BD81A34MUV-M datasheet(25/36 Pages) ROHM

部品番号	BD81A34MUV-M

部品情報	4ch White LED Driver with Buck-Boost (32 LED Maximum)

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メーカー	ROHM [Rohm]

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Datasheet

BD81A34MUV-M BD81A34EFV-M

TSZ02201-0G3G0C600020-1-2

16.Jan.2014 Rev.002

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 Figure 30). 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 30. BD81A34EFV PCB TOP-layer

Figure 29. circuit of DC/DC block

VIN

Rcs

L

D2

OUTL

M1

Vout

CS

SW

OUTH

BD81A14EFV

D1

Cout

Cin

<Loop1>

<Loop2>

DGND

M2

D1

Cin

Cout

<Loop1>

<Loop2>

D2

Rcs

M1

M2

同様の部品番号 - BD81A34MUV-M

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