BD81A24MUV-M datasheet(28/40 Pages) ROHM

Part #	BD81A24MUV-M

Description	4ch White LED Driver with Buck-Boost

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Manufacturer	ROHM [Rohm]

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BD81A24MUV-M/EFV-M

TSZ02201-0T3T0C600070-1-2

2016.10.19 Rev.003

www.rohm.com

TSZ22111・15・001

Attention Point for PCB Layout

The layout pattern influences characteristic, such as

efficiency and a ripple greatly. So, it is necessary to

examine carefully about it.

Boost DC/DC has “Loop1” (in the right side figure).

Placement of these parts should be compact. And wiring

should be low-impedance (e.g. Cout’s GND and DGND

should be very near). Also, Back-Boost DC/DC has “Loop2”.

Placement of these parts and wiring should be compact

and low-impedance (e.g. Cin’s GND and D1’s GND should

be very near).

Figure 38. Circuit of DC/DC block

BD81A24MUV/EFV-M

CS

OUTH

SW

VCC

Rcs

M1

Cout

Vout

Cin

OUTL

L

D2

<Loop2>

D1

<Loop1>

DGND

RCS

D1

D2

Cin

Cout

M1

<Loop1>

<Loop2>

Figure 39. BD81A24EFV-M PCB TOP-layer

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BD81A24MUV-M Datasheet(PDF) 28 Page - Rohm

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