BD6086GU_11 ROHM [Rohm], BD6086GU_11 Datasheet - Page 70

• Manufacturer Part Number: BD6086GU_11
• Description: 13LEDs ALC* Flash and Illumination
• Manufacturer: ROHM [Rohm]

© 2011 ROHM Co., Ltd. All rights reserved.
www.rohm.com
BD6086GU
10. Back light current value External adjustmen １
11. Back light current value External adjustmen 2
・ Adjustment of the back light current which synchronized
・ By OSYNCEN=0, the amount of offset beforehand set as
・ The slope function is carried in the offset current.
・ If a permission is granted by register setup, the PWM drive by the external
・ It becomes PWM operation which used the back light current by a register
with the terminal input instead of timing of register writing
is possible.
the register is reflected in LED driver current synchronizing
(*) with an external terminal (OSYNC).
(*) The time of the maximum OSSLP / 2 is taken for LCD back
light LED current to start change, since it re-timing by the internal
clock in any case.
A slope sets up the change time per 2/256 step.
Switching time is common with standup/falling.
setup or automatic Luminous control as the base, and is the the best for the
brightness compensation by external control.
terminal (WPWMIN) is possible.
Bit ： IOFS(5:0)
Bit ： OSSLP(2:0)
Bit ： WPWMEN
W P W M IN
D C /D C
W P W M E N
L E D C u r r e n t
E N ( * ) :
I t is p o s s ib le t o 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 f r o n t o f E N ( * ) .
A P W M d r iv e b e c o m e s e ff e c t iv e a fte r t h e tim e o f a n L E D c u r r e n t s ta n d u p .
W h e n r is in g d u r in g P W M o p e r a tio n , a s f o r th e s ta n d u p t im e o f a D C /D C o u t p u t , o n ly th e r a te o f
P W M
e x t r e m e ly lo w D u t y a r e in p u tt e d .
P le a s e s e c u r e 5 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 r c e .
OSSLP
E N ( * )
O u tp u t
in p u t
D u t y b e c o m e s la t e . A p p e a r a n c e m a y b e in f lu e n c e d w h e n e x t r e m e ly la te f r e q u e n c y a n d
it m e a n s “ M L E D E N ” o r “ W * E N ” o r “ R G B * E N ” o r “ R G B * O S ” .
( c a s e o f s e t tin g f o r R G B L E D c o n n e c t to V O U T )
25.6mA
256
I n te r n a l S o f t- S ta r t T im e
70/80
register
LCD Back light
When OSYNCEN=0
LCD Back light
WHEN OSYNCEN=1
LED
LED current
OSYNC
OSYNC
register
WPWMEN WPWMIN
IOFS
IOFS
The present setup
current
0
0
1
1
The present setup
OSSLP
H
L
H
L
Technical Note
OSSLP
2011.04 - Rev.A
The next setup
The next setup
Normal operation
Normal operation
Normal operation
Compulsion OFF
次の設定
次の設定
Back light
current