MITSUMI
Lithium-Ion Battery Charge Control (1 cell) MM1333
Lithium-Ion Battery Charge Control (1 cell)
Monolithic IC MM1333
Outline
This IC was developed for lithium-ion battery charge control. It controls charging with an external PNP power
transistor or p-MOSFET. It is used only for 1-cell batteries and provides a high-precision charge voltage.
Charge current can be set with an external resistor. In addition, it includes the functions of MM1332
(conventional IC) and incorporates a comparator for full-charge detection.
Temperature conditions A: Ta=-25~75°C, B: Ta=-20~70°C, C: Ta=0~50°C,
D: Ta=0~40°C
Package
VSOP-8A
DW
MM1333
HW
JW
Output voltage
temperature
conditions
D
D
D
Full charge
detection
voltage (mV)
20±3
31±5
31±5
Over voltage
detection
voltage (v)
Series Table
4.200±0.050
4.100±0.050
4.200±0.050
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Output
voltage (V)
Remarks
1cell
1cell
1cell
*
Features
1. Output voltage 1 (Ta=25°C)
2. Output voltage 2 (Ta=0°C~+40°C)
3. Constant-current output
Package
VSOP-8A (MM1333 W)
Note: The box represents an output (charge) voltage rank.
Application
Lithium-ion battery chargers
Ph
as
ed
4. Low voltage (LV) detection function
5. Full-charge detection function
O
ut
4.100V±35mV
4.100V±50mV
Current limit
100mV±10mV
Constant current value = current limit/external resistance
2.00V±100mV
Detection voltage
31mV±5mV
Pr
Note: In the case of rank D, the Co output voltage level changes to "L" when charging is turned ON. (The
function is reversed in the case of ranks H and J).
*
MITSUMI
Lithium-Ion Battery Charge Control (1 cell) MM1333
Pin Description
Pin no.
1
Values given are standard
Function
Input pin for on/off control
SW=V
CC
: off, SW=GND : on
Pulled up to V
CC
, so turned off when open
Full-charge signal output pin
While charging : Open collector output NPN transistor is off
At full charge : Open collector output NPN transistor is on
GND pin
Full charge detection pin
The current is detected through the voltage drop across an external
resistance, to control the full-charge signal.
The ratio of the charge current set by CS1 and the current at full-charge signal
output is (VIC)/(0.1 V R4/(R3+R4))
Current detection pin
The current is detected through the voltage drop across an external
resistance, to maintain a constant current. The current value can be set using
0.1 V/(R3+R4).
Battery voltage input pin
The battery voltage is detected and used to maintain the voltage at the
prescribed value.
A low-voltage detection circuit is also present, and charging is forbidden when
the battery voltage is less than 2V.
Constant-voltage circuit output pin
The base of an external PNP transistor or gate of a P-MOS FET is controlled in
constant-voltage charging.
Power supply input pin
Pin name Input/output
SW
CO
GND
Input
output
Input
2
3
4
CS2
Input
5
CS1
Input
6
CEL
Input
7
8
EXT
V
CC
Output
Input
Absolute Maximum Ratings
Item
Storage temperature
(Ta=25°C)
O
ut
Symbol
T
STG
T
OPR
V
CC
max.
V
O
max.
V
SW
Pd
Ratings
-40~+125
-20~+70
-0.3~+13
-0.3~V
CC
-0.3~V
CC
+0.3
300
Units
°C
°C
V
V
V
mW
Symbol
T
OPR
V
OPR
Ratings
-20~+70
+3~+12
Units
°C
V
Operating temperature
Power supply voltage
Output voltage
Recommended Operating Conditions
Item
Operating temperature
Operating voltage
Ph
SW input voltage
Allowable loss
as
ed
Pr
od
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MITSUMI
Lithium-Ion Battery Charge Control (1 cell) MM1333
Electrical Characteristics
Item
Consumption current 1
Consumption current 2
Consumption current 3
Output voltage 1
Output voltage 2
Output voltage temperature drift
Current limit
CEL-CS leakage current
SW input current
SW input voltage
Low-voltage detection voltage
EXT pin input voltage
EXT pin output voltage
Full-charge detection voltage
Full-charge detection output L
Full-charge detection
output leakage current
(Except where noted otherwise, Ta=25°C, V
CC
=5V, SW2, 4, 6, 7 : A) Models listed MM1333
Symbol
I
CC
1
I
CC
2
I
CC
3
V
O
1
V
O
2
V
O
V
CL
I
CEL
I
SW
V
L
V
H
L
V
I
S
V
EXT
V
IC
V
COL
I
CO
Measurement conditions
VSW=0V (Charge : ON)
VSW=0V (Charge : ON)
VSW=V
CC
(Charge : OFF)
Ta=25°C
Ta=0~+40°C
Ta=-20~+70°C
Min. Typ.
300
1.1
2
4.065 4.100
4.050 4.100
Max. Units
400
µA
1.6 mA
4
µA
4.135 V
4.150 V
mV
±0.25
°C
90
100 110 mV
1
µA
20
µA
-0.3
2.0
V
V
CC
-1.0
V
CC
+0.3 V
1.90 2.00 2.10
V
10
20
mA
0.3
V
CC
-0.3 V
26
31
36
mV
0.2
0.4
V
1
µA
Charge : ON
Charge : OFF
No load
I
SINK
=0.3mA
Measurement Method
Item
(Except where noted otherwise, Ta=25°C, V
CC
=5V, SW2 : A, SW4 : A, SW6 : A, SW7 : A)
Consumption current 1
Set V1=0 V, SW4=B, V4=50mV, V6=4.5V ; switch SW6 from A to B and again to A ; then measure the A8 current I
CC
1.
Consumption current 3
Set V1=V
CC
, and measure the resulting A8 current I
CC
3.
Output voltage
Current limit
Set V1=0V, V6=4.5V; switch SW6 from A to B and again to A ; then measure the T6 voltage V
O
.
Set V1=0V, set the voltage V6 about 1V lower than the potential at T6 (output voltage), and set SW6
to B ; then measure the T5 voltage V
CL
.
CEL-CS leakage current
Set V
CC
=0V, V1=0V; set the voltage V6 to 5V; and set SW6 to B and SW7 to C. Then measure the A6 current I
CEL
.
Set the voltage V6 1V lower than the T6 potential (output voltage), and set SW6 to B. With the
SW input voltage
voltage V1 variable, when the A6 current is 100mA or higher this voltage is equal to the charge-on
voltage (VL), and when the current is within ±10µA it is equal to the charge-off voltage (VH).
Low-voltage
Set V1=0 V, set V6 to 1V lower than the T6 potential (output voltage), and set switch SW6 to B. Then
detection voltage
gradually lower the voltage V6 ; the voltage V6 at which the A6 current is within ±10µA is LV.
EXT pin input voltage
Measure the A7 current IS with V1=0V, SW6 set to B, SW7 set to B, V6=3V, and V7=4V.
EXT pin output voltage
Full-charge
detection voltage
Full-charge
detection output L
Full-charge detection
output leakage current
Set V1=0 V, SW6 to B, and SW7 to C. The T7 voltage when V6=3V and V6=5V is V
EXT
.
Set V1=0V and SW4 to B. Gradually lower the voltage V4 from 50mV ; the voltage V4 when the T2
potential falls to 1V or lower from (V
CC
-1) V or higher is VIC.
Measure the T2 voltage V
COL
when V1=0V, SW4 is at B and V4=0V.
Measure the A2 current I
CO
when V1=0V, SW4 is at B, V4=50mV, SW2 is at B, and V2=5V.
Warnings regarding use
1. The following components should be added in preparation for use.
1. A capacitance of several µF or so between V
CC
and GND
2. A 10µF capacitor between CEL and CS
3. A diode to prevent backflow between the collector of the external PNP transistor and pin 6
4. A current-limiting 150Ω resistor between the base of the external PNP transistor and EXT
2. The full charge detection circuit detects voltages of order several mV, and so no hysteresis is applied.
Chattering will occur, and should be born in mind.
3. There is an internal low-voltage detection circuit. If a voltage of at least 2V is not applied to the CEL pin, no
output will be obtained.
Ph
as
SW input current
With V1=0V, measure the A1 current I
SW
1.
ed
O
ut
Consumption current 2
Set V1=0V, SW4=B, V4=50mV, V6=4.5V ; switch SW6 from A to B and again to A ; then measure the A8 current I
CC
1.
Pr
Measurement Method
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uc
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