TLC5905

LED DRIVER

SLLS401 – NOVEMBER 1999

3

POST OFFICE BOX 655303

functional block diagram

LATCH

Current Reference

Circuit

OUT0

OUT15

16 bits

Constant Current Driver

TSD

8 bits

Gray Scale

Counter

SCLK

Controller

Brightness Control

Shift Register

Data Latch

16 x 8 bits

Comparator

SOUT

GSOUT

MCENA

WDT

Gray Scale Control

Shift Register

Data Latch

Shift Register and Data Latch

BCENA

RSEL0

RSEL1

SIN

XENABLE

SCLK

SOMODE

XOE

XLATCH

MODE

DELEY

GSCLK

BLANK

TSENA

WDTRG

WDCAP

IREF

16 bits

OVM Comp

DELEY

BOUT

XDOWN1

XDOWN2

OVM

Shift Register

Data Latch

NOTE: All the input terminals are with Schmitt-triggered inverter except IREF and WDCAP.