TLC5904

LED DRIVER

SLLS391 – 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

DCLK

Controller

Brightness Control

Shift Register

Data Latch

16 x 8 bits

Comparator

DOUT<0:7>

GSOUT

MCENA

WDT

Gray Scale Control

Shift Register

Data Latch

Shift Register and Data Latch

BCENA

RSEL0

RSEL1

DIN<0:7>

XENABLE

DCLK

DOMODE

XOE

XLATCH

MODE

8

DELEY

GSCLK

BLANK

TSENA

WDTRG

WDCAP

IREF

16 bits

OVM Comp

8

DELEY

BOUT

XDOWN1

XDOWN2

OVM

Shift Register

Data Latch

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