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M62242FP
Lithium-Ion Battery Charger Control IC
REJ03F0241-0200 Rev.2.00 Sep 14, 2007
Description
M62242FP is general purpose battery charger designed for 1-2 cell lithium-ion batteries. Integrating the indispensable circuits for charge control and the interface with MCU *1 allows for protections against over-temperature, over-current, and over-voltage as well as charge control corresponding to the kind of battery by the simplified component design. Note: 1. Recommended MCU: M34501
Features
* Built-in accurate reference voltage for full charge detection (4.2 V 30 mV accuracy, prepared for 4.1 V battery voltage) * Built-in 5 V power supply for MCU * Using with MCU, various charge flow are available. * Small size 16-pin SSOP package
Application
Hand held equipments and general battery charger for other digital equipments, etc.
Block Diagram
OUT 16 VCC 4 Constant current control Charge ON/OFF
SD
1
- +
Aamp
+ -
14 13 12
HBAT LBAT VDIF VSENSE
- +
Constant voltage control Bbuff
+ -
11
VBAT
5
Cbuff +
DATA
6
+ + -
10
TYPE
9
TH
REF
3
5.0 V
Reg 15 Logic GND
CADJ
2
7 S1 8 S2
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 1 of 8
M62242FP
Pin Arrangement
M62242FP
SD CADJ REF VCC VBAT DATA S1
S2
1
16 OUT
15 GND
14 HBAT
13 LBAT
12 VDIF
11 VSENSE
10 TYPE
9
(Top view)
2
3
4
5
6
7
8
TH
Outline: PLSP0016JA-A (16P2E-A)
Pin Description
Pin No. 1 2 Pin Name SD CADJ I/O I I Function Charge ON/OFF pin. L: charge on, H: charge off Charge current set pin. Charge current depends on CADJ-pin voltage. For example, * Setting current detection resistance (Rs) = 0.1 * Amplification rate determined by the external resistances = 20 times * CADJ-pin voltage = 1.62 V yields Charge current = 600 mA (1.62 - 0.42 (offset) = 0.1 x Charge current x 20) Reference voltage output pin. REF-pin outputs 5.0 V reference voltage for MCU and other detector. Power supply. Battery voltage output pin. Select pin of DATA output. The output of DATA-pin depends on the conditions of S1, S2-pin. (Noted right figure)
Input S1 S2 L H H L Other Output DATA TYPE TH VDIF
3 4 5 6 7 8 9 10
REF VCC VBAT DATA S1 S2 TH TYPE
O -- O I I O I I
Pin name Condition
11
VSENSE
I
12 13 14 15 16
VDIF LBAT HBAT GND OUT
O I I -- O
Battery temperature input pin. Reference voltage divided by external resistance and thermistor is input to TH-pin. Input pin detecting the kind of battery. Reference voltage divided by resistance detecting the kind of battery and external resistance is input to TYPE-pin. Battery voltage input pin. Charge voltage is controlled by the comparison between half of VSENSE-pin voltage and 2.1 V (inside reference voltage). Charge current detection pin. Amplified differential voltage, between the current detection resistor (Rs), with the amplification ratio set by the external resistor between HBAT and LBAT is output to VDIF terminal. Charge current is controlled by the comparison of VDIF-pin voltage and CADJ-pin voltage. Ground pin Output pin for charge control. Constant voltage/current charge is done by controlling the gate voltage of external PchTr (PNP-Tr).
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 2 of 8
M62242FP
Absolute Maximum Ratings
(Ta = 25C, VCC = 8 V, unless otherwise noted)
Item Supply voltage Power dissipation * Operating temperature Storage temperature OUT pin driving current REF pin output current Note:
1
Symbol Vmax Pd Topr Tstg Idout Iref
Ratings 16.0 590 -20 to +75 -40 to +125 50.0 10.0
Unit V mW C C mA mA
1. This is in the typical condition. (the velocity of the wind is 1 m/s) Power dissipation is changed by materials of the assembled board and the velocity of the wind.
Electrical Characteristics
(Ta = 25C, VCC = 8 V, unless otherwise noted)
Block Total Item Power supply Circuit current (normal mode) REF-pin referential voltage Charge control voltage Aamp VDIF-pin output offset voltage H, LBAT-pin input bias current VDIF-pin output dynamic range VBAT-pin input offset voltage VSENSE-pin input bias current VBAT-pin output dynamic range Cbuff DATA-pin input offset voltage TYPE, TH, VDIF-pin Input bias current DATA-pin output dynamic range S1, S2 "H" voltage S1, S2 "L" voltage OUT-pin output low voltage Symbol VCC ICC Vref Vchg Vdifo IhIb Vdifdr Vbato Ivsenseb Vbatdr Vdatao Ittvb Vdatadr Vlogich Vlogicl Vout Min 5.3 1.0 4.88 4.17 (4.07) -- -- 0.3 -5 -- 1.0 -5 -- 0.3 1.0 0 -- Typ -- 2.0 5.00 4.20 (4.10) 460 200 -- 0 -50 -- 0 50 -- -- -- -- Max 15.0 3.0 5.12 4.23 (4.13) -- 400 VCC - 0.3 5 -100 VCC - 0.3 5 100 VCC - 1.0 REF 0.5 0.6 Unit V mA V V mV nA V mV nA V mV nA V V V V Same voltage when S1, S2-pin are open. Iout = 30 mA Iout = 5 mA 4.2 V battery (4.1 V battery) Set at 20 times Notes
Bbuff
Logic
Out
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 3 of 8
M62242FP
Functional Description
(Each voltage written in following are set in application example) The value of each timer, over-voltage, low-voltage, over-current and charge full-current etc, are set by MCU. 1. Function of Charging (SD = "L") (1) Detection of the battery connection/the battery temperature. When (S1, S2) = (H, L), TH-pin voltage is output from DATA-pin. TH-pin voltage is used for the detection of the battery connection and battery temperature. MCU recognizes the battery connection and the battery temperature. (Noted table 1.) (2) Detection of the battery type TYPE-pin voltage is detected to recognize a battery type. When (S1, S2) = (L, H), TYPE-pin voltage is output from DATA-pin. The recognition of the battery type by MCU selects the suitable charge flow. (Noted table 1.) Table 1 S1, S2, DATA Function
Input Pin name Condition S1 L H other Note: S2 H L Output DATA TYPE TH VDIF
DATA outputs 50 s after S1 and S2 input
(3) Detection of battery voltage Since VSENSE-pin voltage (the battery voltage) is always output to VBAT-pin, MCU can always detect the battery voltage. (4) Set and control of the charge current This IC performs the constant charge current function to make CADJ-pin voltage equal to the value. 0.1 x charge current x 20 + offset voltage Detecting the offset voltage by MCU after connecting a battery and revising give highly accurate minute current detection. By changing CADJ-pin voltage after detecting the type, the temperature and the voltage of battery by MCU, the charge current can be set arbitrary. Notes: 0.1 : current detection resistance Rs 20: Amplification rate determined by external resistances connected to HBAT and LBAT-pin (5) Control of charge voltage Charge voltage is controlled by the comparison between the battery voltage and inside reference voltage. (6) The charge completion DATA-pin outputs VDIF-pin voltage (which corresponds to charge current) when (S1, S2) = (L, L) or (H, H). If DATA-pin voltage drops below the charge completion voltage, MCU stops charging. (7) Function of protect In the following condition, MCU stops charging for battery protection by monitoring the VBAT-pin and the DATApin voltage. Example Battery voltage is less than 1.0 V (Low-voltage NG) Battery voltage is more than 4.5 V (Over-voltage NG) Charge current is more than 1.2 A (Over-current NG) Battery temperature is less than -10C and more than 60C (Temperature NG) Non-charge completion an hour after charge starts (Charge time up)
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 4 of 8
M62242FP 2. Function of Non-charge (SD = "H") In each abnormal states, charge completion state and non-battery state etc, inputting "H" voltage from MCU to SD-pin makes OUT-pin "H" and then the charge function of this IC stops.
3. Function of Recharge VBAT-pin outputs VSENSE-pin voltage continually even after the charge completion. So MCU restarts charging if VSENSE-pin voltage drops below the set voltage by self-discharge etc.
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 5 of 8
M62242FP
Flow Chart (Noted Equivalent Circuit)

START (S1, S2) = (H, L)
Condition Charge NG Completion Other LED Red LED Green on on/off off off off off on off Battery Connection / Temperature
M62242FP>
DATA TH outputs (Detection of battery connection)
No connecting
Connecting (S1, S2) = (L, H) TYPE B Battery type TYPE A DATA TYPE outputs (Detection of battery type)
(S1, S2) = (L, L)
(S1, S2) = (L, L)
DATA VDIF outputs (Offset revising)
Select resistance B (3.0 k) SD = L (Precharge start) 5 minutes timer start
Select resistance B (3.0 k) SD = L (Precharge start) 5 minutes timer start
OUT "ON" charge start 208 mA charge constant current (Precharge)
5 minutes timer L.T. 30 m No VBAT > 2.5 V Yes
Select resistance D (15 k) SD = L (Quick charge start) 1 hour timer start
5 minutes timer over 5 m over 5 m L.T. 30 m No VBAT > 3.0 V Yes
Select resistance A (12 k) SD = L (Quick charge start) 1 hour timer start
DATA Output TH/VDIF-pin by turns. (Detection of battery temperature/charge current) VBAT Output VSENSE-pin voltage (Detection of battery voltage)
208 mA 654 or 763 mA Charge current
654 mA constant current charge start (Quick charge) 763 mA constant current charge start
208 mA constant current charge (Precharge)
No 1 hour timer over 1 h L.T. 1 h No Ichg* < 70 mA Ichg* < 50 mA VSENSE-pin voltage
SD = H (charge stop) SD = H (charge stop)
1 hour timer over 1 h L.T. 1 h No
VSENSE = 4.2 V Yes 4.2 V constant current voltage start
Charge current
654 or 763 mA constant current charge (Quick charge)
OUT = "H" Charge completion Yes Time Recharge 4.2 V constant voltage charge
Yes VBAT < 3.90 V Recharge VBAT > 4.5 V or < 1.0 V, Ichg* > 1.2 A Temperature < -10C or > 60C VBAT < 3.95 V
Noted left is always NG SD = H (charge stop)
OUT = "H" Charge stop 2.5 V or 3.0 V 4.2 V
* DATA-pin outputs TYPE/TH/VDIF-pin voltage by turns. VBAT-pin always outputs VSENSE-pin voltage. * Resistance C (1.5 k) is selected to charge at 109 mA constant current when battery voltage is -10C to 0C or 50C to 60C. * Charge stops after recognizing abnormal mode when * Each detection is decided after coincidence of 3 reading every 0.1 s.
Note Ichg*: Charge current VBAT > 4.5 V, VBAT < 1.0 V, VDIF > 3.6 V (Ichg* > 1.2 A), time up, battery temperature < -10C or > 60C.
VSENSE-pin voltage
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 6 of 8
M62242FP
Equivalent Circuit
DC
10 k
OUT VCC SD
HBAT LBAT
200 k
0.1 (Rs)
10 k
VDIF AD AD
VDD
30 k A
B
A: 12 k C D B: 3.0 k C: 1.5 k
D: 15 k
200 k
VBAT DATA REF CADJ S1
VSENSE
M62242FP
TYPE TH
REF
MCU (M34501)
Rt
Rr
S2 GND
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 7 of 8
M62242FP
Package Dimensions
JEITA Package Code P-LSSOP16-4.4x5-0.65 RENESAS Code PLSP0016JA-A Previous Code 16P2E-A MASS[Typ.] 0.06g
16
9
HE
E
F
NOTE) 1. DIMENSIONS "*1" AND "*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION "*3" DOES NOT INCLUDE TRIM OFFSET.
*1
1 Index mark
8
c
A2
A1
Reference Symbol
Dimension in Millimeters
*2
D
*3
e
bp
Detail F
y
D E A2 A A1 bp c HE e y L
Nom Max 5.0 5.1 4.4 4.5 1.15 1.45 0 0.1 0.2 0.17 0.22 0.32 0.13 0.15 0.2 0 10 6.2 6.4 6.6 0.53 0.65 0.77 0.10 0.3 0.5 0.7
Min 4.9 4.3
REJ03F0241-0200 Rev.2.00 Sep 14, 2007 Page 8 of 8
A
L
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