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| Smart battery protection and monitoring IC M61040FP 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 DFOUT VCC CFOUT PFOUT PIN configuration (Top view) 1 2 3 20 19 18 Vreg Vref Reset DI CK CS Analog_out CIN VIN_11 VIN_10 M61040FP 4 5 6 7 8 9 10 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' Remaining Capacity s 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. 17 16 15 14 13 12 11 VIN_1 VIN_2 VIN_3 VIN_4 VIN_12 GND FEATURE l l l l l Built-in high gain op-amps for monitoring charge/discharge current Built-in over current detection circuit for FET protection 20P-TSSOP All FETs are controlled by microcomputer Various powers saving function to reduce total power dissipation High Input Voltage Device(Absolute Maximum Rating:33V) APPLICATION l Smart Battery System Block diagram VIN_12 VCC Vreg Vref Series Regulator Regulator ON/OFF and Reset Reset circuit VIN_1 CK DI CS Serial to Parallel conversion circuit Battery cell voltage detection circuit VIN_3 VIN_2 Over current detection circuit CFOUT PFOUT DFOUT CIN Delay circuit Gain selector VIN_4 Analog _OUT Multi- plexer circuit Offset control Charge/Discharge current detection circuit GND Battery cell 1-4 voltage analog output VIN_11 VIN_10 Mitsubishi Electric (1/25) Smart battery protection and monitoring IC M61040FP 1. Explanation of terminals Table 1. PIN 5 6 7 8 9 13 11 Symbol VIN 1 VIN 2 VIN 3 VIN 4 VIN 12 CIN VIN 10 Battery 1 + voltage input Battery 1 - voltage and Battery 2 + voltage input Battery 2 - voltage and Battery 3 + voltage input Battery 3 - voltage and Battery 4 + voltage input Monitoring charger is connected or not 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 10 20 19 18 14 4 2 17 16 15 3 VCC GND Vreg Vref RESET Functions Power source pin. Power from charger or battery Ground Linear-Regulator output for microcomputer Vreg voltage output for Vreg of Microcomputer, Max 200uA / 5V Reset signal output to RESET of Microcomputer Various Analog signal outputs to AD-input of Microcomputer Discharge FET-Drive Output. The Driver is turned off when over current detected. Charge FET-Drive Output. The Driver is turned off by Microcomputer. Input of 6 bit length serial data from Microcomputer Input of shift clock from Microcomputer. DI' input data is latched by low-to-high edge of s this CK During low signal input to this CS, data input to DI is enabled. Pre-charge FET-Drive Output. The Driver is turned off by Microcomputer. Analog OUT DFOUT CFOUT DI CK CS PFOUT 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' voltage of 3 or 4 series connection. Built-in buffer amplifier is s 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' A to D converter will widen. s 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' software control. s 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' A to D converter. s 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' left issues s 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. Table 2 Charge/Discharge detection circuit Each function can be ON/OFF separately. Control method Software control (through Serial I/F) Battery voltage detection circuit Over current detection circuit 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. 1.0A , so drops of battery voltage is prevented. Mitsubishi Electric (4/25) Smart battery protection and monitoring IC M61040FP VIN12 VCC CFOUT PFOUT DFOUT GND level in discharging Vreg Vref Control signal from I/F circuit VIN1 Series Regulator M61040FP RESET Regulator ON/OFF Control Reset Circuit CK DI CS 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. Mitsubishi Electric (5/25) Smart battery protection and monitoring IC M61040FP 3. Absolute Maximum Ratings ITEM Absolute maximum rating Supply voltage Power dissipation Operating temperature range Storage temperature range SYMBOL Vabs Vcc PD Topr1 Tstg Table 3 CONDITION RATINGS 33 30 750 - 20 + 85 - 40 + 125 UNIT V V mW C C 4.Electrical Characteristics Table 4 (Ta=25 VCC=14V ,unless otherwise noted) C ITEM Supply voltage Supply current 1 SYMBOL Vcc Isup1 Isup2 Ips Ipd Vreg Vdif0 V o u t 1 0 V o u t 2 0 VIN 0 Vref V o u t 2 1 Vcl CONDITION Voltage monitor ,V / R , reset ON Current monitor O N Voltage monitor ,V / R , reset ON Current monitor OFF Regulator ON, Non-loading, Reset circuit ON, Others OFF All operation stop, V I N 1 2 = G N D Iout=20mA Iout=20mA V C C = 6 . 2 24V VCC=6.2V VCC voltage I o u t = 2 0 0 A V C C = 6 . 2 V I o u t = 5 0 200A Iout=20mA Min. 105 65 35 5.145 4.818 VCL- 0.02 Typ. 200 120 60 5.2 0.3 100 30 4.85 5 Max. 30 280 165 85 0.5 5.295 0.8 200 45 30 4.917 45 UNIT V A A A A V V mV mV V V mV Circuit 7 7 7 7 3 3 3 3 TOTAL REGULATOR REFERENCE VOLTAGE Supply current 2 Supply current (at Power save mode) Supply current (at Power Down mode) Output voltage Input and output voltage Difference Linear regulation Load regulation Input voltage Output voltage I o u t = 5 0 A 2 0 m A 4 4 Load stability Over current inhibit 0.2 VCC 3 VCL+ 0.02 VCC x1.4 3 V 8 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 Tvcl Tvch Load short detection C I C T = 0 . 0 1 F VCC x0.6 3 V mse c sec 8 5 8 7 150 10 250 15 350 Mitsubishi Electric (6/25) Smart battery protection and monitoring IC M61040FP Table 4 (Ta=25 VCC=14V ,unless otherwise noted) C ITEM Input Offset voltage BATTERY VOLTAGE CHARGE/DISCHARGE CONDITIONING SYMBOL Voff1 Gamp1 Isource1 Isink1 Vref - V o f f 1 Voff2 Gain21 Gain22 Gain23 Isource2 Isink2 VDIH VDIL VCSH VC SL VCKH VC KL Vdet - Vdet + RINV1 RINV2 RINV3 RINV4 CONDITION Min. 31 0.99 150 150 4.45 Typ. 208 1.0 Max. 385 1.01 UNIT mV A A V V V V V A A V V V V V V V V K K K K Circuit 5 5 10 10 5,6 5 5 5 5 9 9 1 1 1 1 1 1 2 2 6 6 6 6 Voltage gain 1 Output source current DETECTION CURRENT DETECTION CIRCUIT 2 40 100 200 3.8 41.6 104 208 Output sink current Detection voltage of battery cell Input Offset voltage G a i n = 2 0 0 selected 0.2 38.4 96 192 150 150 3.5 0 3.5 0 3.5 0 3.045 4.16 4.4 4.4 4.4 4.4 Voltage gain21 Voltage gain22 Voltage gain23 Output source current 3.25 4.2 12 12 12 12 Vreg 0.5 Vreg 0.5 Vreg 0.5 3.475 4.27 27 27 27 27 Output sink current DI input H voltage DI input L voltage CS input H voltage CS input L voltage CK input H voltage CK input L voltage RESET Detection voltage1 Release voltage1 VIN 1 resistor VIN 2 resistor VIN 3 resistor VIN 4 resistor INTERFACE Reference period CK TSDI DI THDI TSCS CS THCS Figure 3 Interface Timing Mitsubishi Electric (7/25) Smart battery protection and monitoring IC M61040FP 5. Measurement circuit CFOUT VCC 14V VIN 1 PFOUT DFOUT VIN 12 VREG VREF 5V VIN 2 RESET VIN 3 VIN 4 GND VIN 10 VIN 11 TEST0 TEST1 ANALOG OUT CIN CK CS M61040FP DI IDI ICK ICS A A A Circuit 1 CFOUT VCC VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 TEST0 PFOUT DFOUT VIN 12 VREG VREF RESET 1M V M61040FP DI CK CS ANALOG OUT V TEST1 CIN Circuit 2 CFOUT VCC PFOUT DFOUT VIN 12 VREG VREF RESET 4.7uF V VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 TEST0 TEST1 M61040FP V DI CK CS ANALOG OUT CIN Circuit 3 Figure 4-1 Mitsubishi Electric (8/25) Smart battery protection and monitoring IC M61040FP 4.7uF CFOUT VCC VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 TEST0 TEST1 M61040FP PFOUT DFOUT VIN 12 VREG 5V VREF RESET DI CK CS ANALOG OUT CIN V Circuit 4 V CFOUT VCC V1 V2 V3 V4 VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 PFOUT DFOUT VIN 12 VREG VREF RESET 4.7uF M61040FP DI CK CS ANALOG OUT Data Input 0.5V 3.5V V TEST0 TEST1 CIN V Circuit 5 I1 V1 V CC I2 V2 I3 V3 I4 V4 A CFOUT PFOUT DFOUT V IN 12 VREG VREF RESET M61040FP DI CK CS ANALOG OUT TEST1 TEST2 CIN Data Input 0.5V 3.5V 4.7uF A V IN 1 V IN 2 V IN 3 A V IN 4 GND V IN 10 A V IN 11 Circuit 6 Figure 4-2 Mitsubishi Electric (9/25) Smart battery protection and monitoring IC M61040FP Measuring Ipd: Except above : ON OFF Ipd, Ips, Isup2, Isup1 CFOUT PFOUT DFOUT VIN 12 VREG VREF RESET M61040FP DI CK CS ANALOG OUT TEST1 TEST2 CIN Measuring Ipd: Except above : ON OFF A VCC VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 Data Input 0V 5V Circuit 7 V CFOUT V CC 14V V IN 1 V IN 2 V IN 3 V IN 4 GND V IN 10 V IN 11 TEST0 TEST1 M61040FP PFOUT DFOUT V IN 12 VREG VREF RESET DI CK CS ANALOG OUT CIN 4.7uF V Circuit 8 CFOUT VCC 14V VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 TEST1 PFOUT DFOUT VIN 12 VREG VREF RESET 4.7uF M61040FP DI CK CS ANALOG OUT Isink Data Input 0.5V 3.5V A Isource TEST2 CIN Circuit 9 Figure 4-3 Mitsubishi Electric (10/25) Smart battery protection and monitoring IC M61040FP CFOUT VCC V1 V2 V3 V4 VIN 1 VIN 2 VIN 3 VIN 4 GND VIN 10 VIN 11 TEST1 PFOUT DFOUT VIN 12 VREG VREF RESET 4.7uF M61040FP DI CK CS ANALOG OUT Isink Data Input 0.5V 3.5V A Isource TEST2 CIN Circuit 10 Figure 4-4 Mitsubishi Electric (11/25) 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 50s as the standard of settling time by voltage change in this block. VIN 1 S11 Vat1 VIN 2 S22 Vat2 S21 Switch Control VIN 3 S32 From Serial to Parallel conversion circuit Logic Circuit Vat3 S31 VIN 4 S42 Vat4 S41 To Multiplexer circuit V I N 10 S02 GND S01 Vref 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 To Multiplexer circuit AMP3 R + - R RC1 AMP2 + - RC2 Charge current Monitor RC3 From Serial to Parallel conversion circuit R R RD1 - + - + AMP1 AMP4 From Serial to Parallel conversion circuit VIN 11 VIN 10 Rsence GND Discharge current Monitor RD2 RD3 Offset voltage Adjustment circuit 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' command is capable of monitoring very little s 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 500s as the standard of settling time by voltage change in this block. Vb = Idis x Rsens x Gain + AMP2 From I/F circuit - RC3 RC2 RC1 RD1 - + RD2 RD3 VIN 10 Rsence AMP1 Va = Idis x Rsens x Gain VIN 11 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. VIN 12 DF OUT To Microcomputer CIN Delay circuit - + V ref1 Battery VIN 11 VIN 10 Rsense 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. VREF1 - + ON/OFF M1 VCC Vreg VREF2 R1 - R2 + ON/OFF R3 Vref M1 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. R4 Serial to Parallel conversion circuit Figure 9 Voltage regulator circuit Mitsubishi Electric (14/25) Smart battery protection and monitoring IC M61040FP (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. GND Vref1 Rh R2 R1 + - Vreg RESET Figure 10. Reset circuit (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 V2 S61 R60 VIN 2 V1 VIN 1 S60 discharge to a select voltage. R61 Switch Control This circuit is capable of making all sells discharge at the same time. VIN 3 S62 V3 Logic circuit R62 VIN 4 S63 V4 Serial to Parallel conversion circuit GND R63 Figure.11. Conditioning Circuit Mitsubishi Electric (15/25) Smart battery protection and monitoring IC M61040FP 7. Digital data format MSB DI CK D5 D4 D3 D2 D1 D0 Last First LSB 6 Bit shift resistor CS Address Decoder Latch MPX Offset adjustment Latch MPX Latch MPX Latch MPX FET,VR control Latch MPX *1 Latch MPX *2 Vreg,Vref Multiplexer control control *1 : Charge, discharge current detection *2 : Battery voltage output Figure 12 Serial to Parallel Conversion circuit 8. Data timing Example LSB DI D0 D1 D2 D3 D4 D5 MSB CK CS Figure 13. Serial to parallel timing chart Mitsubishi Electric (16/25) Smart battery protection and monitoring IC M61040FP 9. Data Timing ESTABLISHMENT DATA Reset Battery voltage output Offset adjustment Charge/discharge current detection Table 5. ADDRESS D5 0 0 0 0 1 1 1 1 D4 0 0 1 1 0 0 1 1 D3 0 1 0 1 0 1 0 1 D2 DATA D1 D0 CONTENTS Refer to table 6. Refer to table 7. Refer to table 8. Refer to table 9. Refer to table 10. Refer to table 11. Refer to table 12. FET control Multiplexer select Conditioning circuit Regulator Over current control D2 0 0 0 0 1 1 1 D1 0 0 1 1 0 0 1 D0 0 1 0 1 0 1 0 Table 6 Battery voltage output OUTPUT VOLTAGE V1 V2 V3 V4 Connect to VIN_2 Connect to VIN_3 Connect to VIN_4 DETAIL Offset voltage output Offset voltage output Offset voltage output Offset voltage output 1 1 1 Connect to VIN_10 * battery voltage output when system reset V1 Table 7 Offset voltage control section of discharge current monitor amplifier OUTPUT D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 Offset voltage value No offset (0V) 1V 2.1V 3.1V 3.7V 1V 1V 1V * offset voltage when system reset No Mitsubishi Electric (17/25) Smart battery protection and monitoring IC M61040FP Table 8 Charge and discharge current detection D0 MODE 0 1 0 1 0 1 0 AMP stop, resistor open gain x40 output gain x100 output gain x200 output AMP stop, resistor open Offset output (x40) Offset output (x100) AMP Operation stop, Current save D2 0 0 0 0 1 1 1 D1 0 0 1 1 0 0 1 OUTPUT AMP Operation stop, Current save 1 1 1 Offset output (x200) s Amplifier operation is stopped when system reset Table 9 FET regulator control FET CONNECTION TERMINAL D2 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 CFOUT terminal High High High High Low Low Low Low DFOUT terminal High High Low Low High High Low Low PFOUT terminal High Low High Low High Low High 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 0 0 0 0 1 1 1 1 D1 0 0 1 1 0 0 1 1 D0 0 1 0 1 0 1 0 1 OUTPUT open output (floating) select open output (floating) select open output (floating) select open output (floating) select Charge current output select Discharge current output select Battery voltage output select 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 0 0 0 0 1 1 1 D1 0 0 1 1 0 0 1 D0 0 1 0 1 0 1 0 OUTPUT OPEN V1 Conditioning (Short VIN_1 and VIN_2) V2 Conditioning (Short VIN_2 and VIN_3) V3 Conditioning (Short VIN_3 and VIN_4) V4 Conditioning (Short VIN_4 and GND) V1 ~ V4 Conditioning (Discharge All cells) OPEN 1 1 1 OPEN s Conditioning circuit is floating when system reset Table.12 Regulator, Over Current detection control OUTPUT D2 0 0 0 0 1 1 1 D1 0 0 1 1 0 0 1 D0 0 1 0 1 0 1 0 Regulator Over Current detection circuit ON OFF(GND Output) 1 ON ON DonCare t DonCare t DonCare t ON 1 Capacity Delay terminal L fix Capacity Delay terminal H fix DonCare t DonCare t DonCare t 1 1 1 DonCare t DonCare t 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 10-1. Discharge sequence Battery voltage(V) 5 4 3 2 1 0 0.15 0.1 0.05 0 - 0.05 - 0.1 - 0.15 20 15 10 5 0 PFOUT(V) 20 15 10 5 0 20 DFOUT(V) 15 10 Off in initializing 5 0 Vreg RESET Supply Voltage(V) 20 15 10 5 0 5 RESET Vreg Charger connected 0 5 Microcomputer starts operations. Gain 200 Pre-charge current Monitor 0 Gain 40 Bat4 Monitor VDDpin VIN_1pin VIN_12pin Charge Start Command from Microcomputer Off in initializing Command from Microcomputer Pre-charge Start Command from Microcomputer Pre-charge stop Command from Microcomputer Off in initializing Charge Start Command from Microcomputer Charge Stop Vbat4 reaches the over-charge voltage. From low voltage (Vbat1,Vbat2,Vbat3,Vbat4) Charge Period VIN 11(V) Discharging Charging Analog out(V) CFOUT(V) Charge current Monitor Bat1 Monitor Bat3 Bat2 Monitor Monitor Testing in constant voltage Fig.14 Mitsubishi Electric (20/25) Smart battery protection and monitoring IC M61040FP 10-2. Discharge sequence Battery Voltage(V) 5 4 3 2 1 0 0.15 0.1 0.05 0 - 0.05 - 0.1 - 0.15 20 CFOUT(V) 15 10 5 0 20 PFOUT(V) 15 10 5 0 20 DFOUT(V) 15 10 5 0 Supply Voltage(V) 20 15 10 5 0 5 RESET Vreg System stop Command from Microcomputer VIN 12pin: Pulled down to GND in discharge forbidden VDDpin VIN_1pin Discharge stop Off in power-down mode Command from Microcomputer Command from Microcomputer Command from Microcomputer Command from Microcomputer Command from Microcomputer Discharge Period From high voiltage (Vbat1,Vbat2,Vbat3,Vbat4) Vbat4 reaches the over-discharge voltage. Self discharge period VIN 11(V) Discharge Discharge Start Discharge Stop Charge Vreg RESET Analog out(V) 0 5 Gain 200 Gain 40 Bat1 Bat2 Bat3 Monitor Monitor Monitor Bat4 Monitor 0 Discharge current Monitor Fig.15 Mitsubishi Electric (21/25) Smart battery protection and monitoring IC M61040FP 10-3. Over current detection sequence Battery Voltage(V) 5 4 3 2 1 0 0.4 0.3 0.2 0.1 0 - 0.1 - 0.2 - 0.3 - 0.4 20 CFOUT(V) 15 10 5 0 20 PFOUT(V) 15 10 5 0 20 DFOUT(V) 15 10 5 0 Supply Voltage(V) 20 15 10 5 0 5 RESET VCC VIN_12 pin VDD pin VIN_1pin Discharge Stop Discharge Stop Discharge Stop Discharge Stop Vbat1=Vbat2=Vbat3=Vbat4 Rash Current Generation Discharge Over-current Generation Rash Current Generation Over-current Generation Load Short VIN 11(V) Load Short Charge Discharge stop Discharge Stop Vreg RESET 0 Analog out(V) 5 Gain 40 Discharge current Monitor 0 Fig.16 Mitsubishi Electric (22/25) Smart battery protection and monitoring IC M61040FP 11. Application circuit D1 CFET D2 PFET RPF1 CVCC RPF2 + terminal RIN12 VCC VIN 12 VDD VREF CREF VREG Vref RRESET RESET RESET CRESET ANALOG OUT CK RCS RDI CS DI CIN RCF1 DFET RPF3 RCF2 CFOUT PFOUT DFOUT VIN 1 RIN1 CIN1 RIN2 Battery 1 Vcc VIN 1 COUT M61040FP VIN 2 CIN2 RIN3 VIN 3 CIN3 RIN4 VIN 4 CIN4 Battery 4 Battery 3 Battery 2 VIN 2 2nd Protect VIN 3 DGNDAGND - terminal M37515 CREG AD IN1 CK CS DI AD IN2 RCK VIN 4 GND VIN 11 RIN11 VIN 10 GND CT CICT CIN11 RSENCE Fig.17 Mitsubishi Electric (23/25) Smart battery protection and monitoring IC M61040FP Table.13 Fixed Number Symbol D1 D2 DFET CFET PFET RCF1 RCF2 RPF1 RPF2 RPF3 RIN1 CIN1 RIN2 CIN2 RIN3 CIN3 RIN4 CIN4 CICT RIN12 CVCC RSENCE RIN11 CIN11 CREG CREF RRESET CRSET RCK RCS RDI Components Diode Diode Pch MOSFET Pch MOSFET Nch MOSFET Resistor Resistor Resistor Resistor Resistor Resistor Capacitor Resistor Capacitor Resistor Capacitor Resistor Capacitor Capacitor Resistor Capacitor Sensing resistor Resistor Capacitor Capacitor Capacitor Resistor Capacitor Resistor Resistor Resistor Purpose Supply voltage Supply voltage 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 Recommend 1M 100k 1M 1k 100k 10 0.22F 1k 0.22F 1k 0.22F 1k 0.22F 0.01F 10k 0.22F 20m 100 0.1F 4.7F 4.7F 47K 0.1F min. 100k 100k 300 0.47F 10k 100k 100k 100k max. 3M 1M 3M 1M 1k 1.0F 10k 1.0F 10k 1.0F 10k 1.0F 0.47F 200k 1k 1.0F 3M Please take dissipation. Please take dissipation. care care N.B. the the maximum maximum power power 2)Please set up same value as RIN2,CIN2 2)Please set up same value as RIN2,CIN2 3)It is necessary that you adjust a delay time for MCU. Mitsubishi Electric (24/25) Smart battery protection and monitoring IC M61040FP 12. Package dimensions 6.6 0.2 20 11 0.5 0.2 4.4 0.2 1 10 6.4 0.3 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) |
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