BD81A24MUV-M datasheet(12/40 Pages) ROHM

Part #	BD81A24MUV-M

Description	4ch White LED Driver with Buck-Boost

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Manufacturer	ROHM [Rohm]

Direct Link	http://www.rohm.com

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Datasheet

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BD81A24MUV-M/EFV-M

TSZ02201-0T3T0C600070-1-2

2016.10.19 Rev.003

www.rohm.com

TSZ22111・15・001

Electrical Characteristics (VCC=12V, Ta = -40°C to +125°C *Unless otherwise specified)

Parameter

Symbol

Limit

Unit

Conditions

Min

Normal

Max

[UVLO]

UVLO Detection Voltage

VUVLO

3.2

3.5

3.8

V

VCC: Sweep down

UVLO Hysteresis Width

VUHYS

0.25

0.5

0.75

V

VCC: Sweep up, VREG>3.5V

[LED Output]

LED Current Relative

Dispersion

ILED1

-3

-

+3

%

ILED=50mA, Ta=25°C

∆ILED1=(ILED/ILED_AVG-1)×100

-5

-

+5

%

ILED=50mA, Ta=-40°C to 125°C

∆ILED1=(ILED/ILED_AVG-1)×100

LED Current Absolute

Dispersion

ILED2

-3

-

+3

%

ILED=50mA, Ta=25°C

∆ILED2=(ILED/50mA-1)×100

-5

-

+5

%

ILED=50mA, Ta=-40°C to 125°C

∆ILED2=(ILED/50mA-1)×100

ISET Voltage

VISET

0.9

1.0

1.1

V

RISET=100kΩ

PWM Minimum Pulse Width

TMIN

1

-

μs

FPWM=150Hz to 15kHz,

ILED=20mA to 100mA

PWM Frequency

fPWM

0.15

-

20

kHz

[Protection Circuit]

LED Open Detection Voltage

VOPEN

0.2

0.3

0.4

V

VLED1,2,3,4= Sweep down

LED Short Detection Voltage

VSHORT

4.2

4.5

4.8

V

VLED1,2,3,4= Sweep up

LED Short Detection Latch

OFF Delay Time

tSHORT

70

100

130

ms

RRT=27kΩ

SCP Latch OFF Delay Time

tSCP

70

100

130

ms

RRT=27kΩ

PWM Latch OFF Delay Time

tPWM

70

100

130

ms

RRT=27kΩ

ISET-GND Short Protection

impedance

RISETPROT

-

4.7

kΩ

[Logic Input]

Input High Voltage

VINH

2.1

-

VREG

V

EN, SYNC, SHDETEN,

PWM, LEDEN1, LEDEN2

Input Low Voltage

VINL

GND

-

0.8

V

EN, SYNC, SHDETEN,

PWM, LEDEN1, LEDEN2

Input Current

IIN

15

50

100

μA

VIN=5V(EN,SYNC, SHDETEN

PWM, LEDEN1, LEDEN2,)

[FAIL Output (Open Drain)]

FAIL Low Voltage

VOL

-

0.1

0.2

V

IOL=0.1mA

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