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smart battery protection and monitoring ic M61040fp mitsubishi electric ( 1 /25) description the M61040fp is intended to be used as sb: smart battery. all functions needed for sb are packed to this M61040fp. the combination use with microcomputer such as m37515 will give various functions such as a detection or calculation of sb remaining capacity. over current detection circuit dedicated in M61040fp will give safety fet on/off control independent from microcomputer control. the amp gain of charge/discharge current detection circuit is controlled by microcomputer, therefore the accuracy of sb ? s remaining capacity detection becomes better than before. the reset circuit and the linear regulator for vcc / vref of microcomputer are dedicated in M61040fp. so this will help easy design of power circuit design of sb. feature l built-in high gain op-amps for monitoring charge/discharge current l built-in over current detection circuit for fet protection l all fets are controlled by microcomputer l various powers saving function to reduce total power dissipation l high input voltage device(absolute maximum rating:33v) application l smart battery system pin configuration (top view) gnd vin_12 dfout cfout vref reset vreg vin_11 cs cin ck di pfout analog_out vin_10 vin_4 vin_3 vin_2 vin_1 vcc 10 9 8 7 6 5 4 3 2 1 11 13 14 15 16 17 18 19 20 12 M61040fp 20p-tssop block diagram multi- plexer circuit reset vref vreg vin_10 vin_11 vin_1 gnd cin vin_12 pfout cfout dfout analog _out vcc series regulator charge/discharge current detection circuit battery cell voltage detection circuit vin_2 vin_3 vin_4 over current detection circuit delay circuit battery cell 1-4 voltage analog output serial to parallel conversion circuit cs di ck regulator on/off and reset circuit offset control gain selector
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 2 /25) 1. explanation of terminals table 1. pin symbol functions 5 v in 1 battery 1 + voltage input 6 v in 2 battery 1 ? voltage and battery 2 + voltage input 7 v in 3 battery 2 ? voltage and battery 3 + voltage input 8 v i n 4 battery 3 ? voltage and battery 4 + voltage input 9 v in 12 monitoring charger is connected or not 13 cin connect capacitor for over current detection delay 11 v in 10 charge / discharge current monitor input and connects charge / discharge current sense resistor 12 v in 11 charge / discharge current monitor input and connects charge / discharge current sense resistor 1 v cc power source pin. power from charger or battery 10 gnd ground 20 vreg linear-regulator output for microcomputer 19 vref vreg voltage output for vreg of microcomputer, max 200ua / 5v 18 reset reset signal output to reset of microcomputer 14 analog out various analog signal outputs to ad-input of microcomputer 4 dfout discharge fet-drive output. the driver is turned off when over current detected. 2 cfout charge fet-drive output. the driver is turned off by microcomputer. 17 di input of 6 bit length serial data from microcomputer 16 ck input of shift clock from microcomputer. di ? s input data is latched by low-to-high edge of this ck 15 cs during low signal input to this cs, data input to di is enabled. 3 pfout pre-charge fet-drive output. the driver is turned off by microcomputer.
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 3 /25) 2. operation description M61040 is developed for intelligent li-ion battery pack such as sb in sbs. M61040 is suitable for smart battery. *sbs: smart battery system introduced by intel and duracell *sb: smart battery which contains 3 or 4 series li-ion battery cells. all analog circuits are included to M61040. therefore pair using with microcomputer such as m37515 and small additional parts will give various functions such as battery remaining capacity detection. all functions are described as follows: 1)voltage detection circuit of each li-ion battery cells M61040 can output each battery cell ? s voltage of 3 or 4 series connection. built-in buffer amplifier is monitoring each battery voltage. microcomputer can adjust the offset voltage. 2)charge / discharge current detection circuit in sbs, remaining capacity check function (gas-gage function ) is necessary. to calculate accurate remaining capacity, microcomputer must get charge / discharge current periodically. accurate charge / discharge current of external sense register is monitored by built-in amp. the charger/ discharge current is converted to voltage value through the accurate sense resistor. output gain can be controlled by microcomputer. off-set voltage can be set lower by external parts, therefore dynamic range of microcomputer ? s a to d converter will widen. 3) over current detection circuit M61040 contains over current detection circuit. the discharging fet is turned off to stop discharging and it continues for the over current detection delay time (tiov1) or longer, if the discharging current becomes equal to or higher than a specified value. it is necessary for safety of li-ion battery pack. delay time is set by external capacity connected to cin. also the voltage of cin shows detection or not detection of over current. over current detection is controlled independently by this M61040 ? s built-in hardware not by microcomputer ? s software control. 4) series regulator, reference voltage M61040 contains low drop out series regulator. microcomputer in sb does not need any additional voltage regulator, max 20ma/5v. also M61040 gives very accurate reference voltage as 4.85v for vref voltage for microcomputer ? s a to d converter. 5) reset circuit for microcomputer vreg output voltage is checked by reset circuit of M61040. therefore, lower voltage of vreg issues reset signal to stop mull-function of microcomputer. also, lower voltage after long time ? s left issues reset signal to stop mull-function of microcomputer. this function is useful for safety of long time ? s left battery. when charger is connected to sb, this circuit will check vreg voltage, so if vreg voltage is not enough high, this circuit remains low as for reset signal to microcomputer.
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 4 /25) 6) power save function M61040fp contains power save function to control several supply current. the function and control method are shown as table 2. the function of battery voltage detection circuit, charge/discharge detection circuit, over current detection circuit can be stopped as the need arises. table 2 control method battery voltage detection circuit charge/discharge detection circuit over current detection circuit o o o software control (through serial i/f) each function can be on/off separately. enter power down mode microcomputer issues shot-down command to M61040 after microcomputer detects that battery voltage is too low. after this command, the dfout pin is set to `high` and the vin_12pin is pulled down by internal resistor to be set `low` and series regulator are turned off. in the power down mode, the M61040 operation is impossible. and cfout, dfout and pfout pins are set to `high`. (in this situation, both charging and discharging are forbidden. ) at this time, supply current becomes max. 1.0 m a , so drops of battery voltage is prevented.
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 5 /25) M61040fp v in 1 control signal from i/f circuit dfout pfout cfout v in 12 v cc reset vref cs di ck vreg series regulator regulator on/off control reset circuit gnd level in discharging serial to parallel conversion circuit figure1. function after detecting over-discharge resume from power down mode after entering power down mode, the series regulator will begin operation when charger is connected(vin_12 pin is high). the reset will output low to high signal when vreg is over reset level voltage. microcomputer will begin operation and send command to resume M61040 from power down mode. 7) conditioning circuit M61040 have a discharge circuit of each cells. it is available for drop of cell voltage for safety purpose. and to shorten the difference voltage among the cells . it can extend the battery pack life.
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 6 /25) 3. absolute maximum ratings table 3 item symbol condition ratings unit absolute maximum rating vabs 33 v supply voltage vcc 30 v power dissipation p d 750 mw operating temperature range t opr 1 - 20 ~ + 85 c storage temperature range t stg - 40 ~ + 125 c 4. electrical characteristics table 4 (ta=25 c v cc =14v ,unless otherwise noted) item symbol condition min. typ. max. unit circuit supply voltage vcc ? ? 30 v supply current 1 isup1 voltage monitor , v/r, reset on current monitor on 105 200 280 m a 7 supply current 2 isup2 voltage monitor , v/r, reset on current monitor off 65 120 165 m a 7 supply current (at power save mode) ips regulator on, non-loading, reset circuit on, others off 35 60 85 m a 7 total supply current (at power down mode) ipd all operation stop, v in 12=gnd ? ? 0.5 m a 7 output voltage vreg iout=20ma 5.145 5.2 5.295 v 3 input and output voltage difference vdif0 iout=20ma ? 0.3 0.8 v 3 linear regulation d vout10 v cc =6.2 ~ 24v iout=20ma ? 100 200 mv 3 load regulation d vout20 v cc =6.2v iout=50 m a ~ 20ma ? 30 45 mv 3 regulator input voltage v in 0 v cc voltage ? ? 30 v output voltage vref iout=200 m a 4.818 4.85 4.917 v 4 reference voltage load stability d vout21 v cc =6.2v iout=50 ~ 200 m a ? 5 45 mv 4 over current inhibit detection voltage 1 vcl vcl - 0.02 0.2 vcl + 0.02 v 8 over current inhibit detection voltage 2 vch load short detection v cc 3 0.6 v cc 3 v cc 3 1.4 v 8 over current inhibit detection delay time1 tvcl cict=0.01 m f 7 10 15 mse c 5 over current detection over current inhibit detection delay time 2 tvch 150 250 350 m sec 8
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 7 /25) table 4 (ta=25 c v cc =14v ,unless otherwise noted) item symbol condition min. typ. max. unit circuit input offset voltage voff1 31 208 385 mv 5 voltage gain 1 gamp1 0.99 1.0 1.01 5 output source current isource1 150 ? ? m a 10 output sink current isink1 150 ? ? m a 10 battery voltage detection detection voltage of battery cell vref - voff1 4.45 ? ? v 5,6 input offset voltage voff2 gain=200 selected 0.2 2 3.8 v 5 voltage gain21 gain21 38.4 40 41.6 v 5 voltage gain22 gain22 96 100 104 v 5 voltage gain23 gain23 192 200 208 v 5 output source current isource2 150 ? ? m a 9 charge/discharge current detection output sink current isink2 150 ? ? m a 9 di input h voltage vdih 3.5 ? vreg v 1 di input l voltage vdil 0 ? 0.5 v 1 cs input h voltage vcsh 3.5 ? vreg v 1 cs input l voltage vcsl 0 ? 0.5 v 1 ck input h voltage vckh 3.5 ? vreg v 1 interface ck input l voltage vckl 0 ? 0.5 v 1 detection voltage1 vdet - 3.045 3.25 3.475 v 2 reset release voltage1 vdet + 4.16 4.2 4.27 v 2 v in 1 resistor rinv1 4.4 12 27 k w 6 v in 2 resistor rinv2 4.4 12 27 k w 6 v in 3 resistor rinv3 4.4 12 27 k w 6 conditioning circuit v in 4 resistor rinv4 4.4 12 27 k w 6 thdi thcs tscs tsdi di cs ck reference period figure 3 interface timing
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 8 /25) 5. measurement circuit v in 1 v in 2 v in 3 v in 4 vcc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test0 test1 M61040fp a cin 5v 14v ick ick ics idi a a circuit 1 v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test0 test1 M61040fp v cin 1m w v circuit 2 v in 1 v in 2 v in 3 v i n 4 v cc gnd vreg vref reset di vin 12 ck v in 10 pfout dfout vi n 11 cfout cs analog out test0 test1 M61040fp cin 4.7uf v v circuit 3 figure 4 -1
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 9 /25) v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test0 test1 M61040fp cin v 5v 4.7uf circuit 4 v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test0 test1 M61040fp cin v2 v v1 v3 v4 4.7uf data input 0.5v ? 3.5v v v circuit 5 v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test1 test2 M61040fp cin a data input 0.5v ? 3.5v a a a 4.7uf v1 v2 v3 v4 i1 i2 i3 i4 circuit 6 figure 4 -2
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 10 /25) v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test1 test2 M61040fp cin a data input 0v ? 5v ipd, ips, isup2, isup1 measuring ipd: on except above : off measuring ipd: on except above : off circuit 7 v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test0 test1 M61040fp cin v 4.7uf v 14v circuit 8 v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test1 test2 M61040fp cin a data input 0.5v ? 3.5v 4.7uf isink isource 14v circuit 9 figure 4 -3
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 11 /25) v in 1 v in 2 v in 3 v in 4 v cc gnd vreg vref reset di v in 12 ck v in 10 pfout dfout v in 11 cfout cs analog out test1 test2 M61040fp cin a data input 0.5v ? 3.5v 4.7uf v1 v2 v3 v4 isink isource circuit 10 figure 4 -4
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 12 /25) 6. block diagram description (1) battery voltage detection circuit the M61040 battery voltage detection circuit is shown in figure 5. this circuit is composed of switch, buffer amplifier, reference voltage section and logic circuit. microcomputer selects detecting voltage before logic circuit controls the connection of switches. this connection decides which cell voltage(vbat1,vbat2,vbat3,vbat4) should be output from analog out pin. besides offset voltage can be output. in power down mode, supply current in this block is close to zero because all switches are off. note: regard 50 m s as the standard of settling time by voltage change in this block. v in 10 v in 4 v in 3 v in 1 v in 2 vat4 vat3 vat2 vat1 s01 s02 s42 s41 s32 s31 switch control from serial to parallel conversion circuit logic circuit s22 s21 s11 gnd vref to multiplexer circuit figure 5. battery voltage detection circuit
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 13 /25) (2) charge / discharge current detection circuit the charge/discharge current detection circuit is shown in figure 6. this circuit is composed of offset voltage adjustment circuit, buffer amplifier and resistor network. the pre-amplifier amplifies the voltage of sense resistance to the voltage based on gnd. the voltage gain can be selected by microcomputer commands. buffer amplifier does an impedance translation between input and output. rsence amp4 amp3 v in 10 v in 11 charge current monitor from serial to parallel conversion circuit discharge current monitor from serial to parallel conversion circuit r r rc3 rc2 rc1 gnd rd3 rd2 rd1 to multiplexer circuit offset voltage adjustment circuit vreg = 5.2v r r amp1 amp2 + - + + + - - - figure 6. charge / discharge current detection circuit the offset voltage can be compensated by adjustment circuit. the function in detecting discharge current is shown in figure 7. the differential voltage of sense resistor is input to +(plus) terminal of amp 1 when discharge current is flowing in sense resistor. selecting high voltage gain by microcomputer ? s command is capable of monitoring very little discharge current accurately. the differential voltage of sense resistor is input to -(minus) terminal of amp 2 when charge current is flowing in sense resistor. the methods of detecting in charging are the same as in discharging except that amp2 reverses input voltage before outputting. note: regard 500 m s as the standard of settling time by voltage change in this block. from i/f circuit charge current icha discharge current idis va = idis rsens gain rsence v in 10 v in 11 rc3 rc2 rc1 rd3 rd2 amp2 amp1 rd1 vb = idis rsens gain + + - - figure 7. charge/discharge current detection
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 14 /25) (3) over current detection circuit the over current detection circuit is shown in figure 8. this circuit is composed of comparator, reference voltage and delay circuit. it can be got high accuracy over current detection by adjusting detection voltage with sense resistor. microcomputer can detect the over current status through monitoring ? cin_1 ? pin. besides this block contains load-short detection circuit. this circuit detects load-short with vin_12 pin and protects faster than over current detection. to microcomputer v in 12 df out cin rsense v in 10 v in 11 v ref1 + - delay circuit battery figure 8. over current detection circuit (4) voltage regulator and reference voltage voltage regulator and reference circuit are shown in figure 9. pch mos transistor is used for output driver. the output voltage can be adjusted by M61040 itself. so the external resistor is not required. note: there is a diode put between vcc and vreg terminal to prevent the invert current from damaging this ic when vcc voltage is higher than vreg voltage. so please always keep vreg voltage lower than vcc+0.3v. set a condenser on output to suppress input changes or load changes. on/off on/off vref1 + - vref vreg m1 r 1 r 2 v cc serial to parallel conversion circuit vref2 + - m1 r 3 r 4 figure 9 voltage regulator circuit
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 15 /25) (5) reset circuit the M61040 reset circuit is shown in figure 10. this circuit is composed of comparator, reference voltage section and breeder resistor. the reset output is nch open drain structure so the reset delay time depends on external cr value. the reset circuit monitors vreg output to prevent microcomputer abnormal operation when vcc voltage goes down abnormally. (6) conditioning circuit the M61040 conditioning circuit is shown in figure 11. this circuit is composed of switch, resistor and logic circuit. according to the serial data from microcomputer, the logic circuit can individually control the switches (s60, s61 ? etc.) to do individual cell discharge to a select voltage. this circuit is capable of making all sells discharge at the same time. r1 r2 vref1 gnd vreg rh reset + - figure 10. reset circuit gnd v in 4 v in 3 s63 s62 s61 r63 r62 r61 r60 s60 v in 1 v in 2 v1 v2 switch control serial to parallel conversion circuit v3 v4 logic circuit figure. 11. conditioning circuit
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 16 /25) 7. digital data format d5 decoder 6 bit shift resistor address cs ck di first last lsb msb d4 d3 d0 d2 d1 multiplexer control latch mpx fet,vr control latch mpx *1 latch mpx latch mpx offset adjustment latch mpx vreg,vref control latch mpx *2 *1 : charge, discharge current detection *2 : battery voltage output figure 12 serial to parallel conversion circuit 8. data timing example msb lsb d0 ck di d1 d2 d3 d4 d5 cs figure 13. serial to parallel timing chart
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 17 /25) 9. data timing table 5. address data establishment data d5 d4 d3 d2 d1 d0 contents reset 0 0 0 ? ? ? battery voltage output 0 0 1 ? ? ? refer to table 6. offset adjustment 0 1 0 ? ? ? refer to table 7. charge/discharge current detection 0 1 1 ? ? ? refer to table 8. fet control 1 0 0 ? ? ? refer to table 9. multiplexer select 1 0 1 ? ? ? refer to table 10. conditioning circuit 1 1 0 ? ? ? refer to table 11. regulator over current control 1 1 1 ? ? ? refer to table 12. table 6 battery voltage output d2 d1 d0 output voltage detail 0 0 0 v1 0 0 1 v2 0 1 0 v3 0 1 1 v4 1 0 0 connect to vin_2 offset voltage output 1 0 1 connect to vin_3 offset voltage output 1 1 0 connect to vin_4 offset voltage output 1 1 1 connect to vin_10 offset voltage output v1 battery voltage output when system reset table 7 offset voltage control section of discharge current monitor amplifier output d2 d1 d0 offset voltage value 0 0 0 no offset (0v) 0 0 1 1v 0 1 0 2.1v 0 1 1 3.1v 1 0 0 3.7v 1 0 1 1v 1 1 0 1v 1 1 1 1v no offset voltage when system reset
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 18 /25) table 8 charge and discharge current detection d2 d1 d0 mode output 0 0 0 amp stop, resistor open amp operation stop, current save 0 0 1 gain x40 output 0 1 0 gain x100 output 0 1 1 gain x200 output 1 0 0 amp stop, resistor open amp operation stop, current save 1 0 1 offset output (x40) 1 1 0 offset output (x100) 1 1 1 offset output (x200) s amplifier operation is stopped when system reset table 9 fet regulator control fet connection terminal d2 d1 d0 cfout terminal dfout terminal pfout terminal 0 0 0 high high high 0 0 1 high high low 0 1 0 high low high 0 1 1 high low low 1 0 0 low high high 1 0 1 low high low 1 1 0 low low high 1 1 1 low low low s cfout, dfout and pfout are high when system reset (over current detection is disable when dfout is high) table. 10 multiplexer control d2 d1 d0 output 0 0 0 open output (floating) select 0 0 1 open output (floating) select 0 1 0 open output (floating) select 0 1 1 open output (floating) select 1 0 0 charge current output select 1 0 1 discharge current output select 1 1 0 battery voltage output select 1 1 1 gnd output select s multiplexer output is floating when system reset
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 19 /25) table. 11 conditioning circuit d2 d1 d0 output 0 0 0 open 0 0 1 v1 conditioning (short vin_1 and vin_2) 0 1 0 v2 conditioning (short vin_2 and vin_3) 0 1 1 v3 conditioning (short vin_3 and vin_4) 1 0 0 v4 conditioning (short vin_4 and gnd) 1 0 1 v1 ~ v4 conditioning (discharge all cells) 1 1 0 open 1 1 1 open s conditioning circuit is floating when system reset table. 12 regulator, over current detection control output d2 d1 d0 regulator over current detection circuit 0 0 0 on on 0 0 1 off(gnd output) * 1 * 1 0 1 0 on capacity delay terminal l fix 0 1 1 on capacity delay terminal h fix 1 0 0 don t care don t care 1 0 1 don t care don t care 1 1 0 don t care don t care 1 1 1 don t care don t care s the regulator output is enable when system reset * 1 all functions of M61040 are stooped. but if the charger is connected then M61040 will not enter power down mode.
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 20 /25) 10. timing chart 10-1. discharge sequence 0 5 vreg reset - 0.15 - 0.1 - 0.05 0 0.05 0.1 0.15 v in 11(v) 0 1 2 3 4 5 battery voltage(v) 0 5 10 15 20 cfout(v) 0 5 10 15 20 pfout(v) 0 5 10 15 20 dfout(v) 0 5 10 15 20 supply voltage(v) 0 5 analog out(v) from low voltage (vbat1,vbat2,vbat3,vbat4) charging discharging charge stop charge period charge start pre-charge start pre-charge stop charge start v dd pin v in _12pin v in _1pin pre-charge current monitor gain 200 gain 40 charge current monitor bat1 monitor bat2 monitor bat3 monitor bat4 monitor off in initializing command from microcomputer command from microcomputer command from microcomputer command from microcomputer off in initializing off in initializing microcomputer starts operations. reset charger connected vreg vbat4 reaches the over-charge voltage. command from microcomputer * testing in constant voltage fig. 14
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 21 /25) 10-2. discharge sequence - 0.15 - 0.1 - 0.05 0 0.05 0.1 0.15 v in 11(v) 0 1 2 3 4 5 battery voltage(v) 0 5 10 15 20 cfout(v) 0 5 10 15 20 pfout(v) 0 5 10 15 20 dfout(v) 0 5 10 15 20 supply voltage(v) 0 5 vreg reset 0 5 analog out(v) from high voiltage (vbat1,vbat2,vbat3,vbat4) discharge charge discharge period discharge start discharge stop v dd pin v in 12pin: v in _1pin vreg reset discharge current monitor gain 200 gain 40 bat1 monitor bat2 monitor bat3 monitor bat4 monitor self discharge period discharge stop system stop command from microcomputer command from microcomputer vbat4 reaches the over-discharge voltage. command from microcomputer command from microcomputer command from microcomputer off in power-down mode command from microcomputer pulled down to gnd in discharge forbidden fig. 15
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 22 /25) 10-3. over current detection sequence - 0.4 - 0.3 - 0.2 - 0.1 0 0.1 0.2 0.3 0.4 v in 11(v) 0 1 2 3 4 5 battery voltage(v) 0 5 10 15 20 cfout(v) 0 5 10 15 20 pfout(v) 0 5 10 15 20 dfout(v) 0 5 10 15 20 supply voltage(v) 0 5 vreg reset 0 5 analog out(v) vbat1=vbat2=vbat3=vbat4 rash current generation discharge charge rash current generation discharge stop discharge stop discharge stop v dd pin v in _12 pin v in _1pin v cc reset discharge current monitor gain 40 over-current generation load short over-current generation load short discharge stop discharge stop discharge stop fig. 16
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 23 /25) 11. application circuit m37515 2nd protect M61040fp v in 3 v in 3 gnd v in 2 rin3 rin2 rin4 cin4 cin3 cin2 cin1 rin1 v in 2 vcc + terminal pfout cfout dfout vref vreg v dd vref v in 12 rsence v in 11 v in 10 cout v in 1 d1 rpf1 rcf1 rin12 rpf3 cfet pfet dfet rpf2 d2 rreset creset creg cvcc v cc v in 1 v in 4 v in 4 analog out ad in2 ad in1 cin11 rin11 cict cin reset reset ck rcs rck rdi di cs agnd dgnd - terminal gnd battery 4 battery 3 battery 2 battery 1 ct ck di cs rcf2 cref fig.17
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 24 /25) table.13 fixed number symbol components purpose recommend min. max. n.b. d1 diode supply voltage ? ? ? please take care the maximum power dissipation. d2 diode supply voltage ? ? ? please take care the maximum power dissipation. dfet pch mosfet discharge control ? ? ? ? cfet pch mosfet charge control ? ? ? ? pfet nch mosfet precharge control ? ? ? ? rcf1 resistor pull down resistor 1m w 100k w 3m w ? rcf2 resistor current limit 100k w ? 1m w ? rpf1 resistor pull down resistor 1m w 100k w 3m w ? rpf2 resistor precharge current control 1k w ? ? ? rpf3 resistor current limit 100k w ? 1m w ? rin1 resistor measure for esd 10 w ? 1k w cin1 capacitor measure for ripples of power supply 0.22 m f ? 1.0 m f ? rin2 resistor measure for esd 1k w ? 10k w cin2 capacitor measure for ripples of power supply 0.22 m f ? 1.0 m f ? rin3 resistor measure for esd 1k w ? 10k w cin3 capacitor measure for ripples of power supply 0.22 m f ? 1.0 m f * 2)please set up same value as rin2,cin2 rin4 resistor measure for esd 1k w ? 10k w cin4 capacitor measure for ripples of power supply 0.22 m f ? 1.0 m f * 2)please set up same value as rin2,cin2 cict capacitor set up delay time 0.01 m f ? 0.47 m f ? rin12 resistor measure for esd 10k w 300 w 200k w ? cvcc capacitor measure for ripples of power supply 0.22 m f ? ? ? rsence sensing resistor charge/discharge current monitor 20m w ? ? ? rin11 resistor measure for ripples of power supply 100 w ? 1k w cin11 capacitor measure for ripples of power supply 0.1 m f ? 1.0 m f ? creg capacitor eliminate the voltage noise 4.7 m f 0.47 m f ? ? cref capacitor eliminate the voltage noise 4.7 m f ? ? ? rreset resistor set up delay time 47k w 10k w 3m w crset capacitor set up delay time 0.1 m f ? ? * 3)it is necessary that you adjust a delay time for mcu. rck resistor pull down resistor ? 100k w ? ? rcs resistor pull down resistor ? 100k w ? ? rdi resistor pull down resistor ? 100k w ? ?
smart battery protection and monitoring ic M61040fp mitsubishi electric ( 25 /25) 12. package dimensions 6.6 0.2 4.4 0.2 6.4 0.3 0.17 0.05 0.5 0.2 0.65 0.2 0.1 unit :mm 20 1 10 11 0 ~ 0.1 1.00 0.05 1.1max. figure.18

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