SAITSRIAAL Protection of Lithium lon Batteries MM1414 Monolithic IC MM1414 This IC is use to protect lithium-ion batteries consisting of three or four cells. It adopts a compact package and has the functions of previous models, with functions for overcharge detection, overdischarge detection and overcurrent detection. A dead time can be set externally. 1. Overcharge detection voltage accuracy +25m\V/cell 2. Consumption current Vcell=4.4V} 50uA typ. 3. Gonsumption current (Vcell=3.5V) 23uA typ. 4. Consumption current (Vcell=1.8V} 2A typ. 5. Overcharge sensing dead time: can be set externally 6. PF detection: warning signal when cell voltage falls TSOP-20A IC for protection of lithium-ion batteries consisting of three or four cells OV SEL NC NC nooo ooooYG C3 CON 90 19 18 17 16 15 14 13 12 11 Nc Nc DCHG V1 12345678910 NC Ve OOO CoO Oooo CDC V3 TSOP-20A COL VA COV NC GND VccSAPS Protection of Lithium lon Batteries MM1414 OV @ DCHG @ OVA V3 9 V2 V1 9 gd , V4 cell yoltage monitoring circuit | - Overcharge Overdischarge Overcharge Start-up datection circuit detection circuit no-response - ] t = circuit Hysteresis | V3 cell voltage monitoring circuit Overcharge | | QOverdischarge . detection circuit} detection circuit | 1 ; | f =e V2 cell voltage monitoring circuit Overcharge Overdischarge detection circuit} detection circuit -r 1 ; | t o Internal voltage 1 cell yoltage monitoring circuit source circu Overcharge Overdischarge detection circuit} detection circuit Hysteresis Overdischarge Start-up Overcurrent Start-up no-response no-response circuit circuit Prohibit ed] Prohibit ed PGND CDC 3 CS 8 3 COL 1 CON SELSAITSRIAAL Protection of Lithium lon Batteries MM1414 Overcharge detection output pin NPNTft open collector output Output -o. Normal: high impedance Overcharge: Low Not connected Overcurrent detection pin Monitors load current equivalently by the voltage drop between discharge control Input FET source and drain, and makes DCHG pin high when the voltage goes below overcurrent detection voltage, turning off discharge control FET. After overcurrent detection, current flows from this pin and when there is a light load, overcurrent mode is released. This function does not operate in discharge mode. Not connected Discharge control FET (P-ch) drive pin Output | Normal: Low Overdischarge: High Not connected Overdischarge detection dead time setting pin input Dead time can be set by connecting a capacitor between CDC pin and ground. Input Overcurrent detection dead time setting pin Dead time can be set by connecting a capacitor between COL pin and ground. Overcharge detection dead time setting pin Input Dead time can be set by connecting a capacitor between COV pin and ground. Input | Ground pin 3 cell switch pin SELpin= GND: 3 cell (no V1 cell detection) SEL pin = Vec: 4 cell Input Not connected Discharge FET ON/OFF pin Input | CON pin low; DCHG pin low CON pin high; DCHG pin high Not connected Input | V1 cell high side voltage input pin Input | V2 cell high side voltage and V3 cell low side voltage input pin Input | V3 cell high side voltage and V4 cell low side voltage input pin Input | V4 cell high side voltage input pin Not connected 20.8) Vcc | Input | Power supply input pinSAPS Protection of Lithium lon Batteries MM1414 te overcurrent nho-response e@ Overcurrent $ comparator to to overcurrent to overcurrent no-respons overcurrent release no-response of Overcharge \/ ne-response comparator overcurrent DCHG release no-response to 1 cell overdischarge detection SEL Cito | () Overdischarge CDC \/ overdischarge\/ no-respons detection comparator Vec to overdischarge no-respons CON ent Oyercur ; ho-response comparator ~ ~ $ $ Overdischarge > 2 Overcharge comparator | ] comparator to . to overdischarge > > overcharge . ho-response 2 > no-response A, A, V2 ; 2 8 8 3 Overdischarge @ > Overcharge comparator comparator to =< iP overdischarge to V1 sno-response $Y Ss overcharge 7 3 no-response Qa i > wd Bo Py A,SAITSRIAAL Protection of Lithium lon Batteries MM1414 V3 @ . + fostare 3 9 S overcharge ? ~ Oyercharge eae to > overcharge > no-response Overdischarge 2 comparator lo di overdischarge V2 ho-response : @-w cq z comparator 9 comparator to overdischarg | to V3 no-respoyse $ $ overcharge $ oF > no-response whe hr Pye a Ratings: -40~+125 20~+70 C 0,3~24 Vv 0.5~24 Vv 0.5~24 Vv 0,324 Vv 300 mW Operating temperature Vorr +1,8~+24 VvSAPS Protection of Lithium lon Batteries MM1414 (Except where noted otherwise, Ta=25C, Voc=V44+V3+V2+V1, Vce=3.5V, CON=0V, SEL=0V} Vcrii=44V, CON=0V pA Vcr=3.5V, CON=0V 27 | 50 | pA Vcr=1.8V, CON=0V 2 4 pA Vcet1=3.5V, CON=Vcc 12) 20 | pA Vcaii=1.8V, CON=Vec 1 2 | pA Vern=4.4V 10 | 20 | pA Vcer=3.5V 8 15 | pA Veri1=1.8V 25 | 50 | pA Vcer=3.5V +300) nA Vce=3.5V +300] nA Vce=3.5V +300] nA A, C | 4.325 | 4.350 | 4.375 Vesit : 4.2V+4.4V Vv B, D | 4.225] 4.250 | 4.275 AVU Veet : 4.2V4,4V3.9V 140 | 200 | 260 | mV tov COV=0.1pF 05 | 10 | 16 s A,B | 1.90 | 2.00 | 2.10 VcELLS Veet : 3.5V41.8V Vv C,D | 2.20 | 2.30 | 2.40 VcritD Vceti: 1.8V-3.5V 2.85 | 3.00) 3.15) V A,B | 0.76 | 1.00 | 1.25 AVDS VeetLD-VcEILS Vv C,D | O46 | 0.70 | 0.95 tCDC CDC=0.1pF 05 | LO} 15 s VOC Vec-Ves, DCHG 135 | 150 | 165 | mV AVOC 20 | 40 | mV tCOL1 COL=6.001pF 5 10) 15 | mS tCOL2 COL=0.001pF, Vec-CS>1.0V 15 | 3.0 | mS tCOL3 COL=0.001pF 5 10) 15 | mS Load release conditions 500kQ Isobcu | Vee=1.8V,SW1:A VDCHG=Vcc-0.8V 20 pA IstDcu Vceii=3.5V, SW1:A VDCHG=0.8V 20 pA Vec-VDCHG, Iso=20pA, SW1 : B 08 | V VDCHG-GND, Isi=-20,A, SW1:B a8 | V VOV=0.4V, Ta=-20~+70C 100 pA VOV=24V O1 | pA DCHG= "High" 04} V DCHG= "Low" Ver-O.4 Vv Vcsr=3.5V, CON=0.4V 1 2 | pA for 3 cell 04] V for 4 cell VecO4 Vv Vcer=3.5V, SEL=0.4V 1 2 | pAProtection of Lithium lon Batteries MM1414 DCHG CDC COL COV GND V2 V1 CON SEL = For overcharge 1 ye Charge OFF I Overcharge detection voltage! Cell voltage COV pin 1-__- Sensing dead, OV pin (for pull up) =~. Overcharge release voltage Normal state Overcharge Normal stateSAITSRIAAL Protection of Lithium lon Batteries MM1414 = For overdischarge Discharge OFF Charge start ! = --- Discharge resume voltage Overdischarge _ detection voltage Cell voltag CON pin 1 I Sensing ' ' I 1 ' ' dead ! ! ' ' ' I $_-| ' ' I ' I ' ' l I I I I I I I CDC pin ' ' I I 1 1 DCHG pin nw 1 ee | | _ Normal state t Normal state Overdischarge | {Normal state External control Normal state Normal state Overcurrent Load release Gurrent flows / from CS pin CS pin 1 I I I I I I I 1 1 I I I I I I I 1 1 I I I I I COL pin : i 1 1 te a! ! 1 I I Sensing dead ; Reset dead} 1 DCHG pin 1 I Normal state Overcurrent Normal stateSAITSRIAAL Protection of Lithium lon Batteries MM1414 LL ft} OV Vcc 2-2 | 19] P-chFET Hal cS V4, [BH 2 El V3 fa} wt 5|DCHG = V2 fe} mf in V1 fw oi 00 | rh a] COL. = CON |B > Bl COY 12] oe GND SEL |] + Q Overcurrent Sensing Dead Time 1, Overcurrent Reset Dead Time 10 ==2S=578 100 E =igo=m3a Rit - --4t4-MthH Li - --7T1-M71H piu 1 --44-U4u I I ee | 1 I Pritt ~ a POT TTP TT OPT Pape TH Oe ~Prrrit OM 1 E Lee ee RHE - OeS o l 1 obi Hoboprterdi e Do 1 1 1rrrddl I 1 trrdielel = E 10 I I 1 tii 1 I 1 tttil _ Re---kF-+t-FLEPL Livy - - -F-F-FEEELIGA 7] r FIOIZICIIICIL FOC ICICICCCOOI oc oT Piot~-L-~L_LL LIIL~-~-L-~L_-LLLLIIL D 0.1 s Pio~-bLiLe LLIJE-~-~-L-LeLLLLIJ Qa . Lo--LoL LLLIGP ~~ -LLeILLLLIL Qo Se ee ee ee I 1 a | I 1 Prrdedl 1 1rrrddl I 1 trrdielel TT TIATNATA CO FPO TOP TT PPO OOP OPO eerrrrritt --44-H4H --F444+HH I I 1rd I I rbd | Tot Piru 1 1 1rrrddl I 1 trrdielel 0.01 i 1 L L Justi 1 L Lustil 0.001 0.01 0.4 4 100 1006 10000 Pin capacitance (uF) COL pin capacitance (pF) & Overcurrent Sensing Dead Time 2 100 a447AF WAIT 44444 rnd 4 ao Overcurrent Sensing Dead Time 2 (mS) - h -I-I-14 tI Hh Iii th I bk -IILIIL1 1 opnrni 0 100 10000 COL pin capacitance (pF) Note: The above characteristics are representative values only, and are not guaranteed.