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FIGURE 7. A SWITCH-OPERATED LAMP DIMMER

AC ON-OFF SWITCH

G

MT1

MT2

R3

+

Z1

D1

T1

C5

-

PUSHBUTTON

SWITCH

C1

L

115VAC

OR

(SEE NOTE 1

)

220VAC

C2

8

7

6

5

TRIG V

DD

EXT S E N S

R1

R2

LS7232ND

V

SS

MODE CAP SYNC

1

2

3

4

C3

(SEE NOTE 2)

C4

R4

OUT

TO

LAMP

NOTE 1:

Operation is independent of Line Plug Polarity

NOTE 2:

See I/O Description for MODE (Pin 2)

115V

C1 = 0.15碌F, 200V

C2 = 0.22碌F, 200V

C3 = 0.047碌F, 25V

C4 = 470pF, 25V

C5 = 47碌F, 25V

R1 = 270鈩? 1/4W

R2 = 1.5M鈩? 1/4W

R3 = 100鈩? 1/4W

R4 = 1M鈩? 1/4W

D1 = IN4148

Z1 = 15V, 1W (Zener)

T1 = Q4008L4 (Typical)

L = 100碌H (RFI Filter)

220V

C1 = 0.15碌F, 400V

C2 = 0.1碌F, 400V

C3 = 0.047碌F, 25V

C4 = 470pF, 25V

C5 = 47碌F, 25V

R1 = 1k鈩? 1/4W

R2 = 1.5M鈩? 1/4W

R3 = 100鈩? 1/4W

R4 = 1M鈩? 1/4W

D1 = IN4148

Z1 = 15V, 1W (Zener)

T1 = Q5004L4 (Typical)

L = 200碌H (RFI Filter)

APPLICATIONS:

1. Foot-Switch Dimmer for large floor lamps.

2. Hand-Switch Dimmer for end-table lamps.

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.

7232ND-012703-5

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