mm1414 Mitsumi Electronics, Corp., mm1414 Datasheet

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mm1414

Manufacturer Part Number
mm1414
Description
Protection For Lithium-ion Batteries
Manufacturer
Mitsumi Electronics, Corp.
Datasheet

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MITSUMI
MITSUMI
Outline
Series Table
Features
Package
Applications
This IC protects lithium-ion batteries in the event of overcharge, overdischarge and overcurrent. It has the
following two functions: an overcharge detection function that turns the external FET-SW off when a problem
occurs during charging, etc. and excess voltage is impressed on each battery for longer than a certain time,
and an overdischarge detection function that turns the external FET-SW off when battery voltage drops below
a certain voltage during discharge, in order to prevent battery overdischarge. When these functions operate,
the IC enters low current consumption mode. It also has an overcurrent detection function that turns the FET-
SW off when excess current flows due to a short or the like. Since the functions above are provided, the
protection circuitry for lithium-ion batteries can be comprised with fever external components.
1. Consumption current (during overcharge)
2. Consumption current (normal)
3. Consumption current (during overdischarge)
4. Consumption current (during overdischarge)
5. Overcurrent release conditions
TSOP-20A
Lithium-ion battery packs for note PCs
MM1414
Model
Protection for Lithium-Ion Batteries (3-/4-serial cells)
Monolithic IC MM1414
TSOP-20A
Package
DV
GV
AV
CV
FV
Temperature conditions A: Ta=-25 ~ 75°C, B: Ta=-20 ~ 70°C, C: Ta=0 ~ 50°C,
4.350±0.025
4.350±0.025
4.250±0.025
4.325±0.025
4.295±0.025
Overcharge
voltage (V)
detection
detection voltage
temperature
Overcharge
conditions
C
C
C
C
C
D: Ta=0 ~ 40°C, E: Ta=-20 ~ 25°C
Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414
V
V
V
V
A, C, D, G; Load open 500kΩ or more
F; Load open 1MEGΩ or more
CELL
CELL
CELL
CELL
= 4.4 CON = 0V
= 3.5V CON = 0V
= 1.9V CON = 0V
= 1.0V CON = V
Overcharge
voltage (V)
hysteresis
detection
200±60
200±60
200±60
200±60
8±8
Overdischarge
voltage (V)
2.00±0.10
2.30±0.10
2.30±0.10
2.30±0.10
2.30±0.10
detection
CC
55µA typ.
15µA typ.
0.5µA typ.
0.1µA max.
Overdischarge
resumption
voltage (V)
3.00±0.15
3.00±0.15
3.00±0.15
3.00±0.15
3.00±0.15
April 14, 1999
voltage (mV)
Overcurrent
detection
150±15
150±15
150±15
100±15
150±15

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mm1414 Summary of contents

Page 1

... Consumption current (normal) 3. Consumption current (during overdischarge) 4. Consumption current (during overdischarge) 5. Overcurrent release conditions Package TSOP-20A Applications Lithium-ion battery packs for note PCs Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 D: Ta=0 ~ 40°C, E: Ta=-20 ~ 25°C Overcharge Overcharge detection voltage detection temperature hysteresis ...

Page 2

... MITSUMI MITSUMI Pin Assignment TSOP-20A Block Diagram Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 N.C 4 DCHG 5 N CDC 7 COL 8 COV 9 GND 10 SEL 11 N.C 12 CON ...

Page 3

... V3 cell high side voltage and V4 cell low side voltage input pin 17 V4 Input V4 cell high side voltage input pin 18 N Input Power supply input pin 20 CC Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 Functions SEL pin = GND: 3 cell (Connect V1 to GND) SEL pin = cell CC ...

Page 4

... MITSUMI Pin Description Pin Equivalent circuit diagram DCHG 7 ; CDC 8 ; COL Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 Pin Equivalent circuit diagram 9 ; COV 11 ; SEL 13 ; CON ...

Page 5

... Power supply voltage OV pin impressed voltage SEL pin impressed voltage CON pin impressed voltage Allowable loss Recommended Operating Conditions Item Operating temperature Operating voltage Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 Pin Equivalent circuit diagram Symbol Ratings T -40~+125 STG ...

Page 6

... OV pin sink current OV pin leak current CON pin L voltage CON pin H voltage CON pin current SEL pin L voltage SEL pin H voltage SEL pin current Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 (Except where noted otherwise, Ta=25° =3.5V, CON=GND, SEL=V CEL Symbol Measurement conditions I ...

Page 7

... MITSUMI MITSUMI Measuring Circuit Timing Chart For overcharge Overcharge detection voltage Cell voltage COV pin OV pin (for pull up) Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 Charge OFF Sensing dead Normal state Overcharge Overcharge release voltage Normal state ...

Page 8

... CON pin CDC pin DCHG pin Normal state External control For overcurrent CS pin COL pin DCHG pin Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 Discharge OFF Charge start Sensing dead Normal state Overdischarge Normal state Normal state Overcurrent Load release ...

Page 9

... Overcurrent Sensing Dead Time 2 100 100 1000 COL pin capacitance (pF) Note: The above characteristics are representative values only, and are not guaranteed. Protection for Lithium-Ion Batteries (3-/4-serial cells) MM1414 Overcurrent Sensing Dead Time 1, Overcurrent Reset Dead Time 3 100 0.1 1 10000 10 1 100 ...

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