AS3693B datasheet(16/33 Pages) AMSCO

Part #	AS3693B

Description	16 Channel high precision LED driver for LCD Backlight

PDF	33 Pages

Scroll/Zoom	100%

Manufacturer	AMSCO [ams AG]

Direct Link	http://www.ams.com

Logo

16 / 33 page

AS3693B

austriami crosyst ems

www.austriamicrosystems.com

Revision 1.21 / 2011-09-30

15 - 32

V sync

Hs ync

Delay =N * t hsync

P WM

P WM P eriode = t vsyunc

P WM duration = t vsync

P WM

Reset

P WM s ignal: High time = M * t hsync

P * t hsync > tvsync

reset with Vsync

P WM

P WM P eriode = P * t hsync

P WM s ignal: High time = M * t hsync

P * thsync < tvsync

Repetitive PWM

reset with P * thsync

Restart

Example: Two PWM output channels with fixed delays and variable high times (HT)

PWMINVERT = 0

PWMINVERT = 1

7.3.1.1 SYNC – mode PWM – generator update cycle.

VSYNC

Delayed

VSYNC

(internal)

PWM

-Store new values from serial interface

-Update delay immediately

Update HighTime, Period

-Store new values from serial interface

-Update delay immediately

-no new data

-new data

AS3693B Datasheet(PDF) 16 Page - ams AG