MM1373 MITSUMI | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 5
Technical content
Features
- Consumption current V CEL=3.8V 3.0µA typ. 2. Consumption current V CEL=2.3V 0.3µA typ. 3. Input current between cell pins V CEL=3.8V ±0.3µA max. 4. Overcharge detection voltage A type 4.35V±50mV 5. Overcharge detection delay time C T=0.22µF 1.5S typ. 6. Detection voltage can be changed to accommodate customer needs Package SOP-8C SOP-8E
Applications
- For secondary protection of lithium ion battery packs Overcharge Detection ICs MM1373 Detection voltage Hysteresis Rank A 4.350V 250mV Rank B 4.250V 250mV Rank C 4.225V None Rank D 4.130V None Rank E 4.450V 100mV
MITSUMI Detection of Lithium Ion Battery Overcharging MM1373 Pin Assignment 14 32 85 67 SOP-8C, SOP-8E
1 OUT
3 GND
8 VCC
MITSUMI Detection of Lithium Ion Battery Overcharging MM1373 Pin Description Pin no. Pin name Function Internal equivalent circuit diagram
1 OUT Reset output pin
2 CT Delay capacitance pin
4 V1 Cell 1 power supply
5 V2 Cell 2 power supply
6 V3 Cell 3 power supply
7 V4 Cell 4 power supply
MITSUMI Detection of Lithium Ion Battery Overcharging MM1373 Absolute Maximun Ratings Recommended Operating Conditions Electrical Characteristics (Except where noted otherwise, Ta=25°C, V CEL=V4-V3=V3-V2=V2-V1=V1-GND, VCC=4 VCEL) *2: A current no greater than 100µA should be passed through pin Ct. Item Symbol Ratings Units VCC input voltage VCC V4 input voltage *1 V4 V3 input voltage *1 V3 -0.3~24 V V2 input voltage *1 V2 V1 input voltage *1 V1 CT pin voltage *2 VCT -0.3~24 V VOUT pin voltage VOUT -0.3~24 V Allowable loss Pd 300 mW Operating temperature TOPR -20~+80 °C Storage temperature TSTG -40~+125 °C Item Symbol Ratings Units Input voltage between cells 1 Vop1 2.0~4.35 V VCC input voltage Vop2 4.0~18 V Item Symbol Measurement conditions Min. Typ. Max. Units Consumption current 1 I1 VCEL=3.8V 3.0 6.0 µA Consumption current 2 I2 VCEL=2.3V 0.3 0.5 µA Pin I/O current between cells I3 VCEL=3.8V (V4, V3, V2, V1 side) ±0.0 ±0.3 µA Overcharge detection voltage V S VCEL=L H, Ta=-20~+70°C 4.30 4.35 4.40 V Hysteresis voltage HSY V CEL=L H L 0.20 0.25 0.30 V Overcharge detection delay time T PLH CT=0.22µF 1.0 1.5 2.0 S Output voltage L V OL IL=100µA 0.4 V Output leakage current I LEAK VCEL=3.8V, VOUT=24V 0.1 µA
MITSUMI Detection of Lithium Ion Battery Overcharging MM1373 Timing Chart 4.35V V1~V4 CT OUT OUT (When CT is shorted) (When CT is open) 4.10V 1.80V 0.60V 1.5S Application Circuits Note : When pin Ct is shorted or left open, the output goes low when overcharging is detected. Characteristics 23 4.10 4.35 Input voltage (No delay) (V) Output voltage (V) 0.0 -25 25 75 0.5 1.0 1.5 2.0 2.5 3.0 Temperature (°C) -1100ppm -2200ppm Delay time (S) Detection voltage Output delay time Note : By shorting each cell, two-, three- and four-cell series can be accommodated. A V4 cell should always be connected. If the V4 cell is shorted, the chip may not function correctly.