MITSUMI MM1210

Remaining Battery Power Display MM1210
MITSUMI
Remaining Battery Power Display
Monolithic IC MM1210 Series
Outline
This IC detects battery voltage and displays the remaining power in the battery using an LCD. Long life and
light weight are emphasized in the most recent portable equipment, which increasingly use nickel cadmium
and nickel hydrogen batteries. For these batteries, the discharge characteristics mean that extremely precise
detection of the remaining battery power is required.
This IC enables detection of this type through high precision voltage detection.
Features
1. Two built-in detection voltages
2. High precision detection voltages
3. Low current consumption
1.18V / 1.06V typ.
±1% typ.
During detection ; 15 µA typ.
During waiting ; 15 µA typ.
4. Setting possible during non-induction
It is possible to set a time period for which detection is ignored, as for example when voltage drops due to
temporary heavy loads.
5. Ripple absorption pins
It is possible to check fluctuations in detection through continuous rippling.
6. Built-in hysteresis voltage
Package
SOP-8D (MM1210XF)
Absolute Maximum Ratings
Item
Rating
Storage temperature
-40~+125°C
Operating temperature
-20~+70°C
Input voltage
5V
Output pin voltage
5V
Allowable loss
300mW
Remaining Battery Power Display MM1210
MITSUMI
Electrical Characteristics
(Unless otherwise specified Ta=25°C, VCC=1.5V, VCE=VCC)
Item
Symbol
Measurement Conditions
Current consumption
ICC1
VCC=1.5V
15
25
µA
Current consumption during waiting
ICC2
VCC=1.3V, VCE=0.3V
1.5
2.5
µA
Detection voltage I
VTH1
VCC=H L
1.169 1.180 1.191
V
Detection voltage II
VTH2
VCC=H L
1.050 1.060 1.070
V
Detection voltage Difference
VT
VT=VTH1-VTH2
Min. Typ. Max. Unit
100
120
140
±200
Detection voltage temperature factor
10
20
mV
PPM/°C
Hysteresis voltage
VHYS
35
mV
Output sink current I
IS1
VCC=1.3V, VO1=0.3V
40
µA
Output sink current II
IS2
VCC=1.3V, V02=0.3V
40
µA
Output saturation voltage I
VO1
ISINK=30UA
150
250
mV
Output saturation voltage II
VO2
ISINK=30UA
150
250
mV
Output leak voltage I
ILE1
VCC=1.0V, VO1=0.5V
1
µA
Output leak voltage II
ILE2
VCC=1.0V, VO2=1.5V
1
µA
Power supply voltage operating limit
VOPL
VCC=variable, VO < 0.4V
0.70
0.75
V
-0.3
VCC
0.3
V
100
300
500
nA
-0.3
0
0.3
V
Input H voltage
VCEH
Input L current
ICEH
Input L voltage
VCEL
Threshold value I
VTHT
VCC=1.0V, VTC=variable
0.34
0.42
0.50
V
Threshold value II
VTHT
VCC=1.0V, VTC=variable
0.04
0.12
0.20
V
Discharge current
IDIS
VCC=1.0V, VTC=0.5V
30
60
90
nA
Charge current
ICHA
VCC=1.5V, VTC=0.5V
0.40
0.80
1.20
µA
Non-induction time
td
VCC=1.5V, C=0.033UF
120
180
240
mS
L transmission delay time
tdLH
VCC=L
1.0
2.0
4.0
mS
Ripple absorption resistance
RRIP
70
100
130
kΩ
CE pin
TC pin
Note : VCC applied pulse conditions
VCC=1.5V, VCE=0V
H, C=0.033UF
measure resistance between pins 8-6
VCC applied pulse
GND
td1
1.25V
1.10V
td2
1.15V
1.00V
Remaining Battery Power Display MM1210
MITSUMI
Timing Chart
hysteresis
1.20V
VS1 1.18V
1.08V
VS2 1.06V
hysteresis
VCC
GND
0.75V
0.40V
0.05V
CE pin
TC pin
threshold 1
threshold 2
H
ROUT1
ROUT2
tD1
L
H
tDLH
tD2
L
tDLH
is calculated by the following formula :
*Delay time
tD1=tD2 (S)=C (F) (5.4 10 )
6
T
4
tDLH (S)=CT (F) (6.3 10 )
CT, TC pin connection capacitance
Block Diagram, Example of Application Circuit
Output
VCC
1.18
1.06
ROUT 1
L
H
H
LED 2
L
L
H
CE pin
H
Operation
L
Waiting
Note 1 : Please connect the CE pin
to VCC when not using.
Note 2 : The Adj terminal is used in
the product inspection
process, so please do not
connect it to other wiring.
Capacitance of external capacitor for non-induction time
101
1S 100
100mS 10-1
10mS 10-2
1mS 10-3
0.1mS 10-4
0.01mS 10-5
10-10
10-8
10-9
100PF 1000PF 0.01UF
10-7
0.1UF
10-6
1UF
Remaining Battery Power Display MM1210
MITSUMI
Characteristics
Detection voltage 1
Temperature characteristics
(mV)
Detection voltage 2
Temperature characteristics
1188
(mV) 1068
1184
1064
1180
1060
1176
1056
1172
1052
-10
10
30
50
70
-10
Hysteresis voltage 1
Temperature characteristics
(mV) 27
24
24
21
21
18
18
15
15
12
10
30
50
70
50
70
50
70
Hysteresis voltage 2
Temperature characteristics
(mV) 27
-10
30
Temperature
Temperature
12
10
50
70
-10
10
30
Temperature
Temperature
Output sink current 1
Temperature characteristics
Output saturation voltage 1
Temperature characteristics
(mV) 280
(mV) 90
240
80
200
70
60
160
50
120
40
-10
10
30
Temperature
50
70
-10
10
30
Temperature