M62256FP Datasheet, PDF (1/11 Pages) Mitsubishi Electric Semiconductor – Single chip battery charger control IC

M62256FP
Single Chip Battery Charger Control IC
REJ03F0246-0200
Rev.2.00
Jun 16, 2008
Description
M62256FP is a semiconductor integrated circuit designed to control the battery charger. This IC controls not only all
the time sequence needed for battery charging, but also gives full support for detection of battery temperature,
protection over current and voltage, and safety timer, etc. It is also a simple matter to charge Ni-Cd, Ni-MH batteries by
adding a small peripheral components to this IC.
This IC has a feedback controlling of the charge current and the output voltage.
Features
• Designed for low voltage (3 V) operation.
• Built-in CR oscillator is used for internal logic.
• Built-in initialization timer and safety timer enable –∆V error detection and over-charging.
• Built-in D/A converter and shift-resister circuits to maintain the peak voltage of battery.
• Built-in main output SW and discharge drive circuits.
• Built-in LED drive circuits for displaying the status of the power supply and charging/discharging.
• Built-in system reset circuit for detecting the power supply voltage.
• Built-in temperature detection circuit for the Ni-MH battery.
• Built-in voltage and current control circuit which enables feedback to the primary side of the SMPS.
• Built-in protective functions including detection of over-voltage in charge mode and over-current in adapter mode,
and others.
Applications
General electronic battery charger for VCR and camera in one unit, mobile phone, etc.
Block Diagram
Vcc
Vref2 Vref1 Iset2 Iset1 C1 C2 C3 E1 E2 E3 Chg SW Dchg OUT Dchg IN IDET
28
22 36
35
34
13 52 46
11
10
9
29
P.C 24
V_DET 25
CP2 26
Stabl'd
Pwr. Sup.
System
Reset ckt.
to internal
circuit
to internal
circuit
Detect un-
plugged PS cord
Voltage
control
OP-amp.
Voltage
set-up ckt.
LED driver
Output SW Discharge
driver
driver
Discharge
current control
Control logic
14 Dchg SW
13 Batt SW
15 Adpt SW
CP1 30
PCS IN 31
PCS OUT 32
Current
set-up ckt.
Current
control
OP-amp.
Safety
timer
Oscillator
Clock
gen. ckt.
Test ckt.
Over-current
det. ckt.
−∆V error det.
prev. logic
Battery temp
det. ckt.
Batt. voltage
det. ckt.
−∆V det.
logic
23 Batt T
20 Batt +
21 Batt −
12
GND2
(A.GND)
78
Rc Cc
16 17
33
27
Test1 Test2 OCSET GND1
(P.GND)
REJ03F0246-0200 Rev.2.00 Jun 16, 2008
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