unisonic technologies co., ltd UB209B preliminary cmos ic www.unisonic.com.tw 1 of 9 copyright ? 2013 unisonic technologies co., ltd qw-r502-943.a battery protection ic with cell-balance function ? description the utc UB209B series is a protection ic for lithium-ion/lithium polymer rechargeable batteries, including a high precision voltage detection circuit and a delay circuit. the utc UB209B series has a transmission function and two types of cell-balance function so that users are also able to configure a protection circuit with series multi-cell. ? features * settable delay time by external capacitor for output pin * high-accuracy voltage detection circuit * two types of cell-balance function: charge/discharge * control charging, discharging, cell-balance by ctlc, ctld pins * low current consumption: 8.0a max * wide range of operation temperature (-40c~+85c) tssop-8 ? ordering information ordering number package packing lead free halogen free UB209Bl-p08-r UB209Bg-p08-r tssop-8 tape reel note: xx: output voltage, refer to marki ng information. UB209Bg-xx-p08-r (1)packing type (2)package type (3)output voltage code (1) r: tape reel (2) p08: tssop-8 (3) xx: refer to marking information (4) halogen free, l: lead free (4)halogen free ? serial code list model code overcharge detection voltage [v cu ](v) overcharge release voltage [v cl ](v) cell-balance detection voltage [v bu ](v) cell-balance release voltage [v bl ](v) overdischarge detection voltage [v dl ](v) overdischarge release voltage [v du ](v) discharge cell-balance function UB209B aa 4.100 4.000 4.050 4. 000 2.50 2.70 yes ab 3.800 3.750 3.650 3. 600 2.00 2.50 yes ac 3.900 3.500 3.550 3.550 2.50 2.70 yes ad 4.250 4.100 4.200 4.100 2.50 3.00 yes ae 4.000 3.900 3.950 3. 900 2.50 2.70 yes af 4.250 4.100 4.100 4.000 2.75 3.05 yes ag 3.900 3.600 3.550 3.500 2.00 2.40 yes ah 3.900 3.700 3.600 3.600 2.50 2.80 no
UB209B preliminary cmos ic unisonic technologies co., ltd 2 of 9 www.unisonic.com.tw qw-r502-943.a ? pin configuration 4 3 2 5 7 ctld v dd cdt v ss co 1 6 do 8 cb ctlc ? pin description pin no. pin name description 1 ctlc pin for charge control 2 ctld pin for discharge control 3 v dd connection pin for input positive power supply, for battery?s positive voltage 4 cdt connection pin to capacitor for overcharge detection delay, for over discharge detection delay 5 v ss input pin for negative power supply, conn ection pin for battery?s negative voltage 6 do output pin for discharge co ntrol (pch open drain output) 7 co output pin for charge control (pch open drain output) 8 cb output pin for cell-ba lance control (cmos output)
UB209B preliminary cmos ic unisonic technologies co., ltd 3 of 9 www.unisonic.com.tw qw-r502-943.a ? block diagram logic control and delay circuit 400 na 400 na co do cb ctld ctlc cdt v dd v ss 8.31 m ? overcharge detection comparator cell-balance detection comparator overdischarge detection comparator + - + - + -
UB209B preliminary cmos ic unisonic technologies co., ltd 4 of 9 www.unisonic.com.tw qw-r502-943.a ? absolute maximum rating (t a =25c unless otherwise specified) parameter symbol ratings unit input voltage between v dd and v ss v ds v ss -0.3~v ss +12 v cb pin output voltage v cb v ss -0.3~v dd +0.3 v cdt pin voltage v cdt v ss -0.3~v dd +0.3 v do pin output voltage v do v dd -24~v dd +0.3 v co pin output voltage v co v dd -24~v dd +0.3 v ctlc pin input voltage v ctlc v ss -0.3~v ss +24 v ctld pin input voltage v ctld v ss -0.3~v ss +24 v power dissipation (note 2) p d 700 mw operating ambient temperature t opr -40~+85 c storage temperature t stg -55~+125 c note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. when mounted on board: 114.3mm76.2mm1.6mm
UB209B preliminary cmos ic unisonic technologies co., ltd 5 of 9 www.unisonic.com.tw qw-r502-943.a ? electrical characteristics (t a =25c unless otherwise specified) parameter symbol test conditions min typ max unit test circuit overcharge detection voltage v cu v cu -0.05 v cu v cu +0.05 v 1 overcharge release voltage v cl v cl -0.05 v cl v cl +0.05 v 1 cell-balance detection voltage v bu v bu -0.05 v bu v bu +0.05 v 1 cell-balance release voltage v bl v bl -0.05 v bl v bl +0.05 v 1 over discharge detection voltage v dl v dl -0.10 v dl v dl +0.10 v 1 over discharge release voltage v du v du -0.10 v du v du +0.10 v 1 cdt pin resistance (note 1) r cdt v ds =3.5v, v cdt =0v 4.76 8.31 10.9 m ? 2 cdt pin detection voltage (note 1) v cdet v ds =3.5v v ds 0.65 v ds 0.70 v ds 0.75 v 3 operating voltage between vdd and vss v dsop output voltage of co, do, cb fixed 1.5 8.0 v ctlc pin h voltage v ctlch v ds =3.5v v ds 0.55 v ds 0.90 v 4 ctld pin h voltage v ctldh v ds =3.5v v ds 0.55 v ds 0.90 v 4 ctlc pin l voltage v ctlcl v ds =3.5v v ds 0.10 v ds 0.45 v 4 ctld pin l voltage v ctldl v ds =3.5v v ds 0.10 v ds 0.45 v 4 current consumption during operation (note 2) i ope v ds =3.5v 3.5 8.0 a 5 sink current ctlc (note 2) i ctlcl v ds =3.5v, v ctlc =3.5v 300 400 500 na 6 sink current ctld (note 2) i ctldl v ds =3.5v, v ctld =3.5v 300 400 500 na 6 source current cb i cbh v cb =4.0v, v ds =4.5v 30 a 7 sink current cb i cbl v cb =0.5v, v ds =3.5v 30 a 7 source current co i coh v co =3.0v, v ds =3.5v 30 a 7 leakage current co i col v co =24v, v ds =4.5v 0.2 a 8 source current do i doh v do =3.0v, v ds =3.5v 30 a 7 leakage current do i dol v do =24v, v ds =1.8v 0.2 a 8 notes: 1. in the utc UB209B series, users are able to set delay time for the output pins. by using the following formula, delay time is calculated with the value of cdt pin?s resistance in the ic (r cdt ) and the value of capacitor set externally at the cdt pin (c cdt ). t d [s]=-ln(1-v cdet /v ds )c cdt [f]r cdt [m ? ] =-ln (1-0.7(typ.) )c cdt [f]8.31m ? (typ.) =10.0m ? (typ.)c cdt [f] in case of the capacitance of cdt pin c cdt =0.01f, the output pin delay time t d is calculated by using the above formula and as follows. t d [s]=10.0m ? (typ.)0.01f=0.1s (typ.) test r cdt and the cdt pin detection voltage (v cdet ) by test circuits shown in this datasheet after applying the power supply while pulling-down the ctlc, ctld pins to the level of v dd pin outside the ic. 2. in case of using ctlc, ctld pins pulled-down to the level of v dd pin externally, the current flows into the vss pin (i ss ) is calculated by the following formula. i ss =i ope +i ctlcl +i ctldl
UB209B preliminary cmos ic unisonic technologies co., ltd 6 of 9 www.unisonic.com.tw qw-r502-943.a ? test circuit ctlc ctld v dd cdt cb co do v ss utc UB209B 100 k 100 k com v v v figure 1. test circuit 1 ctlc ctld v dd cdt cb co do v ss utc UB209B com a figure 2. test circuit 2 100 k 100 k
UB209B preliminary cmos ic unisonic technologies co., ltd 7 of 9 www.unisonic.com.tw qw-r502-943.a ? test circuit(cont.) ctlc ctld v dd cdt cb co do v ss cb co do v ss ctlc ctld v dd cdt utc ub209a utc ub209a a a a a a com com figure 7. test circuit 7 figure 8. test circuit 8 ? operation figure 9 shows the operat ion transition of utc UB209B .
UB209B preliminary cmos ic unisonic technologies co., ltd 8 of 9 www.unisonic.com.tw qw-r502-943.a 1. normal status in the utc UB209B , both of co and do pin get the v dd level; the voltage between v dd and v ss (v ds ) is more than the overdischarge detection voltage (v dl ), and is less than the over charge detection voltage (v cu ) and respectively, the ctlc pin input voltage (v ctlc ) > the ctlc pin voltage ?l? (v ctlcl ), the ctld pin input voltage (v ctld ) > the ctld pin voltage ?l? (v ctldl ). this is the normal status. 2. overcharge status in the utc UB209B , the co pin is in high impedance; when v ds gets v cu or more, or v ctlc gets v ctlcl or less. this is the overcharge status. if v ds gets the overcharge release voltage (v cl ) or less, and v ctlc gets the ctlc pin voltage ?h? (v ctlch ) or more, the utc UB209B releases the overcharge status to return to the normal status. 3. overdischarge status in the utc UB209B , the do pin is in high impedance; when v ds gets v dl or less, or v ctld gets v ctldl or less. this is the overdischarge status. if v ds gets the overdischarge release voltage (v du ) or more, and v ctld gets the ctld pin voltage ?h? (v ctldh ) or more, the utc UB209B releases the overdischarge status to return to the normal status. 4. cell-balance function in the utc UB209B , the cb pin gets the level of v dd pin; when v ds gets the cell-balance detection voltage (v bu ) or more. this is the charge cell-balance function. if v ds gets the cell-balance release voltage (v bl ) or less again, the utc UB209B sets the cb pin the level of v ss pin. in addition, the cb pin gets the level of v dd pin; when v ds is more than v dl , and v ctld is v ctldl or less. this is the discharge cell-balance function. if v ctld gets v ctldh or more, or v ds is v dl or less again, the utc UB209B sets the cb pin the level of v ss . 5. delay circuit in the utc UB209B , users are able to set delay time which is from detection of changes in v ds , v ctlc , v ctld to output to the co, do, cb pin. for example in the detection of overcharge status, when v ds exceeds v cu , or v ctlc gets v ctlch or less, charging to c cdt starts via r cdt . if the voltage between cdt and vss (v cdt ) reaches the cdt pin detection voltage (v cdet ), the co pin is in high impedance. the output pin delay time t d is calculated by the following formula. t d [s]=10.0m ? (typ.)c cdt [f] the electric charge in c cdt starts to be discharged when the delay time has finished. the delay time that users have set for the co pin, as seen above, is settable for each output pin do, cb.
UB209B preliminary cmos ic unisonic technologies co., ltd 9 of 9 www.unisonic.com.tw qw-r502-943.a ? typical application circuit eb- eb+ 1 m 510 k 1 m 510 k 1 k 1 k 1 k 1 k 1 k 1 k 1 m 1 m cfet dfet co3 do3 ctlc3 ctld3 v ss3 cdt3 cb3 v dd3 470 0.01 f 0.1 f bat3 470 0.1 f 0.1 f 470 bat2 bat1 co2 do2 ctlc2 ctld2 v ss2 cdt2 cb2 v dd2 co1 do1 ctlc1 ctld1 v ss1 cdt1 cb1 v dd1 utc UB209B (3) utc UB209B (2) utc UB209B (1) figure 10 caution: 1. the above constants may be changed without notice. 2. the example of connection shown above and the constant do not guarantee proper operation. perform thorough evaluation using the actual application to set the constant. utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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