BD6088GUL_11 ROHM [Rohm], BD6088GUL_11 Datasheet - Page 39

• Manufacturer Part Number: BD6088GUL_11
• Description: Mulitifunction Backlight LED Driver for Small LCD Panels (Charge Pump Type)
• Manufacturer: ROHM [Rohm]

© 2011 ROHM Co., Ltd. All rights reserved.
www.rohm.com
BD6088GUL
(10) LED current reset when mode change
(11) Current adjustment
・ It is suitable for the intensity correction by external control, because PWM based on Main LED current of register setup or
・ When mode is changed (ALC↔Non ALC),
・ When the register setting permits it, PWM drive by the external terminal (WPWMIN) is possible.
it can select the way to sloping.
Register : MDCIR
B it Name : WPWMEN
ALC control.
“0” : LED current non-reset when mode change
“1” : LED current reset when mode change
NonALC
IMLED(6:0)
mode
0mA
MDCIR= “0”
W P W M IN
mode
ALC
D C /D C
time
IU*(6:0)
W P W M E N
L E D C u r r e n t
WPWMEN
E N (* ) :
It is p o s s ib le to m a k e it a W P W M IN in p u t a n d W P W M E N = 1 in fr o n t o f E N (*) .
A P W M d r iv e b e c o m e s e ffe c tiv e a fte r th e tim e o f a n L E D c u rr e n t s ta n d u p .
W h e n r is in g d u rin g P W M o p e ra tio n , a s fo r th e s ta n d u p tim e o f a D C /D C o u tp u t, o n ly th e ra te o f
P W M D u ty b e c o m e s la te . A p p e a r a n c e m a y b e in flu e n c e d w h e n e x tr e m e ly la te fre q u e n c y a n d
e x tre m e ly lo w D u ty a r e in p u tte d .
P le a s e s e c u r e 8 0 μ s o r m o r e o f H s e c tio n s a t th e tim e o f P W M p u ls e F o rc e .
(Register)
E N (* )
O u tp u t
in p u t
NonALC
0
1
mode
IMLED(6:0)
it m e a n s “M L E D E N ” o r “W *E N ”.
" Normal operation " depends on the setup of each register.
WPWMPOL=H
(Register)
NonALC
IMLED(6:0)
mode
0mA
H
H
L
L
WPWMIN(External Pin)
In te r n a l S o ft-S ta rt T im e
39/51
MDCIR= “1”
mode
ALC
time
IU*(6:0)
WPWMPOL=L
NonALC
mode
(Register)
IMLED(6:0)
H
H
L
L
Normal operation
Normal operation
Normal operation
Forced OFF
LED current
Main group
Technical Note
2011.04 - Rev.A