MITSUBISHI Dig./Ana.INTERFACE
M62240FP
SINGLE CHIP BATTERY CHARGER CONTROL IC
GENERAL DESCRIPTION
The M62240FP is a general purpose battery charger control IC.
It can control all of the sequence needed for battery charging, it
also has functions such as detection of battery temperature, a
protection against over-current/voltage, a safety timer and so on.
Moreover, it can adapt to charge Ni-Cd, Ni-MH batteries by adding
few peripheral components.
The IC has the feedback control of the charge current and output
voltage.
PIN CONFIGURATION (TOP VIEW)
I
SET2
1
Vref1
2
LED
3
Rc
4
Cc
5
ChgSW
6
GND
7
BattSW
8
VTRSW
9
TEST 10
20 I
SET1
19 OC SET
18 I
DET
M62240FP
17 Vcc
16 V
DET
15 P.C
14 Batt T
13 Vref2
12 Batt -
11 Batt +
FEATURES
• Low voltage (3V) operation
• Built-in following functions and circuits ;
• CR oscillator for internal logic
• Initialization timer and safety timer for
∆V
error detection and
over-charging
• D-A converter and shift registers to maintain the peak voltage
of battery.
• Main output SW driving circuits
• LED driving circuit for displaying the status of the charging
• System reset circuit for detecting the power supply voltage
• Temperature detection circuit for the Ni-MH battery
• Voltage and current control circuits for feedback to the primary
side of the SMPS.
• Protective functions including detection of over-voltage in
charge mode and over-current in adapter mode and so on
Outline 20P2N-A
APPLICATION
Battery charger for video cameras and handheld
telephones, etc.
BLOCK DIAGRAM
Vcc
17
SYSTEM
RESET CHT.
Vref1 Vref2
2
13
STABLED
PWR. SUP.
V
DET
I
DET
16
18
LED
3
LED
DRIVER
ChgSW
6
OUTPUT
SW DRIVER
P.C
15
VOLTAGE
SET-UP CKT.
8 BattSW
CONTROL LOGIC
9 VTRSW
CURRENT
SET-UP CKT.
I
SET
1
20
I
SET
2 1
OSCILLATOR
CLOCK
GEN. CKT.
OVER-CURRENT
DET. CKT.
BATTERY TEMP
DET. CKT
14
Batt T
11
Batt +
12
Batt -
-∆V ERROR DET.
PREV. LOGIC
BATT. VOLTAGE
DET. CKT.
TEST
CKT.
7
GND
4
Rc
5
Cc
10
19
Test OCSET
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9703
MITSUBISHI Dig./Ana.INTERFACE
M62240FP
SINGLE CHIP BATTERY CHARGER CONTROL IC
EXPLANATION OF TERMINALS
Pin No.
3
4, 5
6
7
8
9
10
11
12
14
13
15
16
18
19
20, 1
2
17
Symbol
LED
Rc, Cc
Chg SW
GND
Batt SW
VTR SW
Test
Batt +
Batt -
Batt T
Vref2
P.C
V DET
I DET
OC SET
Iset1, 2
Vref1
Vcc
LED drive (Open collector outputs)
Setting the oscillating frequency of the internal clocks.
The SW drive terminal used for charging battery. (Open collector outputs)
Ground
Checking whether a bettery is mounted or not. (It has a pull-up resistor)
Detecting VTR connection. (It has a pull-up resistor)
Test mode set-up. (It has a pull-up resistor)
This is connected to the + terminal of the battery.
This is connected to the - terminal of the battery.
This is connected to the the temperature detecting terminal of the battery.
The voltage reference terminal for temperature detection.
This is connected to the photo-coupler used for feedback. (It has a pull-up resistor)
Monitoring the output voltage.
Detecting the charging current or output current.
Setting the over-current detection value in the adapter mode.
These are used to the charging current. (Iset1 is for quick charge and Iset2 is for trickle charge)
Setting the standard voltage for over-current set-up value and the charge current set-up.
Power supply.
Function
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9703
MITSUBISHI Dig./Ana.INTERFACE
M62240FP
SINGLE CHIP BATTERY CHARGER CONTROL IC
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C, unless otherwise noted)
Symbol
Parameter
Supply voltage
Conditions
Ratings
Unit
Vcc
16
50
20
20
-0.5
-1
650
Ta=25°C
Ta>25°C
6.5
-20 to +75
-40 to +125
V
mA
mA
mA
mA
mA
mW
mW/°C
°C
°C
I
ChgSW
ChgSW terminal drive current
I
LED
I
P.C
Iref1
Iref2
Pd
K
Topr
Tstg
LED drive current
P.C drive current
Vref1 output current
Vref2 output current
Power dissipation
Thermal derating
Operating temperature
Storage temperature
Note
Polarity of current:
The direction of current flowing into the IC is equivalent to the positive (+).
The direction of current flowing out of the IC is equivalent to the negative (-).
The voltage applied to the open collector output terminal should be less than the
absolute maximum voltage of the power supply.
The voltage difference between the negative terminal of the battery and the GND
terminal should be 0 to 0.6V.
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9703
MITSUBISHI Dig./Ana.INTERFACE
M62240FP
SINGLE CHIP BATTERY CHARGER CONTROL IC
ELECTRICAL CHARACTERISTICS
(Vcc=7V,Ta=25°C,unless otherwise noted)
All device
Symbol
Vcc
Icc
Parameter
Supply voltage
Circuit current
Vcc=7V when quick charge
Test conditions
Min
3.0
10.0
2.70
20.0
2.80
Limits
Typ
Max
15.0
30.0
2.90
Unit
V
mA
V
V
THVCC
Power supply detecting voltage
Reference
Symbol
Vref1
Vref2
Symbol
I
OCSET
I
SET1-1
I
SET1-2
I
SET2-1
I
SET2-2
Parameter
Vref1 output voltage
Vref2 output voltage
Test conditions
Iref1=150µA
Iref2=350µA
Test conditions
V
OCSET
=220mV
Excluding charging time
When charging
Excluding trickle charging time
When trickle charging
Limits
Min
Typ
1.21
1.25
1.73
1.80
Limits
Typ
50
50
Max
1.30
1.87
Unit
V
V
Unit
µA
Parameter
OCSET terminal flow out current
I
SET1
terminal flow out current 1
I
SET1
terminal flow out current 2
I
SET2
terminal flow out current 1
I
SET2
terminal flow out current 2
Min
-1
30
-1
30
-1
Max
85
85
µA
µA
µA
µA
Driver
Symbol
V
satChgSW
V
satLED
Parameter
ChgSW terminal output flow out current
Test conditions
I
ChgSW
=30mA
I
LED
=10mA
Min
Limits
Typ
0.3
0.3
Max
0.6
0.6
Unit
V
V
LED output low voltage
Control Section
Symbol
V
IN
I
Bias
V
PCL
Parameter
Range of input voltage
Input bias current
P.C output low voltage
Test conditions
Min
0
-1
Limits
Typ
Max
Vcc
Unit
V
µA
V
I
P.C
=10mA
0.3
0.6
Each SW Detection Terminal
Symbol
I
BattSW
Parameter
Batt SW terminal flow out current
Test conditions
Vcc=7V,V
BattSW
=0V
Vcc=7V
Vcc=7V,V
VTRSW
=0V
Vcc=7V
Limits
Min
Typ
-240 -140
3.0
-240
3.0
4.0
-140
4.0
Max
-80
5.0
-80
5.0
Unit
µA
V
µA
V
V
THBatt
Batt SW terminal threshold voltage
I
VTRSW
VTR SW terminal flow out current
V
THVTR
VTR SW terminal threshold voltage
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9703
MITSUBISHI Dig./Ana.INTERFACE
M62240FP
SINGLE CHIP BATTERY CHARGER CONTROL IC
Internal Voltage Set-up
Symbol
V
VTR
V
CHG
Parameter
Set-up output voltage at VTR mode
Set-up output voltage at charge mode
When quick charging
When trickle charging
When VTR mode
Test conditions
Min
828
1.21
124.8
11.52
211.2
0.40
0.91
70
0.91
0.82
Limits
Typ
864
1.26
130
12.0
220
0.54
0.95
100
0.97
0.86
Max
900
1.30
135.2
12.48
228.8
0.68
0.99
130
1.01
0.90
Unit
mV
V
mV
mV
mV
V
V
mV
V
V
V
ISET1
Iset1 set-up voltage
V
ISET2
Iset2 set-up voltage
V
OCSET
OCSET set-up voltage
V
CHG
V
OVP
V
-
∆V
V
O/H
Voltage at the start of quick charging
Over-voltage set-up voltage
-∆V detection set-up voltage
after initialization timer has passed
V
VTHH1
Temperature detection set-up voltage
Temperature at the start of charging
Over-heating detection set-up voltage Charge stop temperature
Internal Voltage Set-up
Symbol
fosc
Tm1
Tm2
Tms1
Tms2
Toc
Parameter
Oscillation frequency
Initialization timer 1
Initialization timer 2
Safety timer 1
Safety timer 2
Over-current detection time
Test conditions
Rc=30KΩ,Cc=2200pF
Battery voltage < 5V
Battery voltage
≥
5V
When quick charging
When trickle charging
When VTR mode
Min
9.42
18.4
4.6
4.6
4.6
9.2
Limits
Typ
20.0
5.0
5.0
5.0
10.0
Max
21.6
5.4
5.4
5.4
10.8
Unit
KHz
min
min
hr
hr
sec
10.24 11.06
Note:
Each timer is set at an oscillation frequency of 10.24KHz.
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