View MM1333_467252.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
Control for Lithium Ion Battery Charging (one cell)
Monolithic IC MM1333
Outline
This IC was developed for use in charging lithium ion batteries. PNP power transistor or P-MOS FET is mounted externally to control charging. This IC is for use with a single cell only, and provides precise control of the charging voltage ; the charging current can be set through an external resistance. In addition to the functions of the MM1332, it incorporates a comparator for full-charge detection. Temperature conditions A: Ta=-25~75C, B: Ta=-20~70C, C: Ta=0~50C, D: Ta=0~40C
Package VSOP-8A, 8B DW MM1333 HW JW Output voltage temperature conditions D D D Full charge detection voltage (mV) 203 315 315 Over voltage detection voltage (v)
Series Table
Output voltage (V) 4.2000.050 4.1000.050 4.2000.050
Remarks 1cell 1cell 1cell
*
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).
Features
1. Output voltage 1 (Ta=25C) 2. Output voltage 2 (Ta=0C~+40C) 3. Constant-current output 4. Low-voltage (LV) detection function 5. Full-charge detection function 4.100V35mV 4.100V50mV Current limit 100mV10mV Constant current value = current limit/external resistance 2.00V100mV Detection voltage 31mV5mV
Package
VSOP-8A (MM1333 W) Note: Output (charge) voltage rank is inside the .
Applications
1. Lithium ion battery chargers
MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
Block Diagram
MM1333J, H
+B
BATTERY PACK
8
7
2V
BUF
6
J:4.2V H:4.1V
5
-B
1.2V R3 0.10V
0.031V
1
2
3
4
R4
MM1333D
+B
BATTERY PACK
8
7
2V
BUF
6
D:4.2V
5
-B
VCC 1.2V R3 0.10V
0.020V
200
2
200 CO2
1
2
3
4
GND R4 CO Pin Part
Pin Assignment
1 8 7 6 5 2 3 1 2 3 4 4 5 6 SOP-8C SOP-8E VSOP-8A 7 8 SW CO GND CS2 CS1 CEL EXT VCC
MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
Pin Description
Pin no. 1
Values given are standard Function
Input pin for on/off control SW=VCC : off, SW=GND : on Pulled up to VCC, 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 GROUND 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 VCC
Output Input
Absolute Maximun Ratings
Item Storage temperature Operating temperature Power supply voltage Output voltage SW input voltage Allowable loss
(Ta=25C) Symbol TSTG TOPR VCC max. VO max. VSW Pd Ratings -40~+125 -20~+70 -0.3~+13 -0.3~VCC -0.3~VCC+0.3 300 Units C C V V V mW
Recommended Operating Conditions
Item Operating temperature Operating voltage Symbol TOPR VOPR Ratings -20~+70 +5~+12 Units C V
MITSUMI
Control for Lithium Ion Battery Charging (one 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=25C, VCC=5V, SW2, 4, 6, 7 : A) Models listed MM1333 Symbol ICC1 ICC2 ICC3 VO1 VO2 VO VCL ICEL ISW VL VH LV IS VEXT VIC VCOL ICO Measurement conditions VSW=0V (Charge : ON) VSW=0V (Charge : ON) VSW=VCC (Charge : OFF) Ta=25C Ta=0~+40C Ta=-20~+70C Min. Typ. 300 1.1 2 4.065 4.100 4.050 4.100 Max. Units 400 A 1.6 mA 4 A 4.135 V 4.150 V mV 0.25 C 90 100 110 mV 1 A 20 A -0.3 2.0 V VCC-1.0 VCC+0.3 V 1.90 2.00 2.10 V 10 20 mA 0.3 VCC-0.3 V 26 31 36 mV 0.2 0.4 V 1 A
Charge : ON Charge : OFF
No load ISINK=0.3mA
Measurement Method
Item
(Except where noted otherwise, Ta=25C, VCC=5V, SW2 : A, SW4 : A, SW6 : A, SW7 : A) Measurement Method
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 ICC1. 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 ICC1. Consumption current 3 Set V1=VCC, and measure the resulting A8 current ICC3. 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 VO. 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 VCL.
CEL-CS leakage current Set VCC=0V, V1=0V; set the voltage V6 to 5V; and set SW6 to B and SW7 to C. Then measure the A6 current ICEL. SW input current With V1=0V, measure the A1 current ISW1.
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 10A 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 10A 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 VEXT. 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 (VCC-1) V or higher is VIC. Measure the T2 voltage VCOL when V1=0V, SW4 is at B and V4=0V. Measure the A2 current ICO 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 F or so between VCC and GND 2. A 10F 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 150 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.
MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
Timing Chart
MM1333J, H
VCC
0
Battery connected and SW on
OFF SW
VL (-0.2~2.0V)
ON
(VCC - 1.0 ~ VCC + 0.3) VH
OFF
ON
CEL
0 100mV
Charge off
Charge on
31mV
CS1,2 (When R3=0)
Normal charging
0 H
CO
0
L
Charge on signal
Full-charge signal
CEL
0
Charge off CS1,2 (When R3=0) CO
0 0 H L
Low battery voltage (2V or lower)
With CO pulled up to VCC by a resistance Battery connected and SW ON VCC
0
MM1333D
OFF SW
0
ON
OFF
ON
CEL
0 100mV
Charge OFF
Charge ON
20mV
CS1,2 (When R3=0)
Normal charging
0 H
CO
0
L
Charge ON signal
Full-charge signal
CEL
0
Charge OFF CS1,2 (When R3=0) CO
0 0 H
Low battery voltage (2V or lower)
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
Control for Lithium Ion Battery Charging (one cell) MM1333
Application circuits
1. A diode is required to prevent reverse current from the battery. 2. Even higher precision can be obtained by inserting R2 for output voltage adjustment. CEL intake current is used to adjust output voltage with R2. CEL intake current is around 3 ~ 10A. 3. Charging current can be set with R3+R4. Example : To set to 0.25A VCL/(R3+R4) = 0.1V/0.4 = 0.25A 4. Full charge detection current can be adjusted by the ratio between R3 and R4. Example : H rank VIC/(VLC R4/(R3 + R4) = 0.031V/(0.1 0.21/(0.19 + 0.21)) = 0.59 This makes the ratio between charging current and full charge detection current 1 : 0.59. Charging current was set at 0.25A in step 3 above, so full charge detection current is 0.25A 0.59 = 0.148A.
MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
5. R5 and R6 are resistors for positive feedback (hysteresis). Hysteresis is applied for the amount of R5 voltage drop, and should be set below (about 1/3) full charge voltage. Also, at this time, full charge detection voltage changes by the amount of R5 voltage drop. Example : Setting full charge detection current using H rank and taking hysteresis voltage into account. Setting conditions : charge current 0.25A (R3 + R4=0.4), full charge current 0.1A, MPU power supply 5V, full charge hysteresis 10mV Full charge current is set by comparing the reference voltage (VIC=0.031V) and CS2 pin voltage (V2) inside the IC. An example of calculation for setting full charge current at 0.1A is shown below. (V2-V1)+IBATT R4=0.031V Here, V2-V1 (potential at ends of R5) is the hysteresis. In order to set hysteresis at 10mV, find R4 as follows. R4=(0.031V-(V2-V1)/IBATT=(0.031V-0.01V)/0.1A = 0.21 From R3 + R4 = 0.4, R3 = 0.4-0.21 = 0.19. Hysteresis Setting (R5 ~ R7) The current values that flow on R5~R7 from 3V are minute due to the high impedance of the CS2 pin, and so do not cause a problem. (It is assumed that the effects of noise, etc. must be considered for each individual set.) Here the setting is for 10A. CO is low level during full charge detection, so V2-V1 = 0V. When V2-V1 is set to 10mV during charging (CO high), then R5 + R6 + R7 = 3V/10A = 300kW. (R4 is extremely small as compared to R5~R7 and thus is ignored.) 3V : 0.01V=(R5 + R6 + R7) : R5 From the above equation, R5 = 1k, R6 + R7 = 299k, and R6 and R7 resistance values must be set so that CS1 can be low level. If CS1 sink current is 0.15mA, then R7 = 3V/0.15mA=20k, R6=299k-20k = 279k. Therefore, R3 = 0.19, R4 = 0.21, R5 = 1k, R6 = 279k, R7 = 20k. Please note that the above figures are examples given for reference purposes, and should be used in actual practice only after sufficient examination.
MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
Characteristics
Output voltage vs ambient temperature (VCC=5V, Output voltage 4.1V)
4.15 4.14 4.13 4.12 4.11 4.1 4.09 4.08 4.07 4.06 4.05 -25
Output voltage vs power supply voltage (Ta=25C, Output voltage 4.1V)
4.15 4.14 4.13 4.12 4.11 4.1 4.09 4.08 4.07 4.06 4.05
Output voltage (V)
0
25
50
75
Output voltage (V)
5 6 7 8 9 10 11 12 13 14 15 16 17 18
Ambient temperature (C)
Power supply voltage (V)
Charging (VCC=5V, Output voltage 4.1V)
Power supply voltage V (V)
4.5 4.4 4.3 4.2 4.1 4 3.9 3.8 3.7 3.6 3.5 0 0.5 1 1.5 2 2.5 3
H-rank full charge detection voltage [mV]
H-rank full charge detection voltage (mV)
35
30
Charging time (h)
25 -25 25 75 85
Ambient temperature (C)
D-rank full charge detection voltage [mV]
D-rank full charge detection voltage (mV)
25
H-rank output voltage [V]
4.15
H-rank output voltage (V)
4.10
20
4.05 15 -25 25 75 85
0
5
10
15
20
Ambient temperature (C)
Power supply voltage (V)
MITSUMI
Control for Lithium Ion Battery Charging (one cell) MM1333
D-rank output voltage [V]
4.25
Low-voltage detection voltage [V]
Low-voltage detection voltage (V)
2.1
D-rank output voltage(V)
4.20
2.0
4.18
4.15 0 5 10 15 20
1.9
-25
25
75 85
Power supply voltage (V)
Ambient temperature (C)
CS1 pin voltage [V]
110
H-rank output voltage [V]
4.15
100
H-rank output voltage(V)
-25 25 75 85
CS1 pin voltage (mV)
4.10
90
4.05
-25
25
75 85
Ambient temperature (C)
Ambient temperature (C)
D-rank output voltage [V]
4.25
D-rank output voltage(V)
4.20
4.15
-25
25
75 85
Ambient temperature (C)

▲Up To Search▲

Price & Availability of MM1333

	To Download MM1333 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .