BD6088GUL_11_技术文档

LED Driver s for LCD Backlights

Mulitifunction Backlight LED Driver

for Small LCD Panels (Charge Pump Type)

No.11040EAT29

BD6088GUL

●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

Symbol

Ratings

Unit

VMAX

Pd

7

V

mW

℃

Power Dissipation

1380 ^(note

Operating Temperature Range

Storage Temperature Range

Topr

Tstg

-30 ～ +85

-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)

●Operating conditions (VBAT≥VIO, Ta=-35~85 ^oC)

Parameter

VBAT input voltage

VIO pin voltage

Symbol

Ratings

Unit

VBAT

VIO

2.7 ～ 5.5

V

1.65 ～ 3.3

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BD6088GUL

Technical Note

●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V)

Limits

Parameter

【Circuit Current】

Symbol

Unit

Condition

Min.

Typ.

Max.

VBAT Circuit current 1

VBAT Circuit current 2

VBAT Circuit current 3

VBAT Circuit current 4

VBAT Circuit current 5

IBAT1

IBAT2

IBAT3

IBAT4

IBAT5

-

0.1

0.5

61

3.0

65

μA

RESETB=0V, VIO= 0V

RESETB=0V, VIO=2.6V

DC/DC x1 mode, Io=60mA

VBAT=4.0V

mA

DC/DC x1.5 mode, Io=60mA

VBAT=3.6V

92

102

140

DC/DC x2 mode, Io=60mA

VBAT=2.7V

123

ALC Operating

ALCEN=1, AD cycle=0.5s setting

Except sensor current

VBAT Circuit current 6

IBAT6

-

0.25

1.0

mA

【LED Driver】

LED current Step (Setup)

ILEDSTP1

ILEDSTP2

IMAXWLED

IWLED

128

256

25.6

15

-

Step

mA

%

LED1~6

LED current Step (At slope)

LED Maximum setup current

LED current accuracy

LED1~6

-

+7%

4

LED1~6

-7%

I_LED=15mA setting, VLED=1.0V

Between LED1~6

at VLED=1.0V, ILED=15mA

LED current Matching

ILEDMT

-

LED OFF Leak current

【DC/DC(Charge Pump)】

Output Voltage 1

ILKLED

-

1.0

μA

VLED=4.5V

VoCP1

VoCP2

-

Vf+0.2 Vf+0.25

V

Vf is forward direction of LED

3.705

3.99

3.9

4.2

4.5

4.8

4.095

4.41

V

Fixation Voltage Output

ModeIo=60mA

VBAT≧3.2V

Output Voltage 2

4.275

4.56

4.725

5.04

Drive ability

IOUT

fosc

-

0.8

-

150

1.2

mA

MHz

V

VBAT≥3.2V, VOUT=3.9V

Switching frequency

1.0

6.0

250

Over Voltage

Protection detect voltage

OVP

OCP

6.5

375

Over Current

Protection detect Current

-

mA

VOUT=0V

【Sensor Interface】

2.85

2.47

3.0

2.6

3.15

2.73

V

Io=200µA

SBIAS Output Voltage

VoS

SBIAS Maximum Output current

SBIAS Discharge resister at OFF

SSENS Input range

IomaxS

ROFFS

VISS

30

-

1.0

-

mA

kΩ

Vo=2.6V setting

1.5

VoS×

0

V

255/256

ADC resolution

ADRES

ADINL

ADDNL

8

bit

ADC integral calculus non-linearity

-3

-1

-

+3

+1

LSB

ADC differential calculus

non-linearity

-

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BD6088GUL

Technical Note

●Electrical Characteristics (Unless otherwise specified, Ta=25°C, VBAT=3.6V, VIO=2.6V)

Limits

Parameter

Symbol

Unit

Condition

Min.

Typ.

Max.

【SDA, SCL】 (I²C Interface)

0.25 ×

VIO

L level input voltage

VILI

VIHI

VhysI

VOLI

linI

-0.3

-

V

0.75 ×

VIO

VBAT

+0.3

H level input voltage

0.05 ×

VIO

Hysteresis of Schmitt trigger input

L level output voltage

-

0.3

1

V

0

-

V

SDA Pin, IOL=3 mA

Input Voltage

= 0.1×VIO～0.9×VIO

Input current

μA

【RESETB】 (CMOS Input Pin)

L level input voltage

0.25 ×

VIO

VILR

VIHR

IinR

-0.3

-

V

0.75 ×

VIO

VBAT

+0.3

H level input voltage

Input Voltage

= 0.1×VIO～0.9×VIO

Input current

-

1

μA

【WPWMIN】 (NMOS Input Pin)

L level input voltage

VILA

VIHA

IinA

-0.3

1.4

-

0.3

V

VBAT

+0.3

H level input voltage

Input Current

Input Voltage

= 0.1×VBAT～0.9×VBAT

1

-

μA

μs

PWM input minimum High pulse

width

PWmin

80

WPWMIN Pin

【OUTCNT】 (Pull-down resistance NMOS Input Pin)

L level input voltage

H level input voltage

Input Current

VILA

VIHA

IinA

-0.3

1.4

-

0.3

V

VBAT

+0.3

3.6

10

μA

Vin=1.8V

【OUT1～4】 ( NMOS Open Drain Output Pin)

L level output voltage

Output Leak current

VOLG

ILKG

-

0.3

1.0

V

IOL=10mA

Vout=3.6V

μA

【GC1, GC2】 (Sensor Gain Control CMOS Output Pin)

L level output voltage

H level output voltage

VOLS

VOHS

-

0.2

-

V

IOL=1mA

IOH=1mA

VoS

-0.2

【KBLT】 (Key Back Light Control CMOS Output Pin)

L level output voltage

H level output voltage

Pull-downregistance

VOLK

VOHK

-

0.2

-

V

IOL=1mA

IOH=1mA

Vin=3.3V

VIO

-0.2

RPUDK

-

1.0

2.0

MΩ

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BD6088GUL

Technical Note

●Block Diagram / Application Circuit example 1

1μF

VBAT

VBATCP

VOUT

VBAT1

Charge Pump

x1 / x1.5 / x2

1μF

10µF

LED1

LED2

LED3

LED4

LED5

OVP

Charge Pump

Mode Control

LED terminal voltage feedback

Main Back Light

VIO

(

)

(

)(

RESETB

LED6

SCL

SDA

TSD

Level

Shift

I²C interface

I/O

LEDGND

Digital Control

VBAT

Key Pad

LED

WPWMIN

OUTCNT

IREF

・・

KBLT

Key

Control

VREF

SBIAS

Photo IC

VBAT

VDD

GND

IOUT

1μF

GC1

GC2

SSENS

SGND

OUT1

OUT2

OUT3

Sensor

I/F

LED

control

BH1600FVC

Slope

Control

Slope

Control

GPO

Slope

GC2

GC1

Control

OUT4

Slope

Control

ALC

Fig.1 Block Diagram / Application Circuit example 1

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BD6088GUL

Technical Note

●Block Diagram / Application Circuit example 2

1μF

VBAT

VBATCP

VOUT

VBAT1

Charge Pump

x1 / x1.5 / x2

1μF

10µF

LED1

LED2

LED3

LED4

OVP

Charge Pump

Mode Control

4ch

LED terminal voltage feedback

Main Back Light

VIO

(

)

(

)(

RESETB

LED5

LED6

SCL

SDA

2ch

TSD

Sub Back Light

Level

Shift

I²C interface

I/O

Digital Control

LEDGND

VBAT

Key Pad

LED

WPWMIN

OUTCNT

IREF

・・

KBLT

Key

Control

VREF

SBIAS

Photo IC

VBAT

VDD

GND

IOUT

1μF

GC1

GC2

SSENS

SGND

OUT1

OUT2

OUT3

Sensor

I/F

LED

control

BH1600FVC

Slope

Control

Slope

Control

GPO

Slope

GC2

GC1

Control

OUT4

Slope

Control

ALC

Fig.2 Block Diagram / Application Circuit example 2

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BD6088GUL

Technical Note

●Pin Arrangement ［Bottom View］

T3

F

E

D

C

B

A

T4

SSENS

GC1

SGND

GC2

VBAT1

SDA

VIO

OUT2

OUT3

C1P

6 x 6 Ball

SBIAS

LED5

OUT4

VOUT

C2P

LED6

SCL

OUT1

LEDGND LED4 OUTCNT WPWMIN

LED2

T1

LED3 RESETB

KBLT

C1N

C2N

VBATCP

T2

LED1

GND1

CPGND

INDEX

○

1

2

3

4

5

6

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BD6088GUL

Technical Note

●Package

VCSP50L3

CSP small package

SIZE : 3.50mm×3.50mm(A difference in public：X,Y Both ±0.05mm) Height : 0.55mm max

A ball pitch : 0.5 mm²

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BD6088GUL

Technical Note

●Pin Functions

ESD Diode

Equivalent

Circuit

No Ball No. Pin Name

I/O

Functions

Battery is connected

For Power For Ground

1

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

-

GND

-

A

B

S

M

S

C

H

I

2

-

Battery is connected

3

I

VBAT

-

Test Ground Pin(short to Ground)

Test Input Pin (short to Ground)

Test Output Pin(Open)

4

T2

I

GND

-

5

T3

O

I

6

T4

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

7

VIO

-

8

RESETB

SDA

I

9

I/O

I

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

SCL

H

B

F

CPGND

GND1

LEDGND

C1N

-

Ground

-

Ground

-

Charge Pump capacitor is connected

I/O

O

I

GND

-

C1P

G

F

C2N

VBAT

-

C2P

G

A

E

Q

N

X

B

U

V

L

VOUT

LED1

LED2

LED3

LED4

LED5

LED6

SBIAS

SSENS

GC1

-

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

I

-

I

-

I

-

I

-

I

-

O

I

VBAT

-

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

O

-

GC2

SGND

OUT1

OUT2

OUT3

OUT4

WPWMIN

OUTCNT

KBLT

O

I

GND

General Output Port 1

-

General Output Port 1

-

General Output Port 1

-

General Output Port 1

VBAT

External PWM input for Back Light *

OUT1,2,3,4 Output Control (L:OFF) *

Key Back Light Control Output

I

O

W

* A setup of a register is separately necessary to make it effective.

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BD6088GUL

●Equivalent Circuit

A

Technical Note

B

G

L

VBAT

C

VBAT

E

F

VBAT

H

I

VBAT

VIO

VBAT

VIO

J

VBAT

VIO

VBAT

VIO

M ^VBAT

VBAT

N

U

Y

VBAT

Q ^VBAT

VBAT

R ^VBAT

S

VBAT

V

VBAT

W VBAT

VIO

VBAT

X

VoS

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BD6088GUL

Technical Note

●I²C BUS format

The writing/reading operation is based on the I²C slave standard.

・Slave address

A7

1

A6

1

A5

1

A4

0

A3

1

A2

1

A1

0

R/W

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

Data are effective

SDA

It can change

：

・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

1

2

8

9

SCL

S

clock pulse for

acknowledgement

START condition

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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

0

A A7 A6 A5 A4 A3 A2 A1 A0 A D7D6D5D4D3D2D1D0 A

register address

DATA

D7D6D5 D4D3D2D1D0 A

DATA

P

S

X

slave address

register address

increment

register address

increment

R/W=0(write)

A=acknowledge(SDA LOW)

A=not acknowledge(SDA HIGH)

S=START condition

from master to slave

from slave to master

P=STOP condition

*1: Write Timing

・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

1

A D7 D6 D5 D4 D3 D2 D1 D0 A

DATA

D7 D6 D5 D4 D3 D2 D1 D0 A

DATA

P

X

X X X X X X

slave address

register address

increment

register address

increment

R/W=1(read)

A=acknowledge(SDA LOW)

A=not acknowledge(SDA HIGH)

S=START condition

from master to slave

from slave to master

P=STOP condition

・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

A

A Sr

1 A

X X X X X X X

slave address

0

A7A6A5A4A3A2A1A0

register address

X X X X X X X

slave address

R/W=0(write)

R/W=1(read)

A

P

D7D6D5D4D3D2D1D0 A

DATA

D7D6D5D4D3D2D1D0

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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BD6088GUL

Technical Note

●Timing diagram

SDA

t BUF

t SU;DAT

t HD;STA

t LOW

SCL

t SU;STO

t SU;STA

t HD;STA

t HD;DAT

S

Sr

P

S

t HIGH

●Electrical Characteristics(Unless otherwise specified, Ta=25 ^oC, VBAT=3.6V, VIO=2.6V)

Standard-mode

Fast-mode

Typ.

Parameter

【I²C BUS format】

Symbol

Unit

Min.

Typ.

Max.

Min.

Max.

SCL clock frequency

fSCL

tLOW

tHIGH

0

-

100

0

-

400

kHz

μs

LOW period of the SCL clock

HIGH period of the SCL clock

4.7

4.0

-

1.3

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

Data hold time

tSU;STA

tHD;DAT

tSU;DAT

tSU;STO

4.7

0

-

0.6

0

-

0.9

-

μs

ns

μs

3.45

Data set-up time

250

4.0

-

100

0.6

Set-up time for STOP condition

-

Bus free time between a STOP and START

condition

tBUF

4.7

-

1.3

-

μs

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BD6088GUL

Technical Note

●Register List

Register data

Address W/R

Function

D7

VOUT(1)

D6

D5

D4

D3

-

D2

-

D1

-

D0

Software Reset

DC/DC function setting

00h

01h

02h

03h

04h

05h

06h

07h

08h

09h

0Ah

0Bh

0Ch

0Dh

0Eh

0Fh

10h

11h

12h

13h

14h

15h

16h

17h

18h

19h

1Ah

1Bh

W

W/R

W

R

VOUT(0)

DCDCMD DCDCFON

SFTRST

MLEDMD

MLEDEN

IMLED(0)

IW5(0)

WPWMEN WPWMPOL

-

W6MD

ALCEN

IMLED(3)

IW5(3)

IW6(3)

TLH (3)

STYPE

W5MD

W6EN

IMLED(2)

IW5(2)

IW6(2)

TLH (2)

VSB

W4MD

W5EN

IMLED(1)

IW5(1)

IW6(1)

TLH (1)

MDCIR

LED Pin function setting

-

Power Control

-

IMLED(6)

IW5(6)

IW6(6)

THL (2)

IMLED(5)

IW5(5)

IW6(5)

THL (1)

GAIN (1)

SOFS (1)

-

IMLED(4)

IW5(4)

IW6(4)

THL (0)

GAIN(0)

SOFS (0)

-

Main group current setting

LED5 current setting

-

IW6(0)

LED6 current setting

THL (3)

TLH (0)

SBIASON

Main Current transition

Measurement mode setting

Measurement data adjustment

ADCYC (1) ADCYC (0)

SOFS (3)

SOFS (2)

-

SGAIN (3) SGAIN (2) SGAIN (1) SGAIN (0)

-

AMB (3)

IU0 (3)

IU1 (3)

IU2 (3)

IU3 (3)

IU4 (3)

IU5 (3)

IU6 (3)

IU7 (3)

IU8 (3)

IU9 (3)

IUA (3)

IUB (3)

IUC (3)

IUD (3)

IUE (3)

IUF (3)

CTH (3)

OUT4MD

OUT4EN

KBSLP(1)

AMB (2)

IU0 (2)

IU1 (2)

IU2 (2)

IU3 (2)

IU4 (2)

IU5 (2)

IU6 (2)

IU7 (2)

IU8 (2)

IU9 (2)

IUA (2)

IUB (2)

IUC (2)

IUD (2)

IUE (2)

IUF (2)

CTH (2)

OUT3MD

OUT3EN

AMB (1)

IU0 (1)

IU1 (1)

IU2 (1)

IU3 (1)

IU4 (1)

IU5 (1)

IU6 (1)

IU7 (1)

IU8 (1)

IU9 (1)

IUA (1)

IUB (1)

IUC (1)

IUD (1)

IUE (1)

IUF (1)

CTH (1)

OUT2MD

OUT2EN

AMB (0) Ambient level

W

-

IU0 (6)

IU1 (6)

IU2 (6)

IU3 (6)

IU4 (6)

IU5 (6)

IU6 (6)

IU7 (6)

IU8 (6)

IU9 (6)

IUA (6)

IUB (6)

IUC (6)

IUD (6)

IUE (6)

IUF (6)

-

IU0 (5)

IU1 (5)

IU2 (5)

IU3 (5)

IU4 (5)

IU5 (5)

IU6 (5)

IU7 (5)

IU8 (5)

IU9 (5)

IUA (5)

IUB (5)

IUC (5)

IUD (5)

IUE (5)

IUF (5)

CHYS (1)

-

IU0 (4)

IU1 (4)

IU2 (4)

IU3 (4)

IU4 (4)

IU5 (4)

IU6 (4)

IU7 (4)

IU8 (4)

IU9 (4)

IUA (4)

IUB (4)

IUC (4)

IUD (4)

IUE (4)

IUF (4)

CHYS (0)

KBMD

KBEN

-

IU0 (0)

IU1 (0)

IU2 (0)

IU3 (0)

IU4 (0)

IU5 (0)

IU6 (0)

IU7 (0)

IU8 (0)

IU9 (0)

IUA (0)

IUB (0)

IUC (0)

IUD (0)

IUE (0)

IUF (0)

CTH (0)

LED Current at Ambient level 0h

LED Current at Ambient level 1h

LED Current at Ambient level 2h

LED Current at Ambient level 3h

LED Current at Ambient level 4h

LED Current at Ambient level 5h

LED Current at Ambient level 6h

LED Current at Ambient level 7h

LED Current at Ambient level 8h

LED Current at Ambient level 9h

LED Current at Ambient level Ah

LED Current at Ambient level Bh

LED Current at Ambient level Ch

LED Current at Ambient level Dh

LED Current at Ambient level Eh

LED Current at Ambient level Fh

-

Key driver 2 Value

judging control setup

-

OUT1MD OUT, KBLT Output Mode setting

OUT1EN OUT, KBLT Output Control

1Ch W/R

1Dh

-

W

FPWM

-

KBSLP(0) 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

2011.04 - Rev.A

13/51

BD6088GUL

Technical Note

●Register Map

Address 00h < Software Reset , DC/DC function setting >

Address

R/W

Bit7

Bit6

Bit5

Bit4

Bit3

-

Bit2

-

Bit1

-

Bit0

00h

W

VOUT(1)

VOUT(0) DCDCMD DCDCFON

SFTRST

Initial

Value

00h

0

-

0

Bit [7:6] : VOUT (1:0)

VOUT Output Voltage setting

VOUT Output Voltage 3.9V

VOUT Output Voltage 4.2V

VOUT Output Voltage 4.5V

“00” :

“01” :

“10” :

“11” :

VOUT Output Voltage 4.8V

Bit [5:4] : DCDCMD, DCDCFON

LED Pin Return

DC/DC setting

“00” :

“01” :

“10” :

“11” :

Depend on LED ON/OFF

Compulsion ON

LEDPin Return

Output Voltage Fixation

Bit [3:1] : (Not used)

Bit0 :

SFTRST Software Reset

“0” :

“1” :

Reset cancel

Reset(All register initializing)

Refer to “The explanation of Reset” for detail.

www.rohm.com

2011.04 - Rev.A

14/51

BD6088GUL

Technical Note

Address 01h < LED Pin function setting>

Address

R/W

Bit7

Bit6

Bit5

-

Bit4

-

Bit3

Bit2

Bit1

Bit0

01h

W

WPWMEN WPWMPOL

W6MD

W5MD

W4MD

MLEDMD

Initial

Value

42h

0

1

-

0

1

0

Bit7 :

WPWMEN

“0” :

“1” :

External PWM Input “WPWMIN” terminal Enable Control (Valid/Invalid)

External PWM input invalid

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

External PWM ’L’ drive

External PWM ’H’ drive

“0” :

“1” :

Refer to “(11) Current Adjustment” of “The explanation of ALC” for detail.

Bit [5:4] : (Not used)

Bit3 :

Bit2 :

Bit1 :

Bit0 :

W6MD

“0” :

LED6 control setting (individual / Main group)

LED6 individual control

“1” :

LED6 Main group control

Refer to “LED Driver” for detail.

W5MD

“0” :

LED5 control setting (individual / Main group)

LED5 individual control

“1” :

LED5 Use (Main group)

Refer to “LED Driver” for detail.

W4MD

“0” :

LED4 movement setting (unuse / use)

LED4 unuse

“1” :

LED4 use (Main group Control)

Refer to “LED Driver” for detail.

MLEDMD Main group setting (Normal / ALC)

“0” :

“1” :

Main group Normal Mode(ALCNon-reflection)

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

2011.04 - Rev.A

15/51

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

Bit [7:4] : (Not used)

Bit3 :

Bit2 :

Bit1 :

Bit0 :

ALCEN

“0” :

ALC function Control (ON/OFF)

ALC block OFF

“1” :

ALC block ON (Ambient Measurement)

W6EN

“0” :

LED6 Control (ON/OFF)

LED6 OFF

“1” :

LED6 ON(individual control)

W5EN

“0” :

LED5 Control (ON/OFF)

LED5 OFF

“1” :

LED5 ON(individual control)

MLEDEN

“0” :

Main group LED Control (ON/OFF)

Main group OFF

“1” :

Main group ON

www.rohm.com

2011.04 - Rev.A

16/51

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

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” :

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

“1000000” : 13.0 mA

“1000001” : 13.2 mA

“1000010” : 13.4 mA

“1000011” : 13.6 mA

“1000100” : 13.8 mA

“1000101” : 14.0 mA

“1000110” : 14.2 mA

“1000111” : 14.4 mA

“1001000” : 14.6 mA

“1001001” : 14.8 mA

“1001010” : 15.0 mA

“1001011” : 15.2 mA

“1001100” : 15.4 mA

“1001101” : 15.6 mA

“1001110” : 15.8 mA

“1001111” : 16.0 mA

“1010000” : 16.2 mA

“1010001” : 16.4 mA

“1010010” : 16.6 mA

“1010011” : 16.8 mA

“1010100” : 17.0 mA

“1010101” : 17.2 mA

“1010110” : 17.4 mA

“1010111” : 17.6 mA

“1011000” : 17.8 mA

“1011001” : 18.0 mA

“1011010” : 18.2 mA

“1011011” : 18.4 mA

“1011100” : 18.6 mA

“1011101” : 18.8 mA

“1011110” : 19.0 mA

“1011111” : 19.2 mA

“1100000” : 19.4 mA

“1100001” : 19.6 mA

“1100010” : 19.8 mA

“1100011” : 20.0 mA

“1100100” : 20.2 mA

“1100101” : 20.4 mA

“1100110” : 20.6 mA

“1100111” : 20.8 mA

“1101000” : 21.0 mA

“1101001” : 21.2 mA

“1101010” : 21.4 mA

“1101011” : 21.6 mA

“1101100” : 21.8 mA

“1101101” : 22.0 mA

“1101110” : 22.2 mA

“1101111” : 22.4 mA

“1110000” : 22.6 mA

“1110001” : 22.8 mA

“1110010” : 23.0 mA

“1110011” : 23.2 mA

“1110100” : 23.4 mA

“1110101” : 23.6 mA

“1110110” : 23.8 mA

“1110111” : 24.0 mA

“1111000” : 24.2 mA

“1111001” : 24.4 mA

“1111010” : 24.6 mA

“1111011” : 24.8 mA

“1111100” : 25.0 mA

“1111101” : 25.2 mA

“0110001” : 10.0 mA

“0110010” : 10.2 mA

“0110011” : 10.4 mA

“0110100” : 10.6 mA

“0110101” : 10.8 mA

“0110110” : 11.0 mA

“0110111” : 11.2 mA

“0111000” : 11.4 mA

“0111001” : 11.6 mA

“0111010” : 11.8 mA

“0111011” : 12.0 mA

“0111100” : 12.2 mA

“0111101” : 12.4 mA

“0111110” :

“0111111” :

12.6 mA

12.8 mA

“1111110” :

“1111111” :

25.4 mA

25.6 mA

www.rohm.com

2011.04 - Rev.A

17/51

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

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” :

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

“1000000” : 13.0 mA

“1000001” : 13.2 mA

“1000010” : 13.4 mA

“1000011” : 13.6 mA

“1000100” : 13.8 mA

“1000101” : 14.0 mA

“1000110” : 14.2 mA

“1000111” : 14.4 mA

“1001000” : 14.6 mA

“1001001” : 14.8 mA

“1001010” : 15.0 mA

“1001011” : 15.2 mA

“1001100” : 15.4 mA

“1001101” : 15.6 mA

“1001110” : 15.8 mA

“1001111” : 16.0 mA

“1010000” : 16.2 mA

“1010001” : 16.4 mA

“1010010” : 16.6 mA

“1010011” : 16.8 mA

“1010100” : 17.0 mA

“1010101” : 17.2 mA

“1010110” : 17.4 mA

“1010111” : 17.6 mA

“1011000” : 17.8 mA

“1011001” : 18.0 mA

“1011010” : 18.2 mA

“1011011” : 18.4 mA

“1011100” : 18.6 mA

“1011101” : 18.8 mA

“1011110” : 19.0 mA

“1011111” : 19.2 mA

“1100000” : 19.4 mA

“1100001” : 19.6 mA

“1100010” : 19.8 mA

“1100011” : 20.0 mA

“1100100” : 20.2 mA

“1100101” : 20.4 mA

“1100110” : 20.6 mA

“1100111” : 20.8 mA

“1101000” : 21.0 mA

“1101001” : 21.2 mA

“1101010” : 21.4 mA

“1101011” : 21.6 mA

“1101100” : 21.8 mA

“1101101” : 22.0 mA

“1101110” : 22.2 mA

“1101111” : 22.4 mA

“1110000” : 22.6 mA

“1110001” : 22.8 mA

“1110010” : 23.0 mA

“1110011” : 23.2 mA

“1110100” : 23.4 mA

“1110101” : 23.6 mA

“1110110” : 23.8 mA

“1110111” : 24.0 mA

“1111000” : 24.2 mA

“1111001” : 24.4 mA

“1111010” : 24.6 mA

“1111011” : 24.8 mA

“1111100” : 25.0 mA

“1111101” : 25.2 mA

“0110001” : 10.0 mA

“0110010” : 10.2 mA

“0110011” : 10.4 mA

“0110100” : 10.6 mA

“0110101” : 10.8 mA

“0110110” : 11.0 mA

“0110111” : 11.2 mA

“0111000” : 11.4 mA

“0111001” : 11.6 mA

“0111010” : 11.8 mA

“0111011” : 12.0 mA

“0111100” : 12.2 mA

“0111101” : 12.4 mA

“0111110” :

“0111111” :

12.6 mA

12.8 mA

“1111110” :

“1111111” :

25.4 mA

25.6 mA

www.rohm.com

2011.04 - Rev.A

18/51

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

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” :

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

“1000000” : 13.0 mA

“1000001” : 13.2 mA

“1000010” : 13.4 mA

“1000011” : 13.6 mA

“1000100” : 13.8 mA

“1000101” : 14.0 mA

“1000110” : 14.2 mA

“1000111” : 14.4 mA

“1001000” : 14.6 mA

“1001001” : 14.8 mA

“1001010” : 15.0 mA

“1001011” : 15.2 mA

“1001100” : 15.4 mA

“1001101” : 15.6 mA

“1001110” : 15.8 mA

“1001111” : 16.0 mA

“1010000” : 16.2 mA

“1010001” : 16.4 mA

“1010010” : 16.6 mA

“1010011” : 16.8 mA

“1010100” : 17.0 mA

“1010101” : 17.2 mA

“1010110” : 17.4 mA

“1010111” : 17.6 mA

“1011000” : 17.8 mA

“1011001” : 18.0 mA

“1011010” : 18.2 mA

“1011011” : 18.4 mA

“1011100” : 18.6 mA

“1011101” : 18.8 mA

“1011110” : 19.0 mA

“1011111” : 19.2 mA

“1100000” : 19.4 mA

“1100001” : 19.6 mA

“1100010” : 19.8 mA

“1100011” : 20.0 mA

“1100100” : 20.2 mA

“1100101” : 20.4 mA

“1100110” : 20.6 mA

“1100111” : 20.8 mA

“1101000” : 21.0 mA

“1101001” : 21.2 mA

“1101010” : 21.4 mA

“1101011” : 21.6 mA

“1101100” : 21.8 mA

“1101101” : 22.0 mA

“1101110” : 22.2 mA

“1101111” : 22.4 mA

“1110000” : 22.6 mA

“1110001” : 22.8 mA

“1110010” : 23.0 mA

“1110011” : 23.2 mA

“1110100” : 23.4 mA

“1110101” : 23.6 mA

“1110110” : 23.8 mA

“1110111” : 24.0 mA

“1111000” : 24.2 mA

“1111001” : 24.4 mA

“1111010” : 24.6 mA

“1111011” : 24.8 mA

“1111100” : 25.0 mA

“1111101” : 25.2 mA

“0110001” : 10.0 mA

“0110010” : 10.2 mA

“0110011” : 10.4 mA

“0110100” : 10.6 mA

“0110101” : 10.8 mA

“0110110” : 11.0 mA

“0110111” : 11.2 mA

“0111000” : 11.4 mA

“0111001” : 11.6 mA

“0111010” : 11.8 mA

“0111011” : 12.0 mA

“0111100” : 12.2 mA

“0111101” : 12.4 mA

“0111110” :

“0111111” :

12.6 mA

12.8 mA

“1111110” :

“1111111” :

25.4 mA

25.6 mA

www.rohm.com

2011.04 - Rev.A

19/51

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

0

1

Bit [7:4] : THL (3:0)

“0000” :

“0001” :

“0010” :

“0011” :

Main LED current Down transition per 0.2mA step

0.256 ms

0.512 ms

1.024 ms

2.048 ms

4.096 ms

8.192 ms

16.38 ms

32.77 ms

65.54 ms

131.1 ms

196.6 ms

262.1 ms

“0100” :

“0101” :

“0110” :

“0111” :

“1000” :

“1001” :

“1010” :

“1011” :

“1100” :

327.7 ms

393.2 ms

458.8 ms

524.3 ms

(Initial value)

“1101” :

“1110” :

“1111” :

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” :

“0001” :

“0010” :

“0011” :

“0100” :

“0101” :

“0110” :

“0111” :

“1000” :

“1001” :

“1010” :

“1011” :

“1100” :

“1101” :

“1110” :

“1111” :

0.256 ms

0.512 ms

1.024 ms

2.048 ms

4.096 ms

8.192 ms

16.38 ms

32.77 ms

65.54 ms

131.1 ms

196.6 ms

262.1 ms

327.7 ms

393.2 ms

458.8 ms

524.3 ms

(Initial value)

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.

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2011.04 - Rev.A

20/51

BD6088GUL

Technical Note

Address 07h < ALC mode setting >

Address

R/W

Bit7

Bit6

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

07h

W

ADCYC(1) ADCYC(0) GAIN(1)

GAIN(0)

STYPE

VSB

MDCIR

SBIASON

Initial

Value

81h

1

0

1

Bit [7:6] : ADCYC(1:0)

ADC Measurement Cycle

0.52 s

1.05 s

“00” :

“01” :

“10” :

“11” :

1.57 s (Initial value)

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” :

“01” :

“10” :

“11” :

Auto Change (Initial value)

High

Low

Fixed

Refer to “(3) Gain control” of “The explanation of ALC” for detail.

Bit3 :

Bit2 :

Bit1 :

Bit0 :

STYPE

“0” :

Ambient Light Sensor Type Select (Linear/Logarithm)

For Linear sensor (Initial value)

For Log sensor

“1” :

Refer to “(7) Ambient level detection” of “The explanation of ALC” for detail.

VSB

“0” :

“1” :

SBIAS Output Voltage Control

SBIAS output voltage 3.0V

SBIAS output voltage 2.6V

(Initial value)

Refer to “(2) I/V conversion” of “The explanation of ALC” for detail.

MDCIR

“0” :

LED Current Reset Select by Mode Change

LED current non-reset when mode change

LED current reset when mode change

(Initial value)

“1” :

Refer to “(10) LED current reset when mode change” of “The explanation of ALC” for detail.

SBIASON

“0” :

“1” :

Measurement cycle synchronous

Usually ON (at ALCEN=1) (Initial value)

Refer to “(4) A/D conversion” of “The explanation of ALC” for detail.

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2011.04 - Rev.A

21/51

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

Bit [7:4] : SOFS (3:0) ADC Data Offset adjustment

“1000” :

“1001” :

“1010” :

“1011” :

“1100” :

“1101” :

“1110” :

“1111” :

“0000” :

“0001” :

“0010” :

“0011” :

“0100” :

“0101” :

“0110” :

“0111” :

-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” :

“1001” :

“1010” :

“1011” :

“1100” :

“1101” :

“1110” :

“1111” :

“0000” :

“0001” :

“0010” :

“0011” :

“0100” :

“0101” :

“0110” :

“0111” :

reserved

-37.50%

-31.25%

-25.00%

-18.75%

-12.50%

-6.25%

no adjustment

+6.25%

+12.50%

+18.75%

+25.00%

+31.25%

+37.50%

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.

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2011.04 - Rev.A

22/51

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)

Bit [7:4] : (Not used)

Bit [3:0] : AMB (3:0) Ambient Level

“0000” :

“0001” :

“0010” :

“0011” :

“0100” :

“0101” :

“0110” :

“0111” :

“1000” :

“1001” :

“1010” :

“1011” :

“1100” :

“1101” :

“1110” :

“1111” :

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.

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2011.04 - Rev.A

23/51

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” :

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

“1000000” : 13.0 mA

“1000001” : 13.2 mA

“1000010” : 13.4 mA

“1000011” : 13.6 mA

“1000100” : 13.8 mA

“1000101” : 14.0 mA

“1000110” : 14.2 mA

“1000111” : 14.4 mA

“1001000” : 14.6 mA

“1001001” : 14.8 mA

“1001010” : 15.0 mA

“1001011” : 15.2 mA

“1001100” : 15.4 mA

“1001101” : 15.6 mA

“1001110” : 15.8 mA

“1001111” : 16.0 mA

“1010000” : 16.2 mA

“1010001” : 16.4 mA

“1010010” : 16.6 mA

“1010011” : 16.8 mA

“1010100” : 17.0 mA

“1010101” : 17.2 mA

“1010110” : 17.4 mA

“1010111” : 17.6 mA

“1011000” : 17.8 mA

“1011001” : 18.0 mA

“1011010” : 18.2 mA

“1011011” : 18.4 mA

“1011100” : 18.6 mA

“1011101” : 18.8 mA

“1011110” : 19.0 mA

“1011111” : 19.2 mA

“1100000” : 19.4 mA

“1100001” : 19.6 mA

“1100010” : 19.8 mA

“1100011” : 20.0 mA

“1100100” : 20.2 mA

“1100101” : 20.4 mA

“1100110” : 20.6 mA

“1100111” : 20.8 mA

“1101000” : 21.0 mA

“1101001” : 21.2 mA

“1101010” : 21.4 mA

“1101011” : 21.6 mA

“1101100” : 21.8 mA

“1101101” : 22.0 mA

“1101110” : 22.2 mA

“1101111” : 22.4 mA

“1110000” : 22.6 mA

“1110001” : 22.8 mA

“1110010” : 23.0 mA

“1110011” : 23.2 mA

“1110100” : 23.4 mA

“1110101” : 23.6 mA

“1110110” : 23.8 mA

“1110111” : 24.0 mA

“1111000” : 24.2 mA

“1111001” : 24.4 mA

“1111010” : 24.6 mA

“1111011” : 24.8 mA

“1111100” : 25.0 mA

“1111101” : 25.2 mA

“0110001” : 10.0 mA

“0110010” : 10.2 mA

“0110011” : 10.4 mA

“0110100” : 10.6 mA

“0110101” : 10.8 mA

“0110110” : 11.0 mA

“0110111” : 11.2 mA

“0111000” : 11.4 mA

“0111001” : 11.6 mA

“0111010” : 11.8 mA

“0111011” : 12.0 mA

“0111100” : 12.2 mA

“0111101” : 12.4 mA

“0111110” :

“0111111” :

12.6 mA

12.8 mA

“1111110” :

“1111111” :

25.4 mA

25.6 mA

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2011.04 - Rev.A

24/51

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” :

“01” :

“10” :

“11” :

Ambient 1h Width

Ambient 2h Width

Ambient 3h Width (initial)

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” :

“0001” :

“0010” :

“0011” :

“0100” :

“0101” :

“0110” :

“0111” :

“1000” :

“1001” :

“1010” :

“1011” :

“1100” :

“1101” :

“1110” :

“1111” :

Ambient level 0h OFF

Ambient level 1h OFF

Ambient level 2h OFF

Ambient level 3h OFF

Ambient level 4h OFF

Ambient level 5h OFF

Ambient level 6h OFF

Ambient level 7h OFF

Ambient level 8h OFF

Ambient level 9h OFF

Ambient level Ah OFF (initial)

Ambient level Bh OFF

Ambient level Ch OFF

Ambient level Dh OFF

Ambient level Eh OFF

Ambient level Fh OFF

Refer to “(12) Key back light value decision” of “The explanation of ALC” for detail.

www.rohm.com

2011.04 - Rev.A

25/51

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

Bit [7:5] : (Not used)

Bit4 :

Bit3 :

KBMD Key back light mode choice (ALC/ Individual)

“0” :

“1” :

KBLT ALC Control

KBLT Individual Control

Refer to “(13) Key back light PWM control” of “The explanation of “ ALC” for detail.

OUT4MD OUTCNT External Control setting

“0” :

“1” :

OUTCNT invalid, OUT4 output depends on output control by OUT4EN.

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 :

Bit1 :

Bit0 :

OUT3MD OUTCNT External Control setting

“0” :

“1” :

OUTCNT invalid, OUT3 output depends on output control by OUT3EN.

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.

OUT2MD OUTCNT External Control setting

“0” :

“1” :

OUTCNT invalid, OUT2 output depends on output control by OUT2EN.

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.

OUT1MD OUTCNT External Control setting

“0” :

“1” :

OUTCNT invalid, OUT1 output depends on output control by OUT1EN.

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.

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2011.04 - Rev.A

26/51

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

Bit [7:5] : (Not used)

KBEN KBLT output level setting (non-ALC mode)

Bit4 :

Bit3 :

Bit2 :

Bit1 :

Bit0 :

“0” :

“1” :

KBLT L 出力

KBLT H 出力

Refer to “(13) Key back light PWM control” of “The explanation of ALC” for detail.

OUT4EN OUT4 Output level setting

“0” :

“1” :

OUT4 Hi-Z Output

OUT4 L Output

Refer to “The explanation of OUTPWM control” for detail.

OUT3EN OUT3 Output level setting

“0” :

“1” :

OUT3 Hi-Z Output

OUT3 L Output

Refer to “The explanation of OUTPWM control” for detail.

OUT2EN OUT2 Output level setting

“0” :

“1” :

OUT2 Hi-Z Output

OUT2 L Output

Refer to “The explanation of OUTPWM control” for detail..

OUT1EN OUT1Output level setting

“0” :

“1” :

OUT1 Hi-Z Output

OUT1 L Output

Refer to “The explanation of OUTPWM control” for detail.

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2011.04 - Rev.A

27/51

BD6088GUL

Technical Note

Address 1Dh < OUT KEY Output Mode setting >

Address

R/W

Bit7

Bit6

Bit5

Bit4

-

Bit3

Bit2

Bit1

Bit0

1Dh

W

FPWM

-

KBSLP (1) KBSLP (0) OUTSLP(1) OUTSLP(0)

Initial

Value

00h

0

-

0

Bit7 :

FPWM Key Driver, OUT1～4 PWM cycle setting

“0” :

“1” :

2.048 ms

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

0.00 ms

FPWM=1

0.00 ms

“00” :

“01” :

“10” :

“11” :

16.38 ms

32.77 ms

65.54 ms

32.77 ms

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

0.00 ms

FPWM=1

0.00 ms

“00” :

“01” :

“10” :

“11” :

16.38 ms

32.77 ms

65.54 ms

32.77 ms

65.54 ms

131.08 ms

Refer to “The explanation of OUTPWM control” for detail.

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2011.04 - Rev.A

28/51

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

2.6V

DEToutput

Inside reset

Reset by

VIODET

VBAT

(typ)1.0V

VIO

VIODET

RESETB

R

LEVEL

Digital

I/O

DET output

Inside reset

SHIFT

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℃.

Detection temperature has a hysteresis, and detection release temperature is about 175 ^oC.

(Design reference value)

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2011.04 - Rev.A

29/51

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_SOFT

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 > T_TSD(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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2011.04 - Rev.A

30/51

BD6088GUL

Technical Note

Mode transition

The transition of boosts multiple transits automatically by VBAT Voltage and the VOUT Pin Voltage.

STANDBY

ALL off

1

condition○

MLEDEN=”1” or W*EN=”1”

and

1

○

Ta<T_TSD

SOFT

CP x1.0 mode

After detecting VOUT>1.5V(typ), 128us(typ) wait

CP x1.0 mode

mode up=”H”

X1.0

mode down=”H”

CP x1.5 mode

mode up=”H”

X1.5

X2.0

mode down=”H”

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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2011.04 - Rev.A

31/51

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

LED5

IW5[6:0]

W5EN

0

W5MD

1

0

LED6

IW6[6:0]

W6EN

W6MD

●General-purpose Output Ports

General-purpose Output Ports 4ch is constructed as the ground plan.

VGPO

VLED

GPO

Slope

GPO

Slope

Vf

Control

OUT*

When OUT* is used with Pull Up.

When OUT* is used with LED.

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2011.04 - Rev.A

32/51

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

Usually ON / intermittent

PWM enabling

WPWMIN

Offset Correction

Gain Correction

Sensor

SBIAS

ADC

SBIAS

Slope Timer

Mode Select

Sensor

LIN/LOG

Average

Conversion

LED*

LCD

Backlight

Sensor

Current

Slope

Data

Correction

SSENS

Logarithmic Conv.

Ambient Level

Conversion

process

VBAT

DC current setup

Main Group

setup

・・

GC1

GC2

2 value

decision

PWM

Gain

Control

process

KBLT

Key

Backlight

Threshold

Hysteresis

Mode Select

Slope Timer

PWM Cycle

Ambient Level

Gain Control ON/OFF

: 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.

Main LED

current

ALCEN MLEDEN MLEDMD

Sensor I/F

LED control

Mode

OFF

0

1

0

1

0

1

x

0

1

x

0

1

OFF

-

OFF

( AMB(3:0)=0h )

IMLED(6:0)

IU0(6:0) (*1)

-

IMLED(6:0)

ALC mode (*2)

Non ALC

mode

ON

OFF

ON

ALC mode

(*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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BD6088GUL

Technical Note

(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

Ambient

SBIAS

SSENS voltage

VCC

VSSENS

Rs is large

Iout

Sensor IC

A/D

IOUT

SSENS

SGND

GND

Rs

BD6088GUL

Rs is small

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

Ambient

SSENS Voltage = Iout x Rs

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BD6088GUL

Technical Note

(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.

High Gain mode

Low Gain mode

Ambient

Auto Gain mode

Ambient

Example 1 (Use BH1600FVC)

Example 2

Example 3

SBIAS

SSENS

VCC

SSENS

IOUT

SSENS

BH1600

Applicationexample

GC1

GC2

GND

SGND

Resister values are relative

Manual

Operating mode

Auto

00

Auto

Fixed

High

01

Low

10

High

01

Low

10

GAIN(1:0) setting

Gain status

00

11

-

High Low High

L

Low High Low High

Low

L

GC1 output

L

GC2 output

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.

(*1)

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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

T^{wait= 64ms(typ)}(Wait time)

When SBIASON=1

ADC Movement

T^{AD= 16.4ms(typ)}

AD start signal

(A/D conversion time)

GC1, GC2

GC1, GC2=00

TADone= 1.024ms(typ)

16 times measurement

AMB(3:0)

T^{oprt= 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)

< Gain Adjustment >

Gain adjustment

SGAIN(3:0)

Ambient

< Offset Adjustment >

Offset adjustment

SOFS(3:0)

Ambient

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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

GAIN(1:0)

GAIN

0

1

xx

-

00

10

01

11

-

Low

High

Low

High

Ambient

Level

SSENS Voltage

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

0h

1h

2h

3h

4h

5h

6h

7h

8h

9h

Ah

Bh

Ch

Dh

Eh

Fh

VoS×0/256

VoS×1/256

VoS×2/256

VoS×0/256

VoS×1/256

VoS×2/256

VoS×0/256

VoS×1/256

VoS×2/256

VoS×3/256

VoS×4/256

VoS×5/256

VoS×7/256

VoS×8/256

VoS×3/256

VoS×4/256

VoS×5/256

VoS×7/256

VoS×8/256

VoS×3/256

VoS×4/256

VoS×5/256

VoS×6/256

VoS×7/256

VoS×9/256

VoS×0/256

VoS×1/256

VoS×0/256

VoS×1/256

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×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×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

VoS×2/256

VoS×3/256

VoS×4/256

VoS×6/256

VoS×7/256

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×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

・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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BD6088GUL

Technical Note

(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

11h

Current value

3.6mA

Ambient Level

Setting data

48h

Current value

14.6mA

17.4mA

19.2mA

20.0mA

0h

1h

2h

3h

4h

5h

6h

7h

8h

9h

Ah

Bh

Ch

Dh

Eh

Fh

13h

4.0mA

56h

15h

4.4mA

5Fh

18h

5.0mA

63h

1Eh

6.2mA

63h

25h

7.6mA

63h

2Fh

9.6mA

63h

3Bh

12.0mA

63h

(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.

Current Data which is set

LED Current

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.

THL

(3:0)

TLH(3:0)

Up/Down transition Speed

is set individually

TLH

time

Zoom

25.6mA

256

THL

=0.1mA

TLH(3:0)

time

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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

NonALC

mode

ALC

mode

NonALC

mode

NonALC

mode

ALC

mode

NonALC

mode

IMLED(6:0)

IU*(6:0)

MDCIR= “0”

MDCIR= “1”

0mA

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.

WPWMIN(External Pin)

WPWMEN

(Register)

Main group

LED current

WPWMPOL=H

WPWMPOL=L

(Register)

H

(Register)

L

Normal operation

Forced OFF

0

1

H

L

H

L

H

Normal operation

" Normal operation " depends on the setup of each register.

E N (*)

Inte rna l S o ft-Sta rt T im e

D C /D C

O utp ut

inp ut

W P W M IN

W P W M E N

L E D C urrent

E N (*) : it m e a ns “M L E D E N ” or “W *E N ”.

It is poss ib le to m ak e it a W P W M IN inp ut a nd W P W M E N = 1 in fro nt of E N (*).

A P W M driv e b e c om e s e ffec tiv e afte r the tim e o f a n L E D c urre nt s tand up .

W he n ris ing during P W M o p e ratio n, a s for the s ta nd up tim e o f

a D C /D C o utp ut, o nly the ra te o f

P W M D uty b e c o m es la te. A p p e ara nc e m a y b e influ e nce d w he n e xtrem ely la te freq ue nc y a nd

e xtrem e ly lo w D uty a re inp utte d .

P le a s e s e c ure 80 μ s or m o re o f H s ectio ns a t the tim e of P W M p uls e F o rc e.

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BD6088GUL

Technical Note

(12) Key back light 2-value decision

ON

・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)

Detect threshold level,

Hysteresis

setup is possible

The threshold value and hystresis must meet the following condition:

CTH setting  CHYS setting

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.

KBMD

0

KBEN

KBLT output

-

Depend on ALC setting

0

1

0

1

・32 levels Duty ratio (H level section) becomes the following set point.

Step

0

Duty(%)

0.00

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

1

1.56

2

3.13

100

90

80

70

60

50

40

30

20

10

0

3

4.69

4

6.25

5

7.81

6

9.38

7

10.94

12.50

14.06

15.63

17.19

18.75

20.31

21.88

23.44

8

9

10

11

12

13

14

15

0

5

10

15

20

25

30

The number of st ep' s

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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)

1

OFF

0

･･････ 301

31

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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

OUTCNT

OUT*出力

0

1

-

After the PWM slope, Hi-z (Duty 0%)

After the PWM slope, L (Duty 100%)

Hi-z (LED is compulsory lights off)

0

1

0

1

Hi-z(Duty0%) *1

Hi-z (LED is compulsory lights off

L (Duty100%) *

1

*1 But, Duty in the middle of the PWM slope is output at the time as the PWM slope by OUT*EN.

OUT*

0

PWM

OUT*EN

1

Slope circuit

OUTCNT

OUT*MD

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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

OUT*DUTY show the H section of the output step NMOS gate. (Duty 0%~100 %)

②Slope setup nothing (OUTSLP[1:0]=00h)

Slope by OUTCNT is nothing.

(It is done ON/OFF promptly.)

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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BD6088GUL

Technical Note

・32 levels Duty ratio (H level section) becomes the following set point.

Step

0

Duty(%)

0.00

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

1

1.56

100

90

80

70

60

50

40

30

20

10

0

2

3.13

3

4.69

4

6.25

5

7.81

6

9.38

7

10.94

12.50

14.06

15.63

17.19

18.75

20.31

21.88

23.44

8

9

10

11

12

13

14

15

0

5

10

15

20

25

30

The number of st ep' s

OUT*EN

OUT*DUTY

Expansion

ｔ

t= time per 1step×32

OUT*EN

Duty=1.56%(At the time of step 1)

Duty=93.75%(At the time of step 32)

Expansion

FPWM

OUT*

OUTSLP(1:0)

1

Step

OFF

0

30

31

･･････

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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.”

Level shifter

EN

SCL

(SDA)

Logic

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

Short to GND because pin for test input

OPEN because pin for test output

T2, T4

T3

Short to GND (Must)

But, the setup of a register concerned with LED that isn’t used is prohibited.

Short to ground

Non-used LED Pin

WPWMIN, OUTCNT

(A Pull-Down resistance built-in terminal is contained, too.)

OUT1～4

It opens for an output

KBLT

Although Pull-Down is built in, it opens for an output.

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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.

The backlight turns on.

MLEDEN=0 must be set first when the backlight is off.

MLEDEN=1

ALCEN

ADCYC(1:0)

ADC Cycle

SBIAS Output

T^{wait= 64ms(typ)}

W hen SBIASON=1

ADC Movement

GC1, GC2

TAD= 16.4ms(typ)

GC1, GC2=00

AMB(3:0)

T^{AMB= 80.4ms(typ)}

VOUT

LED current

①

T^SOFT

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 setting.

Backlight: Various settings

Slow time setting.

The backlight turns on.

MLEDEN=1

(Rise at designated slope time)

Set the minimum current.

MLEDEN=0

(Rise at designated slope time)

The backlight turns off.

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BD6088GUL

Technical Note

3. Backlight: Un-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=0 is mandatory.

Backlight: Various settings

The backlight turns on.

MLEDEN=1

MLEDEN=0 must be set first when the backlight is off.

MLEDEN

VOUT

LED current

The rise time depends on TLH(3:0) setting

TSOFT

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BD6088GUL

Technical Note

●PCB pattern of the Power dissipation measuring board

1^stlayer(component)

2^ndlayer

3^rdlayer

4^thlayer

5^thlayer

6^thlayer

7^thlayer

8^thlayer(solder)

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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.

www.rohm.com

2011.04 - Rev.A

49/51

BD6088GUL

Technical Note

●Power dissipation (On the ROHM’s standard board)

1.6

1380mW

1.4

Information of the ROHM’s standard board

Material : glass-epoxy

1.2

1.0

0.8

0.6

0.4

0.2

0.0

Size : 50mm×58mm×1.75mm(8^thlayer)

Wiring pattern figure Refer to after page.

0

25

50

75

100 125 150

Ta（℃）

www.rohm.com

2011.04 - Rev.A

50/51

BD6088GUL

Technical Note

●Ordering part number

-

B D

6

0

8

G U

L

E

2

Part No.

6088

Package

Packaging and forming specification

E2: Embossed tape and reel

GUL : VCSP50L3

VCSP50L3(BD6088GUL)

Tape

Embossed carrier tape

2500pcs

1PIN MARK

Quantity

E2

Direction

of feed

3.50 0.05

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

S

(

)

0.06

S

φ

36- 0.25 0.05

A

0.05

A B

F

E

D

C

B

A

B

φ

(

0.15)INDEX POST

1

2 3 4 5 6

Direction of feed

1pin

0.50 0.05

P=0.50×5

Reel

Order quantity needs to be multiple of the minimum quantity.

(Unit : mm)

∗

www.rohm.com

2011.04 - Rev.A

51/51

Notice

N o t e s

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, commu-

nication 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, fuel-

controller 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/

www.rohm.com

R1120

A


型号：	BD6088GUL_11
厂家：	ROHM
描述：	Mulitifunction Backlight LED Driver for Small LCD Panels (Charge Pump Type) Mulitifunction背光LED驱动器，用于小型液晶面板（电荷泵型）驱动器泵 CD
文件：	总52页 (文件大小：802K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

BD6088GUL_11 [ROHM]

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