Mitsubishi M62240FP Datasheet

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.

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

PIN CONFIGURATION (TOP VIEW)

ISET2

Vref1

LED

Rc
Cc

ChgSW

GND

BattSW

VTRSW

TEST

1
2
3

M62240FP

4
5
6
7
8
9

10 11

20
19
18
17
16
15
14
13
12

ISET1
OC SET
IDET

Vcc
VDET
P.C
Batt T
Vref2
Batt ­Batt +

Outline 20P2N-A

APPLICATION

Battery charger for video cameras and handheld
telephones, etc.

BLOCK DIAGRAM

Vcc VDET IDET

17 13 16 18

SYSTEM
RESET CHT.

15

P.C

ISET1

20

ISET2

1

7

GND

Vref1

Vref2

2

STABLED
PWR. SUP.

VOLTAGE
SET-UP CKT.

CURRENT
SET-UP CKT.

OSCILLATOR

CLOCK
GEN. CKT.

4 5

Rc Test

Cc

LED
DRIVER

TEST
CKT.

10 19

OCSET

LED

ChgSW

63

OUTPUT
SW DRIVER

CONTROL LOGIC

OVER-CURRENT
DET. CKT.

-∆V ERROR DET.
PREV. LOGIC

BATTERY TEMP
DET. CKT

BATT. VOLTAGE
DET. CKT.

BattSW

8

VTRSW

9

Batt T

14

Batt +

11

Batt -

12

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EXPLANATION OF TERMINALS

MITSUBISHI Dig./Ana.INTERFACE

M62240FP

SINGLE CHIP BATTERY CHARGER CONTROL IC

Pin No. Symbol

3 LED

4, 5 Rc, Cc

6 Chg SW
7

8 Batt SW
9 VTR SW

10
11

12 Batt -

14
13 Vref2

15

GND

Test

Batt +

Batt T

P.C

Function

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)

16

18
19 OC SET Setting the over-current detection value in the adapter mode.

20, 1

2 Vref1

17

V

DET

I

DET

Iset1, 2

Vcc

Monitoring the output voltage.
Detecting the charging current or output current.

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.

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