MM1451 MITSUBISHI | Alldatasheet
Document overview
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- PDF pages: 7
Technical content
Features
- Overcharge detection voltage accuracy (0°C to 50°C) ±50 mV/cell. 2. Consumption current (Vcell=3.8V) 3µA typ. 3. Consumption current (Vcell=2.3V) 0.3µA typ. 4. Pin I/O current between cells (Vcell=3.8V) 0.3µA max. 5. Delay time on overcharge voltage detection (Ct=0.22µF) 1.5S typ. 6. Output current (Vcell=V CC=4.5 V) 500µA typ. Package VSOP-8B
Applications
IC for double-protection of lithium-ion batteries with one to three cells. 14 32 85 67 VSOP-8B MITSUMI 1 V3 2 V2 3 V1
4 GND
6 N.C
7 OUT
8 VCC
MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) MM1451MITSUMI Block Diagram
MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) MM1451 Pin Description Pin No. Pin name Functions Equivalent circuit diagram
1 V3 3-cell power supply
2 V2 2-cell power supply
3 V1 1-cell power supply
5 Ct Delay capacity pin
7 OUT OUT pin
MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) MM1451 Absolute Maximun Ratings (Ta=25°C) Electrical Characteristics 1 (Except where noted otherwise, Ta=25°C, V CEL=V3-V2=V2-V1=V1-GND, VCC=3 VCEL) Electrical Characteristics 2 (Except where noted otherwise, Ta=25°C, V CEL=V3-V2=V2-V1=V1-GND, VCC=3 VCEL) Item Symbol Ratings Unit Operating temparature TOPR -20~+80 °C Storage temparature TSTG -40~+125 °C VCC Input voltage VCC V1 Input voltage *1 V1 -0.3~18 V V2 Input voltage *1 V2 V3 Input voltage *1 V3 Ct pin voltage *2 VCT -0.3~18 V VOUT pin voltage VOUT -0.3~18 V Allowable loss Pd 170 mW Note 2 : *2 Do not impress current of 300µA or more on the Ct pin. Item Symbol Measurement conditions Min. Typ. Max. Unit Current consumption 1 I1 VCEL=3.8V 3.0 6.0 µA Current consumption 2 I2 VCEL=2.3V 0.3 0.5 µA Pin I/O current between cells I3 VCEL=3.8V (between V3, V2, V1) ±0.0 ±0.3 µA Overcharge detection voltage VS VCEL=L H Ta=-20~+70°C 4.400 4.450 4.500 V Hysterisis voltage Hys V CEL=L H L 35 50 65 mV Overcharge detection delay time TPLH Ct=0.22µF 1.0 1.5 2.0 S Output current IOH VCEL=VCC=4.5V VO=3V 100 500 µA Item Symbol Measurement conditions Min. Typ. Max. Unit Current consumption 1 I1 VCEL=3.8V, VCC=VCEL 3 3.0 6.0 µA Current consumption 2 I2 VCEL=2.3V, VCC=VCEL 3 0.3 0.5 µA Pin I/O current between cells I3 VCEL=3.8V (between V3, V2, V1) ±0.0 ±0.3 µA Overcharge detection voltage VS VCEL=L H Ta=-20~+70°C 4.400 4.450 4.500 V Hysterisis voltage Hys V CEL=L H L 35 50 65 mV Overcharge detection delay time TPLH Ct=0.22µF 1.0 1.5 2.0 S Output current IOH VCEL=VCC=4.6V VO=3V 100 500 µA Output leakage current ILEAK VCEL=3.8V, VCC=18V 0.1 µA
MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) MM1451MITSUMI Electrical Characteristics 3 (Except where noted otherwise, Ta=25°C, V CEL=V3-V2=V2-V1=V1-GND, VCC=3 VCEL ) Item Symbol Measurement conditions Min. Typ. Max. Unit Current consumption 1 I1 VCEL=3.8V, VCC=VCEL 3 2.5 3.5 µA Current consumption 2 I2 VCEL=3.8V, VCC=VCEL 3 1.5 2.5 µA Current consumption 3 I3 VCEL=2.3V, VCC=VCEL 3 0.15 0.3 µA Current consumption 4 I4 VCEL=2.3V, VCC=VCEL 3 0.1 0.2 µA Pin I/O current between cells I3 VCEL=3.8V (between V3, V2, V1) ±0.0 ±0.3 µA Overcharge detection voltage VS VCEL=L H Ta=-20~+70°C 4.400 4.450 4.500 V Hysterisis voltage Hys V CEL=L H L 35 50 65 mV Overcharge detection delay time TPLH Ct=0.22µF 1.0 1.5 2.0 S Output current IOH VCEL=VCC=4.6V VO=3V 100 500 µA Output leakage current ILEAK VCEL=3.8V, VCC=18V 0.1 µA Measuring Circuit
MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) MM1451MITSUMI Timing Chart 4.45V 4.40V 1.5S 1.8V 0.6V OUT (at Ct short) (at Ct open) OUT Ct V1~V3 Application Circuit Delay time Td(S) = 7 CCt (µF) Note 1: Can support 1, 2 or 3 cells by shorting each cell. However, be sure to connect a battery for V3 cell. V3 cell may not operate correctly when shorted. Note 2: When connecting batteries, be sure to connect in the following order: GND V3, and VCC V1OR V2. Note 3: Output may go ON momentarily when starting up power supply. If this error output during startup becomes a problem, connect the VCC pin last. Note 4: Operation can not be guaranteed for connections other than the above. Note: Output goes low simultaneously with overcharge detection at Ct pin short and open.
MITSUMI Protection of Lithium-Ion Batteries (for Double-Protect) MM1451 Characteristics Input voltage (No delay) (V) 0 0123 4.400 4.450 Output voltage (V) Temperature (°C) 2.5 3.0 2.0 1.5 1.0 0.5 0.0 -25 25 75 2200p pm2200ppm -500p pm-500ppm Delay time (S) Detection voltage Output delay time Cell voltage (V) Consumption current (µA) Consumption current Cell voltage (V) 0.2 0.3 0.1 -0.1 -0.2 Pin I/O current between cells (µA) Pin I/O current between cells