MM1301 MITSUBISHI | Alldatasheet

Document overview

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Technical content

Features

1 Overcharge detection voltage

Ta=0~+50°C VCEL±30mV

2 Overcharge detection delay time

CTD=0.082µF 1.0S typ. 3 Current consumption (normal operation VCEL=3.5V) 10µA typ. 4 Current consumption (overdischarge operation VCEL=1.9V) 0.7µA typ.

5 Overcurrent cancel conditions Load removed : Load of 5MΩor greater across battery pack terminals

Applications

Lithium ion battery pack (for battery protection) 1-Cell Protection ICs Package Overcharge Overdischarge Release Overcurrent detection detection Hysteresis Dead time detection voltage Delay SOP-8 VSOP-8 voltage Overcurrent Detec time shot-mode MM1301 AW 4.27V 200mV 2.3V 2.9V 100mV 0.9V BW 4.17V 100mV 2.3V 2.9V 100mV 0.9V CW 4.18V 100mV 2.3V 2.9V 125mV 0.45V DW 4.28V 220mV 2.3V 2.9V 50mV 0.45V EF 4.20V 100mV 2.3V 2.9V 125mV 0.45V FW 4.28V 100mV 2.3V 2.9V 50mV 0.45V GW 4.18V 220mV 2.3V 2.9V 125mV 0.45V HW 4.35V 220mV 2.3V 2.9V 50mV 0.45V JW 4.20V 220mV 2.3V 2.9V 125mV 0.45V at Ctd= 0.082µF min. 0.5S typ. 1S max. 1.5S min. 5mS typ. 10mS max. 15mS min. 5mS typ. 10mS max. 15mS Note : Under open-load conditions, returns to normal mode from overcurrent mode. (For MM1291A to G, J, M, 5MΩor higher; for MM1291H, K, 50MΩor higher)

Protection of Lithium Ion Batteries (one cell) MM1301 Pin Assignment Pin Description VSOP-8A GND GD CS OC N.C TD VCC VIN Pin No. Pin name Function GND Negative power supply pin Also serves as voltage detection pin for battery connected between VIN and GND Gate connection pin for discharge-control FET (N-ch) GD Turns the gate off in overdischarge mode and overcurrent mode. Gate is turned on in overcharge and normal modes. Overcurrent detection input pin CS Discharge current detected by connection to drain pin of discharge-control FET. Discharge current = (CS-GND voltage)/(FET turn-on resistance) Block Diagram

Protection of Lithium Ion Batteries (one cell) MM1301 Recommended Operating Conditions Electrical Characteristics (Except where noted otherwise, Ta=25°C) Item Symbol Ratings Units Operating temperature TOPR -20~+70 Operating voltage VOP +0.9~+18 V Item Symbol Measurement conditions Min. Typ. Max. Units Overcharge detection voltage VOC VCC=VIN=L H, Ta=0~50°C 4.15 4.18 4.21 V Overcharge release voltage VOCR VCC=VIN=H L 4.04 4.09 4.14 V Overcharge sensing hysteresis VOCH=VOC-VOCR VOCH 120 mV Overdischarge detection voltage VODC1 VCC=VIN=H L 2.20 2.30 2.40 V Overdischarge release voltage VODR VCC=VIN=L H 2.78 2.90 3.02 V Overcurrent detection threshold VCS VCS=L H 112 125 138 mV Overcurrent short-circuit detection VCSS 0.35 0.45 0.55 V Overcurrent release conditions Load open : Load of 5MΩor greater across battery pack terminals Consumption current 1 (Normal mode) (IS1=ICC+IIN) IS1 VCC=VIN=3.5V 10.0 14.0 µA Consumption current 2 (Overdischarge mode) IS2 VCC=VIN=1.9V 0.7 1.0 µA Absolute Maximun Ratings (Ta=25°C) Item Symbol Ratings Units Storage temperature TSTG -40~+125 Operating temperature TOPR -20~+70 Power supply voltage VCC max. -0.3~+18 V OC pin voltage VOC max. CS pin voltage VCS max. -0.6~VCC V Allowable loss Pd 300 mW OC Overcharge detection output pin On overcharge, an external transistor is driven to turn off the charge-control FET (N-ch) N.C TD Overcharge detection dead time setting pin VCC Positive power supply voltage pin VIN Voltage detection pin for battery connected between VIN and GND Notes : Overcharge mode : Battery voltage > overcharge detection voltage Normal mode : Overdischarge detection voltage < battery voltage < overcharge detection voltage, discharge current < overcurrent detection level Overdischarge mode : Overdischarge detection voltage > battery voltage Overcurrent mode : Discharge current > overdischarge detection level=CS-GND voltage > discharge current turn-on resistance (discharge-control FET)

Protection of Lithium Ion Batteries (one cell) MM1301 Timing Chart Overcharge cutoff voltage Overcharge expulsion voltage Overdischarge expulsion voltage Overdischarge cutoff voltage removing load Cell voltage TD FET gate (charge control) FET gate (discharge control) Normal mode Normal mode Normal mode Overcurrent Overcharge mode *1: The overcurrent short mode delay time (overcurrent delay time 2) is the response time of the IC itself. In actual use, the time required for discharge of the gate capacitance of the discharge-controlling FET is added to this. When excessive currents cause considerable voltage fluctuation, the bias current within the IC may be temporarily turned off, so that the response time is lengthened. The time constant of the capacitance and resistance connected to the power supply pin should be set to at least 100µS/V, to limit power supply fluctuations. *2: Use the following formula to calculate the overcharge detection time: overcharge detection dead time tOC = 12.2 CTD [S] [where CTD is the external capacitance in µF] Overcurrent detection delay time 1 tCS1 5.0 10.0 15.0 mS Overcurrent detection delay time 2 tCS2 100 µS Overdischarge detection delay time tOD 5.0 10.0 15.0 mS Overcharge detection delay time tOC CTD=0.082µF *2 0.5 1.0 1.5 S OC pin output current IOC VCC=VIN=4.5V -30 µA GD pin "H" Output voltage VGDH VCC=VIN=3.5V VCC VCC V (Normal mode) -0.3 -0.1 GD pin "L" Output voltage VGDL1 VCC=VIN=3.5V (Overcurrent mode) VCS=0.5V 0.1 0.3 V GD pin "L" Output voltage (Overdischarge mode) VGDL2 VCC=VIN=1.5V 0.2 0.4 V

Protection of Lithium Ion Batteries (one cell) MM1301 Characteristics 1.0 2.0 3.0 4.0 5.0 ICC IIN Power supply voltage (ICC, VIN) (V) Power supply current (ICC, IIN) (µA) 0.1 0.01 0.001 0.01 0.1 External capacitance (CTD) (µF) Overcharge detection time (S) Power supply current vs power supply voltage Overcharge detection time Application circuits