RENESAS M62255FP

M62255FP
General Purpose Battery Charger Control IC
REJ03F0245-0200
Rev.2.00
Sep 14, 2007
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)
Application
Note.P.C, Video camera and general battery charger for other digital equipment
Block Diagram
SW
Output
drive circuit
VCC
ADJ
IDET
VC
Current
control
OP Amp
PWM
Comp
ISENSE2+
ISENSE2− DCDOUT
Discharge current
detect circuit
Charge current
detect circuit
ISENSE1+
Output voltage
detect circuit
VDET
REF IN
ISENSE1−
Vref
OSC
OSC
Voltage
control
OP Amp
Vref
To internal circuit
D/A
converter
PGND
GND
Power
save
PS
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 1 of 12
3-bit
8-bit
Logic circuit
CK
DI
CS
IN1
Vref
4-bit
Multiplexer
&
Level
magnification
circuit
DOUT
IN2
IN3
IN4
M62255FP
Pin Arrangement
M62255FP
SW
PGND
OSC
GND
PS
CK
DI
CS
DCDOUT
REF IN
ADJ
VCC
1
24 VC
2
23 VDET
3
22 IDET
4
21 ISENSE1−
5
20 ISENSE1+
6
19 IN1
7
18 IN2
8
17 IN3
9
16 IN4
10
15 DOUT
11
14 ISENSE2−
12
13 ISENSE2+
(Top view)
Outline: PRSP0024GA-A (24P2Q-A)
Pin Description
Pin No.
Pin Name
7
DI
6
CK
8
CS
Function
The serial data input pin which used to receive 8-bit wide serial data
15
DOUT
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
11
10
ADJ
REF IN
The voltage output pin for adjusting A/D reference voltage
The reference voltage input pin of the A/D converter
19
18
IN1
IN2
The A/D converter input pin
The A/D converter input pin
17
16
IN3
IN4
The A/D converter input pin
The A/D converter input pin
20
21
ISENSE1+
ISENSE1–
The charge current sense input pin for high side voltage
The charge current sense input pin for low side voltage
13
14
ISENSE2+
ISENSE2–
The discharge current sense input pin for high side voltage
The discharge current sense input pin for low side voltage
9
23
DCDOUT
VDET
The discharge current detect circuit output pin
The voltage detection input pin
22
24
IDET
VC
The current detection input pin
This pin is used to make connection with capacitor and resistor which are used for phase
compensation
1
3
SW
OSC
The pre-drive pin which used to connect the external Pch Tr
The pin used to connect capacitor to determine the frequency of oscillator
5
12
PS
VCC
The control pin of power save mode (H: power save mode, L: normal mode)
The power supply pin
4
2
GND
PGND
The ground pin
The ground pin of power unit
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 2 of 12
M62255FP
Absolute Maximum Ratings
Ratings
Unit
Supply voltage
SW drive current
Item
VCC
ISW
Symbol
28
50
V
mA
SW max. voltage
PS max. voltage
VSW
VPS
VCC
7
V
V
Power dissipation
Thermal derating ratio
Pd
Kθ
950
9.5
mW
mW/°C
Operating temperature
Storage temperature
Topr
Tstg
–20 to +75
–40 to +125
°C
°C
Thermal Derating (Maximum Rating)
1000
Power Dissipation Pd (mW)
950
800
600
400
200
0
0
25
50
75
100
125
Ambient Temperature Ta (°C)
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 3 of 12
150
Conditions
Ta = 25°C
Ta > 25°C
M62255FP
Electrical Characteristics
(Ta = 25°C, VCC = 15 V)
Block
All block
PWM
Charge
detection
block
Level
Mag.
OSC
Interface
Item
Supply voltage
Circuit current
Circuit current at power save
VCC
Min
7.5
Typ
—
Max
22
Unit
V
ICC1
ICC2
4.0
—
7.0
50
10.0
80
mA
µA
Input reference voltage
Main-SW output saturation
voltage
Vref
VsatM
—
—
5.0
0.9
—
1.2
V
V
SW output leak current
VDET input voltage range
ISWL
VDET-IN
–1
0.6
—
—
1
5.0
µA
µA
VDET input bias current
ISENSE1+ input voltage range
IDETB
VISENSE1+
–1
2.0
—
—
0
VCC – 0.5
µA
V
ISENSE1– input voltage range
ISENSE2+ input voltage range
VISENSE1–
VISENSE2+
2.0
2.0
—
—
VCC – 0.5
VCC + 1.5
V
V
ISENSE2– input voltage range
Charge voltage of fixed
voltage
VISENSE2–
VCH
2.0
4.18
—
4.20
VCC + 1.5
4.22
V
V
Charge current detection
voltage of fixed current
VICH
Differential nonlinearity at
8-bit DAC
IN input voltage range
DNL
VIN-IN
0.3
—
5
V
IN input current
DOUT output voltage range
IIN
VDOUT
–100
0.5
—
—
0
5
nA
V
Oscillation frequency
Oscillation charge current
fosc
Ioscch
70
–150
100
–120
130
–90
kHz
µA
Oscillation discharge current
Maximum ON duty
Ioscdis
TDUTY
20
—
30
95
40
—
µA
%
Oscillation output high level
Oscillation output low level
Vosch
Voscl
0.85
0.35
0.95
0.4
1.05
0.45
V
V
DI input high level
DI input low level
VDIH
VDIL
3.5
0
—
—
6.0
0.5
V
V
CS input high level
CS input low level
VCSH
VCSL
3.5
0
—
—
6.0
0.5
V
V
CK input high level
CK input low level
VCKH
VCKL
3.5
0
—
—
6.0
0.5
V
V
PS input high level
PS input low level
VPSH
VPSL
1.0
0
1.5
—
—
0.3
V
V
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 4 of 12
Symbol
Test Condition
PS input voltage
VPS = 2.0 V
ISW = 50 mA
Vref = 5.0 V,
Voltage control data is
4.2 V selected at Reset
140
160
180
mV
Vref = 5.0 V,
Current control data is
160 mV selected
–1
—
1
LSB
Vref = 5.0 V
Cosc = 390 pF
M62255FP
Digital Data Format
MSB
Last
First
DI
CK
LSB
8-bit shift register
D7
D6
CS
D5
D4
D3
D2
D1
Address decoder
D0
4
6
Latch
Latch
Latch
Latch
Latch
Latch
MPX
MPX
MPX
MPX
MPX
MPX
Current
control
SW
Voltage
control
SW
Voltage fine
control
SW
AMP
select
Input
select
A/D
reference
select
Data Timing Chart (Model)
MSB
LSB
DI
D0
D1
D2
D3
D4
D5
D6
D7
CK
CS
Data Setting
Address
Control Function
Data
Description
D7
0
D6
0
D5
0
D4
0
D3
—
D2
—
D1
—
D0
—
Current control
Voltage control
0
0
0
0
0
1
1
0
—
—
—
—
—
—
—
—
See Table 1
See Table 2
Voltage fine control
Amp. select
0
0
0
1
1
0
1
0
—
—
—
—
—
—
—
—
See Table 3
See Table 4
A/D Input select
A/D Reference select
0
0
1
1
0
1
1
0
—
—
—
—
—
—
—
—
See Table 5
See Table 6
RESET
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 5 of 12
A/D reference voltage = 2.5 V
Voltage control setting = 4.2 V
Voltage fine control setting = 0 V
Current control setting = 20 mV
M62255FP
Control Data
Table 1 Current Control Data
D3
D2
D1
D0
Current Control Input Voltage
Current Ratio
0
0
0
0
0
0
0
1
0V
20 mV
0
1/16
0
0
0
0
1
1
0
1
40 mV
80 mV
1/8
1/4
0
0
1
1
0
0
0
1
160 mV
240 mV
1/2
3/4
0
0
1
1
1
1
0
1
320 mV
—
1
Trickle
Note:
20 mV selected at RESET
Table 2 Voltage Control Data
D3
D2
D1
D0
Ref. Voltage
Table 3 Voltage Fine Control Data
D3
D2
D1
D0
Fine Cntl. Voltage
0
0
0
0
0
0
0
1
select 5.0 V
select 4.84 V
0
0
0
0
0
0
0
1
select 0 V
select –10 mV
0
0
0
0
1
1
0
1
select 4.68 V
select 4.52 V
0
0
0
0
1
1
0
1
select –20 mV
select –30 mV
0
0
1
1
0
0
0
1
select 4.36 V
select 4.20 V
0
0
1
1
0
0
0
1
select –40 mV
select –50 mV
0
0
1
1
1
1
0
1
select 4.04 V
select 3.88 V
0
0
1
1
1
1
0
1
select –60 mV
select –70 mV
1
1
0
0
0
0
0
1
select 3.72 V
select 3.56 V
1
1
0
0
0
0
0
1
select –80 mV
select –90 mV
1
1
0
0
1
1
0
1
select 3.40 V
select 3.24 V
1
1
0
0
1
1
0
1
select –100 mV
select –110 mV
1
1
1
1
0
0
0
1
select 3.08 V
select 2.92 V
1
1
1
1
0
0
0
1
select –120 mV
select –130 mV
1
1
1
1
1
1
0
1
select 2.76 V
select 2.60 V
1
1
1
1
1
1
0
1
select –140 mV
select –150 mV
Note:
4.20 V selected at RESET
Note
0 V selected at RESET
• 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 10 mV step between 2.45 V and 5.0 V.
Example 1
Table 1
Table 2
D3
D2
D1
D0
D3
D2
D1
D0
0
1
0
1
1
0
1
0
Set-up voltage:
4.20 V (Ref. voltage) – 100 mV (fine cntl. voltage) = 4.10 V
Example 2
Table 1
Table 2
D3
D2
D1
D0
D3
D2
D1
D0
1
0
0
1
1
1
1
1
Set-up voltage:
3.56 V (Ref. voltage) – 150 mV (fine cntl. voltage) = 3.41 V
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 6 of 12
M62255FP
Table 4 Amp Select
D3
D2
D1
D0
—
—
0
0
0
0
0
1
select Output of Charge Current Detect Amp
select Input of Battery Voltage Detect Amp
—
—
0
0
1
1
0
1
select Output of Battery Voltage Detect Amp
select Output of Discharge Current Detect Amp
—
1
0
0
select Output of A/D reference Voltage
Note:
State
Output of Battery Voltage Detect Amp is selected at RESET
Table 5 A/D Input Select
Note:
D3
—
D2
—
D1
0
D0
0
select IN1
State
—
—
—
—
0
1
1
0
select IN2
select IN3
—
—
1
1
select IN4
IN1 is selected at RESET
Table 6 A/D Reference Voltage Select
Note:
D3
0
D2
0
D1
0
D0
0
select 5.0 V
0
0
0
0
0
1
1
0
select 4.69 V
select 4.38 V
0
0
0
1
1
0
1
0
select 4.06 V
select 3.75 V
0
0
1
1
0
1
1
0
select 3.44 V
select 3.13 V
0
1
1
0
1
0
1
0
select 2.81 V
select 2.50 V
1
1
0
0
0
1
1
0
select 2.19 V
select 1.88 V
1
1
0
1
1
0
1
0
select 1.56 V
select 1.25 V
1
1
1
1
0
1
1
0
select 0.94 V
select 0.63 V
1
1
1
1
select 0.31 V
2.50 V is selected at RESET
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 7 of 12
State
M62255FP
Block Description
(1) Battery Voltage Detect Block
1
1
−
−
+
× 10
+
−
× 10
+
DI
Serial data
from MCU
CK
Serial-parallel
converter circuit
+
−
3
5.0 V
ISENSE1−
ISENSE1+
IN1
IN2
IN3
IN4
CS
1
+
−
Reference
voltage for
A/D converter 0.31 V
ISENSE2−
ISENSE2+
DOUT
to A/D input of MCU
Figure 1 Block Diagram of Multiplexer and Level Magnification Circuit
Multiplexer and level magnification circuit of M62255 consists from reference voltage, 4 times amplifier, 10 times
amplifier and 4 input 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 to 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 to IN4 input.
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 8 of 12
M62255FP
4.9 V
3.7 V
To DOUT
2.5 V
1.2 V
0.3 V
1.3 V
3.1 V
2.8 V
2.5 V
2.2 V
1.9 V
Reference voltage
0.1 V
To DOUT
4 times amplifier
Input voltage
Figure 2 Description of Level Magnification
Output voltage of DOUT is fixed as follows;
VDOUT = (VIN – Vref) × 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 figure 2 reference voltage is 2.5 V. When input voltage of IN1 (or IN2, IN3, IN4) is set at 2.8 V, the difference
between input voltage and reference voltage is 0.3 V. The difference voltage (0.3 V) multiplied by 4 is 1.2 V. 1.2 V
added to reference voltage (2.5 V) makes 3.7 V which is output voltage of VDOUT.
The range of output voltage of VDOUT is between 0 V and 5 V. So in figure 2 the range of input voltage of IN1 (or IN2,
IN3, IN4) is between 1.9 V and 3.1 V. (This range of input voltage is difference from selected reference voltage.)
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 9 of 12
M62255FP
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 SM-bus 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.
Current
detect
circuit
To 10 times
amplifier
ISENSE+
Charge current
Detect R
To 4 times
amplifier
Multiplexer
circuit
IN1 to IN4
Battery
ISENSE−
Figure 3 Detector Circuit of Battery Voltage/Charge Current
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 10 of 12
M62255FP
Application Circuit
To System
0.1 Ω
ChgSW
SW A
AC
adaptor
22 µH
0.1 Ω
+
100 Ω
600 kΩ
+
100 µF
300 Ω
ISENSE2+ ISENSE2−
0.1 µF
SW
ISENSE1+ ISENSE1− IDET
0.022 µF
200 kΩ
From MCU
−
VC
Battery 1
VCC
5V
reg
M62255FP
OSC
IN1
IN2
390 pF
IN3
PGND
From
each
battery
Battery 3
IN4
PS
CK
DI
CS
DOUT
Battery 4
150 kΩ
3
PS
5V
Battery 2
VDET
REF IN
GND
DchgSW
From MCU
Normal
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 11 of 12
To MCU
M62255FP
Package Dimensions
JEITA Package Code
P-SSOP24-5.3x10.1-0.80
RENESAS Code
PRSP0024GA-A
Previous Code
24P2Q-A
MASS[Typ.]
0.2g
E
13
*1
HE
24
NOTE)
1. DIMENSIONS "*1" AND "*2"
DO NOT INCLUDE MOLD FLASH.
2. DIMENSION "*3" DOES NOT
INCLUDE TRIM OFFSET.
F
1
12
Index mark
c
A2
A1
D
L
A
*2
*3
e
y
bp
Detail F
REJ03F0245-0200 Rev.2.00 Sep 14, 2007
Page 12 of 12
Reference
Symbol
D
E
A2
A
A1
bp
c
HE
e
y
L
Dimension in Millimeters
Min Nom Max
10.0 10.1 10.2
5.2 5.3 5.4
1.8
2.1
0.1 0.2
0
0.3 0.35 0.45
0.18 0.2 0.25
0°
8°
7.5 7.8 8.1
0.65 0.8 0.95
0.10
0.4 0.6 0.8
Sales Strategic Planning Div.
Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan
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Tel: <44> (1628) 585-100, Fax: <44> (1628) 585-900
Renesas Technology (Shanghai) Co., Ltd.
Unit 204, 205, AZIACenter, No.1233 Lujiazui Ring Rd, Pudong District, Shanghai, China 200120
Tel: <86> (21) 5877-1818, Fax: <86> (21) 6887-7898
Renesas Technology Hong Kong Ltd.
7th Floor, North Tower, World Finance Centre, Harbour City, 1 Canton Road, Tsimshatsui, Kowloon, Hong Kong
Tel: <852> 2265-6688, Fax: <852> 2730-6071
Renesas Technology Taiwan Co., Ltd.
10th Floor, No.99, Fushing North Road, Taipei, Taiwan
Tel: <886> (2) 2715-2888, Fax: <886> (2) 2713-2999
Renesas Technology Singapore Pte. Ltd.
1 Harbour Front Avenue, #06-10, Keppel Bay Tower, Singapore 098632
Tel: <65> 6213-0200, Fax: <65> 6278-8001
Renesas Technology Korea Co., Ltd.
Kukje Center Bldg. 18th Fl., 191, 2-ka, Hangang-ro, Yongsan-ku, Seoul 140-702, Korea
Tel: <82> (2) 796-3115, Fax: <82> (2) 796-2145
Renesas Technology Malaysia Sdn. Bhd
Unit 906, Block B, Menara Amcorp, Amcorp Trade Centre, No.18, Jalan Persiaran Barat, 46050 Petaling Jaya, Selangor Darul Ehsan, Malaysia
Tel: <603> 7955-9390, Fax: <603> 7955-9510
© 2007. Renesas Technology Corp., All rights reserved. Printed in Japan.
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