MITSUMI MM1214

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
2. Current consumption (VIN pin)
3. Current consumption (VCC pin)
4. Charging current switching voltage
5. Charging current (normal conditions)
6. Charging current (low voltages)
7. Charging control voltage (Ta =-20~+70°C)
8. Overvoltage detection voltage (Ta =-20~+70°C)
9. Overvoltage reset voltage
10.Overvoltage detection non-induction time
11.Overvoltage reset non-induction time
VBATT<4.1V
IBATC=0mA
CCC=2.22µF
CCC=0.22µF
During discharging
12.Current consumption (Vbat pin)
IL=10mA
13.Current consumption (Vbat pin)
IL=0mA
14.Current consumption (Vbat pin) discharging off,
: VBAT<2.4V
15.Excess discharging detection voltage
16.Discharge resumption voltage
17.Voltage drop between battery and output (VBATT=3.0V, IL=-10mA)
18.Voltage drop between battery and output (IL=100µA, VBATT=3V)
Package
SSOP-16A (MM1214XF)
Application
For overnight charging
4.5V~15.0V
9mA typ.
500µA typ.
2.7V±0.1V
105mA typ.
5.0mA typ.
4.200V±0.063V
4.335V±0.065V
3.50V±0.13V
0.80S typ.
0.80S typ.
450µA typ.
15µA typ.
0.1µA max.
2.30V±0.19V
2.70V±0.1V
70mV typ.
2.92V typ.
Control of Lithium Ion Battery Charging and Discharging MM1214
MITSUMI
Pin Assignment
16 15 14 13 12 11 10 9
1 2 3 4 5 6 7 8
SSOP-16A
1
GND
9
VO2
2
N.C
10
VO1
3
TCH
11
VBAT
4
CD
12
N.C
5
N.C
13
VIN
6
N.C
14
N.C
7
N.C
15
VCC
8
VOV
16
N.C
Block Diagram
Absolute Maximum Ratings
Item
Storage temperature
Operating temperature
input voltage
Power supply voltage
Battery voltage
VOV pin applied voltage
TCH pin applied voltage
Charging current
Output current
Allowable power dissipation 1
Allowable power dissipation 2 (Note 1)
Symbol
TSTG
TOPR
VINN max.
VCC max.
VBAT max.
VVOV max.
VTCH max.
ICHG max.
IBAT max.
Pd1
Pd2
Note 1 : When mounted on glass epoxy board (10
Rating
-40~+125
-20~+70
18
18
4.4
10
10
-150
-30
500
1000
25
Units
°C
°C
V
V
V
V
V
mA
mA
mW
mW
0.8) Plated area 80% (Refer to Fig.1)
Control of Lithium Ion Battery Charging and Discharging MM1214
MITSUMI
Electrical Characteristics
(Unless otherwise specified Ta=25°C, VCC, VIN=6.5V)
Item
Symbol
Measurement Conditions
Charging input operation range 1
VINOPR1
During low-current charging (Note 2)
4.50
(15.0)
V
Charging input operation range 2
VINOPR2
During rapid charge
4.50
5.5
V
Power supply input operation range
VCCOPR
Charging OFF
4.50
15.0
V
Current consumption (VIN pin)
IIN
VBAT < 4.1V
9
12
mA
Current consumption (VCC pin)
ICC
IBATC=0mA
500
750
µA
Current consumption (VBAT pin) 1
IBAT1
IL=10mA, VCC=0V, VBATT=3V
450
550
µA
Current consumption (VBAT pin) 2
IBAT2
IL=0mA, VCC=0V, VBATT=3V
15
30
µA
Current consumption (VBAT pin) 3
IBAT3
VBAT < 2.4V (Discharging OFF), VCC=0V
0.1
µA
Charge control voltage
VBATC
Ta=-20~+70°C
4.137
4.200
4.263
V
Overcharge detection voltage
VBATU
Ta=-20~+70°C
4.270
4.335
4.400
V
Overcharge reset voltage
VBATO
3.37
3.50
3.63
V
100
135
Detection voltage margin 1
Charge current conversion voltage
Charge hysteresis voltage
VUC
VCH
VCH
VBATT=4.5V
3.0V
VBATU-VBATC, Ta=-20~+70°C
Min. Typ. Max. Units
mV
VBATT=2.0V
3.0V
2.60
2.70
2.80
V
VBATT=3.0V
2.0V
300
400
500
mV
Charge current (During low voltage)
ITCH
VBATT < VCH- VCH
-6.5
-5.0
-3.5
mA
Charge current (Normal)
IBATC1
4.0V > VBAT > VCH
-115 -105
-95
mA
Charge current 1 (Normal)
IBAT1CT
Ta=-20~+70°C, VIN=4.5V~5.5V
-120 -105
-90
mA
Charge current 2 (Normal)
IBAT2CT
Ta=-20~+70°C, VIN=4.5V~6.5V
-125 -105
-90
mA
Charge with constant current mode OFF
IBATC2
VBAT=4.0V
-115
-80
mA
Excess discharging detection voltage
VBATS
Discharge resumption voltage
VBATD
VCC > 4.5V
Voltage drop between battery and output
VCE
VBAT=3.0V, IL=10mA
VOV pin sink current
ISIVOV
VBATT=4.4V, VVOV=0.4V
VOV pin leak current
ILVOV
VBAT=4.0V
VOV pin output voltage
VVOV
IVOV=1mA
TCH pin sink current
ISITCH
VBAT=2.0V, VTCH=0.4V
TCH pin leak current
ILTCH
VBAT=3.0V
TCH pin output voltage
VTCH
ITCH=1mA
0.25
CD pin charge current
ICDC
CD pin discharge current
VBATT=3.0V
2.0V
2.11
2.30
2.49
V
2.60
2.70
2.80
V
70
100
mV
1.00
4.00
0.25
1.00
mA
0.1
µA
0.35
V
4.00
mA
0.1
µA
0.35
V
VCD=1.5V, VBAT=4.4V
-800 -600 -400
nA
ICDDC
VCD=1.5V, VBAT=3.0V
500
680
860
nA
CD pin H voltage
VCDH
VBATT=4.5V
2.65
2.90
3.15
V
CD pin threshold voltage 1
VTHC1
VCD=3V
0V
0.65
0.73
0.91
V
CD pin threshold voltage 2
VTHC2
VCD=0V
3V
2.00
2.35
2.70
V
Overvoltage detection non-induction time
tDCD1
CCD=0.22µF
0.40
0.80
1.60
S
Overvoltage reset non-induction time
tDCD2
CCD=0.22µF
0.40
0.80
1.60
S
Note 2 : During rapid charging, use 5.5 V Vin power supply.
Note 3 : VO2 has no current supply capacity, so do not connect load.
Control of Lithium Ion Battery Charging and Discharging MM1214
MITSUMI
Charcteristics
PD
[mW]
When mounted on glass epoxy base (10
1200
Prated area 80%
1000
800
600
SSOP-16A
400
200
25
50
70
TEMP [°C]
Fig.1
Application Circuits
100
125
25
0.8 [mm])