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rev.1.0, sep.19.2003, page 1 of 28 m61041fp 4-battery version, no reset pin rej03f0063-0100z rev.1.0 sep.19.2003 this product is currently under development, and its specifications, pin assignments, etc., are subject to change. description the m61041fp is an semiconductor ic device developed for smart battery packs. it incorporates all the analog circuitry required by smart batteries in a single chip. when used in conjunction with a microprocessor, it allows the implementation of a variety of functions, such as battery capacity detection, through the addition of minimal peripheral devices and is ideal for smart battery system (sbs) battery packs. the m61041fp also has an on-chip overcurrent detect circuit so that the fet for controlling battery charging and discharging is protected regardless of the processing speed of the microprocessor. the microprocessor can change the amplifier gain of the charge/discharge current detect circuit, so battery capacity detection accuracy is increased. in addition, the m61041fp incorporates a linear regulator that allows it to function as the power supply for the microprocessor, thereby simplifying power supply block design. features ? on-chip high-gain op-amp for monitoring charge and discharge current. ? on-chip overcurrent detect circuit to protect fet. ? charge/discharge fet can be controlled from microprocessor. ? power-save function for reducing current consumption. ? 5.2 v operation to reduce microprocessor current consumption. ? high-voltage device (absolute maximum rating: 33 v). application ? smart battery system (sbs) battery packs this product is currently under development, and its specifications, pin assignments, etc., are subject to change. vin_11 gnd vin_1 vin_12 vreg analog_out di cs cfout dfout ck cin vin_4 vin_3 vin_2 vcc 8 7 6 5 4 3 2 1 m61041fp 9 10 11 12 13 14 15 16 16p-tssop figure 1 pin connection diagram (top view)
m61041fp rev.1.0, sep.19.2003, page 2 of 28 output selector vreg gnd vin_11 vin_1 cin vin_12 cfout dfout analog _out vcc series regulator charge/discharge current detect circuit battery voltage detect circuit vin_2 vin_3 vin_4 overcurrent detect circuit delay circuit battery 1-4 analog output serial/parallel converter circuit cs di ck regulator on/off control power-down circuit shift voltage adjustor gain switcher circuit fet control circuit figure 2 block diagram pin function description table 1 pin no. symbol function 1 vcc the chip ? s power supply pin. power is supplied by the charger or the battery. 2 vin_1 positive input pin for lithium ion battery 1. 3 vin_2 negative input pin for lithium ion battery 1. positive input pin for lithium ion battery 2. 4 vin_3 negative input pin for lithium ion battery 2. positive input pin for lithium ion battery 3. 5 vin_4 negative input pin for lithium ion battery 3. positive input pin for lithium ion battery 4. 6 vin_12 charger connect monitor pin. detects changes from power-down status. 7 dfout output pin for discharge fet on/off signals. also turns off when overcurrent detected. 8 cfout output pin for charge fet on/off signals. 9 gnd ground pin. negative input pin for lithium ion battery 4. connected to charge/discharge current sensor resistor. 10 vin_11 charge/discharge current monitor pin. connected to charge/discharge current sensor resistor. 11 analog_out output pin for analog signals. 12 cin capacity connection pin for setting overcurrent prevention delay time. 13 cs when this pin is low level, data input is accepted and data can be stored in a 6-bit shift register. at the rising edge from low to high the value in the 6-bit shift register is latched. 14 ck shift clock input pin. at the rising edge to high the input signal from the di pin is input to the 6-bit shift register. 15 di shift data input pin. serial data with a data length of 6 bits may be input via this pin. 16 vreg power supply pin for microprocessor. power can be shut off using a signal from the microprocessor.
m61041fp rev.1.0, sep.19.2003, page 3 of 28 operation the m61041fp is an semiconductor ic device developed for smart battery packs. it is ideal for smart battery system (sbs) battery packs that consist of four lithium ion batteries connected in series. a high-voltage device, it is suitable for use with a wide variety of charger systems. it incorporates all the analog circuitry required by smart batteries in a single chip. when used in conjunction with a microprocessor, it allows the implementation of a variety of functions, such as battery capacity detection, through the addition of minimal peripheral devices. the functions of the m61041fp are described below. 1. battery voltage detect circuit the m61041fp can output the voltage levels of the batteries connected in series via the analog_out pin. an on- chip buffer amplifier monitors the pin voltages of the batteries. offset voltage correction using adjustment by the microprocessor is also supported. the m61041fp is configured to detect the battery voltage using a microprocessor driven using a power supply voltage of 5.2 v. 2. charge/discharge current detect circuit sbs requires a function for monitoring the battery capacity. the m61041fp uses an on-chip amplifier to monitor battery capacity based on a drop in the voltage of an external sensor resistor. in this way, the charge/discharge current is converted into a voltage. the voltage amplification ratio can be adjusted from the microprocessor. in addition, the current output shift voltage can be adjusted from the microprocessor, widening the allowable dynamic range of the a/d converter. 3. overcurrent detect circuit the m61041fp has an on-chip overcurrent detect circuit. if an excessive current flows from the lithium ion batteries, the discharge control fet is shut off after a set delay time, halting discharge. this makes the battery pack safer. the delay time can be set using an external capacitor. it is possible to determine the overcurrent detect status by monitoring the cin pin. the overcurrent detect circuit provides protection regardless of the processing speed of the microprocessor. 4. series regulator the m61041fp has an on-chip low-dropout series regulator. it can be used as the power supply for the microprocessor, thereby simplifying power supply block design. on/off vref1 + - vreg m1 r 1 r 2 vcc from serial/parallel converter circuit figure 3 series regulator
m61041fp rev.1.0, sep.19.2003, page 4 of 28 5. power-save function the m61041fp is equipped with a power-save function. when the battery voltage is being monitored a portion of the charge/discharge current monitor circuit automatically stops operating, and when the charge/discharge current is being monitored the battery voltage monitor circuit automatically stops operating. this helps prevent unnecessary power consumption. in addition, current consumption is further reduced by setting the analog output selector to ground potential output when in the standby mode. transition to power-down mode when the microprocessor determines that the battery voltage has dropped it sends a power-down instruction via the interface circuit. when it receives the instruction, the m61041fp ? s dfout pin switches to high voltage. in addition, the vin_12 pin is pulled down to low level by an internal resistor. when the vin_12 pin goes to low potential after reception of the power-down instruction, output from the series regulator stops, switching the m61041fp into power-down mode. at this point the operation of the circuitry is completely halted. in this status cfout is high level and dfout is high level (external charge/discharge prohibited status). the maximum current consumption of the m61041fp is 1.0 a in order to prevent any further drop in the battery voltage. cancellation of power-down mode if the battery pack is connected to a charger when the m61041fp is in the power-down mode (vin_12 becomes high level), the series regulator immediately begins to operate. the power-down mode is canceled, and once again the m61041fp is ready to receive instructions from the microprocessor. m61041fp vin_1 control signals from interface circuit dfout cfout vin_12 vcc cs di ck vreg series regulator regulator on/off control internal reset circuit ground level after excess discharge serial/parallel converter circuit figure 4 operation after excess discharge detection
m61041fp rev.1.0, sep.19.2003, page 5 of 28 absolute maximum ratings table 2 item symbol rated value unit conditions absolute maximum rating vabs 33 v power supply voltage vcc 30 v allowable loss pd 500 mw ambient operating temperature topr1 -20 to +85 c storage temperature tstg -40 to +125 c thdi thcs tscs tsdi di cs ck standard figure 5 interface block timing definitions
m61041fp rev.1.0, sep.19.2003, page 6 of 28 electrical characteristics table 3 (ta = 25 c, vcc = 14 v unless otherwise specified) rated value block item symbol min. typ. max. unit circuit command conditions all power supply voltage vsup ? ? 30 v 1 ? circuit current 1 isup1 60 150 215 a 1 1 during charge/discharge current monitoring circuit current 2 isup2 55 140 200 a 1 2 during battery voltage monitoring circuit current 3 isup3 25 80 115 a 1 3 during ground output (initial status) circuit current (power-down mode) ipd ? ? 0.5 a 1 4 all circuits halted, vin_12 = gnd regulator output voltage vreg 5.075 5.2 5.325 v 2 ? vcc = 14v, iout = 20ma input stability ? vout10 ? 60 100 mv 2 ? vcc = 6.2v to 24v, iout = 20ma load stability ? vout20 ? 30 50 mv 2 ? vcc = 6.2v, iout = 0.1ma to 20ma input voltage (vcc pin) vin0 6.2 ? 30 v 2 ? overcurrent detect overcurrent prevention voltage 1 vd1 0.18 0.2 0.22 v 3 5 overcurrent prevention voltage 2 vd2 vcc/3 0.6 vcc/3 vcc/3 1.4 v 4 5 load short detected overcurrent prevention delay time 1 tvd1 7 10 15 ms 3 5 cict = 0.01 f overcurrent prevention delay time 2 tvd2 150 250 350 s 4 5 input offset voltage 1 voff1 31 206 385 mv 5 6 battery voltage detect voltage amplification ratio 1 gamp1 0.99 1.0 1.01 ? 5 7 output source current capacity isource1 150 ? ? a 6 8 output sink current capacity isink1 150 ? ? a 6 9 maximum detect battery voltage vmo_max 4.64 ? ? v 5 ? (vreg ? voff1)/gamp 1
m61041fp rev.1.0, sep.19.2003, page 7 of 28 rated value block item symbol min. typ. max. unit circuit command conditions input offset voltage voff2 1.0 2.4 3.8 v 7 10* gain = 200 charge/ discharge current detect voltage amplification ratio 21 gain21 38.4 40 41.6 7 11* voltage amplification ratio 22 gain22 96 100 104 7 12* voltage amplification ratio 23 gain23 192 200 208 7 13* current output shift voltage 1 vios1 0.96 1.04 1.12 v 7 14* current output shift voltage 2 vios2 1.93 2.08 2.23 v 7 15* current output shift voltage 3 vios3 2.91 3.12 3.33 v 7 16* current output shift voltage 4 vios4 3.49 3.74 3.99 v 7 17* output source current capacity isource2 150 ? ? a 8 18* output sink current capacity isink2 150 ? ? a 8 18* interface di input h voltage vdih vreg ? 0.5 ? vreg v 9 ? di input l voltage vdil 0 ? 0.5 v 9 ? cs input h voltage vcsh vreg ? 0.5 ? vreg v 9 ? cs input l voltage vcsl 0 ? 0.5 v 9 ? ck input h voltage vckh vreg ? 0.5 ? vreg v 9 ? ck input l voltage vckl 0 ? 0.5 v 9 ? di setup time tsdi 600 ? ? ns 9 ? di hold time thdi 600 ? ? ns 9 ? cs setup time tscs 600 ? ? ns 9 ? cs hold time thcs 600 ? ? ns 9 ? refer to figures 1 to 9 for the circuits and to table 4 for the command sequences used for measurement. * for the charge/discharge current detect block, different command sequences are used during charging and discharging.
m61041fp rev.1.0, sep.19.2003, page 8 of 28 measurement circuit diagrams vin_1 vin_2 vin_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog _out a vdi vck vcs creg 4.7 f s1 s2 vcc cin 0.01 f data input vreg ? vss during ipd measurement: s1 = off, s2 = on all other times: s1 = on, s2 = off circuit 1 vin_1 vin_2 vin_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfou t m61041fp di ck cs cin analog vdi v c k vcs creg vcc v s1 s 2 s3 vs_reg vm_reg _out cin 0.01 f data input vreg ? vss circuit 2
m61041fp rev.1.0, sep.19.2003, page 9 of 28 vin_1 vin_2 vi n_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041f p di ck cs cin analog vdi v c k vcs creg vcc vin_11 v _out 4.7 f cin 0.01 f data input vreg ? vss circuit 3 vin_1 vin_2 vin_ 3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog vdi v c k vcs creg vcc vin_12 v _out 4.7 f cin 0.01 f data input vreg ? vss circuit 4
m61041fp rev.1.0, sep.19.2003, page 10 of 28 vin_1 vin_2 vin_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog vdi v c k vcs creg vbat4 vbat3 vbat2 vbat1 v _out 4.7 f cin 0.01 f data input vreg ? vss circuit 5 vin_1 vin_2 vin_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog vdi v c k vcs creg vbat4 vbat3 vbat2 vbat1 a _out 4.7 f cin 0.01 f data input vreg ? vss circuit 6
m61041fp rev.1.0, sep.19.2003, page 11 of 28 vin_1 vin_2 vi n_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog vdi v c k vcs creg vcc v vin _ 11 _out 4.7 f cin 0.01 f data input vreg ? vss circuit 7 vin_1 vin_2 vin_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog vdi v c k vcs creg vcc a vin _ 11 _out 4.7 f cin 0.01 f data input vreg ? vss circuit 8
m61041fp rev.1.0, sep.19.2003, page 12 of 28 vin_1 vin_2 vin_3 vin_4 vcc gnd vreg vin_12 vin_11 dfout cfout m61041fp di ck cs cin analog vdi v c k vcs creg vbat4 vbat3 vbat2 vbat1 v vin _ 11 vin_12 v v _out 4.7 f cin 0.01 f data input vreg ? vss circuit 9 table 4 command sequences used for measuring rated values no command sequence vin_11 input 1 (00) 8 (24) 8 (31) 8 (43) 8 (52) 8 90mv 2 (00) 8 (13) 8 (43) 8 (51) 8 0mv 3 (00) 8 0mv 4 (00) 8 (71) 8 0mv 5 (00) 8 (43) 8 0mv 6 (00) 8 (51) 8 (14) 8 (15) 8 (16) 8 (17) 8 0mv 7 (00) 8 (51) 8 (10) 8 (11) 8 (12) 8 (13) 8 0mv 8 (00) 8 (51) 8 (13) 8 0mv 9 (00) 8 (51) 8 (17) 8 0mv 10 (00) 8 (43) 8 (52) 8 (37) 8 0mv 11 (00) 8 (43) 8 (52) 8 (31) 8 (35) 8 90mv 12 (00) 8 (43) 8 (52) 8 (32) 8 (36) 8 25mv 13 (00) 8 (43) 8 (52) 8 (33) 8 (37) 8 3mv 14 (00) 8 (43) 8 (52) 8 (31) 8 (24) 8 90mv 15 (00) 8 (43) 8 (52) 8 (31) 8 (25) 8 90mv 16 (00) 8 (43) 8 (52) 8 (31) 8 (26) 8 90mv 17 (00) 8 (43) 8 (52) 8 (31) 8 (27) 8 90mv 18 (00) 8 (43) 8 (52) 8 (31) 8 45mv notes : 1. indications such as (00) 8 show the address and data, in that order, of the serial data from the microprocessor in octal notation. 2. numbers 10 to 17 are command sequences used during charging. for the commands used during discharging, substitute (53) 8 for (52) 8 . 3. during measurement, the voltage listed in table 4 should be input to vin_11. when measuring during charging, the specified voltage should be input to vin_11 as a negative voltage. the specified voltage should be input to vin_11 as a positive voltage during discharging.
m61041fp rev.1.0, sep.19.2003, page 13 of 28 description of circuit blocks (1) battery voltage detect circuit as shown in figure 6, the battery voltage detect circuit block of the m61041fp consists of switches, a buffer amplifier, a reference voltage circuit, and a logic circuit. when the voltage to be detected is selected, based on serial data from the microprocessor, the appropriate switch connections are determined by the logic circuit. the voltages vbat1, vbat2, vbat3, and vbat4 from the batteries connected to the m61041fp, multiplied by gamp1 (1.0), are output from the analog_out pin. it is also possible to output an offset voltage. in the power-save mode all the switches are turned off, so the current consumption of this circuit block is zero. note : the settling time of this circuit block after voltage changes is about 50 s. gnd vin_4 vin_3 vin_1 vin_2 vbat4 vbat3 vbat2 vbat1 s01 s02 s42 s41 s32 s31 switch control from serial/parallel converter circuit logic circuit s22 s21 s11 v o ff g nd to analog_out r2 r1 r1 r2 r2=r1 figure 6 battery voltage detect circuit
m61041fp rev.1.0, sep.19.2003, page 14 of 28 battery voltage monitoring method to select battery voltage detection, serial data (51) 8 is sent from reset status (00) 8 . the v1 battery voltage (vin1) is output from the analog output pin by sending (10) 8 . next, (14) 8 is sent to switch the analog output pin from the v1 battery voltage to the v1 offset voltage (voff1). the actual voltage (vbat1) can be obtained by the microprocessor by calculating vbat1 = (vin1 ? voff1) / gamp . the same method can be used for vbat2 to vbat4 in order to monitor the battery voltage with a high degree of accuracy. (2) charge/discharge current detect block as shown in figure 7, the charge/discharge current detect block of the m61041fp consists of a preamplifier current output shift voltage adjustment circuit, a buffer amplifier, and dividing resistors. the voltage difference indicated by the sensor resistor is amplified to the ground reference voltage by the preamplifier. the gain can be switched using serial signals from the microprocessor. the output is impedance converted by the buffer amplifier. it is also possible to switch the current detect shift voltage using the microprocessor. rsense amp4 amp3 gnd vin_11 charge current monitor charge current monitor from serial/parallel converter circuit from serial/parallel converter circuit r r rc3 rc2 rc1 gnd rd3 rd2 rd1 to analog_out shift voltage adjustment circuit vreg = 5.2v r r amp1 amp2 figure 7 charge/discharge current detect block figure 8 illustrates the circuit block?s operation during discharge current detection. the discharge current flows into rsense, and any voltage drop that occurs is applied to the positive terminal of the amplifier (amp1). the amplifier?s gain can be increased by an instruction from the microprocessor, making it possible to monitor even minute discharge currents with high accuracy. to allow monitoring of the charge current, the voltage generated by vin_11 is inverted and amplified before being output. the other aspects use the same operating principle as that described above.
m61041fp rev.1.0, sep.19.2003, page 15 of 28 from interface circuit charge current icha discharge current idis va=idis rsens gain rsense gnd vin_11 rc3 rc2 rc1 rd3 rd2 amp2 amp1 rd1 vb=icha rsens gain figure 8 charge/discharge current detect explanation diagram (3) overcurrent detect circuit block as shown in figure 9, the overcurrent detect circuit block of the m61041fp consists of a comparator, a reference voltage circuit, and a delay circuit. the detection voltage can be adjusted by trimming, making possible highly accurate voltage detection in conjunction with a sensor resistor. in addition, it is possible to determine when the m61041fp is in overcurrent detect status by monitoring the cin pin using the microprocessor. the m61041fp is also equipped with a simplified load detect circuit. based on the status of the vin12 pin it is possible to provide protection with a shorter delay time than when using overcurrent detection. to microprocessor vin_12 dfout cin rsense gnd vin_11 vref1 + - delay circuit battery figure 9 overcurrent detect circuit block
m61041fp rev.1.0, sep.19.2003, page 16 of 28 (4) series regulator the series regulator circuit is shown in figure 10. a pch mos transistor is used as the output control transistor. the output voltage is adjusted by the m61041fp internally, so no external devices, such as resistors, are required. note : due to the structure of the control transistor a parasite diode is formed between vcc and vreg. this means that the m61041fp can be destroyed by reverse current if the vreg potential exceeds vcc. consequently, vreg should be limited to vcc + 0.3 v or less. on/off vref1 + - vreg m1 r 1 r 2 vcc from serial/parallel converter circuit figure 10 series regulator digital data format decoder 6-bit shift register address first last current gain adjuster latch fet controller latch output selector latch vr, overcurrent controller latch battery voltage adjuster latch shift voltage adjuster latch figure 11 serial/parallel converter circuit block diagram
m61041fp rev.1.0, sep.19.2003, page 17 of 28 data timing diagram (model) figure 12 serial/parallel converter circuit timing chart data content table 5 address data setting data d5 d4 d3 d2 d1 d0 content reset 0 0 0 ? ? ? battery voltage selector 0 0 1 ? ? ? see table 8 current output shift voltage adjuster 0 1 0 ? ? ? see table 9 current monitor gain adjuster 0 1 1 ? ? ? see table 10 fet controller 1 0 0 ? ? ? see table 11 output selector 1 0 1 ? ? ? see table 12 regulator overcurrent detection controller 1 1 1 ? ? ? see table 13 data content table 6 battery voltage selector d5 to d3 d2 d1 d0 output voltage note 001 0 0 0 v1 voltage selected after reset 001 0 0 1 v2 voltage 001 0 1 0 v3 voltage 001 0 1 1 v4 voltage 001 1 0 0 v1 offset voltage 001 1 0 1 v2 offset voltage 001 1 1 0 v3 offset voltage 001 1 1 1 v4 offset voltage v1 voltage is selected after reset. table 7 current output shift voltage adjuster d5 to d3 d2 d1 d0 current output shift voltage value note 010 0 0 0 0 v (no shift voltage) selected after reset 010 0 0 1 0 v (no shift voltage) 010 0 1 0 0 v (no shift voltage) 010 0 1 1 0 v (no shift voltage) 010 1 0 0 1v vreg/25 5 010 1 0 1 2v vreg/25 10 010 1 1 0 3v vreg/25 15 010 1 1 1 3.6v vreg/25 18 no current output shift voltage after reset.
m61041fp rev.1.0, sep.19.2003, page 18 of 28 table 8 charge/discharge current detector d5 to d3 d2 d1 d0 output gain switch note 011 0 0 0 amplifier off selected after reset 011 0 0 1 40 (current value output) 011 0 1 0 100 (current value output) 011 0 1 1 200 (current value output) 011 1 0 0 amplifier off same as after reset 011 1 0 1 40 (offset output) 011 1 1 0 100 (offset output) 011 1 1 1 200 (offset output) amplifier off after reset. table 9 fet controller d5 to d3 d2 d1 d0 cfout dfout note 100 0 0 0 high high selected after reset 100 0 0 1 low high 100 0 1 0 high low 100 0 1 1 low low 100 1 0 0 don t care don t care 100 1 0 1 don t care don t care 100 1 1 0 don t care don t care 100 1 1 1 don t care don t care dfout and cfout pins set to off after reset. (current control fet is off when output is high level.) table 10 output selector d5 to d3 d2 d1 d0 output selection note 101 0 0 0 ground output selected after reset 101 0 0 1 battery voltage value output 101 0 1 0 charge current value output 101 0 1 1 discharge current value output 101 1 0 0 don t care 101 1 0 1 don t care 101 1 1 0 don t care 101 1 1 1 don t care ground potential output after reset. table 11 regulator, overcurrent detection controller d5 to d3 d2 d1 d0 voltage regulator output overcurrent detect circuit note 111 0 0 0 on on selected after reset 111 0 0 1 off off both circuits off 111 0 1 0 on cin pin fixed low overcurrent circuit off 111 0 1 1 on cin pin fixed high overcurrent circuit off 111 1 0 0 don t care don t care 111 1 0 1 don t care don t care 111 1 1 0 don t care don t care 111 1 1 1 don t care don t care regulator output and overcurrent circuit both on after reset. note: a setting of 111001 caused the m61041fp to transition to the power-down mode. however, transition to the power-down mode does not occur when connected to a charger (vin_12 is high level).
m61041fp rev.1.0, sep.19.2003, page 19 of 28 timing charts charging sequence 0 2 4 6 vreg (v) -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0 1 2 3 4 5 battery voltage (v) 0 5 10 15 20 0 5 10 15 20 0 5 10 15 20 battery voltage (v) 0 2 4 6 vbat4 reaches overcharge detect voltage during charging during discharge end of charging charging time start of charging start of charging vcc pin vin_12 pin vin_1 pin microprocessor operation start gain 200 gain 40 charge current monitor charger connected instruction from microprocessor instruction from microprocessor instruction from microprocessor off during initialization off during initialization charger connected battery voltage monitor battery 1 monitor battery 2 monitor battery 3 monitor battery 4 monitor from bottom: vbat1, vbat2, vbat3, vbat4 note: a fixed-voltage charger is used. figure 13 charging sequence
m61041fp rev.1.0, sep.19.2003, page 20 of 28 discharge sequence -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0 1 2 3 4 5 battery voltage (v) 0 5 10 15 20 0 5 10 15 20 0 5 10 15 20 battery voltage (v) 0 2 4 6 0 2 4 6 from top: vbat1, vbat2, vbat3, vbat4 vbat4 reaches excess discharge detect voltage during discharge during charging discharge time start of discharge end of discharge vcc pin vin_12 pin pulled down to ground potential when discharge prohibited vin_1 pin discharge current monitor gain 200 gain 40 battery 1 monitor battery 2 monitor battery 3 monitor battery 4 monitor self-discharge time end of discharge instruction from microprocessor instruction from microprocessor system stop off in power-down mode load connection battery voltage monitor off in power-down mode instruction from microprocessor figure 14 discharge sequence
m61041fp rev.1.0, sep.19.2003, page 21 of 28 overcurrent sequence -0.2 0 0.2 0.4 0.6 0.8 0 1 2 3 4 5 battery voltage (v) 0 5 10 15 20 0 5 10 15 20 0 5 10 15 20 battery voltage (v) 0 2 4 6 0 2 4 6 vbat1=vbat2=vbat3=vbat4 rush current during discharge rush current end of discharge end of discharge vcc pin vin_12 pin vin_1 pin discharge current monitor gain 40 overcurrent load short overcurrent load short figure 15 overcurrent sequence
m61041fp rev.1.0, sep.19.2003, page 22 of 28 principal item characteristics overall current consumption (isup1)-power supply voltage (vcc) characteristics current consumption (isup1)-temperature (ta) characteristics vcc=14v current consumption (isup2)-power supply voltage (vcc) characteristics current consumption (isup3)-temperature (ta) characteristics vcc=14v 5v 10v 15v 20v 25v 30v 5v 10v 15v 20v 25v 30v current consumption (ips)-power supply voltage (vcc) characteristics current consumption (ips)-temperature (ta) characteristics vcc=14v current consumption (ipd)-power supply voltage (vcc) characteristics current consumption (ipd)-temperature (ta) characteristics vcc=14v 5v 10v 15v 20v 25v 30v 5v 10v 15v 20v 25v 30v
m61041fp rev.1.0, sep.19.2003, page 23 of 28 regulator block regulator output voltage (vreg)-power supply voltage (vcc) characteristics temp.=100?c regulator output voltage (vreg)-temperature (ta) characteristics vcc=30v regulator output voltage (vreg)-power supply voltage (vcc) characteristics temp.=25?c regulator output voltage (vreg)-temperature (ta) characteristics vcc=14v 5.10 5.15 5.20 5.25 5.30 5v 10v 15v 20v 25v 30v 30ma 20ma 10ma 0.1ma 5.10 5.15 5.20 5.25 5.30 -50c -25c 0c 25c 50c 75c 100c 30ma 20ma 10ma 0.1ma 5.10 5.15 5.20 5.25 5.30 5v 10v 15v 20v 25v 30v 30ma 20ma 10ma 0.1ma 5.10 5.15 5.20 5.25 5.30 -50c -25c 0c 25c 50c 75c 100c 30ma 20ma 10ma 0.1ma regulator output voltage (vreg)-power supply voltage (vcc) characteristics temp.=-25?c regulator output voltage (vreg)-temperature (ta) characteristics vcc=6v regulator output voltage (vreg)-output current (ireg) characteristics temp.=25?c regulator output voltage (vreg)-output current (ireg) characteristics vcc=14v 5.10 5.15 5.20 5.25 5.30 5v 10v 15v 20v 25v 30v 30ma 20ma 10ma 0.1ma 5.10 5.15 5.20 5.25 5.30 -50c -25c 0c 25c 50c 75c 100c 30ma 20ma 10ma 0.1ma 0v 1v 2v 3v 4v 5v 6v 0.00a 0.05a 0.10a 0.15a 0.20a 0.25a 6v 14v 30v 0v 1v 2v 3v 4v 5v 6v 0.00a 0.05a 0.10a 0.15a 0.20a 0.25a 90c 25c -30c
m61041fp rev.1.0, sep.19.2003, page 24 of 28 overcurrent detect block overcurrent hold detect voltage (vcc-viovx)-temperature (ta) characteristics vcc=14v overcurrent 1 detect delay time (tiov1)-capacitance (cict) characteristics vcc=14v 0ms 50ms 100ms 150ms 200ms 250ms 300ms 350ms 400ms 450ms 500ms 2.0v 2.2v 2.4v 2.6v 2.8v 3.0v -30 o c0 o c30 o c60 o c90 o c overcurrent 1 detect voltage (viov1)-temperature (ta) characteristics vcc=14v overcurrent 1 detect delay time (tiov1)-temperature (ta) characteristics vcc=14v overcurrent 2 detect voltage (vcc/viov2)-temperature (ta) characteristics vcc=14v overcurrent 2 detect delay time (tiov2)-temperature (ta) characteristics vcc=14v 0.18v 0.19v 0.20v 0.21v 0.22v -30 o c0 o c30 o c60 o c90 o c -30 o c0 o c30 o c60 o c90 o c 1.8 2.2 2.6 3.0 3.4 3.8 4.2 -30 o c0 o c30 o c60 o c90 o c 7ms 9ms 11ms 13ms 15ms -30 o c0 o c30 o c60 o c90 o c
m61041fp rev.1.0, sep.19.2003, page 25 of 28 battery voltage detect block battery voltage input offset voltage (voff1)-temperature (ta) characteristics vreg=5.2v battery voltage amplification ratio 1 (gamp1)-temperature (ta) characteristics vreg=5.2v -1.00% -0.75% -0.50% -0.25% 0.00% 0.25% 0.50% 0.75% 1.00% -30oc 0oc 30oc 60oc 90oc v1_gain_err v2_gain_err v3_gain_err v4_gain_err 0.10v 0.15v 0.20v 0.25v 0.30v 0.35v 0.40v -30oc 0oc 30oc 60oc 90oc v1_offset v2_offset v3_offset v4_offset discharge xxxxx battery voltage input offset voltage (voff2)-temperature (ta) characteristics vreg=5.2v discharge current input offset voltage (voff2)-temperature (ta) characteristics vreg=5.2v battery voltage amplification ratio (gamp2)-temperature (ta) characteristics vreg=5.2v discharge current amplification ratio (gamp2)-temperature (ta) characteristics vreg=5.2v 6mv 8mv 10mv 12mv 14mv 16mv 18mv -30 o c0 o c30 o c60 o c90 o c offset 40 offset100 offset200 6mv 8mv 10mv 12mv 14mv 16mv 18mv -30 o c0 o c30 o c6 o c90 o c offset 40 offset100 offset200 -4% -3% -2% -1% 0% 1% 2% 3% 4% -30 o c0 o c30 o c60 o c90 o c gain_err40 gain_err100 gain_err200 -4% -3% -2% -1% 0% 1% 2% 3% 4% -30 o c0 o c30 o c60 o c90 o c gain_err40 gain_err100 gain_err200
m61041fp rev.1.0, sep.19.2003, page 26 of 28 sample application circuit m37516 2 nd protect vin_2 vin_4 vin_3 vin_1 rin3 rin2 cin4 cin3 cin2 cin1 rin1 vin _2 vcc to + terminal dfout cfout vreg vdd vref vin_12 rsense vss vin_11 out sence rin12 dfet cfet creg cin1 vcc vin_1 vin_3 analog_ou ad_in2 ad_in1 cin11 rin11 cict cin reset ck di cs agnd dgnd to - terminal vin_4 battery 4 battery 3 battery 2 battery 1 cin_1 ck di cs rin4 m61041fp cvcc vin vou voltage detect circuit vdet see note 1. see note 2. ccf rcf see note 3. figure 16 sample application circuit notes on circuit board design 1. the current sensor resistor (rsense) should be located adjacent to the vss and vin_11 pins of the m61041fp. in addition, no circuitry other than that recommended above should be added between the m61041fp and rsense. any extraneous current flow in this channel could result in errors when measuring the charge and discharge currents. 2. the load capacitance of the analog_out pin, including parasite capacitance, should be no more than 10 pf. if a capacitor of more than 10 pf is connected, the output from analog_out may begin to oscillate. 3. power supply fluctuations during overcurrent detection and when connected to a charger may cause the m61041fp to reset. it is possible to prevent incorrect operation by connecting a cr filter to the control signal of the charge control fet.
m61041fp rev.1.0, sep.19.2003, page 27 of 28 table 12 external device constants device symbol purpose recommen ded value min. max. notes pch mosfet dfet discharge control ? ? ? ? pch mosfet cfet charge control ? ? ? ? resistor rin1 esd countermeasure 10 ? ? 1k ? capacitor cin1 power supply fluctuation countermeasure 0.22 f ? 1.0 f 1) values differ among rin2 to rin4. resistor rin2 esd countermeasure 1k ? ? 1m ? capacitor cin2 power supply fluctuation countermeasure 0.22 f ? 1.0 f ? resistor rin3 esd countermeasure 1k ? ? 1m ? capacitor cin3 power supply fluctuation countermeasure 0.22 f ? 1.0 f 2) rin2 and cin2 should be set to the same value. resistor rin4 esd countermeasure 1k ? ? 1m ? capacitor cin4 power supply fluctuation countermeasure 0.22 f ? 1.0 f 2) rin2 and cin2 should be set to the same value. resistor rin11 power supply fluctuation countermeasure 100 ? ? 200 ? capacitor cin11 power supply fluctuation countermeasure 0.1 f ? 1.0 f 3) the upper value for confirmation of overcurrent operation should be adjusted as necessary. resistor rin12 charger reverse connection countermeasure 10k ? 300 ? 100k ? capacitor cin12 power supply fluctuation countermeasure 0.01 f ? 0.1 f 3) the upper value for confirmation of overcurrent operation should be adjusted as necessary. capacitor cvcc power supply fluctuation countermeasure 0.22 f ? ? ? sensor resistor rsense charge/discharge current monitoring 20m ? ? ? ? capacitor cict delay time setting 0.01 f ? 0.47 f ? capacitor creg output voltage fluctuation countermeasure 4.7 f 0.47 f ? ? resistor rcf power supply fluctuation countermeasure 1k ? 500 ? ? capacitor ccf power supply fluctuation countermeasure 0.1 f 0.047 f ? 3) the upper value for confirmation of overcurrent operation should be adjusted as necessary. note: when designing applications, due consideration should be given to safety.
m61041fp rev.1.0, sep.19.2003, page 28 of 28 package dimensions 16p2x note : please contact renesas technology corporation for further details.
? 2003. renesas technolo gy corp., all ri g hts reserved. printed in japan . colo p hon 1.0 keep safet y first in y our circuit desi g ns ! 1. renesas technolo gy corp. puts the maximum effort into makin g semiconductor products better and more reliable, but there is alwa y s the possibilit y that trouble m a y occur with them. trouble with semiconductors ma y lead to personal in j ur y , fire or propert y dama g e . remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placem ent of substitutive, auxiliary circuits, (ii) use of nonflammable material or (iii) prevention against any malfunction or mishap. notes regarding these materials 1. these materials are intended as a reference to assist our customers in the selection of the renesas technology corp. product best suited to the customer's application; they do not convey any license under any intellectual property rights, or any other rights, belonging to renesas t echnology corp. or a third party. 2. renesas technology corp. assumes no responsibility for any damage, or infringement of any third-party's rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or circuit application examples contained in these materials. 3. all information contained in these materials, including product data, diagrams, charts, programs and algorithms represents i nformation on products at the time of publication of these materials, and are subject to change by renesas technology corp. without notice due to product improvement s or other reasons. it is therefore recommended that customers contact renesas technology corp. or an authorized renesas technology corp. product distrib utor for the latest product information before purchasing a product listed herein. the information described here may contain technical inaccuracies or typographical errors. renesas technology corp. assumes no responsibility for any damage, liability, or other loss rising from these inaccuracies or errors. please also pay attention to information published by renesas technology corp. by various means, including the renesas tech nology corp. semiconductor home page (http://www.renesas.com). 4. when using any or all of the information contained in these materials, including product data, diagrams, charts, programs, a nd algorithms, please be sure to evaluate all information as a total system before making a final decision on the applicability of the information and products. renesas technology corp. assumes no responsibility for any damage, liability or other loss resulting from the information contained herein. 5. renesas technology corp. semiconductors are not designed or manufactured for use in a device or system that is used under ci rcumstances in which human life is potentially at stake. please contact renesas technology corp. or an authorized renesas technology corp. product distributor when considering the use of a product contained herein for any specific purposes, such as apparatus or systems for transportation, vehicular, medical, aerosp ace, nuclear, or undersea repeater use. 6. the prior written approval of renesas technolo gy corp. is necessar y to reprint or reproduce in whole or in part these materials . 7 . if these products or technolo g ies are sub j ect to the japanese export control restrictions, the y must be exported under a license from the japanese g overnment and cannot b e imported into a countr y other than the approved destination. an y diversion or reexport contrar y to the export control laws and re g ulatio n s of japan and/or the countr y of destination is prohibited . 8. please contact renesas technolo gy corp. for further details on these materials or the products contained therein . s ales strate g ic plannin g div. nippon bld g ., 2-6-2, ohte-machi, chi y oda-ku, tok y o 100-0004, japa n htt p ://www.renesas.co m renesas technology america, inc. 450 holger way, san jose, ca 95134-1368, u.s.a tel: <1> (408) 382-7500 fax: <1> (408) 382-7501 renesas technology europe limited. dukes meadow, millboard road, bourne end, buckinghamshire, sl8 5fh, united kingdom tel: <44> (1628) 585 100, fax: <44> (1628) 585 900 renesas technology europe gmbh dornacher str. 3, d-85622 feldkirchen, germany tel: <49> (89) 380 70 0, fax: <49> (89) 929 30 11 renesas technology hong kong ltd. 7/f., north tower, world finance centre, harbour city, canton road, hong kong tel: <852> 2265-6688, fax: <852> 2375-6836 renesas technology taiwan co., ltd. fl 10, #99, fu-hsing n. rd., taipei, taiwan tel: <886> (2) 2715-2888, fax: <886> (2) 2713-2999 renesas technology (shanghai) co., ltd. 26/f., ruijin building, no.205 maoming road (s), shanghai 200020, china tel: <86> (21) 6472-1001, fax: <86> (21) 6415-2952 renesas technology singapore pte. ltd. 1, harbour front avenue, #06-10, keppel bay tower, singapore 098632 tel: <65> 6213-0200, fax: <65> 6278-8001 renesas sales offices

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