Datasheet M62255FP Datasheet (Mitsubishi)

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GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Notice: This is not a final specification. Some parametric limits are subject to change.

DESCRIPTION

The M62255FP is intended to be used a general purpose battery charger control for Note PC. The M62255FP contains the functions which are required for the battery charge control ,on single chip using low peripheral component requirement . The M62255FP can handle battery charge control, monitor battery temperature and prevent from over current and voltage with microcomputer. It contains DC-DC converter circuit which can be used for the feedback control of the charge current and the output voltage.

It is the best fit for Smart Battery Charger.

FEATURES

•Built-in 3 wire serial data interface for MCU.

•Built-in multiplexer and level magnification circuit with 4 input ports.

•Built-in DC-DC converter circuit for PWM function

•Built-in two current detection circuits. These circuits can detect charge current and discharge current

•ON/OFF control with low power dissipation mode. (Power save)

MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

PIN CONFIGURATION (TOP VIEW)

SW

PGND

OSC GND

PS

CK

DI

CS

DCDOUT

REF IN

ADJ

Vcc

1 2 3 4 5 6 7 8

9 10 11 12

M62255FP

24P2Q-A

24 23

22

21

20 19 18

17 16 15 14

13

Vc VDET

IDET

ISENSE1 - ISENSE1 +

IN1 IN2

IN3 IN4

DOUT

ISENSE2 - ISENSE2 +

APPLICATION

Note.P.C, Video camera and general battery charger for other digital equipment

BLOCK DIAGRAM

Vcc

ADJ

REF IN

OSC

PGND

GND

SW

Output Drive circuit

PWM Comp

OSC

To Internal Circuit

Power Save

Vc

Voltage control OPAmp

IDET

Current control OPAmp

Vref

8bit

D-A Converter

Logic Circuit

ISENSE2 -ISENSE2 +

Discharge Current Detect Circuit

Vref

3bit

Vref

4bit

DCDOUT

Charge Current Detect Circuit

Output Voltage Detect Circuit

Multiplexer & Level Magnification Circuit

ISENSE1 + ISENSE1 -

VDET

IN1 IN2

IN3 IN4

PS

CK DI DOUT

CS

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MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Pin No. Symbol

7 6

8

15 11 10 19 18 17 16 20 21 13 14

9

DI

CK CS

DOUT

ADJ

REF IN

IN1 IN2

IN3 IN4

ISENSE1+

ISENSE1-

ISENSE2+

ISENSE2-

DCDOUT

Function

The serial data input pin which used to receive 8-Bit wide serial data

The shift clock input pin which input signal from DI pin to 8-Bit shift register by the rising edge of clock signal

When this pin is "Low", DI pin can receive the data into the 8-Bit shift register. The each bit will be latched at rising edge of the clock signal

The output pin of the amplified A-D data The voltage output pin for adjusting A-D reference voltage

The reference voltage input pin of the A-D converter The A-D converter input pin

The A-D converter input pin The A-D converter input pin

The A-D converter input pin The charge current sense input pin for high side voltage The charge current sense input pin for low side voltage The discharge current sense input pin for high side voltage The discharge current sense input pin for low side voltage The discharge current detect circuit output pin

23 22

24

1 3

5

12

4 3

VDET

IDET

VC

SW

OSC

PS

Vcc

GND

PGND

The voltage detection input pin The current detection input pin This pin is used to make connection with capacitor and resistor which

are used for phase compensation The pre-drive pin which used to connect the external Pch Tr

The pin used to connect capacitor to determine the frequency of ocelot The control pin of power save mode (H : power save mode, L : normal mode)

The power supply pin The ground pin

The ground pin of power unit

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MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Symbol Conditions

Vcc Isw

Vsw VPS

Pd

KTHETER

Topr

Tstg

Parameter

Supply voltage SW drive current SW max. voltage PS max. voltage

Power dissipation Thermal derating ratio

Operating temperature Storage temperature

Ta=25°C Ta>25°C

THERMAL DERATING (MAXIMUM RATING)

1000

950

Ratings

28 50

Vcc

7

950

9.5

-20 – +75

-40 – +125

Unit

V

mA

V V

mW

mW/ °C

°C

800

600

400

200

POWER DISSIPATION Pd (mW)

0

0 25 50 75 100 125

AMBIENT TEMPERATURE Ta (°C )

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MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

Symbol Unit

Block

Vcc Icc1

All block

Vref Input reference voltage

ISWL

PWM

VDET-IN

IDETB

VISENSE1+ VISENSE1- ISENSE1- input voltage range VISENSE2+

VISENSE2-

VCH Charge voltage of fixed voltage

Charge detection block

VICH

DNL

Supply voltage Circuit current Circuit current at power saveIcc2

Main-SW output saturation voltageVsatM

SW output leak current VDET input voltage range VDET input bias current ISENSE1+ input voltage range

ISENSE2+ input voltage range ISENSE2- input voltage range

Charge current detection voltage of fixed current

Differential nonlinearity at 8 bit DAC

PS input voltage VPS=2.0v

Isw=50mA

Vref=5.0v, Voltage control data is 4.2v selected at Reset

Vref=5.0v, Current control data is 160mV selected

Vref=5.0v

(Ta=25°C, Vcc=15V)

Test conditionParameter

Limits

Min

Typ Max

7.5

4.0

7.0 50

5.0

0.9

-1 1

0.6

-1

2.0

Vcc-0.5 Vcc-0.5

Vcc+1.5 Vcc+1.5

4.20 160

-1

22

10.0 80

1.2

5.0

0

4.224.18

180140

1 LSB

V

mA

µA

V V

µA

µA µA

V

V V

mV

VIN-IN IIN

Level Mag.

VDOUT fosc

Ioscch Ioscdis

OSC

TDUTY Maxmum ON duty Vosch Voscl V DIH V DIL V CSH V CSL

IN input voltage range IN input current

DOUT output voltage range Oscillation frequency Oscillation charge current Oscillation discharge current

Oscillation output high level Oscillation output low level DI input high level DI input low level CS input high level CS input low level

V CKH CK input high level

Inter Face

V CKL CK input low level

V PSH V PSL

PS input high level

PS input low level

Cosc = 390pF

0.3

-100

0.5 70 130

-150

100

-120

20 30 40

95

0.85

0.35

0.95

0.4

1.05

0.45

3.5

0

3.5

0

3.5

0

1.0

1.5 V

0

5 0 5

KHz

-90

6.0

0.5

6.0

0.5

6.0

0.5

0.3 V

V

nA

V

µA µA

%

V V V V V V V V

4

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MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

MSB LSB

DI CK

CS

D7 D6 D5 D4 D3 D2 D1 D0

ADDRESS DECODER

6

MPX MPX MPX MPX MPX MPX

CURRENT CONTROL SW

8-BIT SHIFT RESISTER

LATCH LATCH LATCH LATCHLATCHLATCH

VOLTAGE CONTROL SW

VOLTAGE Fine CONTROL SW

AMP SELECT

INPUT SELECT

4

A-D REFERENCE SELECT

<DATA TIMING CHART > (MODEL)

DI

CK

LSB

D0 D1 D2 D3 D4 D5 D6 D7

MSB

FirstLast

CS

Control function

RESET Current control Voltage control Voltage fine control Amp. select A-D Input select A-D Reference select

Address Data

D6 D5 D4 D3 D2 D1 D0

D7

0

-

0

1

-

0

1

0

-

0

1

-

0

1

0

-

0

1

0

1

-

0

1

0

-

Description

A-D Reference voltage = 2.5V

-

- -

Voltage control setting = 4.2V

-

Voltage fine control setting = 0V Current control setting = 20mV

See Table 1

-

See Table 2

-

See Table 3

-

See Table 4

-

See Table 5 See Table 6

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Table 1 ; Current control data

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MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

D3 D2

0 0 0 0 0 0 0 0

• 20mV selected at RESET

0 0 0 0 1 1 1 1

Table 2 ;Voltage control data

0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1

• 4.20V selected at RESET

0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1

0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1

D1 D0 Current control input voltage

0 0 1 1 0 0 1 1

0 1 0 1 0 1 0

0V 20mV 40mV 80mV

160mV 240mV 320mV

1

Table 3 ;Voltage fine control data

D3 D2 D1 D0D3 D2 D1 D0 Ref.voltage

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

select 5.0V select 4.84V select 4.68V select 4.52V select 4.36V select 4.20V select 4.04V select 3.88V select 3.72V select 3.56V select 3.40V select 3.24V select 3.08V select 2.92V select 2.76V select 2.60V

0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1

• 0V selected at RESET

0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1

Current ratio

0 1/16 1/8

1/4 1/2

3/4

1

Trickle

0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

fine cntl.voltage

select 0V select -10mV select -20mV select -30mV select -40mV select -50mV select -60mV select -70mV select -80mV select -90mV

select -100mV select -110mV select -120mV select -130mV select -140mV select -150mV

• Set-up voltage of Voltage control is fixed by Ref. voltage (at Table2) and fine cntl. voltage (at Table3). Set-up voltage of Voltage control can be fixed at 10mV step between 2.45V and 5.0V.

Example1.

Example2.

D3 D2 D1 D0

0 1 0 1 1 0 1 0

D3 D2 D1 D0

1 0 0 1 1 1 1 1

table 1 table 2

D3 D2 D1 D0

Set-up voltage;

4.20V(Ref. voltage) - 100mV(fine cntl. voltage) = 4.10V

table 1 table 2

D3 D2 D1 D0

Set-up voltage;

3.56V(Ref. voltage) - 150mV(fine cntl. voltage) = 3.41V

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Table 4; Amp select

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M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

0 0 0 0 1

• Output of Battery Voltage Detect Amp is selected at RESET

Table 5; A-D Input select

D3 D2

• IN1 is selected at RESET

D1 D0D3 D2

0 0 1 1 0

D1

0 0 1 1

0 1 0 1 0

D0

0 1 0 1

State

select Output of Charge Current Detect Amp

select Input of Battery Voltage Detect Amp

select Output of Battery Voltage Detect Amp

select Output of Discharge Current Detect Amp

select Output of A/D reference Voltage

State select IN1 select IN2 select IN3 select IN4

Table 6; A-D Reference voltage select

D3 D2 D1

0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1

• 2.50V is selected at RESET

0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1

0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1

D0

0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1

State

select 5.0V

select 4.69V

select 4.38V select 4.06V select 3.75V select 3.44V select 3.13V select 2.81V select 2.50V select 2.19V select 1.88V select 1.56V select 1.25V select 0.94V select 0.63V select 0.31V

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BLOCK DESCRIPTION

(1) Battery Voltage Detect BLOCK

MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

1 1

Serial Data from MCU

DI CK CS

Serial-Parallel Converter Circuit

3 1

5.0V Reference Voltage for A-D Converter

0.31V

DOUT

to A-D input of MCU

Fig.1 Block Diagram of Multiplexer and Level Magnification Circuit

x10

ISENSE2 - ISENSE2+

ISENSE1 - ISENSE1+

IN1 IN2

IN3 IN4

Multiplexer and Level Magnification Circuit of M62255 consists from Reference Voltage, 4times amplifier, 10times Amplifier and 4input Multiplexer. When setting the reference voltage correspond to detecting voltage by serial data from MCU, this set voltage supply to reference voltage for A-D converter. The difference between input voltage of IN1 - IN4 and reference voltage is multiplied by 4 at the center of this setting voltage. This multiplied voltage is supplied to A-D input of MCU from DOUT terminal. The resolution of A-D converter of MCU is improved by 2-Bit as against the difference of IN1-IN4 input.

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4.9V

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M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

3.7V

To DOUT

Output voltage of DOUT is fixed as follows; VDOUT = (VIN - Vref) x 4 + Vref (V) ---------------- (1) VDout ; Output voltage of DOUT VIN ; Voltage of IN1 (or IN2,IN3,IN4) Vref ; Reference voltage for A-D converter

In Fig.2 Reference Voltage is 2.5V. When Input voltage of IN1 (or IN2,IN3,IN4) is set at

2.8V, the difference between input voltage and Reference Voltage is 0.3V. The difference voltage (0.3V) multiplied by 4 is 1.2V. 1.2V added to Reference Voltage(2.5V) makes

3.7V which is output voltage of VDOUT. The range of output voltage of VDOUT is between 0V and 5V. So in Fig.2 the range of input voltage of IN1(or IN2,IN3,IN4) is between 1.9V and 3.1V. (This range of input voltage is difference from selected Reference Voltage.)

2.5V

1.3V

0.1V

1.2V

0.3V

4times Amplifier

Fig.2 Description of Level Magnification

3.1V

2.8V

2.5V

2.2V

1.9V

input voltage

Reference Voltage

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Charge Current of Current Detect R is multiplied by 10 and outputted from DOUT. M62255 is for the floating detection type. Current Detect R is connected to + terminal

of battery.So M62255 is best fit for SMBus system ,because the common GND can be given between PC system and the charger circuit.

Discharge current is detected by the same method as charge current.Detecting discharge current can be used for monitoring the current consumption and the remnant of the battery.

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M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

To 10times Amplifier

To 4times Amplifier

Fig.3 Detector Circuit of Battery Voltage / Charge Current

Current

Detect

Circuit

Multiplexer

Circuit

ISENSE+

ISENSE -

IN1 - N4

Charge Current Detect R

Battery

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DchgSW

From MCU

MITSUBISHI<Dig./Ana. INTERFACE>

M62255FP

GENERAL PURPOSE BATTERY CHARGER CONTROL IC

ChgSW

600K

0.1

22µ

200K

0.022µ

100µ

0.1µ

Battery 1

VC

IDET

ISENSE1-

ISENSE1+

Battery 2

IN1

VDET

Battery 3

From

each

Battery

IN3

IN2

IN4

DOUT

CS

Battery 4

To MCU

3

SW A

100

0.1

TO System

AC

Adaptor

300

SW

ISENSE2+

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ISENSE2-

Vcc

M62255

REF IN

5V

Reg

OSC

390p

PGND

CK DI

PS

GND

150K

From MCU

Normal

5v

PS

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PACKAGE OUTLINE

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GENERAL PURPOSE BATTERY CHARGER CONTROL IC

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