ROHM Presentation - LED_Drivers-html.html

Confidential

1970

～

Level meter

RGB illumination

LED lighting

LCD-TV

･

Digital technology

Colour control

･

Brightness control

Clusters

･

Technology for energy saving

Combination with sensors

･

Reduction of ext. components

High-efficiency

･

Dynamic flashing

constant-current
driver

Standard Type

High reliability

Type

Mobile phone

Head lamps

･

Power-supply

technology

･

DC/DC converter

LCD backlight

･

Communication

technology

･

Modularization

High-power
High-durability

1990

2000

2010

2020

Organic EL

lighting

Warning lamps

Audio

Mobile phone

LCD backlight

DRL

Rear lamps

Interior light

Medical

equipment

Dot matrix

Navigation

LED display

Wide application range from consumers to automotive

Laser Di driver

White goods

Navigation

ROHM LED Driver: History

Confidential

Simple Constant Current Driver without step-up converter

・

Low Dropout Constant

current driver

・

Current DAC integrated

・

Small package

・

Li-ion battery corresponded

Part No.

LED number

Current

DAC

I/F

Size [mm]

BD1754HFN

Max 4

64steps

UPIC *3

2.9 x 2.8 HSON8

BDxxx2

32steps(Log)

UPIC+

2.9 x 2.8 SSOP5 (TBD)

BDxxx3

32steps(Log)

UPIC+

2.9 x 2.8 SSOP6 (TBD)

BDxxx4

32steps(Log)

UPIC+

VSON008X2020 (TBD)

BDxxx5

32steps(Log)

UPIC+

VSON008X2020 (TBD)

BDxxx6

32steps(Log)

UPIC+

VSON010X3020 (TBD)

*3 : UPIC+ is Uni-Port Interface Control + like as 1-wire interface

Features

Line-up

OSC

Constant

Current

Driver

Over current Limiter

Over voltage Limiter

Under Voltage

Lock Out circuit

Output Short Protect

Thermal Shut Down

Protection Circuits

BATTERY

Block Diagram

Mass production
New product
Under development

Confidential

Parallel connection type with charge pump

・

High Efficiency Charge pump

(x1/x1.5/x2)

・

Current DAC integrated

・

Small package

・

Li-ion battery corresponded

・

External PWM brightness

control

OSC

1.5,

Charge Pump

Controller

Constant

Current

Driver

Over current

Protection circuit

Over voltage

Protection circuit

Under Voltage

Lock Out circuit

Output Short

Protection circuit

Thermal Shut

Down circuit

Protection Circuits

Li-ion

BATTERY

Part No.

LED
number

Current

DAC

PWM

Control

I/F

Size [mm]

BD1604MUV

Max 4

○

3.0 x 3.0 QFN

BD1604MVV

Max 4

○

4.0 x 4.0 QFN

BD1601MUV

Max 4

64steps

UPIC *2

3.0 x 3.0 QFN

BD1606MVV

Max 6

64steps

I2C

4.0 x 4.0 QFN

BD1603NUV

Vo fixed

○

3.0 x 3.0 SON

BD82103GWL

Max 3

16steps(Log)

UPIC+ *2

1.8 x 1.5 CSP

BD1204GWL

Max 4

16steps(Log)

CPWM *1

UPIC+ *2

1.85 x 1.85 CSP

BD1206GUL

Max 6

16steps(Log)

CPWM *1

UPIC+ *2

2.0 x 2.0 CSP

BU90030G

Vo fixed

○

SSOP6

*1 : CPWM is Current PWM solution that brings low noise in PWM brightness control

*3 : UPIC, UPIC+ are Uni-Port Interface Control like as 1-wire interface

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

Serial connection type

・

High Efficiency synchronous

DC/DC

・

Load disconnect switch

integrated [BD6xxxGUT]

・

Auto Luminous Control

integrated [BD60910GU]

・

Small package

・

Li-ion battery corresponded

Chopper

Controller

Thermal Shut

Down circuit

Over current

Protection circuit

Over voltage

Protection circuit

SBD Open

Protection circuit

OSC

Step-up voltage detection

Error amp

SBD

8 lamps in series

lamps in series

DAC

Current mode current

detection

Li-ion

BATTERY

Protection Circuits

ALC : Auto Luminous Control. It realize low power system.

Features

Line-up

Block Diagram

Part No.

LED

number

Synch.

Brightness

Control

Other

Function

Size [mm]

BD6067GU

Max 8

PWM or DC

1.68 x 1.68 CSP

BD6071HFN

Max 3

○

PWM or DC

3.0 x 2.9 HSON8

BD6072HFN

Max 4

○

PWM or DC

3.0 x 2.9 HSON8

BD6069GUT

Max 4

○

PWM or DC

1.68 x 1.68 CSP

BD6077GUT

Max 4

○

PWM or DC

1.68 x 1.68 CSP

BD6074GUT

Max 3

○

PWM or DC

1.68 x 1.68 CSP

BD6076GUT

Max 4

○

PWM or DC

Load
Disconnect

1.68 x 1.68 CSP

BD6091GU

Max 8

DAC + PWM

ALC

3.0 x 3.0 CSP

BD60910GU

Max 8

DAC + PWM

ALC
(Log sensor)

3.0 x 3.0 CSP

BD60A00NUX

Max 10

PWM over 20kHz

VSON008X2030

BD60A60NUX

Max 6

PWM over 20kHz

VSON008X2030

BD60H60MWX

Max 6

PWM to DC

GPO 5Ch

VSON016V3315

BDxxxxMUX

Max 4

(

○

)

PWM

VSON008X2020 (TBD)

BDxxxxMUX

Max 6

(

○

)

PWM

VSON008X2020 (TBD)

Mass production
New product
Under development

Confidential

Multi-function parallel type

・

High Efficiency Charge pump

・

High Efficiency Serial DC/DC

・

RGB illumination Driver

・

LDO integrated

・

Low power ALC function

・

Low noise PWM control

・

Flash LED driver

・

GPIO

・

Small CSP package

・

Li-ion battery corresponded

Part No.

Back
Lighting

DC/DC

RGB

LDO

ALC

PWM

Other

Package

BD6081GU

Max 6

Charge Pump

6LED

2Ch

3.9 x 3.9 CSP

BD6085GUL

Max 7

Charge Pump

4Ch

Flash

3.3 x 3.3 CSP

BD6086GU

Max 7

Charge Pump

6LED

2Ch

○

GPIO 4Ch

4.5 x 4.5 CSP

BD60xxGU

Max 7

Charge Pump

3LED

2Ch

○

GPIO 4Ch

4.5 x 4.5 CSP

BD6095GUL

Max 5

Charge Pump

4Ch

○

Flash

3.75 x 3.75 CSP

BD6088GUL

Max 6

Charge Pump

4LED

○

(GPO)

3.5 x 3.5 CSP

BD6098GUL

Max 6

Charge Pump

4LED

○

(GPO)

3.5 x 3.5 CSP

BD6091GU

Max 8

DC/DC

○

3.0 x 3.0 CSP

BD6092GU

○

PWM Out

2.8 x 2.8 CSP

BD6107GU

Max 12
(3 x 4)

DC/DC

6LED

3Ch

○

GPIO 4Ch
GPO 8Ch

4.3 x 4.3 CSP

BD60910GU

Max 8

DC/DC

○

(Log)

○

3.0 x 3.0 CSP

BD6083GUL

Max 6

Charge Pump

4Ch

○

3.15 x 3.15 CSP

BD6084GUL

Max 8

Charge Pump

4Ch

○

3.15 x 3.45 CSP

BD6183GUL

Max 6

Charge Pump

4Ch

○

3.15 x 2.65 CSP

BD6184GUL

Max 8

Charge Pump

4Ch

○

3.15 x 3.10 CSP

BD6082GUL

Max 7

Charge Pump

3LED

○

AUX 6Ch

3.60 x 3.60 CSP

BU61800GWL

Max 8

Charge Pump

4Ch

○

2.2 x 2.2 (TBD)

・・

Charge Pump

VBATCP

C interface

IREF

TSD

LED1

Back Light

LEDGND

x1 / x1.5 / x2

Charge Pump
Mode Control

VOUT

OVP

LED terminal voltage feedback

Digital Control

10µF

Level

Shift

VIO

RESETB

SCL

SDA

VBAT

SBIAS

SSENS

BH1600FVC

SGND

GC1

GC2

WPWMIN

LED2

LED3

LED4

LED5

VBAT1

LED6

OUT3

OUT1

OUT2

GPO

VREF

I/O

KBLT

Key

Control

VBAT

Key Pad
LED

OUT4

OUTCNT

)

Sensor

I/F

LED

control

ALC

Slope

Control

Slope

Control

Slope

Control

Slope

Control

ALC : Auto Luminous Control function (Ambient Light sensor I/F)

CPWM : CPWM is Current PWM solution that brings low noise in PWM brightness control

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

Multi-function parallel & seriell type for LCD back lighting

・

High Efficiency Serial DC/DC

・

Switching FET integrated

・

LED current accuracy +/- 1.5%

[BD6149/BD6150/BD6142A]

・

Wide range input voltage

・

Rich safety function integrated

・

No sounding Capacitor by high

speed response

・

Low EMI by smoothing PWM

switching

Part No.

Back Lighting LED (Max.)

Switching

FET

LED

Current

Input
Voltage[V]

Size [mm]

Serial

Parallel

Max

BD6066GU

External

30mA/Ch

2.7 – 22

2.6 x 2.6 CSP

BD6066EKN

External

30mA/Ch

2.7 – 22

5.1 x 5.1 QFN

BD6583MUV-A

External

25mA/Ch

2.7 – 22

4.0 x 4.0 QFN

BD6581GU

External

25mA/Ch

2.7 – 22

2.6 x 2.6 CSP

BD6592MUV

External

40mA/Ch

2.7 – 22

4.0 x 4.0 QFN

BD6586MUV

Internal

25mA/Ch

2.7 – 5.5

4.0 x 4.0 QFN

BD6150MUV

Internal

30mA/Ch

4.2 – 26

4.0 x 4.0 QFN

BD6590MUV

Internal

30mA/Ch

4.5 – 5.5

4.0 x 4.0 QFN

BD6142AMUV

Internal

30mA/Ch

4.2 – 27

4.0 x 4.0 QFN

BD65D00MUV

Internal

90mA/Ch

4.2 – 27

5.0 x 5.0 QFN

PWMPOW

PWMDRV

PWM

N.C.

PWM

=100Hz~1kHz

TEST

FSEL

OCPSET

68k

Ω

22k

Ω

BD6150MUV

1µF

2.2µF

/ 50V

4.7µH

10µF

7V to 19V

1µF

Battery or adapter

10LED × 6parallel

VDET

N.C.

LED1

LED2

LED3

LED4

LED5

LED6

N.C.

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

LED Driver for Illumination & Decoration & Matrix Displays

・

Using the constant current driver

(less scratchy)

・

Integrated Illumination pattern

・

7bit (128step) current DAC

・

Device Address select function

・

High Efficiency Charge Pump

(x1/x1.5/x2 mode)

・

Sleep mode sequence

・

Low Saturation Current Driver

・

Small package

・

Li-ion battery corresponded

VBAT2

C interface

IREF

TSD

R1LED

RGB1

RGBGND

Digital Control

4.7µF

Level

Shift

VIO

RESETB

SCL

SDA

VBAT

RGB1CNT

G1LED

B1LED

R2LED

G2LED

VBAT1

B2LED

VREF

I/O

RGB2

RGB2CNT

ADDSEL

Slope

Control

(RGB1)

VBAT

Slope

Control

(RGB2)

RGBISET

CLKIO

Part No.

RGB Driver

Charge
Pump

Wave

Pattern

LED max

Current

Other

Size [mm]

BD2606MUV

2Ch (6LEDs)

○

30mA/Ch

4.0 x 4.0 QFN

BD2802GU

2Ch (6LEDs)

Yes

30mA/Ch

2.8 x 2.8 CSP

BD2812GU

2Ch (6LEDs)

○

Yes

30mA/Ch

Sleep Mode

3.1 x 3.1 CSP

BD2804GUL

4Ch (12LEDs)

Yes

30mA/Ch

Sleep Mode

(TBD)

BD2801GUL

1Ch (3LEDs)

60mA/Ch

(TBD)

BH6948GU

7 x 7 Matrix

○

Slope

31mA/Line

4.1mm

□

CSP

BD26502GUL

7 x 17 Matrix

Scroll,
Slope

20mA/Line

(RAM x2)

4.1mm

□

CSP

BD26503GUL

7 x 17 Matrix

Scroll,
Slope

30mA/Line

(RAM x2)

3.6mm

□

CSP

BD26503KS2

SQFP-T52

BDU6507GUL

5 x 6 Matrix

Slope

42.5mA/Line

(RAM x2)

2.5mm

□

CSP(TBD)

BU16501KS2

8x 16 Matrix

42.5mA/Line

(RAM x1)

SQFP-T52

BU16501GWL

CSP (TBD)

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

Part No.

Channel

Maximum

Output

Current

Solution

Brightness

Control

Max

Voltage

I/F

Package

BD7851FP

80mA/Ch

Constant
current driver

ON/OFF

10V

4-wire

HSOP-25

BD7844AEFV

80mA/Ch

Open drain

PWM 8bit

20V

I2C

HTSSOP-B28

BD7853EFV

50mA/Ch

Constant
Current driver

ON/OFF

20V

3-wire

HTSSOP-B24

BD78H24EUV

50mA/Ch

Constant
Current driver

DAC 6bit
PWM 8bit

20V

2-wire

HTSSOP-B48

・

High voltage on LED pin

・

80mA/Ch open drain driver

・

6bit PWM brightness control

・

4bit Device address selectable

・

I2C 1MHz or 2-wire 2MHz I/F

・

High power package

LED Driver for Indicators

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

Flash LED Driver for Flash/Torch Lighting

・

High Efficiency Charge pump

・

High Efficiency Charge pump

・

Flash Timer integrated

[BD7700/BD6062]

・

4Ch LDO for Camera integrated

[BD6085]

・

Small package

・

Li-ion battery corresponded

Part No.

Maximum

Output Current

Solution

Other

I/F

Size [mm]

BD1603NUV

190mA(Vo=4.5V)

Charge Pump

I2C

3.0 x 3.0 QFN

BD7700GU

300mA
(Source type)

Charge Pump

Flash Timer

2.24 x 2.24 CSP

BD6085GUL

480mA

Charge Pump
(x1.33 mode)

LDO 4Ch

I2C

3.3 x 3.3 CSP

BD6062GU

DC/DC

Flash Timer

SCI

2.86 x 2.86 CSP

BD7704MUX

1.5A (750mA x 2)
(Source type)

DC/DC

Flash Timer

UPIC+

3.0 x 3.0 QFN

BD7705GUL

1.5A (750mA x 2)
(Source type)

DC/DC

Flash timer

I2C

1.7 x 1.7 (TBD)

BD7274FUJ

2.4A (600mA x 4ch)
(Source type)

TSSOP-C10J

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

General Lighting LED Driver

・

Vin(AC) : 80Vac – 270Vac

・

2W – 30W output power

・

High efficiency Step Down AC/DC

・

Bleeder function

・

3-way dimming (Triac/Linear/PWM)

・

Small package

Part No.

Vin(AC)

Output

Power

Dimming control

Package

Triac

Linear

PWM

BD555AKFV

80V – 270V

2W – 30W

○

SSOP-B14

BD555BKFV

○

SSOP-B14

BD555A1KFV

80V – 270V

2W – 30W

○

SSOP-B14

BD555AAKFV

80V – 270V

2W – 30W

SSOP-B14

Features

Line-up

Block Diagram

Mass production
New product
Under development

Confidential

Multichannel step-up, step-down LED driver

～

2010

2012

2013

2011

BD8105FV

12ch Open Drain

Output voltage 35Vmax

SSOPB20W

BD8115F

8ch Open Drain

Output voltage 35Vmax

SOP16

BD8376FV-M

8ch Open Drain

Output voltage 35Vmax

SSOPB16

0.6um Bi-CDMOS

0.35um Bi-CDMOS

BD8377FV-M

12ch Open Drain

Output voltage 35Vmax

Low EMC Noise

SSOPB20

BD18377FV-M

12ch Constant current

50mA/ch

Diagnostic function

PWM dimming

Individual current setting

In Development

Future Developments

In Production

Rohm

Part Number

Channel

Number

Maximum

Input Voltage

Maximum

Output Voltage

ON Resistor

Serial Clock

Frequency

Drive

Current

Package

Status

BD8105FV

12ch

35V

Ω

1MHz

50mA

SSOP-B20W

BD8115F

8ch

35V

Ω

1.25MHz

50mA

SOP-16

BD8376FV

8ch

35V

Ω

1.25MHz

50mA

SSOP-B16

BD8377FV

12ch

35V

Ω

1.25MHz

50mA

SSOPB20

BD18377EFV

12ch

20V

Ω

1.25MHz

50mA

HTSSOP-B20

DS available

Rohm

Confidential

VCC

SERIN

CLK

LATCH

SDWN

GND

SEROUT

VCC

ift

l L

RST_B

D11

D10

・

・・・

・

12bit Serial-in / Parallel-out I/F

・

35V DMOS Open Drain Output

・

Max. Current 50mA/ch (DC)

・

Max. Current 150mA/ch (Pulse)

・

Ron of Power MOSFET 6

Ω

(typ)

・

Cascade connection possible

・

Output slew rate 20V/usec

(For low EMC noise)

・

SSOP-B20 small package

・

8bit Serial-in / Parallel-out I/F

・

Small SSOP-B16 package

BD8377FV Features

BD8377 (12ch); BD8376 (8ch)

BD8376FV Features

Confidential

Step-up, step-down LED Driver for Display Backlighting

～

2010

2012

2013

2011

BD8119FM

Buck-Boost 4ch for B/L

LED Current Max.150mA/ch

HSOPM28

BD8112/13EFV

Buck-Boost 2ch for B/L

LED Current Max.150mA/ch

HTSSOPB24

0.6um Bi-CDMOS

0.35um Bi-CDMOS

BD81AXXEFV/MUV

Back-Boost 2/3ch for B/L

120mA/ch

2.2MHz Frequency

In Development

Future Developments

In Production

Rohm

Part Number

DC/DC

Channel

Number

Maximum

Input Voltage

DC/DC

Frequency

Minimum PWM

Dimmer Duty

Drive

Current

Package

Status

BD8112/13EFV

Buck-Boost

2ch

36V

250-600kHz

0.38%

150mA

HTSSOP-B24

BD8119FM

Buck-Boost

4ch

36V

250-600kHz

0.38%

150mA

HSOP-M28

BD81A14EFV

Buck-Boost

4ch

40V

0.2-2.2MHz

0.02%

external

HTSSOP/VQFN

DS available

BD81A04EFV

Buck-Boost

4ch

40V

0.2-2.2MHz

0.02%

120mA

HTSSOP/VQFN

DS available

Rohm

BD81A04EFV/MUV

Buck-Boost 4ch for B/L

120mA/ch

2.2MHz Frequency

HTSSOPB28

VQFN028V5050

Rohm

BD81A14EFV/MUV

Buck-Boost 4ch for B/L

External MOSFET

2.2MHz Frequency

HTSSOPB28

VQFN028V5050

Rohm

Confidential

・

Buck-boost DC/DC converter

・

Output current

：

Iomax=150

ｍ

A/ch

・

Wide operating voltage

：

5.0

～

30V

・

2ch constant current output

Current matching

：

3%)

・

PWM Dimmer

：

0.38

～

100% @150Hz

・

Linear Dimmer possible

・

UVLO / OVP / TSD / OCP

・

Short Circuit Protection

・

LED open/short protection

・

Frequency accuracy

：

・

Package

：

HTSSOP-B24

BD8112EFV Features

Current driver

DGND

COMP

＋

－

VCC

OVP

PWM

LED

LED1

ISET

PGND

FAIL

FAIL 1

VREG

VDAC

GND

LED

LED2

＋

BOOT

OUTH

FAIL

FAIL 2

LEDEN

OUTL

SYNC

ERR

Amp

VREG

OSC

Control

Logic

UVLO

TSD

OVP

Soft

Start

PWM

Comp

OCP

Open

Open -

-Short

Short

Detect

ISET

－

＋

ON Duty Variable

PWM dimmer

ILED

Linear dimmer

ILED

Current Variable

BD8112/13 (2ch)

Confidential

・

Correspond to

Boost

and

Buck-boost

(Integrated Boost FET)

・

Output current

：

Iomax = 400

ｍ

・

Wide operating voltage range

：

4.5

～

30V

・

1ch constant output current

（

Current accuracy

：

）

・

PWM dimming control

：

0.01

～

100% @100Hz

・

UVLO circuit / OVP / TSD / OCP

・

LED anode / cathode (SCP)

・

Oscillating frequency accuracy

：±

・

Package HTSSOP-B20 or VQFN028V5050

BD81A11EFV-M Features

ON Duty controllable

PWM dimming control

ILED

BD81A11EFV/MUV-M

C urrent driver

COMP

ERR AMP

VREG

＋

－

VCC

OVP

C ontrol Logic

－

＋

PWM

LED

ISET

PWM

P C

ISE T

FAIL

VREG

ISE T

BOOT

＋

－

O U T

SYNC

VREG

OVP

Timer

Latch

PWM

OC P

DRV

C TL

SLOPE

OUTL

DGND

OC P

OVP

OUTH

GND

PGND

ISET

OSC

RRT

UVLO

TSD

Confidential

・

Correspond to

Boost

and

Buck-boost

(Integrated Boost FET)

・

Output current

：

Io max = 120mA

・

Wide operating voltage range

：

4.5

～

30V

・

4ch

constant current output

(Current accuracy

：

3%,)

・

PWM dimming control: 0.01

～

100% @100Hz

・

UVLO circuit / OVP / TSD / OCP

・

LED anode / cathode (SCP)

・

LED open / short protection

(short detection ON/OFF function)

・

Oscillating frequency accuracy

：±

・

Package

：

HTSSOP-B28 or VQFN028V5050

BD81A04EFV-M/MUV-M Features

BD81A04EFV-M/MUV-M (4ch)

ON Duty controllable

PWM dimming control

ILED

VDAC( linear ) dimming control

ILED

Current controllable

Confidential

High Power step-up, step-down LED driver

～

2010

2012

2013

2011

BD8381EFV-M

Buck-Boost DC/DC 1ch

CR timer for dimming

LED open/short det.

Low Side current sense

HTSSOP-B28

0.6um Bi-CDMOS

0.35um Bi-CDMOS HV

BD8382EFV-M

Buck-Boost DC/DC 1ch

LED open/short det.

Low Side current sense

HTSSOP-B24

BD8392EFV/MUV-M

Buck-Boost DC/DC 1ch

LED open/short det.

High Side current sense

HTSSOP-B28(EFV)

VQFN028V5050(MUV)

BD8391EFV/MUV-M

Buck-Boost DC/DC 1ch

CR timer for dimming

LED open/short det.

High Side current sense

HTSSOP-BXX

VQFN028V5050(MUV)

BD83XXEFV-M

Buck-Boost DC/DC 1ch

CR timer for dimming

LED open/short det.

High Side current sense

Spread Spectrum

HTSSOP-BXX

In Development

Future Developments

In Production

Part Number

Application

Channel

Number

Maximum

Input Voltage

Drive

Current

Dimmer mode

DC/DC

Package

Status

BD8381EFV

DRL / Head Lamp

1ch

50V

Depend on

External Tr.

PWM Dimmer

(Integrated PWM gen.)

Buck-boost

HTSSOP-B28

BD8382EFV

Head Lamp

1ch

50V

Depend on

External Tr.

Buck-boost

HTSSOP-B24

BD8391EFV

Head Lamp

1ch

50V

Depend on

External Tr.

PWM Dimmer

(Integrated PWM gen.)

Buck-boost

HTSSOP-B20

DS available

BD8392EFV

Head Lamp

1ch

50V

Depend on

External Tr.

Buck-boost

HTSSOP-B20

DS available

BD83xxx

DRL / Head Lamp

1-3ch

50V

0.5 / 0.5 / 1A

tbd

Buck-boost

tbd

Under Study

Rohm

Confidential

・

Buck-boost DC/DC converter

・

Wide input voltage range

：

5.0

～

30V

・

Constant voltage output (FB)

：

0.2V

・

Brightness control by PWM or DC

(PWM brightness range

：

～

100

％

)

・

Integrated PWM signal generator

：

～

％

(brightness control is possible with
external CR)

・

Switching frequency

：

100kHz

～

600kHz

・

UVLO/ OVP / TSD / OCP

・

Shortcut Protection for LED anode / cathode

・

Protection for LED open / short

・

Package

：

HTSSOP-B28

BD8381EFV

DRLIN

DGND

COMP

ERR AMP

VCC

OVP

Control Logic

FAIL1

VREG

DISC

FAIL2

OCP

OVP

OPEN/SHORT/SCP

Detect

BOOT

PWM

VREG

OSC

SLOPE

TIMER

Timer

Latch

SCP Det

OCP

OVP

TSD

UVLO

Timer

Latch

PWM

DRV

CTL

LEDS

SYNC

OUTH

OUTL

VREG

THM

PGND

VTH

VREG

Open Det

GND

LEDR

LEDC

PWMOUT

SHORT

Det

BD8381EFV

Confidential

DGND

COMP

ERR AMP

VCC

OVP

Control Logic

FAIL1

VREG

DISC

FAIL2

OCP

OVP

OPEN/SHORT/SCP

Detect

BOOT

PWM

VREG

OSC

SLOPE

TIMER

Timer

Latch

SCP Det

OCP

OVP

TSD

UVLO

Timer

Latch

PWM

DRV

CTL

LEDS

SYNC

OUTH

OUTL

VREG

THM

PGND

VTH

VREG

Open Det

GND

LEDR

LEDC

PWMOUT

SHORT

Det

Protection circuit

PWM generator

Protection circuit

Buck-boost DC/DC controller

Switches for PWM

For PWM operation
an external low-side transistor
can be utilised.

Short protection

LED short is detected by
the ratio of number of
LEDs and resistors. It is
even possible to detect
one LED being shorted.

DC Brightness control

To avoid the degradation of LEDs,
a thermistor can be applied.

PWM Brightness control

PWM brightness control is
possible without a micro.
The duty can be programmed
with external CR combination.

DRLIN

BD8381 Features I

Confidential

BD8391EFV/MUV-M

・

Buck-boost DC/DC converter

・

Wide input range

：

5.0

～

30V

・

Constant voltage output

：

0.2V

・

High-side Current-Sensing

・

Brightness control by PWM or DC

(PWM brightness range

：

～

100

％

)

・

Integrated PWM signal generator

：

～

％

(brightness control is possible with external CR)

・

Switching frequency

：

200kHz

～

600kHz

・

UVLO/ OVP / TSD / OCP

・

SCP for LED anode / cathode

(SCP protects LED anode / cathode short to GND)

・

Protection for LED open / short

(LED SHORT detects LED)

・

Package

：

HTSSOP-B28

BD8391EFV/MUV Features

Confidential

・

High Side current sense

・

Buck-boost DC/DC converter

・

Wide input range

：

5.0

～

30V

・

Constant voltage output

：

0.2V

・

Integrated DC brightness control

・

Switching frequency

：

200kHz

～

600kHz

・

UVLO/ OVP / TSD / OCP

・

SCP for LED anode / cathode

・

Protection for LED open / short

・

Package

：

HTSSOP-B28

BD8392EFV Features

BD8392EFV-M

Confidential

Linear Type LED Driver

～

2010

2012

2013

2011

0.6um Bi-CDMOS

0.35um Bi-CDMOS HV

BD8372HFP/EFJ-M

Programmable Current 1ch

LED open/short det.

Iomax = 200mA

HRP-7(HFP)

HTSOP-J8(EFJ)

BD8374HFP-M

Programmable Current 1ch

CR timer / dimmer

LED open/short det.

Iomax = 500mA

HRP-7

BD8371HFP/EFJ-M

Programmable Current 1ch

LED open/short det.

Iomax = 150mA

HRP-7(HFP)

HTSOP-J8(EFJ)

BD83XXEFV-M

Buck-Boost DC/DC 1ch/2ch/3ch

CR timer for dimming

LED open/short det.

High Side current sense

HTSSOP-BXX

Switching type

In Development

Future Developments

In Production

Part Number

Application

Channel

Number

Maximum

Input Voltage

Drive

Current

Dimmer mode

DC/DC

Package

Status

BD8371HFP/EFJ

Turn / Rear Lamp

1ch

50V

150mA

High / Low current

HRP-7 /

HTSOP-J8

BD8372HFP/EFJ

Turn / Rear Lamp

1ch

50V

200mA

High / Low current

HRP-7 /

HTSOP-J8

BD8374HFP

Turn / Rear Lamp

1ch

50V

500mA

PWM Dimmer (Integrated PWM

signal generator)

HRP-7

DS available

Rohm

Confidential

・

Selectable constant current source driver

・

Output current

Iomax=200

ｍ

・

Individual settings for low- and high-current

・

Wide input voltage range

（

6.0

～

40V

）

・

Current tolerance

・

UVLO / TSD protection

・

LED open / short protection

・

PBUS function

（

Diagnostics

）

・

Package

：

HRP-7 /HTSOP-J8

BD8372EFJ/HFP Features

VREF

Current
Control

VIN

LED

OPEN Det

LED GND

SHORT Det

VREF

VREF

VIN

PBUS

IOUT

BD8372EFJ/HFP

LDO Type Driver

BD8372(Current Source Driver)

Eliminate wiring contributes to your cost reduction

Confidential

BD8374HFP-M

・

Selectable constant current source driver

・

Output current

BD8373HFP/EFJ-M

Iomax=300mA

BD8374HFP-M

Iomax=500mA

・

Brightness control by PWM or DC

(PWM brightness range

：

～

100

％

)

・

Integrated PWM signal generator

：

～

％

(brightness control is possible with

external CR)

・

Wide input range

：

5.5

～

42V

・

Tolerance of Io

：±

・

UVLO / TSD protection

・

LED open / short protection

・

PBUS function (Diagnostics)

BD8374HFP Features