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Protection of Lithium Ion Battery (three cells in series) MM1309
Protection of Lithium Ion Batteries (three cells in series)
Monolithic IC MM1309

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 These functions comprise a protection circuit, with few external parts, for lithium ion batteries.
Features
8. Charge prohibit voltage (Ta=-20°C~+70°C) 10.Charge prohibit detection function operation voltage 13.Excess discharge detection hysteresis voltage *The box represents the rank resulting from the combination of protection functions.
Applications
Protection of Lithium Ion Battery (three cells in series) MM1309
Pin Assignment
Pin Description
Function
Output FET drive pin for excess discharge control Output FET drive pin for overcharge control Negative connection pin for the low side battery. Also, IC GND pin. Positive connection pin for the low side battery, and negative connection pin for the Positive connection pin for the middle side battery, and negative connection pin for Positive connection pin for the high side battery.
Timing Chart
Protection of Lithium Ion Battery (three cells in series) MM1309
Block Diagram
Absolute Maximum Ratings (Ta=25°C)
Storage temperature
Operating temperature
Charging voltage
Power supply voltage
OV2 pin applied voltage
Allowable power dissipation
Protection of Lithium Ion Battery (three cells in series) MM1309
Electrical Characteristics (Unless otherwise specified Ta=25°C, VIN=15V, VCELL=VBATH=VBATM=VBATL)
Measurement Conditions
Typ. Max. Units
Current consumption (VCC pin) 1
Current consumption (VCC pin) 2
Current consumption (VCC pin) 3
Current consumption (VCC pin) 4
Current consumption (BATH pin) 1
Current consumption (BATH pin) 2
Current consumption (BATH pin) 3
MM1309BF
Charge prohibit voltage
MM1309CF
Charge prohibit release voltage
Charge prohibit detection
MM1309BF
function operation voltage MM1309CF
Charge prohibition sensing operation
voltage Hysteresis voltage
Excess discharging
MM1309BF
detection voltage
MM1309CF
Discharge resumption
MM1309BF
MM1309CF
Excess discharge detection
hysteresis voltage
BATL pin input voltage 1
BATL pin input voltage 2
BATM pin input voltage 1
BATM pin input voltage 2
DCHG pin source voltage
DCHG sink voltage
DCHG output voltage L
DCHG output voltage M
OV pin sink current
Application
Datasheets for electronic components.

Source: http://f4eru.free.fr/robot/Maggie/Accu/MM1309.pdf

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