Smart battery protection and monitoring IC M61040FP DESCRIPTION The M61040FP is intended to be used as SB: Smart Battery. PIN configuration (Top view) All functions needed for SB are packed to this M61040FP. The 1 20 Vreg functions such as a detection or calculation of SB Remaining Capacity. CFOUT 2 19 Vref PFOUT 3 18 Reset DFOUT 4 17 DI 16 CK 15 CS 14 Analog_out Over Current detection circuit dedicated in M61040FP will give safety FET on/off control independent from microcomputer control. M61040FP VCC combination use with Microcomputer such as M37515 will give various VIN_1 5 The amp gain of charge/discharge current detection circuit is controlled VIN_2 6 by microcomputer, therefore the accuracy of SB’s Remaining Capacity VIN_3 7 Detection becomes better than before. The reset circuit and The linear VIN_4 8 13 CIN regulator for Vcc / Vref of microcomputer are dedicated in M61040FP. So VIN_12 9 12 VIN_11 10 11 VIN_10 GND this will help easy design of power circuit design of SB. FEATURE 20P-TSSOP 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 Block diagram VIN_12 CFOUT PFOUT DFOUT CIN VCC Vreg Over current detection circuit Series Regulator Vref Delay circuit Regulator ON/OFF and Reset circuit Reset VIN_1 CK DI Battery cell Serial to Parallel conversion circuit voltage VIN_2 detection circuit CS VIN_3 Gain selector VIN_4 Analog _OUT Battery cell 1-4 voltage analog output Multi- plexer circuit Offset control Charge/Discharge current detection circuit GND VIN_11 Mitsubishi Electric (1/25) VIN_10 Smart battery protection and monitoring IC M61040FP 1. Explanation of terminals Table 1. PIN Symbol Functions 5 VIN 1 Battery 1 + voltage input 6 VIN 2 Battery 1 – voltage and Battery 2 + voltage input 7 VIN 3 Battery 2 – voltage and Battery 3 + voltage input 8 VIN 4 Battery 3 – voltage and Battery 4 + voltage input 9 VIN 12 Monitoring charger is connected or not 13 CIN 11 VIN 10 Connect capacitor for over current detection delay Charge / discharge current monitor input and connects charge / discharge current Sense resistor 12 VIN 11 Charge / discharge current monitor input and connects charge / discharge current Sense resistor 1 VCC 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 14 Analog OUT 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 Reset signal output to RESET of Microcomputer Various Analog signal outputs to AD-input of Microcomputer Pre-charge FET-Drive Output. The Driver is turned off by Microcomputer. Mitsubishi Electric (2/25) Smart battery protection and monitoring IC M61040FP 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. Mitsubishi Electric (3/25) Smart battery protection and monitoring IC M61040FP 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. Control method Battery voltage detection circuit Software control (through Serial I/F) Table 2 Charge/Discharge detection circuit Ο Over current detection circuit Ο Ο 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. 1.0µA , so drops of battery voltage is prevented. Mitsubishi Electric (4/25) Smart battery protection and monitoring IC M61040FP VIN12 VCC CFOUT GND level DFOUT Control signal from I/F circuit in discharging Vreg PFOUT VIN1 Series Regulator Vref Regulator ON/OFF Control Reset Circuit CK DI Serial to Parallel M61040FP RESET conversion CS 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. Mitsubishi Electric (5/25) Smart battery protection and monitoring IC M61040FP 3. Absolute Maximum Ratings ITEM SYMBOL Absolute maximum rating Supply voltage Power dissipation Operating temperature range Storage temperature range Table 3 CONDITION RATINGS UNIT Vabs 33 V Vcc 30 V PD 750 mW Topr1 − 20 ∼ + 85 °C Tstg − 40 ∼ + 125 °C 4.Electrical Characteristics Table 4 (Ta=25°C VCC=14V ,unless otherwise noted) ITEM SYMBOL CONDITION Min. Typ. Max. UNIT 30 V Circuit TOTAL Supply voltage Vcc Supply current 1 Isup1 Voltage monitor ,V / R , reset ON Current monitor O N 105 200 280 µA 7 Supply current 2 Isup2 Voltage monitor ,V / R , reset ON Current monitor OFF 65 120 165 µA 7 Ips Regulator ON, Non-loading, Reset circuit ON, Others OFF 35 60 85 µA 7 Ipd All operation stop, V I N 1 2 = G N D 0.5 µA 7 Supply current (at Power save mode) Supply current (at Power Down mode) REGULATOR Output voltage Vreg Iout=20mA 5.145 5.2 5.295 V 3 Input and output voltage Vdif0 Iout=20mA 0.3 0.8 V 3 Iout=20mA 100 200 mV 3 I o u t = 5 0 µA ∼ 2 0 m A 30 45 mV 3 Difference VOLTAGE REFERENCE Linear regulation ∆V o u t 1 0 V C C = 6 . 2∼ 24V Load regulation ∆V o u t 2 0 VCC=6.2V Input voltage VIN 0 VCC voltage 30 V Output voltage Vref I o u t = 2 0 0 µA 4.818 4.85 4.917 V 4 Load stability ∆V o u t 2 1 5 45 mV 4 VCL− 0.02 0.2 VCL+ 0.02 V 8 VCC ×0.6 3 VCC 3 VCC ×1.4 3 V 8 7 10 15 mse c 5 150 250 350 µsec 8 Over current inhibit V C C = 6 . 2 V I o u t = 5 0 ∼ 200µA Vcl OVER CURRENT DETECTION Detection voltage 1 Over current inhibit detection voltage 2 Over current inhibit detection delay time1 Over current inhibit detection delay time 2 Vch Load short detection Tvcl C I C T = 0 . 0 1 µF Tvch Mitsubishi Electric (6/25) Smart battery protection and monitoring IC M61040FP Table 4 (Ta=25°C VCC=14V ,unless otherwise noted) ITEM SYMBOL CONDITION DETECTION BATTERY VOLTAGE Min. Typ. Max. UNIT Circuit mV 5 CHARGE/DISCHARGE CURRENT DETECTION Input Offset voltage Voff1 31 208 385 Voltage gain 1 Gamp1 0.99 1.0 1.01 Output source current Isource1 150 µA 10 Output sink current Isink1 150 µA 10 Vref − V o f f 1 4.45 V 5,6 0.2 2 3.8 V 5 Detection voltage of battery cell G a i n = 2 0 0 selected 5 INTERFACE RESET CIRCUIT CONDITIONING Input Offset voltage Voff2 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 µA 9 Output sink current Isink2 150 µA 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 VC SL 0 0.5 V 1 CK input H voltage VCKH 3.5 Vreg V 1 CK input L voltage VC KL 0 0.5 V 1 Detection voltage1 Vdet − 3.045 3.25 3.475 V 2 Release voltage1 Vdet + 4.16 4.2 4.27 V 2 VIN 1 resistor RINV1 4.4 12 27 KΩ 6 VIN 2 resistor RINV2 4.4 12 27 KΩ 6 VIN 3 resistor RINV3 4.4 12 27 KΩ 6 VIN 4 resistor RINV4 4.4 12 27 KΩ 6 Reference period CK TSDI THDI DI TSCS THCS CS Figure 3 Interface Timing Mitsubishi Electric (7/25) Smart battery protection and monitoring IC M61040FP 5. Measurement circuit CFOUT PFOUT DFOUT VIN 12 VCC 14V VREG 5V VIN 1 VREF VIN 2 RESET VIN 3 M61040FP IDI DI VIN 4 ICK CK GND ICS CS VIN 10 ANALOG OUT VIN 11 TEST0 A CIN TEST1 A A Circuit 1 CFOUT PFOUT DFOUT VIN 12 VCC VREG VIN 1 VREF VIN 2 1MΩ V RESET VIN 3 M61040FP DI VIN 4 V CK GND CS VIN 10 ANALOG OUT VIN 11 TEST0 TEST1 CIN Circuit 2 CFOUT PFOUT DFOUT VIN 12 VCC V VREG VIN 1 VREF VIN 2 RESET VIN 3 M61040FP DI VIN 4 CK GND CS VIN 10 ANALOG OUT VIN 11 TEST0 TEST1 CIN Circuit 3 Figure 4- 1 Mitsubishi Electric (8/25) 4.7uF V ↓ Smart battery protection and monitoring IC M61040FP 4.7uF CFOUT PFOUT DFOUT VIN 12 VCC VREG VIN 1 5V VREF VIN 2 RESET VIN 3 M61040FP DI VIN 4 ↓ V CK GND CS VIN 10 ANALOG OUT VIN 11 TEST0 TEST1 CIN Circuit 4 V CFOUT PFOUT DFOUT VIN 12 VCC VREG VIN 1 V1 VIN 2 V2 RESET VIN 3 V3 M61040FP DI VIN 4 V4 Data Input 0.5V↔ 3.5V CK GND CS VIN 10 ANALOG OUT VIN 11 TEST0 V 4.7uF VREF TEST1 V CIN ↓ Circuit 5 I1 A CFOUT PFOUT DFOUT V1 V IN 12 V CC I2 A VREG V IN 1 V2 RESET V IN 3 I3 A M61040FP DI V IN 4 CK GND V3 CS V IN 10 I4 A 4.7uF VREF V IN 2 ANALOG OUT V IN 11 TEST1 TEST2 CIN V4 Circuit 6 Figure 4- 2 Mitsubishi Electric (9/25) Data Input 0.5V↔ 3.5V Smart battery protection and monitoring IC M61040FP Measuring Ipd: Except above : Ipd, Ips, Isup2, Isup1 ON OFF Measuring Ipd: Except above : PFOUT CFOUT A ON OFF DFOUT VIN 12 VCC VREG VIN 1 VREF VIN 2 RESET VIN 3 M61040FP DI VIN 4 Data Input 0V↔ 5V CK GND CS VIN 10 ANALOG OUT VIN 11 TEST1 CIN TEST2 Circuit 7 V CFOUT PFOUT DFOUT V IN 12 V CC 14V VREG V IN 1 V VREF V IN 2 RESET V IN 3 M61040FP 4.7uF DI V IN 4 CK GND CS V IN 10 ANALOG OUT V IN 11 TEST0 TEST1 CIN Circuit 8 CFOUT PFOUT DFOUT VIN 12 VCC 14V VREG VIN 1 4.7uF VREF VIN 2 RESET VIN 3 M61040FP DI VIN 4 Data Input 0.5V↔ 3.5V CK GND Isink CS VIN 10 ANALOG OUT VIN 11 TEST1 TEST2 CIN Circuit 9 Figure 4- 3 Mitsubishi Electric (10/25) A Isource Smart battery protection and monitoring IC M61040FP CFOUT PFOUT DFOUT VIN 12 VCC V1 V2 V3 V4 VREG VIN 1 4.7uF VREF VIN 2 RESET VIN 3 M61040FP DI VIN 4 Data Input 0.5V↔ 3.5V CK GND Isink CS VIN 10 ANALOG OUT VIN 11 TEST1 TEST2 CIN Circuit 10 Figure 4- 4 Mitsubishi Electric (11/25) A Isource Smart battery protection and monitoring IC M61040FP 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 50µs as the standard of settling time by voltage change in this block. VIN 1 S11 Vat1 VIN 2 S22 S21 Vat2 Switch Control VIN 3 S32 From Serial to Parallel conversion circuit Logic Circuit Vat3 S31 VIN 4 Vat4 S42 S41 V I N 10 To Multiplexer circuit Vref S02 GND S01 Figure 5. Battery voltage detection circuit Mitsubishi Electric (12/25) Smart battery protection and monitoring IC M61040FP (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. Vreg = 5.2V Charge current Monitor AMP2 To Multiplexer circuit + AMP3 R + RC3 − − RC1 R From Serial to Parallel conversion circuit RC2 R RD1 R Discharge current Monitor − RD2 + RD3 − + AMP1 From Serial to Parallel conversion circuit AMP4 Offset voltage Adjustment circuit VIN 10 VIN 11 GND Rsence 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 500µs as the standard of settling time by voltage change in this block. Vb = Idis × Rsens × Gain From I/F circuit + RC3 AMP2 − RC1 RC2 RD1 − AMP1 + RD2 Va = Idis × Rsens × Gain VIN 11 RD3 VIN 10 Rsence Charge current Icha Discharge current Idis Figure 7.Charge/Discharge current detection Mitsubishi Electric (13/25) Smart battery protection and monitoring IC M61040FP (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. DF OUT VIN 12 To Microcomputer − Delay circuit Battery + V ref1 CIN VIN 11 VIN 10 Rsense Figure 8.Over current detection circuit (4) Voltage regulator and reference voltage VCC Voltage regulator and reference circuit are shown in Figure 9. Pch MOS transistor is used for output driver. VREF1 − M1 Vreg + ON/OFF The output voltage can be adjusted by VREF2 R1 M61040 itself. So the external resistor is not − required. R2 M1 + NOTE: ON/OFF There is a diode put between Vcc and R3 Vreg terminal to prevent the invert current R4 from damaging this IC when Vcc voltage is Serial to Parallel conversion circuit higher than Vreg voltage. So please always keep Vreg voltage lower than Vcc+0.3V. Figure 9 Voltage regulator circuit Set a condenser on output to suppress input changes or load changes. Mitsubishi Electric (14/25) Vref Smart battery protection and monitoring IC M61040FP (5) Reset circuit The M61040 reset circuit is shown in Figure Vreg 10. This circuit is composed of comparator, R1 reference voltage section and breeder resistor. + The reset output is Nch open drain structure RESET − so the reset delay time depends on external R2 CR value. Vref1 The reset circuit monitors Vreg output to Rh prevent microcomputer abnormal operation when Vcc voltage goes down abnormally. GND Figure 10. Reset circuit (6) Conditioning Circuit The M61040 conditioning circuit is VIN 1 shown in Figure 11. This circuit is composed of switch, resistor and S60 V1 logic circuit. R60 According to the serial data from VIN 2 microcomputer, the logic circuit can S61 individually control the switches (S60, S61 … etc.) to do individual cell V2 discharge to a select voltage. R61 This circuit is capable of making all Switch Control VIN 3 sells discharge at the same time. S62 Logic circuit V3 R62 VIN 4 S63 Serial to Parallel conversion circuit V4 R63 GND Figure.11. Conditioning Circuit Mitsubishi Electric (15/25) Smart battery protection and monitoring IC M61040FP 7. Digital data format MSB First Last DI LSB 6 Bit shift resistor CK D5 CS D4 Address D3 D2 D1 Decoder Latch Latch Latch Latch Latch Latch MPX MPX MPX MPX MPX MPX *1 *2 Offset adjustment Vreg,Vref Multiplexer control control FET,VR control *1 : Charge, discharge current detection *2 : Battery voltage output Figure 12 Serial to Parallel Conversion circuit 8. Data timing Example MSB LSB DI D0 D0 D1 D2 D3 D4 CK CS Figure 13. Serial to parallel timing chart Mitsubishi Electric (16/25) D5 Smart battery protection and monitoring IC M61040FP 9. Data Timing Table 5. ADDRESS ESTABLISHMENT DATA DATA CONTENTS D5 D4 D3 D2 D1 D0 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 OUTPUT VOLTAGE D2 D1 D0 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 •V1 battery voltage output when system reset Offset voltage output 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 Mitsubishi Electric (17/25) Smart battery protection and monitoring IC M61040FP Table 8 Charge and discharge current detection D0 MODE D2 D1 0 0 0 AMP stop, resistor open 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 1 0 1 Offset output (x40) 1 1 0 Offset output (x100) OUTPUT AMP Operation stop, Current save AMP Operation stop, Current save 1 1 1 Offset output (x200) sAmplifier 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 sCFOUT, 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 sMultiplexer output is floating when system reset Mitsubishi Electric (18/25) Smart battery protection and monitoring IC M61040FP 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 sConditioning circuit is floating when system reset Table.12 Regulator, Over Current detection control OUTPUT D2 D1 D0 Regulator 0 0 0 ON Over Current detection circuit ON ∗ ∗ 0 0 1 OFF(GND Output) 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 1 Don′ t Care Don′ t Care sThe 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. Mitsubishi Electric (19/25) Smart battery protection and monitoring IC M61040FP 10. Timing chart CFOUT(V) VIN 11(V) Battery voltage(V) 10-1. Discharge sequence 5 4 3 2 1 0 Vbat4 reaches the over-charge voltage. From low voltage (Vbat1,Vbat2,Vbat3,Vbat4) Charge Period 0.15 0.1 0.05 0 − 0.05 − 0.1 − 0.15 Discharging Charging 20 15 Command from Microcomputer 10 Charge Start Off in initializing Command from Microcomputer 0 PFOUT(V) Charge Stop 5 20 15 10 Off in initializing Command from Microcomputer 5 Command from Microcomputer Pre-charge stop Pre-charge Start 0 DFOUT(V) 20 15 10 Off in initializing Charge Start 5 Command from Microcomputer Vreg RESET Supply Voltage(V) 20 Analog out(V) 0 5 VIN_12pin 15 10 VDDpin 5 VIN_1pin 0 5 RESET Vreg Charger connected 0 Microcomputer starts operations. Gain 40 Gain 200 Pre-charge current Monitor Charge current Monitor 0 Bat1 Monitor Bat3 Bat2 Monitor Monitor Bat4 Monitor ∗Testing in constant voltage Fig.14 Mitsubishi Electric (20/25) Smart battery protection and monitoring IC M61040FP VIN 11(V) Battery Voltage(V) 10-2. Discharge sequence 5 4 3 2 1 0 0.15 0.1 0.05 0 − 0.05 − 0.1 − 0.15 Discharge Period Self discharge period From high voiltage (Vbat1,Vbat2,Vbat3,Vbat4) Vbat4 reaches the over-discharge voltage. Discharge Discharge Start Discharge Stop Charge CFOUT(V) 20 15 Command from Microcomputer 10 5 Command from Microcomputer 0 PFOUT(V) 20 15 10 Command from Microcomputer 5 Command from Microcomputer 0 DFOUT(V) 20 15 Off in power-down mode 10 Discharge stop 5 Command from Microcomputer Supply Voltage(V) 20 Vreg RESET 0 5 15 VIN_1pin 10 VIN 12pin: 5 VDDpin Pulled down to GND in discharge forbidden 0 RESET Vreg System stop Command from Microcomputer Analog out(V) 0 5 0 Gain 200 Gain 40 Discharge current Monitor Bat1 Bat2 Bat3 Monitor Monitor Monitor Bat4 Monitor Fig.15 Mitsubishi Electric (21/25) Smart battery protection and monitoring IC M61040FP VIN 11(V) Battery Voltage(V) 10-3. Over current detection sequence 5 4 Vbat1=Vbat2=Vbat3=Vbat4 3 2 1 0 0.4 0.3 0.2 0.1 0 − 0.1 − 0.2 − 0.3 − 0.4 Rash Current Generation Discharge Over-current Generation Load Short Rash Current Generation Over-current Generation Charge 20 CFOUT(V) Load Short Discharge stop Discharge Stop Discharge Stop Discharge Stop 15 10 5 0 PFOUT(V) 20 15 10 5 0 DFOUT(V) 20 Discharge Stop Discharge Stop 15 10 5 Supply Voltage(V) 20 Vreg RESET 0 5 15 VDD pin 10 5 VIN_1pin VIN_12 pin 0 RESET VCC Analog out(V) 0 5 Gain 40 Discharge current Monitor 0 Fig.16 Mitsubishi Electric (22/25) Smart battery protection and monitoring IC M61040FP 11. Application circuit D2 D1 RPF2 PFET CFET RPF1 + terminal CVCC RIN12 RCF1 VCC RCF2 CFOUT DFET RPF3 DFOUT PFOUT VDD CREF CIN1 VREG RIN2 RRESET RESET RESET M37515 CREG CRESET AD IN1 CK AD IN2 RIN3 VIN 3 CIN3 RIN4 VIN 4 Battery 3 VIN 4 CIN4 Battery 4 CS RCS GND DI RDI DGNDAGND CIN VIN 11 VIN 10 GND RIN11 CICT − terminal Battery 2 VIN 3 CK CS DI VIN 2 CIN2 ANALOG OUT RCK Battery 1 VIN 2 2nd Protect M61040FP Vref VREF VIN 1 VIN 1 VIN 12 COUT Vcc RIN1 CIN11 RSENCE Fig.17 Mitsubishi Electric (23/25) CT Smart battery protection and monitoring IC M61040FP Table.13 Fixed Number Symbol Components Purpose Recommend min. max. Please take dissipation. Please take dissipation. care N.B. the maximum power care the maximum power D1 Diode Supply voltage D2 Diode Supply voltage DFET CFET PFET RCF1 RCF2 RPF1 Pch MOSFET Pch MOSFET Nch MOSFET Resistor Resistor Resistor 1MΩ 100kΩ 1MΩ 100kΩ 100kΩ 3MΩ 1MΩ 3MΩ RPF2 Resistor 1kΩ RPF3 RIN1 Resistor Resistor 100kΩ 10Ω 1MΩ 1kΩ CIN1 Capacitor 0.22µF 1.0µF RIN2 Resistor 1kΩ 10kΩ CIN2 Capacitor 0.22µF 1.0µF RIN3 Resistor 1kΩ 10kΩ CIN3 Capacitor 0.22µF 1.0µF RIN4 Resistor 1kΩ 10kΩ CIN4 Capacitor 0.22µF 1.0µF CICT RIN12 Capacitor Resistor 0.01µF 10kΩ 300Ω 0.47µF 200kΩ CVCC Capacitor 0.22µF RSENCE Sensing resistor 20mΩ RIN11 Resistor 100Ω 1kΩ CIN11 Capacitor 0.1µF 1.0µF CREG Capacitor 4.7µF 0.47µF CREF Capacitor Discharge control Charge control Precharge control Pull down resistor Current limit Pull down resistor Precharge current control Current limit Measure for ESD Measure for ripples of power supply Measure for ESD Measure for ripples of power supply Measure for ESD Measure for ripples of power supply Measure for ESD Measure for ripples of power supply Set up delay time Measure for ESD Measure for ripples of power supply Charge/discharge current monitor Measure for ripples of power supply Measure for ripples of power supply Eliminate the voltage noise Eliminate the voltage noise Set up delay time Set up delay time Pull down resistor Pull down resistor Pull down resistor 4.7µF RRESET CRSET RCK RCS RDI Resistor Capacitor Resistor Resistor Resistor 47KΩ 0.1µF 10kΩ 100kΩ 100kΩ 100kΩ Mitsubishi Electric (24/25) ∗ ∗ 2)Please set up same value as RIN2,CIN2 2)Please set up same value as RIN2,CIN2 3MΩ ∗ 3)It is necessary that you adjust a delay time for MCU. Smart battery protection and monitoring IC M61040FP 12. Package dimensions 6.6 ±0.2 20 11 6.4 ±0.3 4.4 ±0.2 0.5 ±0.2 10 1 0.17 ±0.05 1.00 ±0.05 1.1max. 0.65 0.2 ±0.1 0 ∼ 0.1 Unit :mm Figure.18 Mitsubishi Electric (25/25)