Datasheet MM1433 Datasheet (MITSMI)

MITSUMI

TSOP-24A

136924587101211

24 20 1723 21 19 18 1622 131415

MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

IC for Control of Lithium-ion Batteries Charging

Monolithic IC MM1433

Outline

This IC is used to control charging of lithium-ion batteries. This one IC incorporates functions for constant­current and constant-voltage charging and for precharging, for an overcharge timer, battery temperature
detection, and other protective functions. It was developed by adding to the previous MM1332 and 1333 the
above-described functions.

Features

1. Charging voltage accuracy ±30mV/cell.

2. Consumption current 5mA typ.

3. Precharge function.

4. Recharge function.

5. Overcharge timer.

6. Battery temperature detection function.

7. We can supply type for one and two cells.

Package

TSOP-24A

Applications

IC for control of lithium-ion batteries charging.

Pin Assignment

1 CHGSW 13 BAT1

2 RESET 14 BAT2

3 TP1 15 CS

4 TP2 16 CFB

5 VREF 17 CNT

6 GND1 18 V

7 GND2 19 ADJ5

8 ADJ1 20 V

9 ADJ2 21 LED G

CC

OUT

10 ADJ3 22 LED R

11 ADJ4 23 OSC OUT

12 TDET 24 OSC FB

-

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MITSUMI

Block Diagram

IC for Control of Lithium-ion Batteries Charging MM1433

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Pin Description

IC for Control of Lithium-ion Batteries Charging MM1433

Pin No.

Pin name

1 CHGSW Input L: Forced charging circuit ON (OFF for reset)

2 RESET Input L: Forced charging circuit ON (start)

3 TP1

4 TP2

5 VREF Output Outputs 1.2V typ. reference voltage. Used for temperature detection reference

I/O Functions

Forced charging OFF pin

H: Charging stop is forced

Logic reset pin

H: Forced charging circuit OFF

Test pin 1

Pre-charge timer test pin

Input/ Inverts while counting (the middle stage of the several FF stages) and output to

TP1, to permit monitoring.Output

Also, TP1 output signal is inverted again inside the IC and inputs to the next stage

FF. (Timer setting is done by binary counter.)

Test pin 2

Input/

Full charge timer test pin

Output

Same structure as TP1

Reference power supply output pin

power supply and ADJ1 - ADJ4 adjustment.

6 GND1 Input Ground pin.

7 GND2 Input Ground pin.

8 ADJ1 Input

9 ADJ2 Input

10 ADJ3 Input

Overcurrent detection adjustment pin

Set so that overcurrent detection does not function. Pin voltage is 1.16V typ.

Full charge detection adjustment pin

Pin voltage is set at 93mV typ. Full charge detection value can be changed by

adjusting pin voltage with an external resistor, etc.

Full charge detection is done by comparing ADJ2 pin voltage and 12dB voltage

drop value between CS and BAT.

Pre-charge current adjustment pin

Pin voltage is set at 120mV typ. Pre-charge current can be changed by adjusting

pin voltage with an external resistor, etc.

Pre-charge current control is done by comparing ADJ3 pin voltage and 12dB

voltage drop value between CS and BAT.

Full charge current adjustment pin

Pin voltage is set at 0.89mV typ. Full charge current can be changed by adjusting

pin voltage with an external resistor, etc.

11 ADJ4 Input Full charge current control is done by comparing ADJ4 pin voltage and 12dB

voltage drop value between CS and BAT.

When full charge current is controlled to rated current by an adapter, short ADJ4

pin and VREF pin so that rated current control does not function in the IC.

MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Pin No.

Pin name

I/O Functions

Temperature detection input pin

Apply potential resistance divided by external resistor and thermistor from

12 TDET Input

reference voltage when using. Reset state will exist if TDET pin does not reach

the specified potential.

13 BAT1 Input Battery voltage input pins

14 BAT2 Input Detect battery voltage and control charging.

Current detection pin

15 CS Input Detects current by external resistor (between CS and BAT) voltage drop and

controls charging current.

Rated current control phase compensation pin

16 CFB Input Oscillation is improved by connecting an external capacitor (around 100pf)

between CFB and CNT for phase compensation.

Charging control output pin

17 CNT Output

Controls external PNP-Tr base for rated current rated voltage charging.

18 V

CC Input Power supply input pin

Rated voltage control adjustment pin

19 ADJ5

Input

Allows fine adjustment of rated voltage value. For example, rated voltage value

rises by around 15mV (at 4.1V typ.) when ADJ5-GND is shorted.

Overvoltage detection output pin

20 V

OUT Output For VCC overvoltage input: L

For V

CC recommended operating voltage: H

LED C control output pin

21 LED G Output

NPN-Tr open collector output. Refer to the flow chart for ON/OFF.

LED R control output pin

22 LED R Output

NPN-Tr open collector output. Refer to the flow chart for ON/OFF.

Oscillator output pin

Timer setting time changes according to oscillation frequency.

Oscillation frequency is determined by an external resistor (connected between

23

OSC OUT

Output

OSC OUT and OSC FB) and capacitor (connected between OSC FB and GND).

For example, the full charge timer setting is 4H for external resistor of 130kΩ and

capacitor of 0.01µF.

24

OSC FB-Input Oscillator inverted input pin

MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Pin Description

Pin No.

Pin name

1 CHGSW 10 ADJ3 17 CNT

2 RESET 11 ADJ4 19 ADJ5

3 TP1 12 TDET 20 V

(The values below are average values)

Equivalent circuit diagram

Pin No.

Pin name

Equivalent circuit diagram

Pin No.

Pin name

OUT

Equivalent circuit diagram

4 TP2 13 BAT1 21 LED G

5 VREF 14 BAT2 22 LED R

8 ADJ1 15 CS 23

9 ADJ2 16 CFB 24

OSC OUT

OSC FB

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MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Absolute Maximum Ratings

(Ta=25°C)

Item Symbol Ratings Unit

Storage temperature T

Operating temperature T

Power supply voltage V

CC max.

Allowable loss Pd 250 mW

Recommended Operating Conditions

Item Symbol Ratings Unit

Operating temperature T

Charging control operating voltage

Electrical Characteristics

(Except where noted otherwise, Ta=25°C, VCC=5V)

STG

OPR

OPR

-

40~+125 °C

-

20~+70 °C

-

0.3~+15 V

-

20~+70 °C

VOPR 2.7~5.9 V

Item Symbol Conditions

Consumption current I

Reference voltage V

ADP detection voltage L V

ADP detection voltage L

V

Hysteresis voltage width

ADP detection voltage H V

ADP detection voltage H

V

Hysteresis voltage width

Impedance for

ADP detection output L

BAT pin leak current I

BAT pin output voltage V

CNT pin output voltage V

CHGSW pin input current I

CHGSW pin input voltage H V

CHGSW pin input voltage L V

Measurement

Min. Typ. Max. Unit

circuit

CC 18 5.0 7.0 mA

REF 5 1.207 V

ADPL VCC : H L 20 2.35 2.45 2.55 V

ADPLW 20 50 100 150 mV

ADPH VCC : L H 20 6.1 6.3 6.5 V

ADPHW 20 50 100 150 mV

Z

ADPL 20 30 kΩ

BAT 13, 14, 15 1 µA

BAT Ta=0~+50°C 13 4.070 4.100 4.130 V

CNT ICNT=20mA 17 0.5 V

SW 1 406080µA

SWH CHGSW : OFF 1 0.6 1.20 V

SWL CHGSW : ON 1 0.25 V

RESET pin input current I

RESET pin input voltage H V

RESET pin input voltage L V

Current limit 1 V

Current limit 2 V

Full charge detection V

Low voltage detection voltage

RE 2 406080µA

REH

REL Charging control circuit: ON 2 0.25 V

L1 Quick charge 14, 15 0.20 0.22 0.24 V

L2 Pre-charge 14, 15 21 26 31 mV

F 14, 15 13 18 23 mV

Charging control circuit: OFF

2 0.6 1.20 V

VLV VBAT : L H 13 1.90 2.00 2.10 V

MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Item Symbol Conditions

Low voltage detection voltage

V

LVW 13 25 50 100 mV

Hysteresis voltage width

Pre-charge detection voltage V

P VBAT : L H 13 2.80 2.90 3.00 V

Pre-charge detection voltage

V

PW 13 25 50 100 mV

Hysteresis voltage width

Re-charge detection voltage V

Overvoltage detection voltage

Battery temperature

R VBAT : H L 13 3.85 3.90 3.95 V

VOV VBAT : L H 13 4.30 4.35 4.40 V

Low temperature 3°C

TH

V

detection voltage H ± 3°C detection

Battery temperature

TL1

V

High temperature 43°C ± 3°C

detection voltage L1 detection (charging start)

Battery temperature

TL2

V

High temperature 50°C ± 3°C

detection voltage L2 detection (during charging)

TDET input bias current I

LED R pin output voltage V

LED G pin output voltage V

T 12 30 150 nA

LEDR ILEDR=10mA 22 0.4 V

LEDG ILEDG=10mA 21 0.4 V

Measurement

circuit

Min. Typ. Max. Unit

12 0.835 0.860 0.885 V

12 0.390 0.413 0.435 V

12 0.335 0.353 0.370 V

Timer error time T

Not including external deviation

21, 22

-

10 10 %

Note 1: Current limits 1 and 2 and full charge detection are specified at current detection resistor voltage

drop.

Note 2: If the IC is damaged and control is no longer possible, its safety can not be guaranteed. Please

protect with something other than this IC.

Note 3: Temperature detection is the setting value at B constant 3435 (10KC15-1608 made by Ishizuka

Denshi).

Note 4: Use a capacitor with good temperature characteristics in the oscillator. Capacitor deviation will

contribute to timer error.

Note 5: If the battery overdischarges, charge 1mA for 14 seconds, and if it does not switch to pre-charging

during that interval, it means the IC has identified a battery abnormality.

OSC CR Setting Reference Materials

(1) OSCR CR-Oscillation Cycle T Examples

R

C

0.0047µ 0.47mS 0.63mS 0.75mS 0.82mS 0.94mS 1.26mS

0.0082µ 0.83mS 1.10mS 1.32mS 1.43mS 1.65mS 2.20mS

75k 100k 120k 130k 150k 200k

0.01µ 1.03mS 1.37mS 1.63mS 1.77mS 2.04mS 2.73mS

0.015µ 1.48mS 1.98mS 2.38mS 2.58mS 2.97mS 3.95mS

0.022µ 2.16mS 2.87mS 3.44mS 3.73mS 4.30mS 5.76mS

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(2) Timer Times

IC for Control of Lithium-ion Batteries Charging MM1433

Pre-charge timer T 2
Full charge timer T 2
1mA charge time T 2

Full charge detection delay time T 2

Overcurrent detection delay time T 2

Overvoltage detection delay time T 2

Re-charge detection delay time T 2

LED R blinking cycle T 2

Note: T: OSC oscillation cycle

Measuring Circuit

Item

Calculation formula

19

23

13

6

8

8

5

10

Examples of calculation (for C = 0.01µ, R = 230k)

15min. 28S

4h7min.

14.5S

0.11S

0.45S

0.45S

56.6mS

1.8S

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MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Measurement Procedures

(Except where noted otherwise, Ta = 25°C, VCC=5V, V1=V2=0V, V13=4.2V,

SW12, 17, 20, 22, 24:A, I15=0mA Timers are not in time up state.)

Item Measurement Procedures

Consumption current V1 = 1.2V. Measure A18 current value I

Reference voltage Measure T5 potential V

ADP detection voltage L

Gradually lower Vcc from 5V; V
below 0.5V.

ADP detection voltage L Gradually lower V

CC

-

Hysteresis voltage width goes over V

ADP detection voltage H

Gradually increase Vcc from 5V. Vcc potential is VADPH when T20 potential
drops below 0.5V.

0.5V. VADPLW = VADLP2-VADPL

ADP detection voltage H Gradually lower V

CC

-

Hysteresis voltage width goes over V

Impedance for

ADP Ldetection output

BAT pin leak current V

BAT pin output voltage

CNT pin output voltage

V

CC = 7V, SW20: B, V20

CC = 0V, SW17: B, V17 = 0V. Measure A13 current value IBAT.

Gradually lower V13 from 3.5V. T13 potential is V
difference falls to less than 20mV.
V13 = 3.5V, SW17: B. Gradually raise V17 from 0V. T17 potential is V
A17 current value 20mA.

0.5V. VADPHW = VADPH-VADPH2

CHGSW pin input current Measure A1 current value I

CHGSW pin input voltage H
CHGSW pin input voltage L

V13 = 3.5V. Raise V1 from 0V to 1.2V. CHGSW: ON when A13 is more than
500mA. CHGSW: OFF when A13 is less than 1mA. Measure VSW.

REF.

CC

-

potential is VADPL when T20 potential drops

CC

-

from 2V. VCC -potential is VADPL2 when T20 potential

CC from 7V. VCC potential is VADPH2 when T20 potential

-

0.5V, impedance between T20-GND is ZADPL.

SW.

RESET pin input current Measure A2 current value IRE.

RESET pin input voltage H

RESET pin input voltage L

V13 = 3.5V. Raise V2 from 0V to 1.2V. Charging control circuit: ON when A13 is more
than 500mA. Charging control circuit: OFF when A13 is less than 1mA. Measure V

Current limit 1 V13 = 3.5V. T15-T13 potential difference is VL1.
Current limit 2 V13 = 3.5V. T15-T13 potential difference is V

Full charge detection

Low voltage detection voltage

Low voltage detection voltage

Hysteresis voltage width goes over 10mA. V

Pre-charge detection voltage

Pre-charge detection voltage

Hysteresis voltage width goes under 150mA. V

SW24: B, I15 = 100mA. Gradually reduce I15 current value after reset. T15
T13 potential difference is VF when T21 potential goes under 0.5V.
Gradually raise V13 from 0V. T13 potential is VLV when A13 current value goes
over 50mA.
Gradually lower V13 from 2.5V. T13 potential is VLV2 when A13 current value

LVW = VLV

-

VLV2
Gradually raise V13 from 2.5V. T13 potential is VP when A13 current value
goes over 500mA.
Gradually lower V13 from 3.5V. T13 potential is VP2 when A13 current value

PW = VP= VP2

Wait about 1S at V13 = 4.2V; in full charge detection state, gradually lower V13

Re-charge detection voltage

Overvoltage detection voltage

potential to lower T21 potential to under 0.5V. T13 potential is VR when T21

CC

-

potential is more than V

0.5V.
Gradually raise V13 from 4V. T13 potential is VOV when T22 potential starts to
repeat HI/LOW.

Battery temperature V13 = 3.5V, SW12: B. Gradually raise V12 from 0.6V. T12 potential is V

detection voltage H when A13 current value goes under 1mA.

Battery temperature V13 = 3.5V, SW12: B. Gradually raise V12 from 0V. T12 potential is V

detection voltage L1 A13 current value goes over 500mA.

Battery temperature V13 = 3.5V, SW12: B. Gradually raise V12 from 0.6V. T12 potential is V

detection voltage L2 when A13 current value goes over 1mA.

TDET input bias current SW12: B, V12 = 0V. Measure A12 current value IT.

LED R pin output voltage

V13 = 3.5V, SW22: B. Gradually raise V22 from 0V. T22 potential is V
when A22 current value is 10mA.
Wait about 1S at V13 = 4.2V; in full charge detection state, make T21 potential

LED G pin output voltage

0.5V or less. Next at SW21: B, gradually raise V21 from 0V. T21 potential is

LEDG when A21 current value is 10mA.

V

CC.

BAT when T15

L2.

-

T13 potential

CNT when

TH

TL1 when

TL2

LEDR

RE

.

-

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0V

0A

0A

VCC

5.5V

4.1V

V

CC: ON

Start

2V

2.9V

1mA Charging Pre-

charge

Full charge

ON

OFF

ON

ON

OFF

OFF

Full

charge

Re-

charge

3.9V

BAT pin
voltage

Charging current

LED G

LED R

VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

3V

0A

OFF

OFF

7V

VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

3V

0A

OFF

OFF

5.5V

VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

4.35V

0A

ON/OFF 0.57Hz

OFF

5.5V

Abnormality detection at BA
pin overvoltage for 0.5S or more

MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Timing Chart

Charging performed normally Adapter abnormality

Power supply setting error (temperature detection pin open)

Battery overcharge

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VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

0A

0V

OFF

5.5V

2V or less

14S

1mA charging

ON/OFF 0.57Hz

No battery
voltage reset

VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

0A

OFF

ON

5.5V

Battery voltage

2V or less

15min.

Charging at about

12% of full charge

ON/OFF 0.57Hz

Battery voltage

2.9V or less

VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

0A

OFF

ON

5.5V

Battery voltage

2.9V or more

4H

Full charge

ON/OFF 0.57Hz

No full charge

detection

IC for Control of Lithium-ion Batteries Charging MM1433

Battery overdischarge Overcurrent detection

Overcurrent detection does not function

Pre-charge time up Full charge time up

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VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

4.1V

0A

ON

ON

OFF

OFF

5.5V

0.11S

1

VCC

BAT pin
voltage

Charging current

LED G

LED R

0V

3.9V

0A

ON

ON

Full charge

OFF

OFF

5.5V

56mS

IC for Control of Lithium-ion Batteries Charging MM1433

Battery full charge Re-charge detection

Application Circuit

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Flow Chart

IC for Control of Lithium-ion Batteries Charging MM1433

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0.3

0.25

0.2

0.15

0.1

-

25 0 25 50 75

Ambient temperature (°C)

Current limit 1 (V)

0

10

20

30

40

50

-

250 255075

Ambient temperature (°C)

Current limit 2 (mV)

4.05

4.06

4.07

4.08

4.09

4.1

4.11

4.12

4.13

4.14

4.15

-

250 255075

Ambient temperature (°C)

BAT pin output voltage (V)

-

250 255075

3.85

3.86

3.87

3.88

3.89

3.9

3.91

3.92

3.93

3.94

3.95

Ambient temperature (°C)

Re-charge detection voltage (V)

0

0.1

0.2

0.3

0.4

0.5

1 10 100

ICNT current (mA)

Ta=25°C

VCNT voltage (V)

1 10 100

0

0.1

0.2

0.3

0.4

0.5

ILED G, R current (mA)

G

R

Ta=25°C

VLED G, R voltage (V)

100 120 140 160 180 200

0

1

2

3

4

5

6

C=0.0047µF

C=0.01µF

C=0.022µF

OSC resistance R (kΩ)

Ta=25°C

Oscillation cycle (mS)

BAT pin voltage (V)

BAT pin reverse current (µA)

0

0.01

0.02

0.03

0.04

0.05

0.06

0.07

0.08

0.09

0.1

0

0.5 1 1.5 2 2.5 3 3.5 4 4.5

Characteristics

IC for Control of Lithium-ion Batteries Charging MM1433

Current limit 1 -Temperature

BAT pin output voltage -Temperature

Current limit 2 -Temperature

Re-charge detection voltage -Temperature

VCNT voltage -ICNT current

OSC oscillation cycle -CR

VLED G, R voltage - ILED G, R current

BAT pin reverse current -BAT pin

voltage