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AS3677 Datasheet(PDF) 25 Page - ams AG

Part # AS3677
Description  Triple Channel Lighting Management Unit with DCDC step/up, ALS, 2xDLS(=DBC) and RGB Driver
PDF  68 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS3677 Datasheet(HTML) 25 Page - ams AG

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AS3677
Datasheet - D e ta i l e d D e s c r i p t i o n
Figure 16. LED Pattern Generator
AS3677 for pattern_color = 0
To select the different current sinks to be controlled by the LED pattern generator, see the ‘xxxx’_mode registers
(where ‘xxxx’ stands for the to be controlled current sink, e.g. curr1_mode for CURR1 current sink). See also the
description of the different current sinks.
To allow the generator of a color patterns set the bit pattern_color to ‘1’. Then the pattern can be connected to CURRx
as follows:
Figure 17. LED Pattern Generator
AS3677 for pattern_color = 1
Only those current sinks will be controlled, where the ‘xxxx’_mode register is configured for LED pattern.
If the register bit pattern_slow is set, all pattern times are increased by a factor of eight. (bit duration: 250ms if
pattern_color=0 / 800ms if pattern_color=1, delays between pattern up to 56s).
Soft Dimming for Pattern
The internal pattern generator can be combined with the internal pwm dimming modulator to obtain as shown in the fol-
lowing figure:
Figure 18. Soft dimming Architecture for the
AS3677 (softdim_pattern=1 and pattern_color = 1)
     

 
  
 
        
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