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Part: MM1309CF
Category:
Power Management
-> Battery Management
-> Battery Protection
Description: Protection of Lithium Ion Batteries(three Cells In)
Company: Mitsumi
Datasheet: Download MM1309CF datasheet File size : 99 kB
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MITSUMI
Protection of Lithium Ion Battery (three cells in series) MM1309
Protection of Lithium Ion Batteries (three cells in series)
Monolithic IC MM1309
Outline
This is a 3-cell series protection IC is for protecting a lithium ion battery from overcharging and excess discharging. If abnormalities occur during charging and excess voltage is applied, it has a function that turns off the external FET switch (overcharging detection). It also has a function that turns off the external FET switch when the voltage for each battery falls below a set voltage, to prevent excess discharge when discharging the battery (discharging detection). At that time, the IC is switched to low current consumption mode. These functions comprise a protection circuit, with few external parts, for lithium ion batteries. 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
Overcharge prohibition voltage (V) Overcharge detection voltage temperature conditions Overcharge detection hysteresis voltage (V) Overdischarge detection voltage (V) Discharge resumption voltage (V) Overcurrent detection voltage (mV)
Series Table
Model
Package SOP-8C, 8E MM1309 BF CF
4.350±0.050 4.250±0.050
B B
45±15 45±15
2.40±0.09 2.35±0.09
2.65±0.16 2.60±0.16
-
Features
1. 2. 3. 4. 5. 6. 7. 8. Current consumption (for VCC pin) VCELL=4.4V Current consumption (for VCC pin) VCELL=4.2V VCELL=3.8V Current consumption (for VCC pin) Current consumption (for VCC pin) VCELL=2.2V Current consumption (for BATH pin) VCELL=4.4V Current consumption (for BATH pin) VCELL=3.8V Current consumption (for BATH pin) VCELL=2.3V Charge prohibit detection function operation voltage 700µA typ. 300µA typ. 25µA typ. 0.1µA max. 12µA typ. 8µA typ. 1µA typ. B : 4.20V typ. C : 4.10V typ. 250±75mV
9. Excess discharge detection hysteresis voltage
Package
SOP-8C, SOP-8E (MM1309 F) The box represents the rank resulting from the combination of protection functions.
*
Applications
1. Notebook PCs 2. Portable terminals 3. Others
MITSUMI
Protection of Lithium Ion Battery (three cells in series) MM1309
Pin Assignment
1 2 8 7 6 5 3 4 5 1 2 3 4 6 7 SOP-8C, SOP-8E 8 DCHG N. C OV GND BATL BATM BATH VCC
Pin Description
No. 1 2 3 4 Pin DCHG N. C OV GND BATL BATM BATM VCC Input Input Input Output Non connect Output FET drive pin for overcharge control Negative connection pin for the low side battery. Also, IC ground pin. (IC reference power supply pin) Positive connection pin for the low side battery, and negative connection pin for the middle side battery. Positive connection pin for the middle side battery, and negative connection pin for the high side battery. Positive connection pin for the high side battery. IC positive power supply input pin. Function Output FET drive pin for excess discharge control
5
6 7 8
Timing Chart
Overcharge Excess discharge BATH VCELL U VCELL O VCELL D VCELL S VCELL U VCELL O VCELL D VCELL S VCELL U VCELL O VCELL D VCELL S H L Normal Unbalanced (large voltage differences) Normal Overcharge Excess discharge Excess discharge Normal Normal Overcharge
BATM
BATL
VALM
- VALM
DCHG
OV
L
High Impedance
High Impedance
High Impedance
MITSUMI
Protection of Lithium Ion Battery (three cells in series) MM1309
Block Diagram
Output Pin Conditions
Pin
Voltage Excess discharge Normal Overcharging prohibited status 4.35V/CELL 2.4V/CELL
H L
DCHG OV
High Impedance
L
Absolute Maximum Ratings
Item Storage temperature Operating temperature Charging voltage Power supply voltage OV2 pin applied voltage Allowable power dissipation Symbol TSTG TOPR VBAT max. VCC max. VO max. Pd Rating -40~+125 -20~+70 15 15 18 300 Units °C °C V V V mW
Others parts begin by mm
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