LS7540 데이터 시트보기 (PDF) - LSI Corporation

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LS7540

TOUCH CONTROL CONTINUOUS DIMMER with AUTOMATIC GAIN CONTROL (AGC)

LSI Corporation  

FIGURE 2. TRIG/ OUTPUT CONDUCTION ANGLE, Ø

SYNC

ø

TRIG/

TW

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.

TOUCH

180º

Ø 120º

60º

0°

Ts

MAX

DIM CYCLE

MAX

DIM CYCLE

DIM CYCLE

OFF

TT

MIN

OFF

FIGURE 3. TOUCH vs TRIG/ CONDUCTION ANGLE, Ø

CLOCK 1

CLOCK

GENERATOR

SYNC 2

TOUCH 4

CONTROL 5

RAMP 6

V DD 3

V SS 7

7540-121605-3

ZERO CROSS

DETECT

AGC

TOUCH CONTROL

BRIGHTNESS

CONTROL

TRIGGER

GENERATOR

V+

GND

FIGURE 4. LS7540 BLOCK DIAGRAM

8 TRIG/

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