REJ03F0239-0200 Rev.2.00 Sep 14, 2007

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M62240FP

Single Chip Battery Charger Control IC

REJ03F0239-0200

Rev.2.00

Sep 14, 2007

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 (3 V) 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

Application

Battery charger for video cameras and handheld telephones, etc.

Block Diagram

P.C

20

1

710

19

GND

45

Rc

Cc

TEST OC SET

12

11

14

9

8

6

3

18

16

13

2

17

SYSTEM

RESET CHT.

STABLED

PWR. SUP.

LED

DRIVER

OUTPUT

SW DRIVER

Batt SW

VTR SW

Batt T

Batt

−

BATTERY TEMP

DET. CKT.

BATT. VOLTAGE

DET. CKT.

OVER-CURRENT

DET. CKT.

−∆V ERROR DET.

PREV. LOGIC

OSCILLATOR

CLOCK

GEN. CKT.

TEST

CKT.

VOLTAGE

SET-UP CKT.

CURRENT

SET-UP CKT.

Vref1 Vref2

LED

Chg SW

15

CONTROL LOGIC

+

−

+

−