BD2802GU データシートの表示（PDF） - ROHM Semiconductor

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BD2802GU

System LED Drivers for Mobile phones 6LEDs Illumination

ROHM Semiconductor 

BD2802GU

7. RGB waveform setting examples

【[E例xam1】plノe 1ー] Nマoルrm動al作operation

W波ave形fo周rm 期cycle

Technical Note

【[E例xam4】pl1e64H] z16動H作z operation

W波ave形fo周rm 期cycle

R*LED

R*LED

G*LED

G*LED

B*LED

B*LED

RGB*EN=1

RGB*EN=0

Selecting a waveform pattern 8 causes a continuous

normal operation to take place through the setting

current 1.

【[E例xam2】plブe 2リ] Bンliクnk動ing作

W波ave形fo周rm 期cycle

R*LED

RGB*EN=1

RGB*EN=0

Combining the settings of a waveform pattern 11 and a

waveform cycle 131ms causes blinking at a rate of

15.3Hz (approx. 16Hz).

【[E例xam5】pl4e 連5]単Co発ntinuous lighting of four W波ave形fo周rm 期cycle

LEDs

R*LED

G*LED

G*LED

B*LED

B*LED

RGB*EN=1

RGB*EN=0

Setting a rising/falling slope time to “0” causes blinking

to take place. Phase switching takes place via the

setting currents of R and G.

【[E例xa３mp】leス3ロ] Sーloプpe動o作peration

W波ave形for周m 期cycle

R*LED

RGB*OS=1

This example shows that lighting occurs continuously in

the order of white, red, red and red. To achieve this,

waveform patterns 16, 1 and RGB*OS single cycle

operation need to be combined.

【[E例xam6】ple7 6色] 変7-c色oスlorロchーaプnge slope

operation

W波ave形for周m 期cycle

R*LED

G*LED

G*LED

B*LED

B*LED

RGB*EN=1

RGB*EN=０

When a rising/falling slope time is longer than the

setting made in example 2, a continuous color change

is made by slope operation.

RGB*EN=1

RGB*EN=０

R, G and B waveform patterns are set in a way that any

of R, G and B changes constantly.

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2011.04 - Rev.A

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