BD81A24MUV-M datasheet(9/40 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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BD81A24MUV-M/EFV-M

TSZ02201-0T3T0C600070-1-2

2016.10.19 Rev.003

www.rohm.com

TSZ22111・15・001

Absolute Maximum Ratings (Ta=25°C)

Parameter

Symbol

Rating

Unit

Power Supply Voltage

VCC

40

V

BOOT, OUTH Pin Voltage

VBOOT, VOUTH

45

V

SW, CS, OUTL Pin Voltage

VSW, VCS, VOUTL

40

V

BOOT-SW Pin Voltage

VBOOT-SW

7

V

LED1 to 4, VDISC Pin Voltage

VLED1,2,3,4, VVDISC

40

V

PWM, SYNC, EN pin Voltage

VPWM, VSYNC, VEN

-0.3 to +7

V

VREG, OVP, FAIL1, FAIL2,

SS, RT pin Voltage

VVREG, VOVP, VFAIL1, VFAIL2,

VSS, VRT

-0.3 to +7 < VCC

V

LEDEN1, LEDEN2, ISET,

COMP, SHDETEN pin Voltage

VLEDEN1, VLEDEN2, VISET

VCOMP, VSHDETEN

-0.3 to +7 < VREG

V

Junction Temperature Range

Tj

-40 to +150

°C

Storage Temperature Range

Tstg

-55 to +150

°C

LED Maximum Output Current

ILED

120 (Note 1)

mA

(Note 1)

Current level per channel. Please set LED current that does not over Junction Temperature Range (Tj) maximum.

Recommended Operating Ratings

Parameter

Symbol

Rating

Unit

Min

Max

Power Supply Voltage (Note 2)

VCC

4.5

35

V

Operating Temp Range

Topr

-40

+125

°C

DC/DC Oscillation Frequency Range

FOSC

200

2200

kHz

External Synchronization Frequency Range (Note 3) (Note 4)

FSYNC

200

2200

kHz

External Synchronization Pulse Duty Range

FSDUTY

40

60

%

(Note2)

It is near Vcc terminal voltage. Please be careful the voltage drop by Vcc line impedance.

(Note3)

If don’t use an external synchronization frequency, please make the SYNC open or connect to GND.

(Note4)

If using an external synchronization frequency, don’t change to internal oscillation in the middle of process.

Recommended Parts Ratings

Parameter

Symbol

Rating

Unit

Min

Max

VREG Capacitor

CREG

1.0

4.7

μF

LED Current setting Resistance

RISET

41

250

kΩ

DC/DC Oscillation Frequency setting Resistance

RRT

3.6

41

kΩ

Soft Start setting Capacitor

CSS

0.047

0.47

μF

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