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MM1412 Dataheets PDF



Part Number MM1412
Manufacturers Mitsumishi
Logo Mitsumishi
Description Protection of Lithium Ion Battery
Datasheet MM1412 DatasheetMM1412 Datasheet (PDF)

www.DataSheet4U.com MITSUMI Protection of Lithium-Ion Batteries MM1412 Protection of Lithium-Ion Batteries Monolithic IC MM1412 Outline This IC protects lithium ion batteries in the event of overcharge, overdischarge and overcurrent. It has the following two functions: an overcurrent detection function that turns the external FET-SW off when a problem occurs during charging, etc. and excess voltage is impressed on each battery for longer than a certain time, and an overdischarge detection fu.

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www.DataSheet4U.com MITSUMI Protection of Lithium-Ion Batteries MM1412 Protection of Lithium-Ion Batteries Monolithic IC MM1412 Outline This IC protects lithium ion batteries in the event of overcharge, overdischarge and overcurrent. It has the following two functions: an overcurrent detection function that turns the external FET-SW off when a problem occurs during charging, etc. and excess voltage is impressed on each battery for longer than a certain time, and an overdischarge detection function that turns the external FET-SW off when battery voltage drops below a certain voltage during discharge, in order to prevent battery overdischarge. When these functions operate, the IC is put into low consumption current mode. It also has an overcurrent detection function that turns the FET-SW off when excess current flows due to a short or the like. Temperature conditions A: Ta=-25 ~ 75°C, B: Ta=-20 ~ 70°C, C: Ta=0 ~ 50°C, D: Ta=0 ~ 40°C, E: Ta=-20 ~ 25°C Series Table Model Overcharge Overdischarge Overdischarge Overcurrent Overcharge Overcharge detection voltage detection detection reset detection detection hysteresis temperature SOP-8C, E VSOP-8A voltage (V) voltage (V) voltage (V) voltage (mV) voltage (V) conditions AW 4.350±0.025 C 220±50 2.3±0.1 3.5±0.2 150±15 Package CW EF EW FW GW JW HW KW LW MW NW PW 4.295±0.025 4.250±0.025 4.250±0.025 4.300±0.025 4.225±0.025 C C C C C 300±50 220±50 220±50 2.3±0.1 2.3±0.1 2.0±0.1 2.0±0.1 2.3±0.1 3.5±0.2 3.5±0.2 3.1±0.2 3.1±0.2 3.5±0.2 3.5±0.2 3.5±0.2 3.1±0.2 3.1±0.2 3.1±0.2 150±15 150±15 150±15 140±15 150±15 150±15 100±15 150±15 100±15 100±15 75±15 MM1412 www.DataSheet4U.com 4.250±0.025 C 150±50 4.5±0.2 4.350±0.025 4.125±0.025 4.125±0.025 4.190±0.025 4.300±0.025 C C C C C 220±50 220±50 2.3±0.1 2.3±0.1 2.0±0.1 2.0±0.1 2.0±0.1 Features 1. Consumption current (during overcharge) VCELL = 4.5 ROC = 270 kΩ 2. Consumption current (normal) VCELL = 3.5V 3. Consumption current (during overdischarge) VCELL = 1.9V 4. Consumption current (during overdischarge) VCELL = 1.0V 5. Overcharge detection voltage (Ta = 0°C ~ 50°C) 6. Hysteresis voltage 7. Overdischarge detection voltage 8. Overdischarge release voltage 9. Overcurrent detection threshold 10. Reset after overcurrent detection 11. Operating limit voltage 150µA typ. 15µA typ. 0.5µA typ. 0.1µA max. 435 ± 25mV (detected for each cell) 220mV ± 50mV (detected for each cell) 2.30 ± 0.1V (detected for each cell) 3.50V ± 0.2V (detected for each cell) 150mV ± 15mV Load open 0.9V max. Package VSOP-8A SOP-8C SOP-8E www.DataSheet4U www.DataSheet4U.com 4U.com www.DataSheet4U.com MITSUMI Protection of Lithium-Ion Batteries MM1412 Applications 1. Cell phone 2. Movie Pin Assignment 1 2 8 7 6 5 3 4 1 2 3 4 5 6 VSOP-8A 7 8 OC GD CS GND TD VL VCC VH Block Diagram www.DataSheet4U.com www.DataSheet4U www.DataSheet4U.com 4U.com www.DataSheet4U.com MITSUMI Protection of Lithium-Ion Batteries MM1412 Pin Description Pin No. Pin name Overcharge detection output pin 1 OC PNPTR open collector output Overcharge mode: ON Normal mode, overdischarge mode, overcurrent mode: OFF Discharge control FET (N-ch) control output pin 2 GD Normal mod, overcharge mode: H Overdischarge mode, overcurrent mode: L Overcurrent detection input pin 3 CS Monitors discharge current equivalently by the voltage drop between discharge control FET source and drain. Stops discharge when voltage between CS pin and GND pin goes above overcurrent detection threshold value, and holds until load is released. 4 5 GND TD VL VCC VH Ground pin, or lower cell load negative pole input pin. Overcharge detection dead time setting pin Dead time can be set by adding a capacitor between TD and GND pins. Battery intermediate potential input pin Connection pin for lower cell positive electrode side and upper cell negative electrode side. Power supply input pin Functions 6 7 8 Note: Mode Descriptions (1) Overcharge mode Either H cell or L cell battery voltage exceeds overcharge detection voltage. Overcharge detection operation delay can be set by the dead time setting pin. (2) Normal mode Both H and L cell battery voltages exceed overdischarge detection voltage and are less than overcharge detection voltage. (3) Overdischarge mode Either H or L cell battery voltage is less than overdischarge detection voltage. Overdischarge detection dead time is set internally. Overdischarge mode is released when charging causes voltage to rise above overdischarge detection voltage. Also, when battery voltage goes above overdischarge release voltage, it resets without charging, but the value is set high. (This function is included in case charging can not be detected. Also, this release voltage has a temperature coefficient of -6mV/°C.) (4) Overcurrent mode Voltage between CS and GND exceeds overcurrent detection voltage during discharge. www.DataSheet4U.com Upper cell positive electrode input pin www.DataSheet4U www.DataSheet4U.com 4U.com www.DataSheet4U.com MITSUMI Protection of Lithium-Ion.


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