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data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 1 general description the AUR9801C is a highly-integrated battery charger for single-cell li-ion or li-polymer batteries capable of operating with an input voltage reached 2.5v. it is a complete charger device designed to work with an usb port or 5v output ac adapter. the AUR9801C operates with cc (constant current) mode and cv (constant voltage) mode profiles. a low-current preconditioning charge mode is also provided as a trickle charging operation. the charge current is programmable up to 1a with an external resistor or a logic input. the charge voltage is 1% accurate over the full application range. when operating with a current-limited adapter, the charger minimizes the thermal dissipation with pulsed operations to prevent overheat conditions that is commonly occurred with conventional linear chargers. the AUR9801C reduces charge current for thermal fold-back to ensure product safe operation. the charger automatically re-charges the battery when the battery voltage drops blow a recharge threshold. the chip includes a safety timer for setting the fast charge time limit in case of charging a dead battery. the AUR9801C is available in standard wdfn-33-10 package. features ? complete charger for single-cell li-ion batteries ? charges from either ac adapter or usb port ? integrated power pass device with current sensing ? no external blocking diode required ? pre-charge condition with safety timing ? 1% charger voltage accuracy ? programmable current limit up to 1a ? sleep mode for power saving ? charge current thermal fold-back ? stand-alone or integrated charger ? ambient temperature range: -40c to 85c ? thermally-enhanced wdfn-33-10 package ? pb-free plus anneal available (rohs compliant) applications ? pdas, cell phones and smart phones ? digital camera, mp3 and handheld gamming ? portable instruments including medical handhelds ? self-charging battery packs ? stand-alone chargers or usb port chargers figure 1. package type of AUR9801C wdfn-3 3-10
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 2 pin configuration d package wdfn-33-10 figure 2. pin configuratio n of AUR9801C (top view) pin functions pin number pin name pin type function 1 vin power charger input supply voltage 2 o active-low, open-drain output, capable of sinking 5ma current 3 o open-drain pin to show charging and inhibit states, capable of sinking 5ma current 4 time i timing capacitor pin for conn ecting a capacitor to set internal clocking and ch arger time reference 5 gnd ground ground pin 6 en i chip enable control, high to activate the chip with internal 880k ? pull-up resistor 7 v2p8 o 2.8v reference voltage output, capable of driving up to 2ma 8 iref i a resistor can be connected at the pin to set the charge current 9 vsen i vsen is the remote voltage sense pin. connect to battery positive node 10 vbat o connection to the battery positive node
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 3 functional block diagram en fault status vbat vin v2p8 iref vsen time gnd counter osc voltage / current reference temp control charger control vsen block current sense 1 7 8 9 4 5 6 2 3 10 status fault figure 3. functional block diagram of AUR9801C ordering information aur9801 circuit type d: wdfn-33-10 charge voltage g: green c: 4.256v package temperature range part number marking id packing type wdfn-33-10 -40 to 85 c AUR9801Cgd 9801c type & reel bcd semiconductor's pb-free products, as designated with "g" suffix in the part number, are rohs compliant and green.
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 4 absolute maximum ratings (note 1) parameter symbol value unit supply input voltage v in -0.3 to 6.5 v enable input voltage v en -0.3 to v in +0.3 v output voltage v bat -0.3 to v in +0.3 v other pin voltage -0.3 to v in +0.3 v thermal resistance (simulation) ja 45.13 c/w operating junction temperature t j 160 c storage temperature t stg -65 to 150 c esd withstand voltage (human body model) v hbm 2000 v esd withstand voltage (machine model) v mm 200 v note 1: stresses greater than those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional op eration of the device at these or any other conditions beyond those indicated under ?recommended operating co nditions? is not implied. exposure to ?absolute maximum ratings? for extended periods may affect device reliability. recommended operating conditions parameter symbol min max unit supply voltage v in 4.6 5.5 v ambient temperature range t a -40 85 c
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 5 electrical characteristics v in =5v and t a =25c for the typical values. the maximum and minimum values are over -40c to 85c ambient temperature with a supply voltage in the range of 4.6v to 5.5v, unless otherwise specified. parameter symbol conditions min typ max units power-on reset vin rising voltage 3.2 3.6 3.9 v vin falling voltage 2.25 2.5 2.7 v standby current vbat pin sink current i standby vin floating or en=low 3.3 a vin pin supply current i in vbat floating and en pulled low 150 a vbat floating and en floating 1 ma vin-vbat offset voltage offset voltage v os v bat =4.2v, i bat =20ma, use /status pin 45 80 100 mv voltage regulation output voltage v bat tested at 50ma load, 5v input, and 25 c 4.213 4.256 4.299 v dropout voltage v bat =4.0v, charge current=0.35a 175 mv charge current constant charge current i chg r iref =100k ? ? ? 70 80 90 ma v2p8 pin output v2p8 pin output voltage v 2p8 load current less than 1ma 2.8 2.9 3.0 v recharge threshold recharge threshold v rechg 3.97 4.05 4.13 v recharge threshold hysteresis v rechghy s 50 mv trickle charge threshold trickle threshold voltage v min 2.7 2.8 2.9 v trickle threshold hysteresis v minhys 50 100 150 mv
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 6 electrical characteristics(continued) v in =5v and t a =25c for the typical values. the maximum and minimum values are over -40c to 85c ambient temperature with a supply voltage in the range of 4.6v to 5.5v, unless otherwise specified. parameter symbol conditions min typ max units temperature monitoring fold-back threshold t fold 107 c oscillator oscillation frequency f osc c time =15nf 305 333 370 hz logic input and output en pin logic input high 1.5 v en pin logic input low 0.8 v en pin internal pull-up resistance 880 k ? /status, /fault output voltage 10ma current 0.8 v
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 7 typical performance characteristics v in =5v, t a =25c, r iref =100k ? , v bat =3.7v, unless otherwise specified. figure 4. charge current vs. input voltage figure 5. v2p8 output voltage vs. input voltage figure 6. v2p8 output voltage vs. v2p8 load current 4.0 4.3 4.6 4.9 5.2 5.5 5.8 6.1 0.4 0.5 0.6 0.7 0.8 0.9 1.0 charge current (a) input voltage(v) 3.5 4.0 4.5 5.0 5.5 6.0 6.5 2.80 2.82 2.84 2.86 2.88 2.90 v2p8 output voltage(v) input voltage(v) 0246810 2.80 2.82 2.84 2.86 2.88 2.90 v2p8 output voltage(v) v2p8 load current (ma)
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 8 description of charger operation the AUR9801C initiates a charger operation when attached with a voltage source device or adaptor. figure 7 shows a typical charge profile when the chip operates as a conven tional linear charger with a constant voltage source. the charging current is set by an external resistor up to 1a. the target charging voltage is 1% acc urate over the specified range. the charger ic resets internal operational circuits when internal power-on-reset (por) signal becomes valid. v2p8 presents a voltage reference output source capable of driving 2ma current after por. other indication output pins are /status and /fault. the /status is active low as an open-drain type to indicate a charging cycle and valid till the end-off-charge (eoc). the /fault output signal becomes low to signal any occurred fault conditions such as a charging time fault. when charge with a current-limited adapter, AUR9801C should be programmed with i ref over the upper limit of i lim . a typical charge profile is displayed in figure 8 for minimizing power dissipation during cc mode. the worst power dissipation is often at the start of cv mode, although thermal fold-back conditions could still occur in this application case. figure 7. a typical charge profile as a conventional linear charger
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 9 description of charger operation (continued) figure 8. a typical charge profile with a current-limited adapter
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 10 operation overview for linear charging case, the AUR9801C performs either constant current (cc) and constant voltage (cv) profiles. the charging current is set by an external resistor up to 1a for package options. the target charging voltage is 1% accurate over the specified range. AUR9801C enters a trickle mode for preconditioning operation each time when a charging cycle starts till that the minimum charging voltage is reached and verified in 15 clock cycles. a thermal-feedback function offers thermal protection during linear charging operations. when the die temperature of aur 9801c goes up above 107 degree c, the charger automatically reduces the charging current. AUR9801C provides a timeout limit to prevent charging a dead battery for extensive time. recharging is automatical ly started when battery voltage drops to the recharging threshold point. AUR9801C enters the shutdown mode in case no voltage adapter is attached. /status /fault condition high high power-down, charging is suspended or interrupted low high charging high low bad battery (safety timer expired) charge current setting ? ? ? ? ? ? ? ? = iref 5 chg r 10 0.8 i where r iref in k ? charge timer setting nf c time time 1 14 = where time in minutes
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 11 flow chart
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 12 application circuit vbat vsen v2p8 en iref vin status fault time gnd vin +5v led1 1k 1k led2 10 f 15nf 10 f 1 f li battery 100k 1 2 3 4 56 7 8 9 10 AUR9801C figure 9. typical application circuit vbat iref vin gnd 1 4 5 8 10 AUR9801C adp 1a p_mos usb 680 4.7k p_mos n_mos 680 1a loading 4.7k bat 16v 1 f 200k 150k 15nf k k k k k 7 . 85 150 200 150 200 = + ? time i ref 940ma figure 10. external power path application circuit
data sheet li-ion/li polymer battery charger AUR9801C aug. 2012 rev. 1. 0 bcd semiconductor manufacturing limited 13 mechanical dimensions wdfn -33-10 unit: mm(inch)
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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