MM1433_ [MITSUMI]
Lithium-Ion Battery Charge Control (1 to 2 cells); 锂离子电池充电控制（ 1 〜2个细胞）
| 型号： | MM1433_ |
| 厂家： | 
MITSUMI ELECTRONICS, CORP. |
| 描述： | Lithium-Ion Battery Charge Control (1 to 2 cells) |
| 文件： | 总18页 (文件大小：204K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Lithium-Ion Battery Charge Control (1 to 2 cells)
Monolithic IC MM1433
Outline
This IC is used to control charging of lithium-ion batteries. It is a one-chip charge control IC where the
protection circuit incorporates constant-current/constant-voltage charge and precharge, overcharge timer,
and battery temperature detection functions. It was developed by adding the above-described functions to
the conventional MM1332 and MM1333.
Temperature conditions A: Ta=
-
25~75°C, B: Ta=
-20~70°C, C: Ta=0~50°C,
Series Table
D: Ta=0~40°C
Output
voltage
voltage (V) temperature
conditions
Package
Full charge Over voltage
detection detection
voltage (mV) voltage (v)
Output
Remarks
*
SOP-8C, 8E VSOP-8A, 8B TSOP-16A TSOP-24A
AV
BV
EV
4.100±0.0ꢀ0
8.400±0.0ꢁ0
4.200±0.0ꢀ0
C
C
C
18±±
12±±
18±±
4.ꢀ±±0.0±
8.70±0.10
4.ꢀ±±0.0±
1cell
2cell
1cell
MM1433
Features
1. Charge voltage accuracy (Ta=0°C ~ +50°C)
2. Current consumption
30mꢀ/cell
5mA typ.
3. Precharge function
4. Recharge function
5. Overcharge timer
6. Battery temperature detection function
7. Adaptor (primary side) abnormality detection function
8. LED driver (R, G pins)
9. Available for 1 to 2 cells
Package
TSOP-24A
Applications
For lithium-ion battery charge control
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Pin Assignment
1
2
CHGSW
RESET
TP1
13
14
15
16
17
18
19
20
21
22
23
24
BAT1
BAT2
CS
3
4
TP2
CFB
24 23 22 21 20 19 18 17 16 15 14 13
5
VREF
GND1
GND2
ADJ1
ADJ2
ADJꢀ
ADJ4
TDET
CNT
6
VCC
7
ADJ±
VOUT
1 2 3 4 5 6 7 8 9 10 11 12
8
TSOP-24A
9
LED G
LED R
OSC OUT
10
11
12
OSC FB
-
Block Diagram
33pF
33pF
33pF
Note: For lithium ion battery charging control (1-2 cells) For mobile telephones and other cases in which high
frequency noise could be a problem, we recommend lowering impedance by adding 33pF capacitance
between the ꢀREF pin and GND, between the CS pin and GND, and between external PNP TR base and GND.
Please make sure that the wiring on the pattern is kept as short as possible. When implementing noise
countermeasures, be sure to consider the set as a whole.
Applicable circuits shown are typical examples provided for reference purposes. Mitsumi cannot assume
responsibility for any problems arising out of the use of these circuits or for any infringement of third party
patent and other right due to same.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Pin Description
Pin No. Pin name
I/O
Functions
Forced charging OFF pin
1
2
CHGSW Input
RESET Input
L: Forced charging circuit ON (OFF for reset)
H: Charging stop is forced
Logic reset pin
L: Forced charging circuit ON (start)
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
Output TP1, to permit monitoring.
3
TP1
TP2
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/
4
5
Full charge timer test pin
Output
Same structure as TP1
Reference power supply output pin
VREF Output Outputs 1.2V typ. reference voltage. Used for temperature detection reference
power supply and ADJ1 - ADJ4 adjustment.
6
7
GND1 Input
GND2 Input
GND pin.
GND pin.
Overcurrent detection adjustment pin
Set so that overcurrent detection does not function. Pin voltage is 1.1ꢁV typ.
Overcurrent detection value can be varied by adjusting pin voltage with an external
resistor, etc. Overcurrent detection is based on a comparison of ADJ1 pin voltage
and a CS-BAT voltage drop of 12dB.
8
9
ADJ1
ADJ2
ADJꢀ
Input
Input
Input
Full charge detection adjustment pin
Pin voltage is set at 10ꢀmV 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.
10
Pre-charge current control is done by comparing ADJꢀ pin voltage and 12dB
voltage drop value between CS and BAT.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
Functions
MITSUMI
Pin No. Pin name
I/O
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
12
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.
Temperature detection input pin
Apply potential resistance divided by external resistor and thermistor from
reference voltage when using. Reset state will exist if TDET pin does not reach
the specified potential.
TDET
Input
13
14
BAT1
BAT2
Input
Input
Battery voltage input pins
Detect battery voltage and control charging.
Current detection pin
15
16
CS
Input
Input
Detects current by external resistor (between CS and BAT) voltage drop and
controls charging current.
Rated current control phase compensation pin
CFB
Oscillation is improved by connecting an external capacitor (around 100pf)
between CFB and CNT for phase compensation.
Charging control output pin
17
18
CNT Output
Controls external PNP-Tr base for rated current rated voltage charging.
Power supply input pin
VCC
Input
Input
Rated voltage control adjustment pin
19
20
ADJ±
Allows fine adjustment of rated voltage value. For example, rated voltage value
rises by around 1±mV (at 4.1V typ.) when ADJ±-GND is shorted.
Overvoltage detection output pin
VOUT
Output For VCC overvoltage input: L
For VCC recommended operating voltage: H
LED C control output pin
21
22
LED G Output
LED R Output
NPN-Tr open collector output. Refer to the flow chart for ON/OFF.
LED R control output pin
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
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 1ꢀ0kΩ and
capacitor of 0.01µF.
23
24
OSC OUT Output
OSC FB
-
Input
Oscillator inverted input pin
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
(Models listed MM1433E)
Pin Description
Pin No. Pin name Equivalent circuit diagram Pin No. Pin name Equivalent circuit diagram Pin No. Pin name Equivalent circuit diagram
1
2
3
4
5
8
9
CHGSW
RESET
TP1
10
11
12
13
14
15
16
ADJꢀ
ADJ4
TDET
BAT1
BAT2
CS
17
19
20
21
22
CNT
ADJ±
VOUT
TP2
LED G
LED R
VREF
ADJ1
ADJ2
23 OSC OUT
114.3k
CFB
24
OSC FB-
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
(Ta=25°C)
Absolute Maximum Ratings
Item
Symbol
Ratings
-40~+12±
Unit
°C
Storage temperature
Operating temperature
Power supply voltage
Allowable loss
TSTG
TOPR
-
20~+70
0.ꢀ~+1±
2±0
°C
VCC max.
Pd
-
V
mW
Recommended Operating Conditions
Item
Symbol
Ratings
Unit
Operating temperature
Charging control operating voltage
TOPR
-
20~+70
°C
V
VOPR
2.7~±.9
(Except where noted otherwise, Ta=25°C, VCC=5V) Models listed MM1433E
Electrical Characteristics
Measurement
Item
Symbol
Conditions
Min. Typ. Max. Unit
Pin
18
±
Consumption current
Reference voltage
ICC
±.0
7.0 mA
V
VREF
VADPL
1.207
ADP detection voltage L
ADP detection voltage L
Hysteresis voltage width
ADP detection voltage H
ADP detection voltage H
Hysteresis voltage width
Impedance for
VCC : H
VCC : L
L
20
2.ꢀ± 2.4± 2.±±
V
VADPLW
VADPH
20
20
20
±0
ꢁ.1
±0
100 1±0 mV
ꢁ.ꢀ ꢁ.±
100 1±0 mV
H
V
VADPHW
ZADPL
20
ꢀ0
kΩ
ADP detection output L
BAT pin leak current
IBAT
VBAT
VCNT
ISW
1ꢀ, 14, 1±
1
µA
V
BAT pin output voltage
CNT pin output voltage
CHGSW pin input current
CHGSW pin input voltage H
CHGSW pin input voltage L
RESET pin input current
RESET pin input voltage H
RESET pin input voltage L
Current limit 1
Ta=0~+±0°C
ICNT=20mA
1ꢀ
4.170 4.20 4.2ꢀ
0.±
17
V
1
40
ꢁ0
80
µA
V
VSWH
VSWL
IRE
CHGSW : OFF
CHGSW : ON
1
0.ꢁ
1.20
0.2±
80
1
2
V
40
ꢁ0
µA
V
VREH
VREL
VL1
Charging control circuit: OFF
Charging control circuit: ON
Quick charge
2
0.ꢁ
1.20
0.2±
2
V
14, 1±
14, 1±
14, 1±
1ꢀ
0.20 0.22 0.24
V
Current limit 2
VL2
Pre-charge
21
1ꢀ
2ꢁ
18
ꢀ1
2ꢀ
mV
mV
V
Full charge detection
Low voltage detection voltage
VF
VLV
VBAT : L
H
1.90 2.00 2.10
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Measurement
Item
Symbol
Conditions
Min. Typ. Max. Unit
Pin
Low voltage detection voltage
Hysteresis voltage width
Pre-charge detection voltage
Pre-charge detection voltage
Hysteresis voltage width
Re-charge detection voltage
Overvoltage detection voltage
Battery temperature
VLVW
VP
1ꢀ
2±
2.80 2.90 ꢀ.00
2± ±0 100 mV
±0
100 mV
VBAT : L
H
1ꢀ
V
VPW
1ꢀ
VR
VBAT : H
L
1ꢀ
1ꢀ
ꢀ.8± ꢀ.90 ꢀ.9±
4.ꢀ0 4.ꢀ± 4.40
V
V
VOV
VBAT : L
H
Low temperature ꢀ°C
± ꢀ°C detection
VTH
VTL1
VTL2
12
12
12
0.8ꢀ± 0.8ꢁ0 0.88±
0.ꢀ90 0.41ꢀ 0.4ꢀ±
0.ꢀꢀ± 0.ꢀ±ꢀ 0.ꢀ70
V
V
V
detection voltage H
Battery temperature
High temperature 4ꢀ°C ± ꢀ°C
detection (charging start)
High temperature ±0°C ± ꢀ°C
detection (during charging)
detection voltage L1
Battery temperature
detection voltage L2
TDET input bias current
LED R pin output voltage
LED G pin output voltage
Timer error time
IT
12
22
ꢀ0
1±0
0.4
0.4
10
nA
V
VLEDR
VLEDG
T
ILEDR=10mA
ILEDG=10mA
21
V
Not including external deviation
21, 22
-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
75k
100k
120k
130k
150k
200k
C
0.0047µ
0.0082µ
0.01µ
0.47ms
0.8ꢀms
1.0ꢀms
1.48ms
2.1ꢁms
0.ꢁꢀms
1.10ms
1.ꢀ7ms
1.98ms
2.87ms
0.7±ms
1.ꢀ2ms
1.ꢁꢀms
2.ꢀ8ms
ꢀ.44ms
0.82ms
1.4ꢀms
1.77ms
2.±8ms
ꢀ.7ꢀms
0.94ms
1.ꢁ±ms
2.04ms
2.97ms
4.ꢀ0ms
1.2ꢁms
2.20ms
2.7ꢀms
ꢀ.9±ms
±.7ꢁms
0.015µ
0.022µ
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
(2) Timer Times
Item
Calculation formula
Examples of calculation (for C = 0.01µ, R = 230k)
Pre-charge timer
Full charge timer
1mA charge time
T
T
T
219
22ꢀ
21ꢀ
2ꢁ
1±min. 28s
4h7min.
14.±s
0.90s
0.4±s
0.4±s
±ꢁ.ꢁms
1.8s
Full charge detection delay time
Overcurrent detection delay time
Overvoltage detection delay time
Re-charge detection delay time
LED R blinking cycle
T
T
T
T
28
28
2±
T
210
Note: T: OSC oscillation cycle
Operation
1. Basic Functions
· Constant voltage/constant current control.
· Full charge status detection.
2. Protection Functions
· Protection when AC adapter or battery is abnormal.
· Protection from abnormal operation by monitoring battery temperature.
· Protection from abnormal operation by time limitation.
3. Warning Functions
· Constant lighting of green LED to show completion of normal charging
· Constant lighting of red LED to show normal charging operation
· Blinking of red LED showing charging disabled on detection of abnormality.
· Operation check of internal timer for time limitation
4. Forced Stop Function
· Forced stopping of charging by controlling RESET and CHGSW pins.
5. Charge Restart Functions
· Charge restart when battery voltage drop detection operates after full charge detection
· Charge restart by reconnecting after disconnecting AC adaptor
· Charge restart by reconnecting after removing batteries
· Charge restart by canceling forced stop operation
Description
1. Charging Operation
1.1 Start of Charging
· Charging is disabled at the start of charging in the following cases:
1) Battery is in overvoltage state, i.e., the battery voltage is higher than overcharge detection voltage
(ꢀov). (Charging is prohibited after overvoltage delay time elapses.)
2) AC adapter or battery is not correctly connected.
3) RESET pin and CHGSW pin are 0.6 ~ 1.2ꢀ.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
4) Pin 12 (TDET) is open.
· At the start of charging, charge waiting results in the following cases (initially prohibited, but charging
starts when the voltage returns to the normal range):
1) AC adapter supply voltage is less than ꢀADPL or higher than ꢀADPH.
2) Pin 12 (TDET) voltage is outside the range from battery temperature detection voltage L1 (ꢀTL1) to
battery temperature detection voltage H (ꢀTH). Even during charging or when fully charged, neither
LED will light up and the timer will be reset if pin 12 (TDET) voltage is outside the temperature range.
AC adapter abnormality detection, RESET and TDET will operate similarly.
· Except in the above cases, charging starts.
1.2 1mA Charging Operation
· When charging starts, if the battery's voltage is below the low voltage detection voltage (ꢀLꢀ), the
battery is charged using the 1mA charging current.
· If the battery is overdischarged, a time limit is provided by a 1mA charging timer in order to protect the
battery if the battery voltage does not rise because of some problem. If battery voltage does not reach
ꢀLꢀ within the time set by the 1mA charging timer, charging is prohibited.
· See "OSC CR Settings" on the data sheet for the 1mA charge timer setting.
1.3 Preparatory Charging Operation
· When battery voltage is higher than low voltage detection voltage (ꢀLꢀ), the battery is
charged by pre-charge current. The standard preparatory charging current is determined by dividing
current limit 2 (ꢀL2) by the value of the external resistance (0.3-Ω recommended) between pins 14 and 15.
This status is maintained until the battery's voltage rises and the voltage at pin 13 reaches the
preparatory charging detection voltage (ꢀP).
· However, if for some reason the battery does not reach the preparatory charge detection voltage (ꢀP),
the preparatory charge timer limits the time in this state in order to protect the battery. If the battery
does not reach the preparatory charge detection voltage (ꢀP) within the preparatory charge timer's
setting, charging is disabled.
· See "OSC CR Settings" on the data sheet for the preparatory charge timer setting.
1.4 Full Charging Operation
· When the battery voltage rises and the voltage at pin 13 reaches the preparatory charge detection
voltage (ꢀP), charging starts using the full charging current. The standard full charging current is
determined by dividing the current limit 1 (ꢀL1) by the value of the external resistance (0.3-Ω
recommended) between pins 14 and 15.
· As the battery voltage rises, operation switches from constant current charging to constant voltage
charging when the voltage at pin 13 approaches the output voltage at the BAT pin (ꢀBAT).
· After switching to constant voltage charging, the charging current is gradually reduced. When the
charging current drops below the value determined by dividing the full-charge detection value by the
external resistance (0.3-Ω recommended) between pins 14 and 15, charging continues for the value of
the full-charge detection delay timer, then stops, and the open collector NPN transistor at pin 21 (LED
G) turns ON.
· However, a time limit is provided by a full-charge timer in order to protect the battery if, due to some
abnormality, battery voltage does not reach BAT pin output voltage (ꢀBAT), or if charging current does
not drop off after switching to constant voltage charging and full charge detection does not operate.
After the full charge timer setting time has elapsed, charging will be prohibited in the above cases.
· See "OSC CR Settings" on the data sheet for the full-charge detection delay timer setting and full-
charge timer setting
· If, at the start of charging, the battery is already at BAT pin voltage, charging is continued for the value
of the full-charge detection delay timer and then stops, and the open collector NPN transistor at pin 21
(LED G) turns ON.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
1.5 Recharging Operation
· On detection of a full charge and after the end of charging, the battery voltage starts to drop.
Recharging starts when the voltage has dropped to the recharge detection voltage (There is no re-
charging detection function for rank B.).
2 Other Protective Functions
2.1 Forced Charge Disabling Function
· By setting pin 1 (CHGSW) or pin 2 (RESET) level HIGH (0.6ꢀ - 1.2ꢀ), charging is disabled. Normally,
ground these pins.
· Pin 1 (CHGSW): Charging ON/OFF only; timer continues to work. Used to temporarily prohibit
charging.
· Pin 2 (RESET): Resets timer simultaneously with charging ON/OFF.
· Disablement using pin 2 takes precedence over pin 1.
· Pin 1 and Pin 2 are connected to Pin 5 (reference power supply output: ꢀREF) via an internal resistor.
This reference power supply does not have sync capability, so high level should not exceed Pin 5
voltage (ꢀREF).
2.2 Temperature Monitoring Function
· A potential created by splitting the voltage at pin 5 (ꢀREF) using external resistor and thermistor is
monitored at pin 12 (TDET). Charging is disabled if, at the start of charging, the temperature is not
within the range of 3°C to 43°C, or between 3°C and 50°C during charging.
· If a thermistor is not used, a resistor can be connected for charging operation, but temperature
protection will not operate. Note: Battery OPEN detection assumes that the battery pack thermistor is
removable. If the thermistor is not used, a battery OPEN detection circuit is required.
· Pin 5 (ꢀREF) is approximately 1.207ꢀ 2% and output source current is approximately 180mA.
· Confirmation of charging prohibited status
If charging is prohibited during charging due to the timers reaching time up, the open collector NPN
transistor inside Pin 22 (LED R) will repeat ON/OFF. This can be verified by connecting Pin 22 (LED R)
via a resistor (pull-up connection) to an LED, which will blink.
2.3 Hysteresis and Delay Times
· To protect the circuit from malfunction due to noise, etc., hysteresis characteristics are applied to the
ADP detection voltage, low-voltage detection voltage, and preparatory charge detection voltage.
· Also, a constant delay time is applied to full-charge detection, over-voltage detection, and recharge
detection operations.
· The respective delay times are set by the internal timers. See the "OSC CR Settings" on the data sheet
for the timer settings.
3. Checking Charging Operation
· During pre-charging and full charge operations, the open collector NPN transistor inside Pin 22 (LED R) is
constantly ON. Pre-charging and full charge can be verified by connecting Pin 22 (LED R) via a resistor
(pull-up connection) to a red LED, which will be constantly lit.
· During 1mA charging operation, the open collector NPN transistor inside Pin 22 (LED R) repeats ON/OFF.
When operation switches from 1mA charging to pre-charging, the open collector NPN transistor inside Pin
22 (LED R) stays ON constantly. Switching from 1mA charging to pre-charging can be verified by
connecting Pin 22 (LED R) via a resistor (pull-up connection) to a red LED, which will be constantly lit.
· If charging is prohibited during charging due to the timer reaching time up, the open collector NPN
transistor inside Pin 22 (LED R) will repeat ON/OFF. This can be verified by connecting Pin 22 (LED R) via
a resistor (pull-up connection) to an LED, which will blink.
· Pre-charging timer operation can be verified by Pin 3 (TP1) high/low switching.
The TP1 pin signal inverts at the 10th stage of the pre-charge timer binary counter (total 19 stages) and
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
outputs on the TP pin. Referring to the data sheet “OSC CR setting reference materials,” when T = 1.77ms, a
waveform with cycle of approximately 1.8s is output.
· Full charge timer operation can be verified by Pin 4 (TP2) high/low switching.
The TP2 pin signal inverts at the 12th stage of the full charge timer binary counter (total 23 stages) and
outputs on the TP pin. Referring to the data sheet “OSC CR setting reference materials,” when T = 1.77ms, a
waveform with cycle of approximately 7.2s is output.
· The blinking period of the LED connected to pin 22 is determined by the internal timer. See the "OSC CR
Settings" on the data sheet for the timer settings.
4. Checking the End of Charging
· For full charge detection, after the full charge delay time elapses, the open collector NPN transistor inside Pin
22 (LED R) goes OFF, and the open collector NPN transistor inside Pin 21 (LED G) goes ON. This can be
verified by a pull-up connection of Pin 22 (LED R) to a red LED and of Pin 21 (LED G) to a green LED via
resistors. The red LED should be out and the green LED should be lit.
5. Checking Disabling of Charging
· In the case of the following cases in which charging is disabled, the open collector NPN transistors at pin 21
(LED G) and pin 22 (LED R) remain OFF. The LEDs connected to pins 21 and 22 will not turn on.
1) When the battery is not connected correctly.
2) When the AC adapter is not connected correctly, or the voltage output by the AC adapter is less than
ꢀADPL or higher than ꢀADPH.
· If charging is disabled because the charger is faulty, the voltage at pin 20 (ꢀout) switches from HIGH level
(pin 18 voltage to 0.5[v] max.) to LOW level (0.5[ꢀ] max.). You can check if the charger is faulty by monitoring
this voltage.
3) When battery temperature is outside the charging start temperature range.
6. Recharging from Full Charge
· Once charging ends as a result of the full-charge detection operation and the battery voltage drops as a
result of it being used and simply by its own natural discharge, recharging starts when the recharge detection
delay timer times out after the voltage drops to the recharge detection voltage.
· See the "OSC CR Settings" on the data sheet for the recharge detection delay time.
· There is no re-charging detection function for rank B.
7. Recovery from Charge-Disabled State
· The following conditions apply before recovery can be implemented from the charge-disabled state:
1) Disconnect and then reconnect the charger.
2) Disconnect and then reconnect the battery.
3) Set pin 2 (RESET) to the HIGH RESET pin input voltage, then return it to the LOW RESET pin input voltage.
8. Other States
· If power is supplied to MM1433 when a battery is not connected, the red LED may immediately start blinking
(red LED blinking cycle is higher than the setting value). This is because voltage that is not within the
temperature abnormality range detected by Pin 12 (TDET pin) is impressed, and Pins 13 and 14 (BAT 1, 2)
oscillate while they are open. In IC operating state, the oscillation occurs because BAT pin impedance is high
due to constant voltage control. The oscillation causes charging operation to go ON/OFF repeatedly, and the
red LED blinks at BAT oscillation frequency. On this IC, it is assumed that battery connection check will be
done using the thermistor inside the battery pack. If a thermistor is not used, the IC RESET pin will go
ON/OFF according to whether a battery is present or not.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Measuring Circuit
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
CC
(Except where noted otherwise, Ta = 25°C, V =5V, V1=V2=0V, V13=4.2V,
Measurement Procedures
SW12, 17, 20, 22, 24:A, I15=0mA Timers are not in time up state.)
Item
Measurement Procedures
Consumption current
Reference voltage
V1 = 1.2V. Measure A18 current value ICC.
Measure T± potential VREF.
Gradually lower Vcc from ±V; VCC
below 0.±V.
-
potential is VADPL when T20 potential drops
ADP detection voltage L
ADP detection voltage L
Hysteresis voltage width
Gradually lower VCC
goes over VCC
-from 2V. VCC -potential is VADPL2 when T20 potential
0.±V. VADPLW = VADLP2 -VADPL
-
Gradually increase Vcc from ±V. Vcc potential is VADPH when T20 potential
drops below 0.±V.
ADP detection voltage H
ADP detection voltage H
Hysteresis voltage width
Impedance for
ADP Ldetection output
BAT pin leak current
Gradually lower VCC from 7V. VCC potential is VADPH2 when T20 potential
goes over VCC
-0.±V. VADPHW = VADPH -VADPH2
VCC = 7V, SW20: B, V20
-
0.±V, impedance between T20-GND is ZADPL.
VCC = 0V, SW17: B, V17 = 0V. Measure A1ꢀ current value IBAT.
Gradually lower V1ꢀ from ꢀ.±V. T1ꢀ potential is VBAT when T1±
difference falls to less than 20mV.
-
T1ꢀ potential
BAT pin output voltage
V1ꢀ = ꢀ.±V, SW17: B. Gradually raise V17 from 0V. T17 potential is VCNT when
A17 current value 20mA.
Measure A1 current value ISW.
CNT pin output voltage
CHGSW pin input current
CHGSW pin input voltage H V1ꢀ = ꢀ.±V. Raise V1 from 0V to 1.2V. CHGSW: ON when A1ꢀ is more than
CHGSW pin input voltage L ±00mA. CHGSW: OFF when A1ꢀ is less than 1mA. Measure VSW
.
RESET pin input current
RESET pin input voltage H
RESET pin input voltage L
Current limit 1
Measure A2 current value IRE.
V1ꢀ = ꢀ.±V. Raise V2 from 0V to 1.2V. Charging control circuit: ON when A1ꢀ is more
than ±00mA. Charging control circuit: OFF when A1ꢀ is less than 1mA. Measure VRE
V1ꢀ = ꢀ.±V. T1±-T1ꢀ potential difference is VL1.
.
Current limit 2
V1ꢀ = ꢀ.±V. T1±-T1ꢀ potential difference is VL2.
SW24: B, I1± = 100mA. Gradually reduce I1± current value after reset. T1±
T1ꢀ potential difference is VF when T21 potential goes under 0.±V.
-
Full charge detection
Gradually raise V1ꢀ from 0V. T1ꢀ potential is VLV when A1ꢀ current value goes
over ±0mA.
Low voltage detection voltage
Low voltage detection voltage Gradually lower V1ꢀ from 2.±V. T1ꢀ potential is VLV2 when A1ꢀ current value
Hysteresis voltage width
goes over 10mA. VLVW = VLV -VLV2
Gradually raise V1ꢀ from 2.±V. T1ꢀ potential is VP when A1ꢀ current value
goes over ±00mA.
Pre-charge detection voltage
Pre-charge detection voltage Gradually lower V1ꢀ from ꢀ.±V. T1ꢀ potential is VP2 when A1ꢀ current value
Hysteresis voltage width
goes under 1±0mA. VPW = VP= VP2
Wait about 1s at V1ꢀ = 4.2V; in full charge detection state, gradually lower V1ꢀ
Re-charge detection voltage potential to lower T21 potential to under 0.±V. T1ꢀ potential is VR when T21
potential is more than VCC 0.±V.
-
Gradually raise V1ꢀ from 4V. T1ꢀ potential is VOV when T22 potential starts to
repeat HI/LOW.
Overvoltage detection voltage
Battery temperature
detection voltage H
Battery temperature
detection voltage L1
Battery temperature
detection voltage L2
TDET input bias current
V1ꢀ = ꢀ.±V, SW12: B. Gradually raise V12 from 0.ꢁV. T12 potential is VTH
when A1ꢀ current value goes under 1mA.
V1ꢀ = ꢀ.±V, SW12: B. Gradually raise V12 from 0V. T12 potential is VTL1 when
A1ꢀ current value goes over ±00mA.
V1ꢀ = ꢀ.±V, SW12: B. Gradually raise V12 from 0.ꢁV. T12 potential is VTL2
when A1ꢀ current value goes over 1mA.
SW12: B, V12 = 0V. Measure A12 current value IT.
V1ꢀ = ꢀ.±V, SW22: B. Gradually raise V22 from 0V. T22 potential is VLEDR
when A22 current value is 10mA.
LED R pin output voltage
Wait about 1s at V1ꢀ = 4.27V; in full charge detection state, make T21 potential
0.±V or less. Next at SW21: B, gradually raise V21 from 0V. T21 potential is
VLEDG when A21 current value is 10mA.
LED G pin output voltage
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Timing Chart
Charging performed normally
Adapter abnormality
ꢀCC: ON
Start
5.5ꢀ
7ꢀ
VCC
VCC
0ꢀ
0ꢀ
BAT pin
3ꢀ
voltage
4.1ꢀ
2ꢀ
BAT pin
voltage
3.9ꢀ
Re-
2.9ꢀ
Charging current
0A
LED R
Charging current
OFF
0A
0A
Full
1mA Charging Pre- Full charge
charge
charge charge
LED G
OFF
OFF
ON
LED R
ON
LED G
OFF
ON
OFF
Power supply setting error (temperature detection pin open)
Battery overcharge
5.5ꢀ
5.5ꢀ
VCC
VCC
0ꢀ
0ꢀ
BAT pin
voltage
BAT pin
voltage
4.35ꢀ
3ꢀ
Abnormality detection at BA
pin overvoltage for 0.5s or more
Charging current
Charging current
0A
0A
LED R
LED G
LED R
OFF
OFF
ON/OFF 0.57Hz
LED G
OFF
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
Overcurrent detection
MITSUMI
Battery overdischarge
Overcurrent detection does not function
A Lank
5.5ꢀ
VCC
0ꢀ
No battery
BAT pin
voltage
voltage reset
2ꢀ or less
14s
0ꢀ
Charging current
0A
1mA charging
LED R
LED G
ON/OFF 0.57Hz
OFF
Pre-charge time up
Full charge time up
5.5ꢀ
5.5ꢀ
VCC
VCC
0ꢀ
0ꢀ
Battery voltage
2.9ꢀ or more
No full charge
detection
Battery voltage
2ꢀ or less
Battery voltage
2.9ꢀ or less
BAT pin
voltage
BAT pin
voltage
4H
15min.
Charging current
Charging current
Full charge
0A
0A
Charging at about
12% of full charge
LED R
LED G
LED R
LED G
ON
ON
ON/OFF 0.57Hz
ON/OFF 0.57Hz
OFF
OFF
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
Re-charge detection
MITSUMI
Battery full charge
5.5ꢀ
VCC
VCC
5.5ꢀ
0ꢀ
0ꢀ
3.9ꢀ
4.1ꢀ
BAT pin
voltage
BAT pin
voltage
0.9s
56ms
Charging current
Charging current
Full charge
0A
0A
LED R
LED G
LED R
LED G
ON
OFF
ON
OFF ON
OFF
ON
OFF
Application Circuit
Note 1: This can be controlled even if a P-MOS FET is used in place of the external PNP-Tr. If you are using a
P-MOS FET, insert a resistance of several thousand ohms between the source and gate.
Note 2: Applicable circuits shown are typical examples provided for reference purposes. Mitsumi cannot
assume responsibility for any problems arising out of the use of these circuits or for any infringement
of third party patent and other right due to same.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
(Models listed MM1433A)
Flow Chart
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
MITSUMI
Characteristics
Current limit 1 vs Ambient temperature
Current limit 2 vs Ambient temperature
0.3
50
40
30
20
10
0
0.25
0.2
0.15
0.1
-
25
0
25
50
75
-25
0
25
50
75
Ambient temperature (°C)
Ambient temperature (°C)
BAT pin output voltage vs Ambient temperature
Re-charge detection voltage vs Ambient temperature
3.95
3.94
3.93
3.92
3.91
3.9
4.15
4.14
4.13
4.12
4.11
4.1
4.09
4.08
4.07
4.06
4.05
3.89
3.88
3.87
3.86
3.85
-
25
0
25
50
75
-
25
0
25
50
75
Ambient temperature (°C)
Ambient temperature (°C)
VCNT voltage vs ICNT current
VLED G, R voltage vs ILED G, R current
Ta=25°C
Ta=25°C
0.5
0.4
0.3
0.2
0.1
0
0.5
0.4
G
0.3
0.2
R
0.1
0
1
10
100
1
10
100
ILED G, R current (mA)
ICNT current (mA)
OSC oscillation cycle vs CR
BAT pin reverse current vs BAT pin voltage
Ta=25°C
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.02
0.01
0
6
5
4
3
2
1
0
C=0.022µF
C=0.01µF
C=0.0047µF
100
120
140
160
180
200
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
OSC resistance R (kΩ)
BAT pin voltage (V)
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