = r e c h a r g e t h r e s h o l d c h a r g e d o n e c u r r e n t v o l t a g e c h a r g e c u r r e n t = i c h g p r e c h a r g e r e c h a r g e p r o c e s s 2.5 v , r k v i max set, set set set chg ? ? ? m ode ac ; 10 i i ; 10 i i max chg, term max chg, prechg ? ? 1.25 v , r k v i max set, set set set chg ? ? ? m ode ac ; 20 i i 20 i i max chg, term max chg, prechg ? ? 2.5 v , r k v i max set, set set set chg ? ? ? m ode usb ; 25 i i 10 i i max chg, term max chg, prechg ? ? data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 16 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design charge function descriptions (continued) the maximum charging current, the pre - charge current and charge done current setting are given in the above table. the charging process begins with a pre - charge phase; when the battery voltage reaches the pre - charge threshold v lowv , the charger enters the constant current mode. at this stage, the charger tries to charge the battery with the maximum charging current (a constant); however, the actual charging current may be lower due to active power management activated by large system loading or insufficient input current capability. the therma l fold - back mechanism also reduces the actual charging current when the junction temperature is over 110c. the battery voltage rises gradually with the constant current entering the battery. when the battery voltage reaches v bat(reg) , the charger enters the constant voltage mode. at this stage, the charger keeps the battery voltage at v bat(reg) with a decreasing charging current. when the charging current drops below the charge done current setting, nominally the charging process is complete (this can be observed from the external indicator). depending on different versions, after the charge done status indicated, the charger will stop providing charging current completely or stay in constant voltage mode till time out. when the battery voltage drops below the recharge threshold, a new charge cycle begins. example: with a r set =1k , the maximum charging current is about 1a for iset2=high and 0.5a for iset2=low. the pre - charge current i prechg is 100ma. the charge done current setting is 100ma for ac mode and 40ma for usb mode. note the absolute values of pre - charge current and charg e done current setting do not vary with iset2. power source selecting i. v in < v bat : v out =v bat C v do(bat - out) ii. v bat < v in < v out(reg) : v out =v in C v do(in - out) iii. v out(reg) + v do(in - out) < v in < 6v : v out = v out(reg) iv. 6v < v in : v out = v bat C v do(bat - out) the AUR9807 selects power source automatically depending on the voltage present at the input. when v in is lower than v bat , the battery is responsible to power the system. the output voltage v out is v bat C v do(bat - out) . when the input voltage v in is high er than v bat and lower than 6v, the input source is used to supply the system power; the output voltage depends on v in . when v in is lower than v out(reg) , the output voltage v out is v in C v do(in - out) ; when v in is high enough, which means that v in > (v out(reg) + v do(in - out) ), the output voltage is regulated at v out(reg) . when the input voltage v in is higher than 6v, the current path between in and out is cut off to protect the chip; AUR9807 therefore selects the b attery as the power source; the output voltage v out is then v bat C v do(bat - out) . a u r 9 8 0 7 q 1 q 2 i n o u t b a t s y s t e m v d c a c a d a p t e r o u t r e f + - 4 0 m data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 17 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design charge function descriptions (continued) active power management (apm) ? ac mode (mode=high) i. v apm - reg < v out : normal mode; i chg determined by r set ii. v bat < v out < v apm - reg : apm mode ; i chg = i supply max C i out iii. v out data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 18 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design charge function descriptions (continued) the AUR9807 interrupts the charging process when the battery temperature is out of normal range. i t provides a 100a sensing current to the negative - temperature coefficient resistor (on the battery side) through the ts pin. the battery protection is achieved by constantly monitoring the voltage at the ts pin. when this voltage is higher than v ltf (nomi nally 2.5v) or lower than v htf (nominally 0.5v), an under - temperature or over - temperature condition is detected. for a n usual 103at - type ntc resistor, the corresponding temperature range is between 0c and 45c. the normal battery temperature range can be modified by adjusting the ntc resistor or by adding extra resistor network between the ts pin and the negative - temperature coefficient resistor. the charging process would resume after the battery temperature goes back within the normal range. charge time out setting the charge timeout setting is programmed by the resistor r tmr connected between the tmr and ground pin. the timeout setting is given by: t chg = k tmr r tmr a suggested 36k r tmr gives a 3.6 hrs timeout setting because the nominal value of k tm r is 0.36 sec/. in the actual charging process, the charging duration is elongated if the charging current can not reach the maximum current setting (again this relates to system loading and environment temperature); therefore, it is possible that the cha rging process is still on progress while the 3.6 hrs timeout limit has been reached. to circumvent this problem, the actual charging current is monitored and the clock rate of the timer counter is halved if the charging current is less than 50% of the maxi mum fast charging current. this is equivalent to modify the timeout setting temporarily by the following equation: t chg = k ext1 x k tmr r tmr , where k ext1 = 2 if the actual charging current is less than one fourth the maximum fast charging current, the tim e out counter rate is reduced to 25%. the temporary timeout setting is given by: t chg = k ext2 x k tmr r tmr , where k ext2 = 4 once the abnormal condition is removed (high temperature or heavy loading), the charging current resumes the maximum values (set by r set ), and the time out counter will operate in normal rate. charge status indicator status stat1 stat2 pre - charge on on constant current and constant voltage charge on off charge done off on fault condition (time out , sleep mode , or otp) off off the open drain pins stat1 and stat2 provides the information about the charger status when the ce pin (chip enable) is set to high. the various charger status and the corresponding stat1 and stat2 levels are given in the above table. connect these pins to the host processor or leds to indicate the charger status. short circuit protection AUR9807 provides short circuit protection for both the input and the battery. when v in is larger than v bat , ac adapter (or usb port) is chosen as the power source. if the output voltage is lower than 1v (v out(sc1) ) for more than t dgl(sc) , a short circuit condition is detected; the power path between the input and the output will be cut off. the charging process will be interrupted. a 500 resistor is used to pull up the out put voltage; if the load at the output is removed, the output voltage can be pulled up and the short circuit condition is dissolved. similarly, when the battery is chosen as the power source, an output voltage lower than the battery voltage by 200mv (v out (sc2) ) longer than t dgl(sc) will trigger the short circuit protection mechanism (this corresponds to a 5a loading current). a 10ma current source is used to pull up the output and detect the removal of the short condition. the power consumption is less tha n 5a under the battery supply mode; however, AUR9807 is still able to monitor the output voltage and detect a short circuit condition with this limiti ng current budget. sysoff function the sysoff function is used to cut off the power path between the bat tery and the output. this means the data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 19 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design charge function descriptions (continued) charger function can be disabled by pulling up the sysoff pin; in this mode, the AUR9807 is almost a regulator to power the system. because the power path is cut off, the outp ut voltage will drop to zero when the input source is removed, the battery will not be used to power the system. the sysoff pin is pulled high internally; therefore, this pin should be pulled to ground for normal operation. recharge process and timer faul t elimination if timeout occurs and the battery voltage is higher than the recharge threshold, the charger will stay in the charge done mode until the battery voltage drops below the recharge threshold. once the battery voltage drops below the recharge thr eshold, a new charge cycle starts. if timeout occurs and the battery voltage is lower than the recharge threshold, the charger will indicate a fault condition and an internal resistor between output and battery will try to pull up the battery voltage. i f the internal resistor is unable to pull up the battery voltage to the recharge threshold, the charger will stay in fault condition. once the battery voltage is higher than the recharge threshold, the charger removes the pull - up resistor, leaves the fault condition and stay in the charge done mode temporarily. the charger then waits the battery voltage to drop below the recharge threshold and starts a new charge cycle. data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 20 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design pc board layout considerations it is important to pay spec ial attention to the pcb layout. the following provides some guidelines . 1. to obtain optimal performance, the decoupling capacitor from the input terminal to gnd and the output filter capacitor from out to gnd should be placed as close as possible to the AUR9807, with short trace runs to both signal and gnd pins. 2. all low - current gnd connections should be kept separate from the high - current charge or discharge paths from the battery. use a single - point ground technique incorporating both the small sign al ground path and the power ground path. 3. the high - current charge paths into in and from the bat and out pins must be sized appropriately for the maximum charge current in order to avoid voltage drops in these traces. figure 1 3 . the evaluation board schematic v b a t r 6 1 0 0 k r 1 0 1 0 k j p 1 1 2 3 r 1 3 / o p t u 1 a u r 9 8 0 7 1 2 3 4 5 6 1 1 1 2 9 1 0 8 7 1 8 1 7 1 6 1 5 1 4 1 3 1 9 2 0 v r e f s t a t 1 s t a t 2 i n b a t b a t s y s o f f t s c e i s e t 1 m o d e i s e t 2 / p g o u t o u t o u t t m r a p m g n d g n d l e d 1 - g r e e n s t a t 1 j p 5 1 2 3 v i n c 2 1 0 f / 3 5 v c 1 0 . 1 f r 1 6 1 k t p 4 t m r v o u t c 3 1 f l c e h r 1 4 3 0 k c 7 / o p t r 4 1 0 0 k l m o d e h h j p 4 1 2 3 l i s e t 2 h j p 2 1 2 3 d 1 5 . 1 v z e n e r r 9 1 0 k t p 1 i s e t 1 r 1 5 5 0 k v o u t + 5 v r 5 1 0 0 k c 6 / o p t v o u t v i n j p 3 1 2 3 r 8 1 k r 3 1 k r 7 1 0 0 k r 2 1 k r 1 1 2 7 k c 4 1 0 f / 1 6 v l e d 3 - g r e e n / p g c 5 / o p t h l s y s _ o f f h t p 3 a p m r 1 1 k t p 2 t s h r 1 2 2 0 k l e d 2 - r e d s t a t 2 data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 21 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design pc board layout considerations (continued) figure 1 4 . top side view of the evaluation board figure 1 5 . bottom side view of the evaluation board data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 22 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design typical applicati on figure 1 6 . t ypical application of AUR9807 2 4 5 6 8 9 7 1 0 1 1 1 3 1 2 1 4 1 6 1 7 1 8 1 9 1 5 3 r t m r r a p m r s e t 1 0 f s y s t e m i n v r e f i s e t 2 s t a t 1 / p g c e m o d e g n d s y s o f f t m r a p m i s e t 1 t s b a t o u t c o n t r o l s i g n a l s a n d s t a t u s i n d i c a t o r s s t a t 2 b a t g n d a d a p t e r o r u s b b a t t e r y 1 2 0 o u t o u t n t c 1 f 1 0 f data s heet single - cell li - ion charger ic with system power management AUR9807 aur98 07 document number: ds 37580 rev. 1 - 3 23 of 23 w ww.diodes.com october 2014 ? diodes incorporated not recommended for new design mechanical dimensions qfn - 4. 5 3.5 - 20 unit: mm (inch) n 2 0 n 1 n 2 n 9 n 1 1 n 1 0 n 1 9 n 1 2 b s c 4 . 5 0 0 ( 0 . 1 7 7 ) 3 . 5 0 0 ( 0 . 1 3 8 ) b s c 0 . 7 0 0 ( 0 . 0 2 7 ) 0 . 8 0 0 ( 0 . 0 3 1 ) p i n 1 m a r k 1 . 9 5 0 ( 0 . 0 7 7 ) 2 . 1 0 0 ( 0 . 0 8 3 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 5 0 0 ( 0 . 0 2 0 ) 2 . 9 5 0 ( 0 . 1 1 6 ) 0 . 1 8 0 ( 0 . 0 0 7 ) 0 . 3 0 0 ( 0 . 0 1 2 ) 0 . 5 0 0 ( 0 . 0 2 0 ) b s c 0 . 0 0 0 ( 0 . 0 0 0 ) 0 . 0 5 0 ( 0 . 0 0 2 ) 0 . 2 0 0 ( 0 . 0 0 8 ) r e f 1 . 5 0 0 ( 0 . 0 5 9 ) b s c 3 . 1 0 0 ( 0 . 1 2 2 ) important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yishan road, shanghai 200233, china tel: +021-6485-1491, fa x: +86-021-5450-0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manu facturing co., ltd., shenzhen office unit a room 1203,skyworth bldg., gaoxin ave.1.s., nanshan district shenzhen 518057, china tel: +86-0755-8660-4900, fax: +86-0755-8660-4958 taiwan office (taipei) bcd semiconductor (taiwan) company limited 3f, no.17, lane 171, sec. 2, jiu-zong rd., ne i-hu dist., taipei(114), taiwan, r.o.c tel: +886-2-2656 2808 fax: +886-2-2656-2806/26562950 taiwan office (hsinchu) bcd semiconductor (taiwan) company limited 8f, no.176, sec. 2, gong-dao 5th road, east district hsinchu city 300, taiwan, r.o.c tel: +886-3-5160181, fax: +886-3-5160181 - headquarters bcd (shanghai) micro-electronics limited no. 1600, zi xing road, shanghai zizhu scie nce-based industrial park, 200241, p. r.c. tel: +86-021-2416-2266, fax: +86-021-2416-2277 usa office bcd semiconductor corp. 48460 kato road, fremont, ca 94538, usa tel: +1-510-668-1950 fax: +1-510-668-1990 korea office bcd semiconductor limited korea office. room 101-1112, digital-empire ii, 486 sin-dong, yeongtong-gu, suwon-city, gyeonggi-do, korea tel: +82-31-695-8430 important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing co., ltd. 800 yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd., shenzhen office unit a room 1203, skyworth bldg., gaoxin ave.1.s., nanshan district, shenzhen, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corp. 30920 huntwood ave. hayward, ca 94544, usa tel : +1-510-324-2988 fax: +1-510-324-2788 - headquarters bcd semiconductor manufacturing limited no. 1600, zi xing road, shanghai zizhu sc ience-based industrial park, 200241, china tel: +86-21-24162266, fax: +86-21-24162277 important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited important notice bcd semiconductor manufacturing limited reserves the right to make changes without further not ice to any products or specifi- cations herein. bcd semiconductor manufacturing limited does not as sume any responsibility for us e of any its products for any particular purpose, nor does bcd semiconductor manufacturi ng limited assume any liability aris ing out of the application or use of any its products or circui ts. bcd semiconductor manufacturing limited does not convey any license under its patent rights or other rights nor the rights of others. - wafer fab shanghai sim-bcd semiconductor manufacturing limited 800, yi shan road, shanghai 200233, china tel: +86-21-6485 1491, fax: +86-21-5450 0008 bcd semiconductor manufacturing limited main site regional sales office shenzhen office shanghai sim-bcd semiconductor manuf acturing co., ltd. shenzhen office advanced analog circuits (shanghai) corporation shenzhen office room e, 5f, noble center, no.1006, 3rd fuzhong road, futian district, shenzhen 518026, china tel: +86-755-8826 7951 fax: +86-755-8826 7865 taiwan office bcd semiconductor (taiwan) company limited 4f, 298-1, rui guang road, nei-hu district, taipei, taiwan tel: +886-2-2656 2808 fax: +886-2-2656 2806 usa office bcd semiconductor corporation 30920 huntwood ave. hayward, ca 94544, u.s.a tel : +1-510-324-2988 fax: +1-510-324-2788 - ic design group advanced analog circuits (shanghai) corporation 8f, zone b, 900, yi shan road, shanghai 200233, china tel: +86-21-6495 9539, fax: +86-21-6485 9673 bcd semiconductor manufacturing limited http://www.bcdsemi.com bcd semiconductor manufacturing limited |
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