MITSMI MM1214XF Datasheet

MITSUMI

Control of Lithium Ion Battery Charging and Discharging MM1214

Control of Lithium Ion Battery Charging and Discharging

Monolithic IC MM1214

Outline

This IC controls constant current charging and excess discharge for lithium-ion batteries (sub-batteries). It
performs constant current charging, stops charging at set voltages, and prevents excess discharging. When
the voltage falls below a set level, it prohibits discharges and reduces IC current consumption nearly to zero.

Features

During charging

1. Input voltage range 4.5V~15.0V

2. Current consumption (V

IN pin) VBATT<4.1V 9mA typ.

3. Current consumption (V

CC pin) IBATC=0mA 500µA typ.

4. Charging current switching voltage 2.7V±0.1V

5. Charging current (normal conditions) 105mA typ.

6. Charging current (low voltages) 5.0mA typ.

7. Charging control voltage (Ta =

-

20~+70°C) 4.200V±0.063V

8. Overvoltage detection voltage (Ta =

-

20~+70°C) 4.335V±0.065V

9. Overvoltage reset voltage 3.50V±0.13V

10.Overvoltage detection non-induction time C

CC=2.22µF 0.80S typ.

11.Overvoltage reset non-induction time C

CC=0.22µF 0.80S typ.

During discharging

12.Current consumption (Vbat pin) I

L=10mA 450µA typ.

13.Current consumption (Vbat pin) I

L=0mA 15µA typ.

14.Current consumption (Vbat pin) discharging off, : V

BAT<2.4V 0.1µA max.

15.Excess discharging detection voltage 2.30V±0.19V

16.Discharge resumption voltage 2.70V±0.1V

17.Voltage drop between battery and output (V

BATT=3.0V, IL=

-

10mA) 70mV typ.

18.Voltage drop between battery and output (I

L=100µA, VBATT=3V) 2.92V typ.

Package

SSOP-16A (MM1214XF)

Application

For overnight charging

MITSUMI

Control of Lithium Ion Battery Charging and Discharging MM1214

Pin Assignment

1 GND 9 VO2

2 N.C 10 V

O1

3 T

CH 11 VBAT

4 CD 12 N.C

5 N.C 13 V

IN

6 N.C 14 N.C

7 N.C 15 V

CC

8 VOV 16 N.C

SSOP-16A

13 762458

16 13 1115 14 12910

Block Diagram

Absolute Maximum Ratings

Item Symbol Rating Units

Storage temperature T

STG

-

40~+125 °C

Operating temperature T

OPR

-

20~+70 °C

input voltage V

INN max. 18 V

Power supply voltage V

CC max. 18 V

Battery voltage V

BAT max. 4.4 V

VOV pin applied voltage V

VOV max. 10 V

TCH pin applied voltage V

TCH max. 10 V

Charging current I

CHG max.

-

150 mA

Output current I

BAT max.

-

30 mA

Allowable power dissipation 1 Pd1 500 mW

Allowable power dissipation 2 (Note 1)

Pd2 1000 mW

Note 1 : When mounted on glass epoxy board (10 25 0.8) Plated area 80% (Refer to Fig.1)