7540-121605-3

FIGURE 2. TRIG/ OUTPUT CONDUCTION ANGLE, Ø

The information included herein is believed to be

accurate and reliable. However, LSI Computer Systems,

Inc. assumes no responsibilities for inaccuracies, nor for

any infringements of patent rights of others which may

result from its use.

ø

SYNC

TRIG/

180º

120º

60º

0°

Ø

TOUCH

MAX

DIM CYCLE

OFF

MAX

DIM CYCLE

MIN

OFF

DIM CYCLE

Ts

FIGURE 3. TOUCH vs TRIG/ CONDUCTION ANGLE, Ø

CLOCK

1

2

6

5

3

7

4

CLOCK

GENERATOR

ZERO CROSS

DETECT

AGC

TOUCH CONTROL

BRIGHTNESS

CONTROL

TRIGGER

GENERATOR

SYNC

TOUCH

CONTROL

RAMP

8

FIGURE 4. LS7540 BLOCK DIAGRAM

V+

GND

TRIG/