M62240FP Datasheet, PDF (1/6 Pages) Mitsubishi Electric Semiconductor – SINGLE CHIP BATTERY CHARGER CONTROL IC

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 ₁
Vref1 ₂
LED ₃
Rc ₄
Cc ₅
ChgSW ₆
GND ₇
BattSW ₈
VTRSW ₉
TEST 10
20 ISET1
19 OC SET
18 IDET
17 Vcc
16 VDET
15 P.C
14 Batt T
13 Vref2
12 Batt -
11 Batt +
Outline 20P2N-A
APPLICATION
Battery charger for video cameras and handheld
telephones, etc.
BLOCK DIAGRAM
Vcc Vref1 Vref2 VDET IDET
17
2 13
16 18
SYSTEM
STABLED
RESET CHT. PWR. SUP.
LED
3
LED
DRIVER
ChgSW
6
OUTPUT
SW DRIVER
P.C 15
ISET1 20
ISET2 1
7
GND
VOLTAGE
SET-UP CKT.
CONTROL LOGIC
8 BattSW
9 VTRSW
CURRENT
SET-UP CKT.
Batt T ^{OVER-CURRENT BATTERY TEMP}
DET. CKT.
DET. CKT
14
OSCILLATOR
CLOCK
GEN. CKT.
TEST
CKT.
Batt + ^{-∆V ERROR DET. BATT. VOLTAGE}
PREV. LOGIC
DET. CKT.
11
12 Batt -
45
Rc Cc
10 19
Test OCSET
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