ROHM BD6088GUL_11

LED Driver s for LCD Backlights
Mulitifunction Backlight LED Driver
for Small LCD Panels (Charge Pump Type)
BD6088GUL
No.11040EAT29
●Description
BD6088GUL is “Intelligent LED Driver” that is the most suitable for the cellular phone.
It has 6LED driver for LCD Backlight and GPO 4 port.
It has ALC function, that is “Low Power Consumption System” realized.
It can be developed widely from the model high End to the model Low End.
As it has charge pump circuit for DCDC, it is no need to use coils, and it contributes to small space.
VCSP50L3(3.50mm×3.50mm 0.5mm space)
It adopts the very thin CSP package that is the most suitable for the slim phone.
●Functions
1) Total 6LEDs driver for LCD Backlight
It have 4LEDs (it can select 4LED or 3LED) for exclusire use of Main and 2LEDs which can
chose independent control or a main allotmert by resister setting.
“Main Group” can be controlled by Auto Luminous Control (ALC) system.
“Main Group” can be controlled by external PWM signal.
ON/ off and a setup of electric current are possible at the time of the independent control by the independence.
2) Ambient Light sensor interface
Main backlight can be controlled by ambient brightness.
Photo Diode, Photo Transistor, Photo IC(Linear/Logarithm) can be connected.
Bias source for ambient light sensor, gain and offset adjustment are built in.
LED driver current as ambient level can be customized.
3) Charge Pump DC/DC for LED driver
It has x1/x1.5/ x2 mode that will be selected automatically.
The most suitable voltage up magnification is controlled automatically by LED port voltage.
Output voltage fixed mode function loading (3.9V/4.2V/4.5V/4.8V)
Soft start functions, Over voltage protection (Auto-return type), Over current protection (Auto-return type) Loading
4) GPO 4 Port
Open Drain output and slope control loading
5) Thermal shutdown
6) I2C BUS FS mode(max 400kHz)
*This chip is not designed to protect itself against radioactive rays.
*This material may be changed on its way to designing.
*This material is not the official specification.
●Absolute Maximum Ratings (Ta=25 oC)
Parameter
Maximum voltage
Power Dissipation
Symbol
Ratings
Unit
VMAX
7
V
Pd
1380
(note
mW
Operating Temperature Range
Topr
-30 ～ +85
℃
Storage Temperature Range
Tstg
-55 ～ +150
℃
note) Power dissipation deleting is 11.04mW/ oC, when it’s used in over 25 oC.
(It’s deleting is on the board that is ROHM’s standard)
o
●Operating conditions (VBAT≥VIO, Ta=-35~85 C)
Parameter
VBAT input voltage
VIO pin voltage
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© 2011 ROHM Co., Ltd. All rights reserved.
Symbol
Ratings
Unit
VBAT
2.7 ～ 5.5
V
VIO
1.65 ～ 3.3
V
1/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V)
Parameter
Symbol
Limits
Min.
Typ.
Max.
Unit
Condition
【Circuit Current】
VBAT Circuit current 1
IBAT1
-
0.1
3.0
μA
RESETB=0V, VIO= 0V
VBAT Circuit current 2
IBAT2
-
0.5
3.0
μA
RESETB=0V, VIO=2.6V
VBAT Circuit current 3
IBAT3
-
61
65
mA
VBAT Circuit current 4
IBAT4
-
92
102
mA
VBAT Circuit current 5
IBAT5
-
123
140
mA
VBAT Circuit current 6
IBAT6
-
0.25
1.0
mA
DC/DC x1 mode, Io=60mA
VBAT=4.0V
DC/DC x1.5 mode, Io=60mA
VBAT=3.6V
DC/DC x2 mode, Io=60mA
VBAT=2.7V
ALC Operating
ALCEN=1, AD cycle=0.5s setting
Except sensor current
【LED Driver】
LED current Step (Setup)
ILEDSTP1
128
Step
LED1~6
LED current Step (At slope)
ILEDSTP2
256
Step
LED1~6
LED Maximum setup current
IMAXWLED
-
25.6
-
mA
LED1~6
LED current accuracy
IWLED
-7%
15
+7%
mA
ILED=15mA setting, VLED=1.0V
LED current Matching
ILEDMT
-
-
4
%
Between LED1~6
at VLED=1.0V, ILED=15mA
LED OFF Leak current
ILKLED
-
-
1.0
μA
VLED=4.5V
VoCP1
-
V
Vf is forward direction of LED
【DC/DC(Charge Pump)】
Output Voltage 1
Output Voltage 2
VoCP2
Vf+0.2 Vf+0.25
3.705
3.9
4.095
V
3.99
4.2
4.41
V
4.275
4.5
4.725
V
4.56
4.8
5.04
V
Fixation Voltage Output
ModeIo=60mA
VBAT≧3.2V
Drive ability
IOUT
-
-
150
mA
Switching frequency
fosc
0.8
1.0
1.2
MHz
OVP
-
6.0
6.5
V
OCP
-
250
375
mA
VOUT=0V
2.85
3.0
3.15
V
Io=200µA
2.47
2.6
2.73
V
Io=200µA
Over Voltage
Protection detect voltage
Over Current
Protection detect Current
VBAT≥3.2V, VOUT=3.9V
【Sensor Interface】
SBIAS Output Voltage
VoS
SBIAS Maximum Output current
IomaxS
30
-
-
mA
SBIAS Discharge resister at OFF
ROFFS
-
1.0
1.5
kΩ
VISS
0
-
VoS×
255/256
V
SSENS Input range
ADC resolution
ADRES
ADC integral calculus non-linearity
ADINL
-3
-
+3
LSB
ADC differential calculus
non-linearity
ADDNL
-1
-
+1
LSB
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8
2/51
Vo=2.6V setting
bit
2011.04 - Rev.A
BD6088GUL
Technical Note
●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V)
Parameter
Symbol
Limits
Min.
Typ.
-0.3
-
Max.
Unit
Condition
【SDA, SCL】 (I2C Interface)
L level input voltage
VILI
H level input voltage
VIHI
Hysteresis of Schmitt trigger input
VhysI
L level output voltage
VOLI
0.75 ×
VIO
0.05 ×
VIO
-
0.25 ×
VIO
VBAT
+0.3
V
V
-
-
V
0
-
0.3
V
SDA Pin, IOL=3 mA
linI
-
-
1
μA
Input Voltage
= 0.1×VIO～0.9×VIO
L level input voltage
VILR
-0.3
-
H level input voltage
VIHR
0.75 ×
VIO
-
IinR
-
-
1
μA
L level input voltage
VILA
-0.3
-
0.3
V
H level input voltage
VIHA
1.4
-
VBAT
+0.3
V
IinA
-
-
1
μA
Input Voltage
= 0.1×VBAT～0.9×VBAT
PWmin
80
-
-
μs
WPWMIN Pin
Input current
【RESETB】 (CMOS Input Pin)
Input current
0.25 ×
VIO
VBAT
+0.3
V
V
Input Voltage
= 0.1×VIO～0.9×VIO
【WPWMIN】 (NMOS Input Pin)
Input Current
PWM input minimum High pulse
width
【OUTCNT】 (Pull-down resistance NMOS Input Pin)
L level input voltage
VILA
-0.3
-
0.3
V
H level input voltage
VIHA
1.4
-
VBAT
+0.3
V
IinA
-
3.6
10
μA
Vin=1.8V
Input Current
【OUT1～4】 ( NMOS Open Drain Output Pin)
L level output voltage
VOLG
-
-
0.3
V
IOL=10mA
Output Leak current
ILKG
-
-
1.0
μA
Vout=3.6V
【GC1, GC2】 (Sensor Gain Control CMOS Output Pin)
L level output voltage
VOLS
-
-
0.2
V
IOL=1mA
H level output voltage
VOHS
VoS
-0.2
-
-
V
IOH=1mA
【KBLT】 (Key Back Light Control CMOS Output Pin)
L level output voltage
VOLK
-
-
0.2
V
IOL=1mA
H level output voltage
VOHK
VIO
-0.2
-
-
V
IOH=1mA
RPUDK
-
1.0
2.0
MΩ
Vin=3.3V
Pull-downregistance
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3/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Block Diagram / Application Circuit example 1
C2P
C2N
C1P
C1N
CPGND
1μF
1μF
VBAT
VBATCP
VOUT
Charge Pump
VBAT1
x1 / x1.5 / x2
10µF
1μF
LED1
LED2
OVP
Charge Pump
Mode Control
LED3
LED terminal voltage feedback
VIO
(
)(
)(
LED5
RESETB
LED6
SCL
SDA
Main Back Light
LED4
)
Level
I C interface
Shift
Digital Control
I/O
TSD
2
LEDGND
VBAT
WPWMIN
Key Pad
LED
IREF
・・
OUTCNT
Key
Control
VREF
KBLT
SBIAS
Photo IC
VBAT
VDD
GC1
GND
GC2
IOUT
BH1600FVC
1μF
SSENS
Sensor
I/F
LED
control
OUT1
Slope
Control
SGND
GPO
Slope
Control
Slope
Control
GC2
GC1
OUT4
GND1
T3
(Open)
T4
T2
T1
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OUT3
Slope
Control
ALC
Fig.1
OUT2
Block Diagram / Application Circuit example 1
4/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Block Diagram / Application Circuit example 2
C2P
C2N
C1P
C1N
CPGND
1μF
1μF
VBAT
VBATCP
VOUT
Charge Pump
VBAT1
x1 / x1.5 / x2
10µF
1μF
LED1
LED2
OVP
Charge Pump
Mode Control
VIO
(
)(
)(
4ch
Main Back Light
LED3
LED terminal voltage feedback
LED4
)
RESETB
LED5
SCL
SDA
I C interface
Shift
Digital Control
I/O
2ch
Sub Back Light
LED6
TSD
2
Level
LEDGND
VBAT
WPWMIN
Key Pad
LED
IREF
・・
OUTCNT
Key
Control
VREF
KBLT
SBIAS
Photo IC
VBAT
VDD
GC1
GC2
GND
1μF
IOUT
BH1600FVC
SSENS
Sensor
I/F
LED
control
OUT1
Slope
Control
SGND
GPO
Slope
Control
Slope
Control
GC2
GC1
OUT4
GND1
T3
(Open)
T4
T2
T1
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OUT3
Slope
Control
ALC
Fig.2
OUT2
Block Diagram / Application Circuit example 2
5/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Pin Arrangement ［Bottom View］
T3
F
T4
SSENS
SGND
VBAT1
VIO
E
SBIAS
GC1
GC2
SDA
OUT2
OUT4
D
LED5
LED6
SCL
OUT1
OUT3
VOUT
C
LEDGND
LED4
OUTCNT WPWMIN
C1P
C2P
B
LED2
LED3
RESETB
KBLT
C2N
VBATCP
A
T1
LED1
GND1
C1N
CPGND
T2
1
2
3
4
5
6
6 x 6 Ball
INDEX
○
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6/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Package
VCSP50L3
CSP small package
SIZE : 3.50mm×3.50mm(A difference in public：X,Y Both ±0.05mm)
2
A ball pitch : 0.5 mm
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Height : 0.55mm max
2011.04 - Rev.A
BD6088GUL
Technical Note
●Pin Functions
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Ball No. Pin Name
B6
F4
A1
A6
F6
F1
F5
B3
E4
D3
A5
A3
C1
A4
C5
B5
C6
D6
A2
B1
B2
C2
D1
D2
E1
F2
E2
E3
F3
D4
E5
D5
E6
C4
C3
B4
VBATCP
VBAT1
T1
T2
T3
T4
VIO
RESETB
SDA
SCL
CPGND
GND1
LEDGND
C1N
C1P
C2N
C2P
VOUT
LED1
LED2
LED3
LED4
LED5
LED6
SBIAS
SSENS
GC1
GC2
SGND
OUT1
OUT2
OUT3
OUT4
WPWMIN
OUTCNT
KBLT
I/O
I
I
O
I
I
I/O
I
I/O
I/O
I/O
I/O
O
I
I
I
I
I
I
O
I
O
O
O
O
O
O
I
I
O
ESD Diode
For Power For Ground
GND
GND
VBAT
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
VBAT
VBAT
VBAT
GND
GND
VBAT
GND
GND
GND
GND
GND
GND
GND
GND
GND
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
GND
VBAT
GND
GND
GND
GND
VBAT
GND
VBAT
GND
VBAT
GND
Functions
Battery is connected
Battery is connected
Test Ground Pin(short to Ground)
Test Input Pin (short to Ground)
Test Output Pin(Open)
Test Input Pin (short to Ground)
I/O Power supply is connected
Reset input (L: reset, H: reset cancel)
I2C data input / output
I2C clock input
Ground
Ground
Ground
Charge Pump capacitor is connected
Charge Pump capacitor is connected
Charge Pump capacitor is connected
Charge Pump capacitor is connected
Charge Pump output pin
LED is connected 1 for LCD Back Light
LED is connected 2 for LCD Back Light
LED is connected 3 for LCD Back Light
LED is connected 4 for LCD Back Light
LED is connected 5 for LCD Back Light
LED is connected 6 for LCD Back Light
Bias output for the Ambient Light Sensor
Ambient Light Sensor input
Ambient Light Sensor gain control output 1
Ambient Light Sensor gain control output 2
Ground
General Output Port 1
General Output Port 1
General Output Port 1
General Output Port 1
External PWM input for Back Light *
OUT1,2,3,4 Output Control (L:OFF) *
Key Back Light Control Output
Equivalent
Circuit
A
A
B
S
M
S
C
H
I
H
B
B
B
F
G
F
G
A
E
E
E
E
E
E
Q
N
X
X
B
U
U
U
U
V
L
W
* A setup of a register is separately necessary to make it effective.
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8/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Equivalent Circuit
A
B
C
VBAT
F
VBAT
G
J
VBAT
VIO
L
VBAT
Q
VBAT
VBAT
R
V
VBAT
VBAT
W
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© 2011 ROHM Co., Ltd. All rights reserved.
VBAT
E
H
VBAT
VIO
I
VBAT
M
VBAT
VBAT
N
VBAT
VBAT
S
VBAT
VBAT
U
VBAT
VIO
X
VoS
VBAT
Y
9/51
VBAT
VIO
VBAT
VIO
VBAT
2011.04 - Rev.A
BD6088GUL
Technical Note
●I2C BUS format
2
The writing/reading operation is based on the I C slave standard.
・Slave address
A7
A6
A5
A4
A3
A2
A1
R/W
1
1
1
0
1
1
0
1/0
・Bit Transfer
SCL transfers 1-bit data during H. SCL cannot change signal of SDA during H at the time of bit transfer. If SDA changes
while SCL is H, START conditions or STOP conditions will occur and it will be interpreted as a control signal.
SDA
SCL
SDA a state of stability：
SDA
It can change
Data are effective
・START and STOP condition
When SDA and SCL are H, data is not transferred on the I2C- bus. This condition indicates, if SDA changes from H to L
while SCL has been H, it will become START (S) conditions, and an access start, if SDA changes from L to H while SCL
has been H, it will become STOP (P) conditions and an access end.
SDA
SCL
S
P
STOP condition
START condition
・Acknowledge
It transfers data 8 bits each after the occurrence of START condition. A transmitter opens SDA after transfer 8bits data, and
a receiver returns the acknowledge signal by setting SDA to L.
DATA OUTPUT
BY TRANSMITTER
not acknowledge
DATA OUTPUT
BY RECEIVER
acknowledge
SCL
S
1
8
9
clock pulse for
acknowledgement
START condition
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10/51
2011.04 - Rev.A
BD6088GUL
Technical Note
・Writing protocol
A register address is transferred by the next 1 byte that transferred the slave address and the write-in command. The 3rd
byte writes data in the internal register written in by the 2nd byte, and after 4th byte or, the increment of register address is
carried out automatically. However, when a register address turns into the last address, it is set to 00h by the next
transmission. After the transmission end, the increment of the address is carried out.
*1
S X X X X X X X 0 A A7 A6 A5 A4 A3 A2 A1 A0 A D7 D6 D5 D4 D3 D2 D1 D0 A
slave address
register address
*1
D7 D6 D5 D4 D3 D2 D1 D0 A P
DATA
DATA
register address
increment
R/W=0(write)
register address
increment
A=acknowledge(SDA LOW)
A=not acknowledge(SDA HIGH)
S=START condition
P=STOP condition
*1: Write Timing
from master to slave
from slave to master
・Reading protocol
It reads from the next byte after writing a slave address and R/W bit. The register to read considers as the following address
accessed at the end, and the data of the address that carried out the increment is read after it. If an address turns into the
last address, the next byte will read out 00h. After the transmission end, the increment of the address is carried out.
S X X X X X X X
1 A D7 D6 D5 D4 D3 D2 D1 D0 A
slave address
D7 D6 D5 D4 D3 D2 D1 D0 A P
DATA
DATA
register address
increment
R/W=1(read)
register address
increment
A=acknowledge(SDA LOW)
A=not acknowledge(SDA HIGH)
S=START condition
P=STOP condition
from master to slave
from slave to master
・Multiple reading protocols
After specifying an internal address, it reads by repeated START condition and changing the data transfer direction. The
data of the address that carried out the increment is read after it. If an address turns into the last address, the next byte will
read out 00h. After the transmission end, the increment of the address is carried out.
S X X X X X X X 0 A A7 A6 A5 A4 A3 A2 A1 A0 A Sr X X X X X X X 1 A
slave address
register address
slave address
R/W=0(write)
R/W=1(read)
D7 D6 D5 D4 D3D2 D1D0 A
DATA
D7D6 D5D4D3D2D1D0 A P
DATA
register address
increment
register address
increment
A=acknowledge(SDA LOW)
A=not acknowledge(SDA HIGH)
S=START condition
P=STOP condition
Sr=repeated START condition
from master to slave
from slave to master
As for reading protocol and multiple reading protocols, please do A(not acknowledge) after doing the final reading operation.
It stops with read when ending by A(acknowledge), and SDA stops in the state of Low when the readingdata of that time is
0. However, this state returns usually when SCL is moved, data is read, and A(not acknowledge)is done.
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11/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Timing diagram
SDA
t BUF
t SU;DAT
t LOW
t HD;STA
SCL
t HD;STA
S
t SU;STO
t SU;STA
t HD;DAT
Sr
t HIGH
P
S
●Electrical Characteristics(Unless otherwise specified, Ta=25 oC, VBAT=3.6V, VIO=2.6V)
Parameter
Symbol
Standard-mode
Fast-mode
Min.
Typ.
Max.
Min.
Typ.
Max.
Unit
【I2C BUS format】
SCL clock frequency
fSCL
0
-
100
0
-
400
kHz
LOW period of the SCL clock
tLOW
4.7
-
-
1.3
-
-
μs
HIGH period of the SCL clock
tHIGH
4.0
-
-
0.6
-
-
μs
Hold time (repeated) START condition
After this period, the first clock is generated
tHD;STA
4.0
-
-
0.6
-
-
μs
Set-up time for a repeated START condition
tSU;STA
4.7
-
-
0.6
-
-
μs
Data hold time
tHD;DAT
0
-
3.45
0
-
0.9
μs
Data set-up time
tSU;DAT
250
-
-
100
-
-
ns
Set-up time for STOP condition
tSU;STO
4.0
-
-
0.6
-
-
μs
tBUF
4.7
-
-
1.3
-
-
μs
Bus free time between a STOP and START
condition
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12/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Register List
Register data
Address
Function
W/R
D7
D6
D5
D4
D3
D2
D1
D0
VOUT(1)
VOUT(0)
DCDCMD
DCDCFON
-
-
-
SFTRST
Software Reset
DC/DC function setting
-
-
W6MD
W5MD
W4MD
MLEDMD
LED Pin function setting
00h
W
01h
W
02h
W/R
-
-
-
-
ALCEN
W6EN
W5EN
MLEDEN
Power Control
03h
W
-
IMLED(6)
IMLED(5)
IMLED(4)
IMLED(3)
IMLED(2)
IMLED(1)
IMLED(0)
Main group current setting
04h
W
-
IW5(6)
IW5(5)
IW5(4)
IW5(3)
IW5(2)
IW5(1)
IW5(0)
LED5 current setting
05h
W
-
IW6(6)
IW6(5)
IW6(4)
IW6(3)
IW6(2)
IW6(1)
IW6(0)
LED6 current setting
06h
W
THL (3)
THL (2)
THL (1)
THL (0)
TLH (3)
TLH (2)
TLH (1)
TLH (0)
Main Current transition
07h
W
ADCYC (1)
ADCYC (0)
GAIN (1)
GAIN(0)
STYPE
VSB
MDCIR
SBIASON
08h
W
SOFS (3)
SOFS (2)
SOFS (1)
SOFS (0)
SGAIN (3)
SGAIN (2)
SGAIN (1)
09h
R
-
-
-
-
AMB (3)
AMB (2)
AMB (1)
AMB (0)
Ambient level
0Ah
W
-
IU0 (6)
IU0 (5)
IU0 (4)
IU0 (3)
IU0 (2)
IU0 (1)
IU0 (0)
LED Current at Ambient level 0h
0Bh
W
-
IU1 (6)
IU1 (5)
IU1 (4)
IU1 (3)
IU1 (2)
IU1 (1)
IU1 (0)
LED Current at Ambient level 1h
0Ch
W
-
IU2 (6)
IU2 (5)
IU2 (4)
IU2 (3)
IU2 (2)
IU2 (1)
IU2 (0)
LED Current at Ambient level 2h
0Dh
W
-
IU3 (6)
IU3 (5)
IU3 (4)
IU3 (3)
IU3 (2)
IU3 (1)
IU3 (0)
LED Current at Ambient level 3h
0Eh
W
-
IU4 (6)
IU4 (5)
IU4 (4)
IU4 (3)
IU4 (2)
IU4 (1)
IU4 (0)
LED Current at Ambient level 4h
0Fh
W
-
IU5 (6)
IU5 (5)
IU5 (4)
IU5 (3)
IU5 (2)
IU5 (1)
IU5 (0)
LED Current at Ambient level 5h
10h
W
-
IU6 (6)
IU6 (5)
IU6 (4)
IU6 (3)
IU6 (2)
IU6 (1)
IU6 (0)
LED Current at Ambient level 6h
11h
W
-
IU7 (6)
IU7 (5)
IU7 (4)
IU7 (3)
IU7 (2)
IU7 (1)
IU7 (0)
LED Current at Ambient level 7h
12h
W
-
IU8 (6)
IU8 (5)
IU8 (4)
IU8 (3)
IU8 (2)
IU8 (1)
IU8 (0)
LED Current at Ambient level 8h
13h
W
-
IU9 (6)
IU9 (5)
IU9 (4)
IU9 (3)
IU9 (2)
IU9 (1)
IU9 (0)
LED Current at Ambient level 9h
14h
W
-
IUA (6)
IUA (5)
IUA (4)
IUA (3)
IUA (2)
IUA (1)
IUA (0)
LED Current at Ambient level Ah
15h
W
-
IUB (6)
IUB (5)
IUB (4)
IUB (3)
IUB (2)
IUB (1)
IUB (0)
LED Current at Ambient level Bh
16h
W
-
IUC (6)
IUC (5)
IUC (4)
IUC (3)
IUC (2)
IUC (1)
IUC (0)
LED Current at Ambient level Ch
17h
W
-
IUD (6)
IUD (5)
IUD (4)
IUD (3)
IUD (2)
IUD (1)
IUD (0)
LED Current at Ambient level Dh
18h
W
-
IUE (6)
IUE (5)
IUE (4)
IUE (3)
IUE (2)
IUE (1)
IUE (0)
LED Current at Ambient level Eh
19h
W
-
IUF (6)
IUF (5)
IUF (4)
IUF (3)
IUF (2)
IUF (1)
IUF (0)
LED Current at Ambient level Fh
1Ah
W
-
-
CHYS (1)
CHYS (0)
CTH (3)
CTH (2)
CTH (1)
CTH (0)
Key driver 2 Value
judging control setup
1Bh
W
-
-
-
KBMD
OUT4MD
OUT3MD
OUT2MD
OUT1MD
OUT, KBLT Output Mode setting
1Ch
W/R
-
-
-
KBEN
OUT4EN
OUT3EN
OUT2EN
OUT1EN
OUT, KBLT Output Control
1Dh
W
FPWM
-
-
-
KBSLP(1)
KBSLP(0)
WPWMEN WPWMPOL
Measurement mode setting
SGAIN (0) Measurement data adjustment
OUTSLP(1) OUTSLP(0) OUT, KBLT Slope setting
Input "0” for "-".
A free address has the possibility to assign it to the register for the test.
Access to the register for the test and the undefined register is prohibited.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
13/51
2011.04 - Rev.A
BD6088GUL
●Register Map
Address 00h
Technical Note
< Software Reset , DC/DC function setting >
Address
R/W
Bit7
Bit6
00h
W
VOUT(1)
VOUT(0)
Initial
Value
00h
0
0
Bit5
Bit4
DCDCMD DCDCFON
0
0
Bit3
Bit2
Bit1
Bit0
-
-
-
SFTRST
-
-
-
0
Bit [7:6] : VOUT (1:0)
VOUT Output Voltage setting
“00” :
VOUT Output Voltage 3.9V
“01” :
VOUT Output Voltage 4.2V
“10” :
VOUT Output Voltage 4.5V
“11” :
VOUT Output Voltage 4.8V
Bit [5:4] : DCDCMD, DCDCFON
DC/DC setting
<DC/DC Return Mode>
“00” :
LED Pin Return
“01” :
LEDPin Return
“10” :
Output Voltage Fixation
“11” :
Output Voltage Fixation
<DC/DC ON/OFF Control>
Depend on LED ON/OFF
Depend on LED ON/OFF
Depend on LED ON/OFF
Compulsion ON
Bit [3:1] : (Not used)
Bit0 :
SFTRST Software Reset
“0” :
Reset cancel
Reset(All register initializing)
“1” :
Refer to “The explanation of Reset” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
14/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 01h < LED Pin function setting>
Address
R/W
01h
W
Initial
Value
42h
Bit7
Bit6
WPWMEN WPWMPOL
0
1
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
-
-
W6MD
W5MD
W4MD
MLEDMD
-
-
0
0
1
0
Bit7 :
WPWMEN
External PWM Input “WPWMIN” terminal Enable Control (Valid/Invalid)
“0” :
External PWM input invalid
“1” :
External PWM input valid
Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail.
Bit6 :
WPWMPOL
Polarity setting of External PWM input "WPWMIN" terminal
“0” :
External PWM ’L’ drive
“1” :
External PWM ’H’ drive
Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail.
Bit [5:4] : (Not used)
Bit3 :
W6MD
LED6 control setting (individual / Main group)
“0” :
LED6 individual control
“1” :
LED6 Main group control
Refer to “LED Driver” for detail.
Bit2 :
W5MD
LED5 control setting (individual / Main group)
“0” :
LED5 individual control
“1” :
LED5 Use (Main group)
Refer to “LED Driver” for detail.
Bit1 :
W4MD
LED4 movement setting (unuse / use)
“0” :
LED4 unuse
“1” :
LED4 use (Main group Control)
Refer to “LED Driver” for detail.
Bit0 :
MLEDMD Main group setting (Normal / ALC)
“0” :
Main group Normal Mode(ALCNon-reflection)
“1” :
Main group ALC Mode
Refer to “(1) Auto Luminous Control ON/OFF” of “The explanation of ALC” for detail.
Set up a fixation in every design because it isn't presumed W*PW that it is changed dynamically.
And, do the setup of W*PW when each LED is Off.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
15/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 02h < Power Control>
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
02h
W/R
-
-
-
-
ALCEN
W6EN
W5EN
MLEDEN
Initial
Value
00h
-
-
-
-
0
0
0
0
Bit [7:4] : (Not used)
Bit3 :
ALCEN
“0” :
“1” :
ALC function Control (ON/OFF)
ALC block OFF
ALC block ON (Ambient Measurement)
Bit2 :
W6EN
“0” :
“1” :
LED6 Control (ON/OFF)
LED6 OFF
LED6 ON(individual control)
Bit1 :
W5EN
“0” :
“1” :
LED5 Control (ON/OFF)
LED5 OFF
LED5 ON(individual control)
Bit0 :
MLEDEN
Main group LED Control (ON/OFF)
“0” :
Main group OFF
“1” :
Main group ON
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
16/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 03h < Main group LED Current setting(Normal Mode) >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
03h
W
-
IMLED(6)
IMLED(5)
IMLED(4)
IMLED(3)
IMLED(2)
IMLED(1)
IMLED(0)
Initial
Value
00h
-
0
0
0
0
0
0
0
Bit7 :
(Not used)
Bit [6:0] : IMLED (6:0)
Main Group LED Current Setting at non-ALC mode
“0000000” :
“0000001” :
“0000010” :
“0000011” :
“0000100” :
“0000101” :
“0000110” :
“0000111” :
“0001000” :
“0001001” :
“0001010” :
“0001011” :
“0001100” :
“0001101” :
“0001110” :
“0001111” :
“0010000” :
“0010001” :
“0010010” :
“0010011” :
“0010100” :
“0010101” :
“0010110” :
“0010111” :
“0011000” :
“0011001” :
“0011010” :
“0011011” :
“0011100” :
“0011101” :
“0011110” :
“0011111” :
“0100000” :
“0100001” :
“0100010” :
“0100011” :
“0100100” :
“0100101” :
“0100110” :
“0100111” :
“0101000” :
“0101001” :
“0101010” :
“0101011” :
“0101100” :
“0101101” :
“0101110” :
“0101111” :
“0110000” :
“0110001” :
“0110010” :
“0110011” :
“0110100” :
“0110101” :
“0110110” :
“0110111” :
“0111000” :
“0111001” :
“0111010” :
“0111011” :
“0111100” :
“0111101” :
“0111110” :
“0111111” :
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
0.2 mA
0.4 mA
0.6 mA
0.8 mA
1.0 mA
1.2 mA
1.4 mA
1.6 mA
1.8 mA
2.0 mA
2.2 mA
2.4 mA
2.6 mA
2.8 mA
3.0 mA
3.2 mA
3.4 mA
3.6 mA
3.8 mA
4.0 mA
4.2 mA
4.4 mA
4.6 mA
4.8 mA
5.0 mA
5.2 mA
5.4 mA
5.6 mA
5.8 mA
6.0 mA
6.2 mA
6.4 mA
6.6 mA
6.8 mA
7.0 mA
7.2 mA
7.4 mA
7.6 mA
7.8 mA
8.0 mA
8.2 mA
8.4 mA
8.6 mA
8.8 mA
9.0 mA
9.2 mA
9.4 mA
9.6 mA
9.8 mA
10.0 mA
10.2 mA
10.4 mA
10.6 mA
10.8 mA
11.0 mA
11.2 mA
11.4 mA
11.6 mA
11.8 mA
12.0 mA
12.2 mA
12.4 mA
12.6 mA
12.8 mA
“1000000” :
“1000001” :
“1000010” :
“1000011” :
“1000100” :
“1000101” :
“1000110” :
“1000111” :
“1001000” :
“1001001” :
“1001010” :
“1001011” :
“1001100” :
“1001101” :
“1001110” :
“1001111” :
“1010000” :
“1010001” :
“1010010” :
“1010011” :
“1010100” :
“1010101” :
“1010110” :
“1010111” :
“1011000” :
“1011001” :
“1011010” :
“1011011” :
“1011100” :
“1011101” :
“1011110” :
“1011111” :
“1100000” :
“1100001” :
“1100010” :
“1100011” :
“1100100” :
“1100101” :
“1100110” :
“1100111” :
“1101000” :
“1101001” :
“1101010” :
“1101011” :
“1101100” :
“1101101” :
“1101110” :
“1101111” :
“1110000” :
“1110001” :
“1110010” :
“1110011” :
“1110100” :
“1110101” :
“1110110” :
“1110111” :
“1111000” :
“1111001” :
“1111010” :
“1111011” :
“1111100” :
“1111101” :
“1111110” :
“1111111” :
17/51
13.0 mA
13.2 mA
13.4 mA
13.6 mA
13.8 mA
14.0 mA
14.2 mA
14.4 mA
14.6 mA
14.8 mA
15.0 mA
15.2 mA
15.4 mA
15.6 mA
15.8 mA
16.0 mA
16.2 mA
16.4 mA
16.6 mA
16.8 mA
17.0 mA
17.2 mA
17.4 mA
17.6 mA
17.8 mA
18.0 mA
18.2 mA
18.4 mA
18.6 mA
18.8 mA
19.0 mA
19.2 mA
19.4 mA
19.6 mA
19.8 mA
20.0 mA
20.2 mA
20.4 mA
20.6 mA
20.8 mA
21.0 mA
21.2 mA
21.4 mA
21.6 mA
21.8 mA
22.0 mA
22.2 mA
22.4 mA
22.6 mA
22.8 mA
23.0 mA
23.2 mA
23.4 mA
23.6 mA
23.8 mA
24.0 mA
24.2 mA
24.4 mA
24.6 mA
24.8 mA
25.0 mA
25.2 mA
25.4 mA
25.6 mA
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 04h < LED5 Current setting(Independence control) >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
04h
W
-
IW5(6)
IW5(5)
IW5(4)
IW5(3)
IW5(2)
IW5(1)
IW5(0)
Initial
Value
00h
-
0
0
0
0
0
0
0
Bit7 :
(Not used)
Bit [6:0] : IW5 (6:0)
LED5 Current setting
“0000000” :
“0000001” :
“0000010” :
“0000011” :
“0000100” :
“0000101” :
“0000110” :
“0000111” :
“0001000” :
“0001001” :
“0001010” :
“0001011” :
“0001100” :
“0001101” :
“0001110” :
“0001111” :
“0010000” :
“0010001” :
“0010010” :
“0010011” :
“0010100” :
“0010101” :
“0010110” :
“0010111” :
“0011000” :
“0011001” :
“0011010” :
“0011011” :
“0011100” :
“0011101” :
“0011110” :
“0011111” :
“0100000” :
“0100001” :
“0100010” :
“0100011” :
“0100100” :
“0100101” :
“0100110” :
“0100111” :
“0101000” :
“0101001” :
“0101010” :
“0101011” :
“0101100” :
“0101101” :
“0101110” :
“0101111” :
“0110000” :
“0110001” :
“0110010” :
“0110011” :
“0110100” :
“0110101” :
“0110110” :
“0110111” :
“0111000” :
“0111001” :
“0111010” :
“0111011” :
“0111100” :
“0111101” :
“0111110” :
“0111111” :
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
0.2 mA
0.4 mA
0.6 mA
0.8 mA
1.0 mA
1.2 mA
1.4 mA
1.6 mA
1.8 mA
2.0 mA
2.2 mA
2.4 mA
2.6 mA
2.8 mA
3.0 mA
3.2 mA
3.4 mA
3.6 mA
3.8 mA
4.0 mA
4.2 mA
4.4 mA
4.6 mA
4.8 mA
5.0 mA
5.2 mA
5.4 mA
5.6 mA
5.8 mA
6.0 mA
6.2 mA
6.4 mA
6.6 mA
6.8 mA
7.0 mA
7.2 mA
7.4 mA
7.6 mA
7.8 mA
8.0 mA
8.2 mA
8.4 mA
8.6 mA
8.8 mA
9.0 mA
9.2 mA
9.4 mA
9.6 mA
9.8 mA
10.0 mA
10.2 mA
10.4 mA
10.6 mA
10.8 mA
11.0 mA
11.2 mA
11.4 mA
11.6 mA
11.8 mA
12.0 mA
12.2 mA
12.4 mA
12.6 mA
12.8 mA
“1000000” :
“1000001” :
“1000010” :
“1000011” :
“1000100” :
“1000101” :
“1000110” :
“1000111” :
“1001000” :
“1001001” :
“1001010” :
“1001011” :
“1001100” :
“1001101” :
“1001110” :
“1001111” :
“1010000” :
“1010001” :
“1010010” :
“1010011” :
“1010100” :
“1010101” :
“1010110” :
“1010111” :
“1011000” :
“1011001” :
“1011010” :
“1011011” :
“1011100” :
“1011101” :
“1011110” :
“1011111” :
“1100000” :
“1100001” :
“1100010” :
“1100011” :
“1100100” :
“1100101” :
“1100110” :
“1100111” :
“1101000” :
“1101001” :
“1101010” :
“1101011” :
“1101100” :
“1101101” :
“1101110” :
“1101111” :
“1110000” :
“1110001” :
“1110010” :
“1110011” :
“1110100” :
“1110101” :
“1110110” :
“1110111” :
“1111000” :
“1111001” :
“1111010” :
“1111011” :
“1111100” :
“1111101” :
“1111110” :
“1111111” :
18/51
13.0 mA
13.2 mA
13.4 mA
13.6 mA
13.8 mA
14.0 mA
14.2 mA
14.4 mA
14.6 mA
14.8 mA
15.0 mA
15.2 mA
15.4 mA
15.6 mA
15.8 mA
16.0 mA
16.2 mA
16.4 mA
16.6 mA
16.8 mA
17.0 mA
17.2 mA
17.4 mA
17.6 mA
17.8 mA
18.0 mA
18.2 mA
18.4 mA
18.6 mA
18.8 mA
19.0 mA
19.2 mA
19.4 mA
19.6 mA
19.8 mA
20.0 mA
20.2 mA
20.4 mA
20.6 mA
20.8 mA
21.0 mA
21.2 mA
21.4 mA
21.6 mA
21.8 mA
22.0 mA
22.2 mA
22.4 mA
22.6 mA
22.8 mA
23.0 mA
23.2 mA
23.4 mA
23.6 mA
23.8 mA
24.0 mA
24.2 mA
24.4 mA
24.6 mA
24.8 mA
25.0 mA
25.2 mA
25.4 mA
25.6 mA
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 05h < LED6 Current setting(Independence control) >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
05h
W
-
IW6(6)
IW6(5)
IW6(4)
IW6(3)
IW6(2)
IW6(1)
IW6(0)
Initial
Value
00h
-
0
0
0
0
0
0
0
Bit7 :
(Not used)
Bit [6:0] : IW6 (6:0)
LED6 Current setting
“0000000” :
“0000001” :
“0000010” :
“0000011” :
“0000100” :
“0000101” :
“0000110” :
“0000111” :
“0001000” :
“0001001” :
“0001010” :
“0001011” :
“0001100” :
“0001101” :
“0001110” :
“0001111” :
“0010000” :
“0010001” :
“0010010” :
“0010011” :
“0010100” :
“0010101” :
“0010110” :
“0010111” :
“0011000” :
“0011001” :
“0011010” :
“0011011” :
“0011100” :
“0011101” :
“0011110” :
“0011111” :
“0100000” :
“0100001” :
“0100010” :
“0100011” :
“0100100” :
“0100101” :
“0100110” :
“0100111” :
“0101000” :
“0101001” :
“0101010” :
“0101011” :
“0101100” :
“0101101” :
“0101110” :
“0101111” :
“0110000” :
“0110001” :
“0110010” :
“0110011” :
“0110100” :
“0110101” :
“0110110” :
“0110111” :
“0111000” :
“0111001” :
“0111010” :
“0111011” :
“0111100” :
“0111101” :
“0111110” :
“0111111” :
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
0.2 mA
0.4 mA
0.6 mA
0.8 mA
1.0 mA
1.2 mA
1.4 mA
1.6 mA
1.8 mA
2.0 mA
2.2 mA
2.4 mA
2.6 mA
2.8 mA
3.0 mA
3.2 mA
3.4 mA
3.6 mA
3.8 mA
4.0 mA
4.2 mA
4.4 mA
4.6 mA
4.8 mA
5.0 mA
5.2 mA
5.4 mA
5.6 mA
5.8 mA
6.0 mA
6.2 mA
6.4 mA
6.6 mA
6.8 mA
7.0 mA
7.2 mA
7.4 mA
7.6 mA
7.8 mA
8.0 mA
8.2 mA
8.4 mA
8.6 mA
8.8 mA
9.0 mA
9.2 mA
9.4 mA
9.6 mA
9.8 mA
10.0 mA
10.2 mA
10.4 mA
10.6 mA
10.8 mA
11.0 mA
11.2 mA
11.4 mA
11.6 mA
11.8 mA
12.0 mA
12.2 mA
12.4 mA
12.6 mA
12.8 mA
“1000000” :
“1000001” :
“1000010” :
“1000011” :
“1000100” :
“1000101” :
“1000110” :
“1000111” :
“1001000” :
“1001001” :
“1001010” :
“1001011” :
“1001100” :
“1001101” :
“1001110” :
“1001111” :
“1010000” :
“1010001” :
“1010010” :
“1010011” :
“1010100” :
“1010101” :
“1010110” :
“1010111” :
“1011000” :
“1011001” :
“1011010” :
“1011011” :
“1011100” :
“1011101” :
“1011110” :
“1011111” :
“1100000” :
“1100001” :
“1100010” :
“1100011” :
“1100100” :
“1100101” :
“1100110” :
“1100111” :
“1101000” :
“1101001” :
“1101010” :
“1101011” :
“1101100” :
“1101101” :
“1101110” :
“1101111” :
“1110000” :
“1110001” :
“1110010” :
“1110011” :
“1110100” :
“1110101” :
“1110110” :
“1110111” :
“1111000” :
“1111001” :
“1111010” :
“1111011” :
“1111100” :
“1111101” :
“1111110” :
“1111111” :
19/51
13.0 mA
13.2 mA
13.4 mA
13.6 mA
13.8 mA
14.0 mA
14.2 mA
14.4 mA
14.6 mA
14.8 mA
15.0 mA
15.2 mA
15.4 mA
15.6 mA
15.8 mA
16.0 mA
16.2 mA
16.4 mA
16.6 mA
16.8 mA
17.0 mA
17.2 mA
17.4 mA
17.6 mA
17.8 mA
18.0 mA
18.2 mA
18.4 mA
18.6 mA
18.8 mA
19.0 mA
19.2 mA
19.4 mA
19.6 mA
19.8 mA
20.0 mA
20.2 mA
20.4 mA
20.6 mA
20.8 mA
21.0 mA
21.2 mA
21.4 mA
21.6 mA
21.8 mA
22.0 mA
22.2 mA
22.4 mA
22.6 mA
22.8 mA
23.0 mA
23.2 mA
23.4 mA
23.6 mA
23.8 mA
24.0 mA
24.2 mA
24.4 mA
24.6 mA
24.8 mA
25.0 mA
25.2 mA
25.4 mA
25.6 mA
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 06h < Main Current slope time setting >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
06h
W
THL(3)
THL(2)
THL(1)
THL(0)
TLH(3)
TLH(2)
TLH(1)
TLH(0)
Initial
Value
C7h
1
1
0
0
0
1
1
1
Bit [7:4] : THL (3:0)
Main LED current Down transition per 0.2mA step
“0000” :
0.256 ms
“0001” :
0.512 ms
“0010” :
1.024 ms
“0011” :
2.048 ms
“0100” :
4.096 ms
“0101” :
8.192 ms
“0110” :
16.38 ms
“0111” :
32.77 ms
“1000” :
65.54 ms
“1001” :
131.1 ms
“1010” :
196.6 ms
“1011” :
262.1 ms
“1100” :
327.7 ms
(Initial value)
“1101” :
393.2 ms
“1110” :
458.8 ms
“1111” :
524.3 ms
Setting time is counted based on the switching frequency of Charge Pump.
The above value becomes the value of the Typ (1MHz) time.
Refer to “(9) Slope Process” of “The explanation of ALC” for detail.
Bit [3:0] : TLH (3:0) Main LED current Up transition per 0.2mA step
“0000” :
0.256 ms
“0001” :
0.512 ms
“0010” :
1.024 ms
“0011” :
2.048 ms
“0100” :
4.096 ms
“0101” :
8.192 ms
“0110” :
16.38 ms
“0111” :
32.77 ms
(Initial value)
“1000” :
65.54 ms
“1001” :
131.1 ms
“1010” :
196.6 ms
“1011” :
262.1 ms
“1100” :
327.7 ms
“1101” :
393.2 ms
“1110” :
458.8 ms
“1111” :
524.3 ms
Setting time is counted based on the switching frequency of Charge Pump.
The above value becomes the value of the Typ (1MHz) time.
Refer to “(9) Slope Process” of “The explanation of ALC” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
20/51
2011.04 - Rev.A
BD6088GUL
Address 07h
Technical Note
< ALC mode setting >
Address
R/W
07h
W
Initial
Value
81h
Bit7
Bit6
ADCYC(1) ADCYC(0)
1
0
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
GAIN(1)
GAIN(0)
STYPE
VSB
MDCIR
SBIASON
0
0
0
0
0
1
Bit [7:6] : ADCYC(1:0)
ADC Measurement Cycle
“00” :
0.52 s
“01” :
1.05 s
“10” :
1.57 s (Initial value)
“11” :
2.10 s
Refer to “(4) A/D conversion” of “The explanation of ALC” for detail.
Bit [5:4] : GAIN(1:0)
Sensor Gain Switching Function Control (This is effective only at STYPE=“0”.)
“00” :
Auto Change (Initial value)
“01” :
High
“10” :
Low
“11” :
Fixed
Refer to “(3) Gain control” of “The explanation of ALC” for detail.
Bit3 :
STYPE
Ambient Light Sensor Type Select (Linear/Logarithm)
“0” :
For Linear sensor (Initial value)
“1” :
For Log sensor
Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail.
Bit2 :
VSB
SBIAS Output Voltage Control
“0” :
SBIAS output voltage 3.0V
(Initial value)
“1” :
SBIAS output voltage 2.6V
Refer to “(2) I/V conversion” of “The explanation of ALC” for detail.
Bit1 :
MDCIR
LED Current Reset Select by Mode Change
“0” :
LED current non-reset when mode change
(Initial value)
“1” :
LED current reset when mode change
Refer to “(10) LED current reset when mode change” of “The explanation of ALC” for detail.
Bit0 :
SBIASON
“0” :
Measurement cycle synchronous
“1” :
Usually ON (at ALCEN=1) (Initial value)
Refer to “(4) A/D conversion” of “The explanation of ALC” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
21/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 08h < ADC Data adjustment >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
08h
W
SOFS(3)
SOFS(2)
SOFS(1)
SOFS(0)
SGAIN(3)
SGAIN(2)
SGAIN(1)
SGAIN(0)
Initial
Value
00h
0
0
0
0
0
0
0
0
Bit [7:4] : SOFS (3:0)
“1000” :
“1001” :
“1010” :
“1011” :
“1100” :
“1101” :
“1110” :
“1111” :
“0000” :
“0001” :
“0010” :
“0011” :
“0100” :
“0101” :
“0110” :
“0111” :
ADC Data Offset adjustment
-8 LSB
-7 LSB
-6 LSB
-5 LSB
-4 LSB
-3 LSB
-2 LSB
-1 LSB
no adjustment
+1 LSB
+2 LSB
+3 LSB
+4 LSB
+5 LSB
+6 LSB
+7 LSB
Offset adjust is performed to ADC data.
Refer to “(5) ADC data Gain/offset adjustment” of “The explanation of ALC” for detail.
Bit [3:0] : SGAIN (3:0) ADC Data Inclination adjustment
“1000” :
reserved
“1001” :
reserved
“1010” :
-37.50%
“1011” :
-31.25%
“1100” :
-25.00%
“1101” :
-18.75%
“1110” :
-12.50%
“1111” :
-6.25%
“0000” :
no adjustment
“0001” :
+6.25%
“0010” :
+12.50%
“0011” :
+18.75%
“0100” :
+25.00%
“0101” :
+31.25%
“0110” :
+37.50%
“0111” :
reserved
Gain adjust is performed to ADC data.
The data after adjustment are round off by 8-bit data.
Refer to “(5) ADC data Gain/offset adjustment” of “The explanation of ALC” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
22/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 09h < Ambient level (Read Only) >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
09h
R
-
-
-
-
AMB(3)
AMB(2)
AMB(1)
AMB(0)
Initial
Value
(00h)
-
-
-
-
(0)
(0)
(0)
(0)
Bit [7:4] : (Not used)
Bit [3:0] : AMB (3:0)
“0000” :
“0001” :
“0010” :
“0011” :
“0100” :
“0101” :
“0110” :
“0111” :
“1000” :
“1001” :
“1010” :
“1011” :
“1100” :
“1101” :
“1110” :
“1111” :
Ambient Level
0h
1h
2h
3h
4h
5h
6h
7h
8h
9h
Ah
Bh
Ch
Dh
Eh
Fh
It begins to read Ambient data through I2C, and possible.
To the first AD measurement completion, it is AMB(3:0)=0000.
Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
23/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 0Ah~19h < Ambient LED Current setting >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0Ah~19h
W
IU*(7)
IU*(6)
IU*(5)
IU*(4)
IU*(3)
IU*(2)
IU*(1)
IU*(0)
Initial
Value
-
Refer to after page for initial table.
“*” means 0~F.
Bit7 :
(Not used)
Bit [6:0] : IU* (6:0)
Main Current at Ambient Level for 0h~Fh
“0000000” :
“0000001” :
“0000010” :
“0000011” :
“0000100” :
“0000101” :
“0000110” :
“0000111” :
“0001000” :
“0001001” :
“0001010” :
“0001011” :
“0001100” :
“0001101” :
“0001110” :
“0001111” :
“0010000” :
“0010001” :
“0010010” :
“0010011” :
“0010100” :
“0010101” :
“0010110” :
“0010111” :
“0011000” :
“0011001” :
“0011010” :
“0011011” :
“0011100” :
“0011101” :
“0011110” :
“0011111” :
“0100000” :
“0100001” :
“0100010” :
“0100011” :
“0100100” :
“0100101” :
“0100110” :
“0100111” :
“0101000” :
“0101001” :
“0101010” :
“0101011” :
“0101100” :
“0101101” :
“0101110” :
“0101111” :
“0110000” :
“0110001” :
“0110010” :
“0110011” :
“0110100” :
“0110101” :
“0110110” :
“0110111” :
“0111000” :
“0111001” :
“0111010” :
“0111011” :
“0111100” :
“0111101” :
“0111110” :
“0111111” :
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
0.2 mA
0.4 mA
0.6 mA
0.8 mA
1.0 mA
1.2 mA
1.4 mA
1.6 mA
1.8 mA
2.0 mA
2.2 mA
2.4 mA
2.6 mA
2.8 mA
3.0 mA
3.2 mA
3.4 mA
3.6 mA
3.8 mA
4.0 mA
4.2 mA
4.4 mA
4.6 mA
4.8 mA
5.0 mA
5.2 mA
5.4 mA
5.6 mA
5.8 mA
6.0 mA
6.2 mA
6.4 mA
6.6 mA
6.8 mA
7.0 mA
7.2 mA
7.4 mA
7.6 mA
7.8 mA
8.0 mA
8.2 mA
8.4 mA
8.6 mA
8.8 mA
9.0 mA
9.2 mA
9.4 mA
9.6 mA
9.8 mA
10.0 mA
10.2 mA
10.4 mA
10.6 mA
10.8 mA
11.0 mA
11.2 mA
11.4 mA
11.6 mA
11.8 mA
12.0 mA
12.2 mA
12.4 mA
12.6 mA
12.8 mA
“1000000” :
“1000001” :
“1000010” :
“1000011” :
“1000100” :
“1000101” :
“1000110” :
“1000111” :
“1001000” :
“1001001” :
“1001010” :
“1001011” :
“1001100” :
“1001101” :
“1001110” :
“1001111” :
“1010000” :
“1010001” :
“1010010” :
“1010011” :
“1010100” :
“1010101” :
“1010110” :
“1010111” :
“1011000” :
“1011001” :
“1011010” :
“1011011” :
“1011100” :
“1011101” :
“1011110” :
“1011111” :
“1100000” :
“1100001” :
“1100010” :
“1100011” :
“1100100” :
“1100101” :
“1100110” :
“1100111” :
“1101000” :
“1101001” :
“1101010” :
“1101011” :
“1101100” :
“1101101” :
“1101110” :
“1101111” :
“1110000” :
“1110001” :
“1110010” :
“1110011” :
“1110100” :
“1110101” :
“1110110” :
“1110111” :
“1111000” :
“1111001” :
“1111010” :
“1111011” :
“1111100” :
“1111101” :
“1111110” :
“1111111” :
24/51
13.0 mA
13.2 mA
13.4 mA
13.6 mA
13.8 mA
14.0 mA
14.2 mA
14.4 mA
14.6 mA
14.8 mA
15.0 mA
15.2 mA
15.4 mA
15.6 mA
15.8 mA
16.0 mA
16.2 mA
16.4 mA
16.6 mA
16.8 mA
17.0 mA
17.2 mA
17.4 mA
17.6 mA
17.8 mA
18.0 mA
18.2 mA
18.4 mA
18.6 mA
18.8 mA
19.0 mA
19.2 mA
19.4 mA
19.6 mA
19.8 mA
20.0 mA
20.2 mA
20.4 mA
20.6 mA
20.8 mA
21.0 mA
21.2 mA
21.4 mA
21.6 mA
21.8 mA
22.0 mA
22.2 mA
22.4 mA
22.6 mA
22.8 mA
23.0 mA
23.2 mA
23.4 mA
23.6 mA
23.8 mA
24.0 mA
24.2 mA
24.4 mA
24.6 mA
24.8 mA
25.0 mA
25.2 mA
25.4 mA
25.6 mA
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 1Ah < Key Driver 2 value decision control setting >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
1Ah
W
-
-
CHYS(1)
CHYS(0)
CTH(3)
CTH(2)
CTH(1)
CTH(0)
Initial
Value
2Ah
-
-
1
0
1
0
1
0
Bit [7:6] : (Not used)
Bit [5:4] : CHYS(1:0) Key DriverON Brightness hysteresis
“00” :
Ambient 1h Width
“01” :
Ambient 2h Width
“10” :
Ambient 3h Width (initial)
“11” :
Ambient 4h Width
Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail.
Bit [3:0] : CTH (3:0) Key DriverOFF Brightness threshold
“0000” :
Ambient level 0h OFF
“0001” :
Ambient level 1h OFF
“0010” :
Ambient level 2h OFF
“0011” :
Ambient level 3h OFF
“0100” :
Ambient level 4h OFF
“0101” :
Ambient level 5h OFF
“0110” :
Ambient level 6h OFF
“0111” :
Ambient level 7h OFF
“1000” :
Ambient level 8h OFF
“1001” :
Ambient level 9h OFF
“1010” :
Ambient level Ah OFF (initial)
“1011” :
Ambient level Bh OFF
“1100” :
Ambient level Ch OFF
“1101” :
Ambient level Dh OFF
“1110” :
Ambient level Eh OFF
“1111” :
Ambient level Fh OFF
Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
25/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 1Bh < OUT KEY Output Mode setting >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
1Bh
W
-
-
-
KBMD
OUT4MD
OUT3MD
OUT2MD
OUT1MD
Initial
Value
00h
-
-
-
0
0
0
0
0
Bit [7:5] : (Not used)
Bit4 :
KBMD Key back light mode choice (ALC/ Individual)
“0” :
KBLT ALC Control
“1” :
KBLT Individual Control
Refer to “(13) Key back light PWM control” of “The explanation of “ ALC” for detail.
Bit3 :
OUT4MD OUTCNT External Control setting
“0” :
OUTCNT invalid, OUT4 output depends on output control by OUT4EN.
“1” :
OUT4 output depends on output control by OUT4EN with OUTCNT=H.
With OUTCNT=L, OUT4=Hi-z (compulsory off).
Refer to “The explanation of OUTPWM control” for detail.
Bit2 :
OUT3MD OUTCNT External Control setting
“0” :
OUTCNT invalid, OUT3 output depends on output control by OUT3EN.
“1” :
OUT3 output depends on output control by OUT3EN with OUTCNT=H.
With OUTCNT=L, OUT3=Hi-z (compulsory off).
Refer to “The explanation of OUTPWM control” for detail.
Bit1 :
OUT2MD OUTCNT External Control setting
“0” :
OUTCNT invalid, OUT2 output depends on output control by OUT2EN.
“1” :
OUT2 output depends on output control by OUT2EN with OUTCNT=H.
With OUTCNT=L, OUT2=Hi-z (compulsory off).
Refer to “The explanation of OUTPWM control” for detail.
Bit0 :
OUT1MD OUTCNT External Control setting
“0” :
OUTCNT invalid, OUT1 output depends on output control by OUT1EN.
“1” :
OUT1 output depends on output control by OUT1EN with OUTCNT=H.
With OUTCNT=L, OUT1=Hi-z (compulsory off).
Refer to “The explanation of OUTPWM control” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
26/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Address 1Ch < OUT KEY Output level setting >
Address
R/W
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
1Ch
W/R
-
-
-
KBEN
OUT4EN
OUT3EN
OUT2EN
OUT1EN
Initial
Value
00h
-
-
-
0
0
0
0
0
Bit [7:5] : (Not used)
Bit4 :
KBEN KBLT output level setting (non-ALC mode)
“0” :
KBLT L 出力
“1” :
KBLT H 出力
Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail.
Bit3 :
OUT4EN OUT4 Output level setting
“0” :
OUT4 Hi-Z Output
“1” :
OUT4 L Output
Refer to “The explanation of OUTPWM control” for detail.
Bit2 :
OUT3EN OUT3 Output level setting
“0” :
OUT3 Hi-Z Output
“1” :
OUT3 L Output
Refer to “The explanation of OUTPWM control” for detail.
Bit1 :
OUT2EN OUT2 Output level setting
“0” :
OUT2 Hi-Z Output
“1” :
OUT2 L Output
Refer to “The explanation of OUTPWM control” for detail..
Bit0 :
OUT1EN OUT1Output level setting
“0” :
OUT1 Hi-Z Output
“1” :
OUT1 L Output
Refer to “The explanation of OUTPWM control” for detail.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
27/51
2011.04 - Rev.A
BD6088GUL
Address 1Dh
Technical Note
< OUT KEY Output Mode setting >
Address
R/W
Bit7
Bit6
Bit5
Bit4
1Dh
W
FPWM
-
-
-
Initial
Value
00h
0
-
-
-
Bit7 :
Bit3
Bit2
Bit1
Bit0
KBSLP (1) KBSLP (0) OUTSLP(1) OUTSLP(0)
0
0
0
0
FPWM Key Driver, OUT1～4 PWM cycle setting
“0” :
2.048 ms
“1” :
4.096 ms
Refer to “(13) Key back light PWM control” of “The explanation of ALC” and
“The explanation of OUTPWM control” for detail.
Bit [6:4] : (未使用)
Bit [3:2] : KBSLP(1:0) The slope time of around 1step for Key Driver PWM
FPWM=0
FPWM=1
“00” :
0.00 ms
0.00 ms
“01” :
16.38 ms
32.77 ms
“10” :
32.77 ms
65.54 ms
“11” :
65.54 ms
131.08 ms
Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail.
Bit [1:0] : OUTSLP(1:0) The slope time of around 1step for OUT1～4 PWM
FPWM=0
FPWM=1
“00” :
0.00 ms
0.00 ms
“01” :
16.38 ms
32.77 ms
“10” :
32.77 ms
65.54 ms
“11” :
65.54 ms
131.08 ms
Refer to “The explanation of OUTPWM control” for detail.
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28/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Reset
There are two kinds of reset, software reset and hardware reset
(1) Software reset
・All the registers are initialized by SFTRST="1".
・SFTRST is an automatically returned to "0". (Auto Return 0).
(2) Hardware reset
・It shifts to hardware reset by changing RESETB pin “H” → “L”.
・The condition of all the registers under hardware reset pin is returned to the initial value, and it stops accepting all address.
・It’s possible to release from a state of hardware reset by changing RESETB pin “L” → “H”.
・RESETB pin has delay circuit. It doesn’t recognize as hardware reset in “L” period under 5μs.
(3) Reset Sequence
・When hardware reset was done during software reset, software reset is canceled when
hardware reset is canceled. (Because the initial value of software reset is “0”)
●VIODET
The decline of the VIO voltage is detected, and faulty operation inside the LSI is prevented by giving resetting to Levelsift block
Image Block Diagram
VIO
VBAT
DEToutput
2.6V
Inside reset
Reset by
VIODET
VBAT
(typ)1.0V
VIO
VIODET
RESETB
RESETB
R
Digital
pin
I/O
LEVEL
SHIFT
DET output
Inside reset
When the VIO voltage becomes more than typ1.0V(Vth of NMOS in the IC), VIODET is removed.
On the contrary, when VIO is as follows 1.0V, it takes reset.(The VBAT voltage being a prescribed movement range)
●thermal shutdown
A thermal shutdown function is effective in the following block.
DC/DC (Charge Pump)
LED Driver
SBIAS
The thermal shutdown function is detection temperature that it works is about 195℃.
o
Detection temperature has a hysteresis, and detection release temperature is about 175 C.
(Design reference value)
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29/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●DC/DC Explanation for operate
Start
DC/DC circuit operates when any LED turns ON. (DCDCFON=0)
When the start of theDC/DC circuit is done, it has the soft start function to prevent a rush current.
Force of VBAT and VIO is to go as follows.
DCDCMD=1 must be set in the fixed voltage mode and DCDCMD=DCDCFON=1 must be set when DCDC output takes
place regardless of LEDs.
VBAT
VIO
T VIOON=min 0.1ms
T VIOOFF=min 0.1ms
RESETB
T RSTB=min 0.1ms
T RST=min 0ms
EN (*)
T SO FT
VOUT
LEDcurrent
(*) An EN signal means the following in the upper figure.
EN = “MLEDEN” or “W＊EN”
(= LED The LED lighting control of a setup of connection VOUT)
But, as for Ta > TTSD (typ : 195° C), a protection function functions, and an EN signal doesn't become effective.
TSOFT changes by the capacitor connected to VOUT and inside OSC.
TSOFT is Typ 200μs (when the output capacitor of VOUT =1.0μF).
Over Voltage protection / Over Current protection
DC/DC circuit output (VOUT) is equipped with the over-voltage protection and the over current protection function.
A VOUT over-voltage detection voltage is about 6.0V(typ). (VOUT at the time of rise in a voltage)
A detection voltage has a hysteresis, and a detection release voltage is about 5.1V(typ).
And, when VOUT output short to ground, input current of the battery terminal is limited by an over current protection function.
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30/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Mode transition
The transition of boosts multiple transits automatically by VBAT Voltage and the VOUT Pin Voltage.
STANDBY
1
condition○
ALL off
MLEDEN=”1” or W*EN=”1”
and
1
○
Ta<TTSD
SOFT
CP x1.0 mode
After detecting VOUT>1.5V(typ), 128us(typ) wait
X1.0
CP x1.0 mode
mode up=”H”
mode down=”H”
X1.5
CP x1.5 mode
mode up=”H”
mode down=”H”
X2.0
CP x2.0 mode
The mode transition of the charge pump works as follows.
＜x1.0→x1.5→x2.0 Mode transition＞
The transition of the mode is done when VOUT was compared with VBAT and the next condition was satisfied.
x1.0→x1.5 Mode transition
VBAT ≤ VOUT + (Ron10×Iout)
(LED Pin feedback：VOUT = Vf+0.2(Typ))
x1.5→x2.0 Mode transition
VBAT×1.5 ≤ VOUT +(Ron15×Iout)
(LED Pin feedback：VOUT = Vf+0.2(Typ))
Ron10: x1 Charge pump on resistance 1.2Ω(Typ)
Ron15: x1.5 Charge pump on resistance 7.1Ω(Typ)
＜x2.0→x1.5→x1.0 Mode transition＞
The transition of the mode is done when the ratio of VOUT and VBAT is detected and it exceeds a fixed voltage ratio.
x1.5→x1.0 Mode transition
VBAT / VOUT =1.16(Design value)
x2.0→x1.5 Mode transition
VBAT / VOUT =1.12(Design value)
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31/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●LED Driver
The LED driver of 6ch is constructed as the ground plan.
Equivalence control is possible with LED1 - 4(LED4 can choose use/un-use with a register W4MD.).
LED5, LED6 is controllable individually.
As for LED5, LED6, grouping setting to the main control is possible, and main control becomes effective for the main group
in the allotment. LED5 and LED6 are setups of grouping to the main control.
When LED5 and LED6 are used by the individual control, a slope time setup (register THL and TLH) doesn't become effective.
LED1
LED2
IMLED[6:0]
MLEDEN
LED3
MLEDMD
WPWMIN
LED4
W4MD
1
IW5[6:0]
W5EN
LED5
0
W5MD
1
IW6[6:0]
W6EN
LED6
0
W6MD
●General-purpose Output Ports
General-purpose Output Ports 4ch is constructed as the ground plan.
VGPO
VLED
GPO
GPO
Slope
Slope
Control
Control
Vf
OUT*
OUT*
When OUT* is used with Pull Up.
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When OUT* is used with LED.
32/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●The explanation of ALC (Auto Luminous Control)
LCD backlight current adjustment is possible in the basis of the data detected by external ambient light sensor.
・Extensive selection of the ambient light sensors (Photo Diode, Photo Transistor, Photo IC(linear/logarithm)) is
possible by building adjustment feature of Sensor bias, gain adjustment and offset adjustment.
・Ambient data is changed into ambient level by digital data processing, and it can be read through I2C I/F.
・Register setting can customize a conversion to LED current. (Initial value is pre-set.)
・ Natural dimming of LED driver is possible with the adjustment of the current transition speed.
・ON/ off of the key back light can be controlled automatically by the brightness.
PWM Polarity
switching
PWM enabling
Usually ON / intermittent
WPWMIN
Sensor Offset Correction
SBIAS
SBIAS
Slope Timer
Sensor Gain Correction
LIN/LOG
Sensor
SSENS
ADC
Data
Correction
Mode Select
Conversion
LED*
LCD
Backlight
Average
Slope
process
Current
Logarithmic Conv.
Conversion
Ambient Level
VBAT
DC current setup
Main Group
setup
GC1
GC2
・・
2 value
decision
Gain
Control
Ambient Level
Gain Control ON/OFF
PWM
process
Threshold
Mode Select
KBLT
Key
Backlight
Slope Timer
Hysteresis
PWM Cycle
: Effective also in ALC functional the case of not using it
(1) Auto Luminous Control ON/OFF
・ALC block can be independent setting ON/OFF.
・It can use only to measure the Ambient level.
Register : ALCEN
Register : MLEDEN
Register : MLEDMD
・Refer to under about the associate ALC mode and Main LED current.
ALCEN
MLEDEN
MLEDMD
0
0
0
1
1
1
0
1
1
0
1
1
x
0
1
x
0
1
Sensor I/F
LED control
Mode
OFF
OFF
Non ALC
mode
OFF
( AMB(3:0)=0h )
ON
OFF
ON
ON
ALC mode
Main LED
current
IMLED(6:0)
IU0(6:0) (*1)
IMLED(6:0)
ALC mode (*2)
(*1) At this mode, because Sensor I/F is OFF, AMB(3:0)=0h.
So, Main LED current is selected IU0(6:0).
(*2) At this mode, Main LED current is selected IU0(6:0)~IUF(6:0)
It becomes current value corresponding to each brightness.
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33/51
2011.04 - Rev.A
BD6088GUL
(2) I/V conversion
・The bias voltage and external resistance for the I-V conversion (Rs)
are adjusted with adaptation of sensor characteristic
・The bias voltage is selectable by register setup.
Register : VSB
“0” : SBIAS output voltage 3.0V
“1” : SBIAS output voltage 2.6V
Sensor Current (Iout)
Technical Note
Ambient
SBIAS
SSENS voltage
VSSENS
VCC
Sensor IC
A/D
Iout
IOUT
SSENS
GND
Rs
SGND
BD6088GUL
Rs : Sense resistance (A sensor output current is changed into the voltage value.)
SBIAS : Bias power supply terminal for the sensor (3.0V / 2.6V by register setting)
SSENS : Sense voltage input terminal
SSENS Voltage (=Iout x Rs)
SBIAS
Rs is large
Rs is small
Ambient
SSENS Voltage = Iout x Rs
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34/51
2011.04 - Rev.A
BD6088GUL
(3) Gain control
・Sensor gain switching function is built in to extend the dynamic range.
・It is controlled by register setup.
・When automatic gain control is off, the gain status can be set upin the manual.
Register : GAIN(1:0)
・GC1 and GC2 are outputted corresponding to each gain status.
SSENS Voltage
Technical Note
High Gain mode
Low Gain mode
SSENS Voltage
Ambient
Auto Gain mode
Ambient
Example 1 (Use BH1600FVC)
SBIAS
SBIAS
SSENS
SSENS
SSENS
GC1
GC1
GC1
GC2
GC2
GC2
SGND
SGND
SGND
BH1600
GC1
GND
GC2
１
Applicationexample
Example 3
SBIAS
9.5 (*1)
VCC IOUT
Example 2
Resister values are relative
(*1)
Operating mode
Auto
GAIN(1:0) setting
Gain status
GC1 output
GC2 output
00
High Low
L
L
Manual
High
Low
01
10
High
Low
L
L
Auto
00
High Low
L
L
Manual
High
Low
01
10
High
Low
L
L
Fixed
11
L
: This means that it becomes High with A/D measurement cycle synchronously.
: Set up the relative ratio of the resistance in the difference in the brightness change of the High Gain mode and the Low Gain mode carefully.
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35/51
2011.04 - Rev.A
BD6088GUL
Technical Note
(4) A/D conversion
・The detection of ambient data is done periodically for the low power.
・SBIAS and ADC are turned off except for the ambient measurement.
・The sensor current may be shut in this function, it can possible to decrease the current consumption.
・SBIAS pin and SSENS pin are pull-down in internal when there are OFF.
・SBIAS circuit has the two modes. (Usually ON mode or intermittent mode)
Register : ADCYC(1:0)
Register : SBIASON
16 times
ALCEN
ADCYC(1:0)
ADC Cycle
SBIAS Output
Twait= 64ms(typ)
(Wait time)
When SBIASON=1
ADC Movement
TAD= 16.4ms(typ)
AD start signal
(A/D conversion time)
GC1, GC2
GC1, GC2=00
TADone= 1.024ms(typ)
AMB(3:0)
AMB(3:0)
16 times measurement
Toprt= 80.4ms(typ)
(Operate time)
(5) ADC data Gain / offset adjustment
・To correct the characteristic dispersion of the sensor,
Gain and offset adjustment to ADC output data is possible.
・They are controlled by register setup.
Register : SGAIN(3:0)
Register : SOFS(3:0)
Ambient
SSENS Voltage
SSENS Voltage
SSENS Voltage
< Gain Adjustment >
Ambient
Gain adjustment
SGAIN(3:0)
Ambient
Ambient
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SSENS Voltage
SSENS Voltage
SSENS Voltage
< Offset Adjustment >
Ambient
36/51
Offset adjustment
SOFS(3:0)
Ambient
2011.04 - Rev.A
BD6088GUL
Technical Note
(6) Average filter
・Average filter is built in to rid noise or flicker.
・Average is 16 times
(7) Ambient level detection
・Averaged A/D value is converted to Ambient level corresponding to Gain control and sensor type.
・Ambient level is judged to rank of 16 steps by ambient data.
・The type of ambient light sensor can be chosen by register.
(Linear type sensor / Logarithm type sensor)
Register : STYPE
“0” : For Linear sensor
“1” : For Log sensor
・Ambient level is output through I2C.
Register : AMB(3:0)
STYPE
0
GAIN(1:0)
GAIN
00
Low
High
1
10
01
11
xx
Low
High
-
-
Ambient
Level
SSENS Voltage
0h
VoS×0/256
VoS×0/256
VoS×0/256
1h
VoS×1/256
VoS×1/256
VoS×1/256
2h
VoS×2/256
VoS×2/256
VoS×2/256
VoS×3/256
VoS×4/256
VoS×5/256
VoS×7/256
VoS×8/256
VoS×12/256
VoS×13/256
VoS×21/256
VoS×22/256
VoS×37/256
VoS×38/256
VoS×65/256
VoS×66/256
VoS×113/256
VoS×114/256
VoS×199/256
VoS×200/256
VoS×255/256
VoS×3/256
VoS×4/256
VoS×5/256
VoS×7/256
VoS×8/256
VoS×12/256
VoS×13/256
VoS×21/256
VoS×22/256
VoS×37/256
VoS×38/256
VoS×65/256
VoS×66/256
VoS×113/256
VoS×114/256
VoS×199/256
VoS×200/256
VoS×255/256
VoS×3/256
VoS×4/256
VoS×5/256
VoS×6/256
VoS×7/256
VoS×9/256
VoS×10/256
VoS×13/256
VoS×14/256
VoS×19/256
VoS×20/256
VoS×27/256
VoS×28/256
VoS×38/256
VoS×39/256
VoS×53/256
VoS×54/256
VoS×74/256
VoS×75/256
VoS×104/256
VoS×105/256
VoS×144/256
VoS×145/256
VoS×199/256
VoS×200/256
VoS×255/256
3h
4h
5h
VoS×0/256
6h
VoS×1/256
7h
8h
9h
Ah
Bh
Ch
Dh
Eh
Fh
VoS×2/256
VoS×3/256
VoS×4/256
VoS×6/256
VoS×7/256
VoS×11/256
VoS×12/256
VoS×20/256
VoS×21/256
VoS×36/256
VoS×37/256
VoS×64/256
VoS×65/256
VoS×114/256
VoS×115/256
VoS×199/256
VoS×200/256
VoS×255/256
VoS×0/256
VoS×1/256
VoS×2/256
VoS×3/256
VoS×4/256
VoS×6/256
VoS×7/256
VoS×11/256
VoS×12/256
VoS×20/256
VoS×21/256
VoS×36/256
VoS×37/256
VoS×64/256
VoS×65/256
VoS×114/256
VoS×115/256
VoS×199/256
VoS×200/256
VoS×255/256
VoS×0/256
VoS×17/256
VoS×18/256
VoS×26/256
VoS×27/256
VoS×36/256
VoS×37/256
VoS×47/256
VoS×48/256
VoS×59/256
VoS×60/256
VoS×71/256
VoS×72/256
VoS×83/256
VoS×84/256
VoS×95/256
VoS×96/256
VoS×107/256
VoS×108/256
VoS×119/256
VoS×120/256
VoS×131/256
VoS×132/256
VoS×143/256
VoS×144/256
VoS×155/256
VoS×156/256
VoS×168/256
VoS×169/256
VoS×181/256
VoS×182/256
VoS×255/256
・This is in case of not adjustments of the gain/offset control.
・In the Auto Gain control mode, sensor gain changes in gray-colored ambient level.
・“ ⁄ ” : This means that this zone is not outputted in this mode.
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37/51
2011.04 - Rev.A
BD6088GUL
Technical Note
Main LED current
(8) LED current assignment
・LED current can be assigned as each of 16 steps of the ambient level.
・Setting of a user can do by overwriting, though it prepares for the table
setup in advance.
Register : IU*(6:0)
Conversion table
can be changed
Ambient Level
Conversion Table (initial value)
Ambient Level
Setting data
Current value
Ambient Level
Setting data
Current value
0h
1h
2h
3h
4h
5h
6h
7h
11h
13h
15h
18h
1Eh
25h
2Fh
3Bh
3.6mA
4.0mA
4.4mA
5.0mA
6.2mA
7.6mA
9.6mA
12.0mA
8h
9h
Ah
Bh
Ch
Dh
Eh
Fh
48h
56h
5Fh
63h
63h
63h
63h
63h
14.6mA
17.4mA
19.2mA
20.0mA
20.0mA
20.0mA
20.0mA
20.0mA
Current Data which is set
LED Current
Main LED current
(9) Slope process
・Slope process is given to LED current to dim naturally.
・LED current changes in the 256Step gradation in sloping.
・Up(dark→bright),Down(bright→dark) LED current transition speed
are set individually.
Register : THL(3:0)
Register : TLH(3:0)
・Main LED current changes as follows at the time as the slope.
TLH (THL) is setup of time of the current step 2/256.
TLH(3:0)
Up/Down transition Speed
is set individually
TLH
time
Zoom
THL
Main LED current
25.6mA
=0.1mA
256
THL
(3:0)
TLH(3:0)
time
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38/51
2011.04 - Rev.A
BD6088GUL
Technical Note
(10) LED current reset when mode change
・When mode is changed (ALC↔Non ALC),
it can select the way to sloping.
Register : MDCIR
“0” : LED current non-reset when mode change
“1” : LED current reset when mode change
ALC
mode
NonALC
mode
IMLED(6:0)
IMLED(6:0)
IU*(6:0)
MDCIR= “0”
0mA
NonALC
mode
Main LED current
Main LED current
NonALC
mode
ALC
mode
IMLED(6:0)
NonALC
mode
IMLED(6:0)
IU*(6:0)
MDCIR= “1”
0mA
time
time
(11) Current adjustment
・When the register setting permits it, PWM drive by the external terminal (WPWMIN) is possible.
B it Name : WPWMEN
・It is suitable for the intensity correction by external control, because PWM based on Main LED current of register setup or
ALC control.
WPWMEN
(Register)
0
1
WPWMIN(External Pin)
WPWMPOL=H
WPWMPOL=L
(Register)
(Register)
L
H
H
L
L
H
H
L
Main group
LED current
Normal operation
Normal operation
Forced OFF
Normal operation
" Normal operation " depends on the setup of each register.
E N (* )
In te r n a l S o ft-S ta rt T im e
D C /D C
W P W M IN
O u tp u t
in p u t
W PW M E N
L E D C u rre n t
E N (* ) :
it m e a n s “M L E D E N ” o r “W *E N ”.
It is p o s s ib le to m a k e it a W P W M IN in p u t a n d W P W M E N = 1 in fr o n t o f E N (*) .
A P W M d r iv e b e c o m e s e ffe c tiv e a fte r th e tim e o f a n L E D c u rr e n t s ta n d u p .
W h e n r is in g d u rin g P W M o p e ra tio n , a s fo r th e s ta n d u p tim e o f a D C /D C o u tp u t, o n ly th e ra te o f
P W M D u ty b e c o m e s la te . A p p e a r a n c e m a y b e in flu e n c e d w h e n e x tr e m e ly la te fre q u e n c y a n d
e x tre m e ly lo w D u ty a r e in p u tte d .
P le a s e s e c u r e 8 0 μ s o r m o r e o f H s e c tio n s a t th e tim e o f P W M p u ls e F o rc e .
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39/51
2011.04 - Rev.A
BD6088GUL
Technical Note
(12) Key back light 2-value decision
・Capable of comparing luminosity factor data with judgment threshold value
with a hysteresis to determine binary judgment for illumination intensity.
・Available for key backlight ON/OFF control based on illumination intensity.
・Sets a threshold value and a hystresis via the registers.
Bit Name : CTH(3:0)
Bit Name : CHYS(1:0)
Key Back Light ON/OFFControl
ON
The threshold value and hystresis must meet the following condition:
CTH setting  CHYS setting
Detect threshold level,
Hysteresis
setup is possible
OFF
Example: The backlight turns on with an illumination intensity of 7 and turns off with an illumination intensity of 5.
Ambient Level
CTH[3:0]=7h CHYS[1:0]=1h
(13) Key back light PWM control
・Outputs ON or OFF for binary judgment via the KBLT terminal after PWM processing.
・Allows a slope time to be set in the register via PWM.
32 levels of duties prepared as MAX Duty are sequentially stepped at KBSLP time intervals.
Bit name: KBSLP(1:0)
・A PWM cycle can choose 2 value.
Bit name: FPWM
・It can be changed to the single control by the following setup of a register.
The KBSLP(1:0), FPWM setting is effective.
KBEN
KBLT output
0
0
1
Depend on ALC setting
0
1
1
・32 levels Duty ratio (H level section) becomes the following set point.
Step
Duty(%)
Step
Duty(%)
0
16
0.00
25.00
1
17
1.56
28.13
2
18
3.13
31.25
3
19
4.69
34.38
4
20
6.25
37.50
5
21
7.81
40.63
6
22
9.38
45.31
7
23
10.94
50.00
8
24
12.50
56.25
9
25
14.06
62.50
10
26
15.63
68.75
11
12
13
14
15
17.19
18.75
20.31
21.88
23.44
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27
28
29
30
31
75.00
81.25
87.50
93.75
100.00
40/51
100
90
80
70
Dut y r at i o ( %)
KBMD
60
50
40
30
20
10
0
0
5
10
15
20
25
30
The number of s t ep' s
2011.04 - Rev.A
BD6088GUL
Technical Note
KBEN
KBLT DUTY
Expansion
t= time per 1step×32
ｔ
KBEN
Duty=1.56%(At the time of step 1)
Duty=93.75%(At the time of step 30)
FPWM
Expansion
KBLT
Step
OUTSLP(1:0)
OFF
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0
1
41/51
･･････
301
31
2011.04 - Rev.A
BD6088GUL
Technical Note
●OUT PWM Control
・PWM A fixed signal is output from OUT1 ~ 4 terminal.
・Allows a slope time to be set in the register via PWM.
32 levels of duties prepared as MAX Duty are sequentially stepped at OUTSLP time intervals.
Bit name: OUTSLP(1:0)
・A PWM cycle can choose 2 value.
Bit name: FPWM
・Forced OFF is made with an OUTCNT terminal.
Bit name: OUT*MD
OUT*MD
0
OUT*EN
0
OUTCNT
-
OUT*出力
After the PWM slope, Hi-z (Duty 0%)
1
-
After the PWM slope, L (Duty 100%)
0
1
0
1
Hi-z (LED is compulsory lights off)
Hi-z(Duty0%) *1
Hi-z (LED is compulsory lights off
L (Duty100%) *
0
1
1
*1 But, Duty in the middle of the PWM slope is output at the time as the PWM slope by OUT*EN.
OUT*
OUT*EN
0
PWM
Slope circuit
1
OUTCNT
OUT*MD
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42/51
2011.04 - Rev.A
BD6088GUL
Technical Note
①Setup of a slope (Except for OUTSLP [1:0] =00h)
1
OUT*MD
0
1
OUT*EN
0
1
OUTCNT
0
Duty(100%)
OUT*DUTY
Duty(0%)
Lights off (Hi-z)
OUT* terminal
Lights on(L)
PWM operate
Slope by OUTCNT is nothing.
(It is done ON/OFF promptly.)
OUT*DUTY show the H section of the output step NMOS gate. (Duty 0%~100 %)
②Slope setup nothing (OUTSLP[1:0]=00h)
1
OUT*MD
0
1
OUT*EN
0
1
OUTCNT
0
Duty(100%)
OUT*DUTY
Duty(0%)
Light off (Hi-z)
OUT* terminal
Light on(L)
OUT*DUTY shows the H section of the output step NMOS gate. (Duty 0%~100%)
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43/51
2011.04 - Rev.A
BD6088GUL
Technical Note
・32 levels Duty ratio (H level section) becomes the following set point.
Duty(%)
0.00
1.56
3.13
4.69
6.25
7.81
9.38
10.94
12.50
14.06
15.63
17.19
18.75
20.31
21.88
23.44
Step
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
Duty(%)
25.00
28.13
31.25
34.38
37.50
40.63
45.31
50.00
56.25
62.50
68.75
75.00
81.25
87.50
93.75
100.00
100
90
80
70
Dut y r at i o ( %)
Step
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
60
50
40
30
20
10
0
0
5
10
15
20
25
30
The number of s t ep' s
OUT*E N
OUT*D UTY
E xpansion
ｔ
t= tim e per 1step×32
OUT*E N
D uty=1.56%(A t the time of step 1)
Duty=93.75%(At the time of step 32)
FPW M
E xpansion
OUT*
OUTSLP(1:0)
Step
OFF
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© 2011 ROHM Co., Ltd. All rights reserved.
0
1
44/51
･･････
30
31
2011.04 - Rev.A
BD6088GUL
Technical Note
●I/O
When the RESETB pin is Low, the input buffers (SDA and SCL) are disabling for the Low consumption power.
When RESETB=L, output is fixed at “H.”
SCL
(SDA)
Level shifter
Logic
EN
RESETB
Special care should be taken because a current path may be formed via a terminal protection diode, depending on an I/O
power-on sequence or an input level.
●About the pin management of the function that isn't used and test pins
Setting it as follows is recommended with the test pin and the pin which isn't used.
Set up pin referring to the “Equivalent circuit diagram” so that there may not be a problem under the actual use.
T1
Short to GND because pin for test GND
T2, T4
Short to GND because pin for test input
T3
OUT1～4
OPEN because pin for test output
Short to GND (Must)
But, the setup of a register concerned with LED that isn’t used is prohibited.
Short to ground
(A Pull-Down resistance built-in terminal is contained, too.)
It opens for an output
KBLT
Although Pull-Down is built in, it opens for an output.
Non-used LED Pin
WPWMIN, OUTCNT
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45/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Operation Settings (Flow Example)
1. Backlight: Auto luminous Mode
Apply supply voltage.
Cancel reset.
The backlight settings can be made at any timing
so long as it precedes MLEDEN=1.
MLEDMD=1 is mandatory.
Luminous control: Various
settings
Backlight: Various settings
ALC block operation takes place for
Illumination Intensity measurement.
ALCEN=1
Wait for 80.4 ms or more
Time required for initial Illumination
Intensity acquisition.
MLEDEN=1
The backlight turns on.
MLEDEN=0 must be set first when the backlight is off.
ALC EN
AD C Y C (1:0)
A D C C ycle
SB IA S
O utput
T wait= 64m s(typ)
W hen SB IA SO N =1
AD C M ovem ent
T AD = 16.4m s(typ)
G C 1, G C 2
G C 1, G C 2=00
A M B (3:0)
AM B (3:0)
T A M B= 80.4m s(typ)
VO UT
LED current
①
T SO FT
When It cannot wait for the first illumination measurement, backlight lighting is possible with ALCEN.
But the extremely short case of slope rise time, a shoulder may be done like ① for an LED electric current.
(To the first illumination measurement for AMB(3:0)=00h)
2. Backlight: Fade-in/Fade-out
Apply supply voltage.
Cancel reset.
Backlight: Various settings
Backlight setting.
Slow time setting.
MLEDEN=1
The backlight turns on.
(Rise at designated slope time)
Set the minimum current.
(Rise at designated slope time)
MLEDEN=0
The backlight turns off.
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46/51
2011.04 - Rev.A
BD6088GUL
Technical Note
3. Backlight: Un-auto luminous Mode
Apply supply voltage.
Cancel reset.
Backlight: Various settings
The backlight settings can be made at any timing
so long as it precedes MLEDEN=1.
MLEDMD=0 is mandatory.
The backlight turns on.
MLEDEN=1
MLEDEN=0 must be set first when the backlight is off.
M LE D EN
V O UT
LED current
T SO FT
The rise time depends on TLH(3:0) setting
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© 2011 ROHM Co., Ltd. All rights reserved.
47/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●PCB pattern of the Power dissipation measuring board
st
1 layer(component)
2nd layer
3rd layer
4th layer
5th layer
6th layer
th
7 layer
8th layer(solder)
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48/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Notes for use
(1) Absolute Maximum Ratings
An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can
break down devices, thus making impossible to identify breaking mode such as a short circuit or an open circuit. If any
special mode exceeding the absolute maximum ratings is assumed, consideration should be given to take physical safety
measures including the use of fuses, etc.
(2) Power supply and ground line
Design PCB pattern to provide low impedance for the wiring between the power supply and the ground lines. Pay
attention to the interference by common impedance of layout pattern when there are plural power supplies and ground
lines. Especially, when there are ground pattern for small signal and ground pattern for large current included the external
circuits, please separate each ground pattern. Furthermore, for all power supply pins to ICs, mount a capacitor between
the power supply and the ground pin. At the same time, in order to use a capacitor, thoroughly check to be sure the
characteristics of the capacitor to be used present no problem including the occurrence of capacity dropout at a low
temperature, thus determining the constant.
(3) Ground voltage
Make setting of the potential of the ground pin so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no pins are at a potential lower than the ground voltage including an actual electric transient.
(4) Short circuit between pins and erroneous mounting
In order to mount ICs on a set PCB, pay thorough attention to the direction and offset of the ICs. Erroneous mounting can
break down the ICs. Furthermore, if a short circuit occurs due to foreign matters entering between pins or between the
pin and the power supply or the ground pin, the ICs can break down.
(5) Operation in strong electromagnetic field
Be noted that using ICs in the strong electromagnetic field can malfunction them.
(6) Input pins
In terms of the construction of IC, parasitic elements are inevitably formed in relation to potential. The operation of the
parasitic element can cause interference with circuit operation, thus resulting in a malfunction and then breakdown of the
input pin. Therefore, pay thorough attention not to handle the input pins, such as to apply to the input pins a voltage lower
than the ground respectively, so that any parasitic element will operate. Furthermore, do not apply a voltage to the input
pins when no power supply voltage is applied to the IC. In addition, even if the power supply voltage is applied, apply to
the input pins a voltage lower than the power supply voltage or within the guaranteed value of electrical characteristics.
(7) External capacitor
In order to use a ceramic capacitor as the external capacitor, determine the constant with consideration given to a
degradation in the nominal capacitance due to DC bias and changes in the capacitance due to temperature, etc.
(8) Thermal shutdown circuit (TSD)
This LSI builds in a thermal shutdown (TSD) circuit. When junction temperatures become detection temperature or higher,
the thermal shutdown circuit operates and turns a switch OFF. The thermal shutdown circuit, which is aimed at isolating
the LSI from thermal runaway as much as possible, is not aimed at the protection or guarantee of the LSI. Therefore, do
not continuously use the LSI with this circuit operating or use the LSI assuming its operation.
(9) Thermal design
Perform thermal design in which there are adequate margins by taking into account the permissible dissipation (Pd) in
actual states of use.
(10) LDO
Use each output of LDO by the independence. Don’t use under the condition that each output is short-circuited because it
has the possibility that an operation becomes unstable.
(11) About the pin for the test, the un-use pin
Prevent a problem from being in the pin for the test and the un-use pin under the state of actual use. Please refer to a
function manual and an application notebook. And, as for the pin that doesn't specially have an explanation, ask our
company person in charge.
(12) About the rush current
For ICs with more than one power supply, it is possible that rush current may flow instantaneously due to the internal
powering sequence and delays. Therefore, give special consideration to power coupling capacitance, power wiring, width
of ground wiring, and routing of wiring.
(13) About the function description or application note or more.
The function description and the application notebook are the design materials to design a set. So, the contents of the
materials aren't always guaranteed. Please design application by having fully examination and evaluation include the
external elements.
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49/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Power dissipation (On the ROHM’s standard board)
1.6
1380mW
Power Dissipation Pd （W)
1.4
Information of the ROHM’s standard board
Material : glass-epoxy
Size : 50mm×58mm×1.75mm(8th layer)
Wiring pattern figure Refer to after page.
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
25
50
75
100
125
150
Ta（℃）
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50/51
2011.04 - Rev.A
BD6088GUL
Technical Note
●Ordering part number
B
D
6
Part No.
0
8
8
G
Part No.
6088
U
L
Package
GUL : VCSP50L3
-
E
2
Packaging and forming specification
E2: Embossed tape and reel
VCSP50L3(BD6088GUL)
A
(φ0.15)INDEX POST
F
E
D
C
B
A
Embossed carrier tape
Quantity
2500pcs
Direction
of feed
E2
The direction is the 1pin of product is at the upper left when you hold
( reel on the left hand and you pull out the tape on the right hand
B
1 2 3 4 5 6
0.50±0.05
)
P=0.50× 5
0.06 S
36- φ 0.25±0.05
0.05 A B
S
Tape
0.50± 0.05
3.50±0.05
0.55MAX
3.50± 0.05
1PIN MARK
0.1± 0.05
<Tape and Reel information>
1pin
P=0.50×5
(Unit : mm)
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Reel
51/51
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2011.04 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any
of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
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R1120A