鈥?/div>
P
In the case of momentary power failure, the circuit state
remains unchanged for a period of up to 1 sec. For longer
power interruptions, the output is shut off.
EXTENSIONS:
All switching and dimming functions can be implemented by utilizing the
EXT input. This can be done by either a pushbutton switch or the elec-
tronic switch in conjunction with a Touch Plate, shown in Figure 6.
When the plate is touched, a logic high level is generated at the EXT
input of the IC for both half- cycles of the line frequency. (See Figure 5)
FIGURE 5. A Typical Lamp Dimmer
P
R8
+
Z
SEE NOTE 2
G
MT1
MT2
P
C7
R3
R7
EXTN
T
-
C5
SEE NOTE 5
ELECTRONIC
EXTENSION
(FIG. 6)
R6
R5
TOUCH
PLATE
115VAC
OR
220VAC
L
C1
D1
8
C2
7
6
5
TRIG V
DD
EXT S E N S
LS7232ND
R1
R2
A
SEE NOTE 3
V
SS
MODE CAP SYNC
1
2
3
4
C3
C4
C6
R4
LOAD
B
SEE NOTE 4
N
NOTES
1) All circuits connected by broken lines are optional.
2) C7 is used only with electronic extension and R7 is used only with mechanical switch.
3) See I/O Description for MODE (Pin 2)
4) Use Connection A when Neutral is not available. Use Connection B when Neutral is available.
5) Connection between Pin 6 & Pin 7 should be broken when EXT is used.
115V
C1 = 0.15碌F, 200V
(1)
C2 = 0.33碌F, 200V
C3 = 0.047碌F, 25V
C4 = 470pF, 25V
C5 = 47碌F, 25V
C6 = 680pF, 25V
C7 = 0.1碌F, 25V
(2)
R1 = 270鈩? 1W
R2 = 1.5M鈩? 1/4W
R3 = 1.5M鈩? 1/4W
R4 = 1M鈩?to 5M鈩? 1/4W
(Select for sensitivity)
R5, R6 = 2.7M鈩? 1/4W
R7 = 150k鈩? 1/4W
R8 = 100鈩? 1/4W
D1 = IN4148
Z = 15V, 1W (Zener)
T = Q4006L4 Triac (Typical)
L = 100碌H (RFI Filter)
C1 = 0.15碌F, 400V
(3)
C2 = 0.22碌F, 400V
C3 = 0.047碌F, 25V
C4 = 470pF, 25V
C5 = 47碌F, 25V
C6 = 680pF, 25V
C7 = 0.1碌F, 25V
(4)
R1 = 1k鈩? 2W
R2 = 1.5M鈩? 1/4W
R3 = 1.5M鈩? 1/4W
220V
R4 = 1M鈩?to 5M鈩? 1/4W
(Select for sensitivity)
R5, R6 = 4.7M鈩? 1/4W
R7 = 150k鈩? 1/4W
R8 = 100鈩? 1/4W
D1 = 1N4148
Z = 15V, 1W (Zener)
T = Q5004L4 Triac (Typical)
L = 200碌H (RFI Filter)
(1)
For Connection A. Use 0.22碌F for Connection B.
(2)
For Connection A. Use 1/4W for Connection B.
7232ND-012703-4
(3)
For Connection A. Use 0.1碌F for Connection B.
(4)
For Connection A. Use 1/4W for Connection B
.
1
2
3
4
5
